/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/array-examples/standard_init5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:41:55,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:41:55,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:41:55,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:41:55,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:41:55,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:41:55,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:41:55,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:41:55,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:41:55,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:41:55,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:41:55,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:41:55,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:41:55,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:41:55,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:41:55,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:41:55,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:41:55,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:41:55,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:41:55,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:41:55,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:41:55,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:41:55,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:41:55,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:41:55,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:41:55,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:41:55,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:41:55,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:41:55,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:41:55,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:41:55,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:41:55,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:41:55,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:41:55,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:41:55,169 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:41:55,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:41:55,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:41:55,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:41:55,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:41:55,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:41:55,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:41:55,198 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 03:41:55,257 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:41:55,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:41:55,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:41:55,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:41:55,262 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:41:55,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:41:55,264 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:41:55,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:41:55,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:41:55,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:41:55,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:41:55,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:41:55,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:41:55,268 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:41:55,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:41:55,269 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:41:55,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:41:55,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:41:55,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:41:55,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:41:55,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:41:55,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:41:55,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:41:55,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:41:55,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:41:55,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:41:55,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:41:55,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:41:55,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:41:55,273 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:41:55,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:41:55,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:41:55,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:41:55,771 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:41:55,772 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:41:55,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-2.i [2020-10-29 03:41:55,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/414e02e5c/2aa11414cfd44eff89f92131003f124c/FLAG9f1697e19 [2020-10-29 03:41:56,417 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:41:56,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init5_ground-2.i [2020-10-29 03:41:56,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/414e02e5c/2aa11414cfd44eff89f92131003f124c/FLAG9f1697e19 [2020-10-29 03:41:56,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/414e02e5c/2aa11414cfd44eff89f92131003f124c [2020-10-29 03:41:56,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:41:56,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:41:56,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:41:56,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:41:56,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:41:56,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:41:56" (1/1) ... [2020-10-29 03:41:56,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7abd4cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:41:56, skipping insertion in model container [2020-10-29 03:41:56,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:41:56" (1/1) ... [2020-10-29 03:41:56,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:41:56,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:41:57,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:41:57,029 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:41:57,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:41:57,101 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:41:57,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:41:57 WrapperNode [2020-10-29 03:41:57,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:41:57,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:41:57,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:41:57,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:41:57,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:41:57" (1/1) ... [2020-10-29 03:41:57,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:41:57" (1/1) ... [2020-10-29 03:41:57,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:41:57" (1/1) ... [2020-10-29 03:41:57,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:41:57" (1/1) ... [2020-10-29 03:41:57,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:41:57" (1/1) ... [2020-10-29 03:41:57,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:41:57" (1/1) ... [2020-10-29 03:41:57,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:41:57" (1/1) ... [2020-10-29 03:41:57,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:41:57,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:41:57,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:41:57,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:41:57,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:41:57" (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 03:41:57,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:41:57,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:41:57,284 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:41:57,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:41:57,284 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:41:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:41:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:41:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 03:41:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 03:41:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:41:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:41:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:41:57,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:41:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:41:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:41:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:41:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:41:57,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:41:57,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:41:57,671 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:41:57,671 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-29 03:41:57,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:41:57 BoogieIcfgContainer [2020-10-29 03:41:57,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:41:57,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:41:57,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:41:57,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:41:57,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:41:56" (1/3) ... [2020-10-29 03:41:57,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d29de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:41:57, skipping insertion in model container [2020-10-29 03:41:57,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:41:57" (2/3) ... [2020-10-29 03:41:57,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d29de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:41:57, skipping insertion in model container [2020-10-29 03:41:57,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:41:57" (3/3) ... [2020-10-29 03:41:57,684 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-2.i [2020-10-29 03:41:57,697 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:41:57,713 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:41:57,752 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:41:57,825 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:41:57,825 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:41:57,825 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:41:57,826 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:41:57,826 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:41:57,826 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:41:57,826 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:41:57,826 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:41:57,853 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-29 03:41:57,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 03:41:57,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:41:57,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:41:57,865 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:41:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:41:57,877 INFO L82 PathProgramCache]: Analyzing trace with hash -573516862, now seen corresponding path program 1 times [2020-10-29 03:41:57,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:41:57,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804277483] [2020-10-29 03:41:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:41:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:58,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:58,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:58,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:58,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:58,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:59,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:59,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 03:41:59,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:41:59,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1035 [2020-10-29 03:41:59,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:59,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:59,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 03:41:59,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 03:41:59,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 03:41:59,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 03:41:59,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:41:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:59,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:59,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:41:59,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:41:59,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:41:59,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:41:59,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:41:59,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:41:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:41:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:41:59,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:41:59,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:41:59,299 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 03:41:59,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804277483] [2020-10-29 03:41:59,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:41:59,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 03:41:59,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9752892] [2020-10-29 03:41:59,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 03:41:59,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:41:59,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 03:41:59,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 03:41:59,328 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-10-29 03:41:59,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:41:59,530 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2020-10-29 03:41:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 03:41:59,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-29 03:41:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:41:59,541 INFO L225 Difference]: With dead ends: 67 [2020-10-29 03:41:59,541 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 03:41:59,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 03:41:59,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 03:41:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-29 03:41:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 03:41:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-29 03:41:59,593 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-29 03:41:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:41:59,593 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-29 03:41:59,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 03:41:59,593 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-29 03:41:59,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 03:41:59,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:41:59,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:41:59,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:41:59,596 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:41:59,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:41:59,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1849424926, now seen corresponding path program 1 times [2020-10-29 03:41:59,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:41:59,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740776042] [2020-10-29 03:41:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:41:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:41:59,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:59,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:59,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:59,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:41:59,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:00,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:04,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:04,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 03:42:04,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:42:04,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 03:42:04,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:04,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:04,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 03:42:04,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:42:04,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 03:42:04,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:42:04,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:42:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:04,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:04,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:04,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:42:04,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:42:04,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:42:04,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:04,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:04,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:42:04,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:42:04,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:42:04,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:42:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:42:04,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740776042] [2020-10-29 03:42:04,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:42:04,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:42:04,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531959861] [2020-10-29 03:42:04,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:42:04,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:42:04,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:42:04,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:42:04,837 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 10 states. [2020-10-29 03:42:05,531 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-10-29 03:42:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:42:05,737 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-29 03:42:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 03:42:05,740 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-29 03:42:05,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:42:05,747 INFO L225 Difference]: With dead ends: 60 [2020-10-29 03:42:05,748 INFO L226 Difference]: Without dead ends: 56 [2020-10-29 03:42:05,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:42:05,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-29 03:42:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-29 03:42:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 03:42:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-29 03:42:05,789 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 28 [2020-10-29 03:42:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:42:05,790 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-29 03:42:05,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:42:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-29 03:42:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 03:42:05,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:42:05,792 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:42:05,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:42:05,792 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:42:05,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:42:05,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1013361724, now seen corresponding path program 2 times [2020-10-29 03:42:05,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:42:05,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466661166] [2020-10-29 03:42:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:42:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:05,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:05,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:05,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:05,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:05,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:07,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:10,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:10,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 03:42:10,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:42:10,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:42:10,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:10,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:10,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:42:10,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:42:10,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 03:42:10,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:42:11,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:42:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:11,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:11,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:11,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:42:11,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:42:11,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:42:11,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:11,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:11,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:42:11,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:42:11,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:42:11,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:42:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:42:11,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466661166] [2020-10-29 03:42:11,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:42:11,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 03:42:11,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103722571] [2020-10-29 03:42:11,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 03:42:11,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:42:11,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 03:42:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:42:11,146 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 11 states. [2020-10-29 03:42:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:42:11,845 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2020-10-29 03:42:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:42:11,846 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-29 03:42:11,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:42:11,850 INFO L225 Difference]: With dead ends: 71 [2020-10-29 03:42:11,850 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 03:42:11,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:42:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 03:42:11,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 42. [2020-10-29 03:42:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 03:42:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-29 03:42:11,862 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 29 [2020-10-29 03:42:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:42:11,862 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-29 03:42:11,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 03:42:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-29 03:42:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 03:42:11,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:42:11,864 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, 1, 1, 1, 1, 1, 1] [2020-10-29 03:42:11,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:42:11,864 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:42:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:42:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash 865206238, now seen corresponding path program 3 times [2020-10-29 03:42:11,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:42:11,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478388838] [2020-10-29 03:42:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:42:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:11,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:11,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:11,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:11,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:11,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:13,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:16,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:16,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 03:42:16,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:42:16,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:42:16,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:16,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 03:42:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:42:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 03:42:16,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:17,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:42:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:17,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:17,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:17,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:42:17,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:42:17,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:42:17,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:17,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:17,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:42:17,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:42:17,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:42:17,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:42:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:42:17,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478388838] [2020-10-29 03:42:17,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:42:17,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:42:17,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48489582] [2020-10-29 03:42:17,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:42:17,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:42:17,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:42:17,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:42:17,274 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 12 states. [2020-10-29 03:42:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:42:17,969 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2020-10-29 03:42:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:42:17,970 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-29 03:42:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:42:17,972 INFO L225 Difference]: With dead ends: 75 [2020-10-29 03:42:17,972 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 03:42:17,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:42:17,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 03:42:17,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 43. [2020-10-29 03:42:17,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 03:42:17,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-29 03:42:17,992 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 30 [2020-10-29 03:42:17,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:42:17,993 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-29 03:42:17,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:42:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-29 03:42:17,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 03:42:17,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:42:17,995 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:42:17,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:42:17,995 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:42:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:42:17,996 INFO L82 PathProgramCache]: Analyzing trace with hash 567353468, now seen corresponding path program 4 times [2020-10-29 03:42:17,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:42:17,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149102611] [2020-10-29 03:42:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:42:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:18,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:18,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:18,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:18,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:18,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:19,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:23,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:23,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 03:42:23,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:42:23,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:42:23,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:23,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:23,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:42:23,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:42:23,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 03:42:23,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:23,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:42:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:23,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:23,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:23,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:42:23,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:42:23,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 03:42:23,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:23,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:23,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:42:23,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:42:23,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:42:23,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:42:23,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149102611] [2020-10-29 03:42:23,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:42:23,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 03:42:23,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168037466] [2020-10-29 03:42:23,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 03:42:23,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:42:23,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 03:42:23,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-29 03:42:23,315 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 13 states. [2020-10-29 03:42:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:42:23,842 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2020-10-29 03:42:23,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:42:23,846 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-29 03:42:23,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:42:23,848 INFO L225 Difference]: With dead ends: 79 [2020-10-29 03:42:23,849 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 03:42:23,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:42:23,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 03:42:23,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2020-10-29 03:42:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 03:42:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-10-29 03:42:23,861 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2020-10-29 03:42:23,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:42:23,862 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-10-29 03:42:23,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 03:42:23,862 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-10-29 03:42:23,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 03:42:23,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:42:23,863 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:42:23,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:42:23,863 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:42:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:42:23,864 INFO L82 PathProgramCache]: Analyzing trace with hash -76147810, now seen corresponding path program 5 times [2020-10-29 03:42:23,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:42:23,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236614075] [2020-10-29 03:42:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:42:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:23,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:23,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:23,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:23,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:23,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:25,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:28,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:28,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 03:42:28,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:42:28,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:42:28,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:28,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:28,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 03:42:28,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:42:28,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 03:42:28,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:29,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:42:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:29,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:29,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:29,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:42:29,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:42:29,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:42:29,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:29,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:29,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:42:29,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:42:29,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:42:29,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:42:29,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236614075] [2020-10-29 03:42:29,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:42:29,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:42:29,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628000384] [2020-10-29 03:42:29,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:42:29,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:42:29,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:42:29,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:42:29,205 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 14 states. [2020-10-29 03:42:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:42:29,764 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2020-10-29 03:42:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:42:29,764 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-29 03:42:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:42:29,766 INFO L225 Difference]: With dead ends: 83 [2020-10-29 03:42:29,766 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 03:42:29,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:42:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 03:42:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 45. [2020-10-29 03:42:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 03:42:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-29 03:42:29,777 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 32 [2020-10-29 03:42:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:42:29,777 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-29 03:42:29,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:42:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-29 03:42:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 03:42:29,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:42:29,779 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:42:29,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:42:29,779 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:42:29,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:42:29,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1450149052, now seen corresponding path program 6 times [2020-10-29 03:42:29,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:42:29,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949043394] [2020-10-29 03:42:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:42:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:29,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:29,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:29,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:29,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:29,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:31,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:34,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:34,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 03:42:34,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:42:34,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:42:34,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:34,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:34,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:42:34,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:42:34,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 03:42:34,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:35,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:42:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:35,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:35,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:35,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:42:35,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:42:35,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:42:35,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:35,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:35,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:42:35,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:42:35,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:42:35,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:42:35,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949043394] [2020-10-29 03:42:35,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:42:35,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 03:42:35,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721303030] [2020-10-29 03:42:35,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 03:42:35,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:42:35,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 03:42:35,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 03:42:35,147 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 15 states. [2020-10-29 03:42:35,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:42:35,680 INFO L93 Difference]: Finished difference Result 87 states and 117 transitions. [2020-10-29 03:42:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:42:35,681 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-29 03:42:35,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:42:35,683 INFO L225 Difference]: With dead ends: 87 [2020-10-29 03:42:35,683 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 03:42:35,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:42:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 03:42:35,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 46. [2020-10-29 03:42:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 03:42:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-29 03:42:35,696 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 33 [2020-10-29 03:42:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:42:35,696 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-29 03:42:35,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 03:42:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-29 03:42:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 03:42:35,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:42:35,697 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:42:35,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:42:35,698 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:42:35,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:42:35,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1520711518, now seen corresponding path program 7 times [2020-10-29 03:42:35,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:42:35,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114174437] [2020-10-29 03:42:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:42:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:35,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:35,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:35,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:35,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:35,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:37,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:40,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:40,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 03:42:40,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:42:40,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:42:40,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:40,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:40,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 03:42:40,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:42:40,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 03:42:40,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:42:41,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:42:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:41,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:41,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:41,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:42:41,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:42:41,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:42:41,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:41,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:41,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:42:41,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:42:41,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:42:41,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:42:41,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114174437] [2020-10-29 03:42:41,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:42:41,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:42:41,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792633] [2020-10-29 03:42:41,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:42:41,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:42:41,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:42:41,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:42:41,049 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 16 states. [2020-10-29 03:42:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:42:41,649 INFO L93 Difference]: Finished difference Result 91 states and 125 transitions. [2020-10-29 03:42:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:42:41,650 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-29 03:42:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:42:41,652 INFO L225 Difference]: With dead ends: 91 [2020-10-29 03:42:41,652 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 03:42:41,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:42:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 03:42:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 47. [2020-10-29 03:42:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 03:42:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-10-29 03:42:41,662 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 34 [2020-10-29 03:42:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:42:41,663 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-10-29 03:42:41,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:42:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-10-29 03:42:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 03:42:41,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:42:41,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:42:41,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:42:41,665 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:42:41,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:42:41,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1563391736, now seen corresponding path program 1 times [2020-10-29 03:42:41,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:42:41,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895163252] [2020-10-29 03:42:41,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:42:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:41,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:41,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:41,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:41,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:41,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:41,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:41,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:42,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:43,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:46,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:46,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 03:42:46,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:42:46,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:42:46,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:46,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:46,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:42:46,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 03:42:46,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 03:42:46,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:46,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:42:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:46,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:46,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:46,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:42:46,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:42:46,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:42:46,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:46,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:46,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:42:46,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:42:46,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:42:46,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:46,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-29 03:42:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:46,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:46,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:46,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 03:42:46,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:42:46,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:42:46,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:46,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:46,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:42:46,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 03:42:46,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 03:42:46,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 03:42:46,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895163252] [2020-10-29 03:42:46,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:42:46,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 03:42:46,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907929246] [2020-10-29 03:42:46,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 03:42:46,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:42:46,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 03:42:46,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-29 03:42:46,829 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 11 states. [2020-10-29 03:42:47,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:42:47,228 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-10-29 03:42:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 03:42:47,229 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-29 03:42:47,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:42:47,230 INFO L225 Difference]: With dead ends: 69 [2020-10-29 03:42:47,230 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 03:42:47,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:42:47,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 03:42:47,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-10-29 03:42:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 03:42:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-29 03:42:47,239 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 36 [2020-10-29 03:42:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:42:47,239 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-29 03:42:47,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 03:42:47,239 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-29 03:42:47,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 03:42:47,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:42:47,240 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:42:47,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:42:47,241 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:42:47,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:42:47,241 INFO L82 PathProgramCache]: Analyzing trace with hash -586819332, now seen corresponding path program 8 times [2020-10-29 03:42:47,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:42:47,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299211937] [2020-10-29 03:42:47,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:42:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:47,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:47,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:47,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:47,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:47,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:49,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:52,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:52,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 03:42:52,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:42:52,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:42:52,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:52,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:52,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:42:52,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:42:52,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 03:42:52,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:52,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:42:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:52,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:52,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:52,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:42:52,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:42:52,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:42:52,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:52,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:52,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:42:52,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:42:52,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:42:52,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:42:52,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299211937] [2020-10-29 03:42:52,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:42:52,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:42:52,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841663950] [2020-10-29 03:42:52,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:42:52,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:42:52,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:42:52,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:42:52,704 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 17 states. [2020-10-29 03:42:53,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:42:53,219 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2020-10-29 03:42:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:42:53,220 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-29 03:42:53,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:42:53,221 INFO L225 Difference]: With dead ends: 76 [2020-10-29 03:42:53,221 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 03:42:53,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:42:53,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 03:42:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 37. [2020-10-29 03:42:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 03:42:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-29 03:42:53,240 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 35 [2020-10-29 03:42:53,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:42:53,241 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-29 03:42:53,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:42:53,241 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-29 03:42:53,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 03:42:53,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:42:53,242 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:42:53,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:42:53,245 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:42:53,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:42:53,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1495766242, now seen corresponding path program 9 times [2020-10-29 03:42:53,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:42:53,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131333385] [2020-10-29 03:42:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:42:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:53,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:53,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:53,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:53,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:53,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:54,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:58,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:58,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 03:42:58,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:42:58,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:42:58,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:58,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:58,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 03:42:58,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:42:58,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 03:42:58,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:58,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:42:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:58,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:58,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:42:58,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:42:58,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:42:58,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:42:58,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:42:58,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:42:58,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:42:58,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:42:58,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:42:58,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:42:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:42:58,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131333385] [2020-10-29 03:42:58,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:42:58,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:42:58,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327381704] [2020-10-29 03:42:58,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:42:58,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:42:58,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:42:58,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:42:58,809 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 18 states. [2020-10-29 03:42:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:42:59,290 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2020-10-29 03:42:59,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:42:59,291 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-29 03:42:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:42:59,291 INFO L225 Difference]: With dead ends: 80 [2020-10-29 03:42:59,292 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 03:42:59,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:42:59,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 03:42:59,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2020-10-29 03:42:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 03:42:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-29 03:42:59,299 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 36 [2020-10-29 03:42:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:42:59,299 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-29 03:42:59,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:42:59,300 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-29 03:42:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 03:42:59,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:42:59,301 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:42:59,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:42:59,301 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:42:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:42:59,302 INFO L82 PathProgramCache]: Analyzing trace with hash 391650620, now seen corresponding path program 10 times [2020-10-29 03:42:59,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:42:59,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140415656] [2020-10-29 03:42:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:42:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:42:59,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:59,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:59,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:59,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:42:59,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:00,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:04,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:04,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 03:43:04,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:43:04,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:43:04,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:04,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:04,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:43:04,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:43:04,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 03:43:04,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:04,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:43:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:04,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:04,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:04,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:43:04,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:43:04,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:43:04,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:04,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:04,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:43:04,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:43:04,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:43:04,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:43:04,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140415656] [2020-10-29 03:43:04,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:43:04,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 03:43:04,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496504146] [2020-10-29 03:43:04,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 03:43:04,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:43:04,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 03:43:04,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:43:04,851 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 19 states. [2020-10-29 03:43:05,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:43:05,397 INFO L93 Difference]: Finished difference Result 84 states and 118 transitions. [2020-10-29 03:43:05,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:43:05,398 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-10-29 03:43:05,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:43:05,399 INFO L225 Difference]: With dead ends: 84 [2020-10-29 03:43:05,399 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 03:43:05,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:43:05,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 03:43:05,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 39. [2020-10-29 03:43:05,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 03:43:05,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-29 03:43:05,407 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 37 [2020-10-29 03:43:05,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:43:05,407 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-29 03:43:05,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 03:43:05,408 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-29 03:43:05,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 03:43:05,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:43:05,409 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:43:05,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:43:05,409 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:43:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:43:05,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1227968802, now seen corresponding path program 11 times [2020-10-29 03:43:05,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:43:05,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620666630] [2020-10-29 03:43:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:43:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:05,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:05,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:05,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:05,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:05,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:07,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:10,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:10,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 03:43:10,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:43:10,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:43:10,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:10,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:10,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 03:43:10,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:43:10,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 03:43:10,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:11,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:43:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:11,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:11,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:11,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:43:11,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:43:11,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:43:11,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:11,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:11,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:43:11,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:43:11,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:43:11,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:43:11,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620666630] [2020-10-29 03:43:11,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:43:11,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:43:11,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047323878] [2020-10-29 03:43:11,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:43:11,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:43:11,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:43:11,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:43:11,058 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 20 states. [2020-10-29 03:43:11,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:43:11,627 INFO L93 Difference]: Finished difference Result 88 states and 125 transitions. [2020-10-29 03:43:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 03:43:11,628 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-29 03:43:11,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:43:11,629 INFO L225 Difference]: With dead ends: 88 [2020-10-29 03:43:11,629 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 03:43:11,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:43:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 03:43:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 40. [2020-10-29 03:43:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 03:43:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-29 03:43:11,642 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 38 [2020-10-29 03:43:11,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:43:11,642 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-29 03:43:11,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:43:11,642 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-29 03:43:11,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 03:43:11,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:43:11,643 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:43:11,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:43:11,644 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:43:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:43:11,644 INFO L82 PathProgramCache]: Analyzing trace with hash 103436668, now seen corresponding path program 12 times [2020-10-29 03:43:11,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:43:11,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436168307] [2020-10-29 03:43:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:43:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:11,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:11,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:11,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:11,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:11,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:13,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:16,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:16,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 03:43:16,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:43:16,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:43:16,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:16,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:16,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:43:16,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:43:16,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:43:16,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:17,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:43:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:17,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:17,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:17,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:43:17,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:43:17,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:43:17,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:17,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:17,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:43:17,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:43:17,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:43:17,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:43:17,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436168307] [2020-10-29 03:43:17,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:43:17,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 03:43:17,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186429151] [2020-10-29 03:43:17,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 03:43:17,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:43:17,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 03:43:17,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:43:17,422 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 21 states. [2020-10-29 03:43:18,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:43:18,102 INFO L93 Difference]: Finished difference Result 92 states and 132 transitions. [2020-10-29 03:43:18,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:43:18,103 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-29 03:43:18,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:43:18,105 INFO L225 Difference]: With dead ends: 92 [2020-10-29 03:43:18,105 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 03:43:18,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:43:18,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 03:43:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 41. [2020-10-29 03:43:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 03:43:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-29 03:43:18,114 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 39 [2020-10-29 03:43:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:43:18,114 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-29 03:43:18,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 03:43:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-29 03:43:18,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 03:43:18,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:43:18,115 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:43:18,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:43:18,116 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:43:18,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:43:18,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1572666722, now seen corresponding path program 13 times [2020-10-29 03:43:18,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:43:18,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231019245] [2020-10-29 03:43:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:43:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:18,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:18,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:18,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:18,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:18,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:20,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:23,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:23,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 03:43:23,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:43:23,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:43:23,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:23,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:23,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 03:43:23,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:43:23,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 03:43:23,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:23,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:43:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:23,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:23,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:23,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:43:23,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:43:23,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:43:23,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:23,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:23,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:43:23,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:43:23,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:43:23,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:43:23,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231019245] [2020-10-29 03:43:23,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:43:23,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 03:43:23,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475295267] [2020-10-29 03:43:23,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 03:43:23,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:43:23,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 03:43:23,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-10-29 03:43:23,943 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 22 states. [2020-10-29 03:43:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:43:24,639 INFO L93 Difference]: Finished difference Result 96 states and 139 transitions. [2020-10-29 03:43:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 03:43:24,639 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 40 [2020-10-29 03:43:24,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:43:24,640 INFO L225 Difference]: With dead ends: 96 [2020-10-29 03:43:24,640 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 03:43:24,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:43:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 03:43:24,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 42. [2020-10-29 03:43:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 03:43:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-29 03:43:24,649 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 40 [2020-10-29 03:43:24,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:43:24,649 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-29 03:43:24,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 03:43:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-29 03:43:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 03:43:24,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:43:24,650 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:43:24,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:43:24,650 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:43:24,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:43:24,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1992264260, now seen corresponding path program 14 times [2020-10-29 03:43:24,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:43:24,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259008914] [2020-10-29 03:43:24,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:43:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:24,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:24,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:24,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:24,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:24,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:26,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:29,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:29,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 03:43:29,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:43:29,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:43:29,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:29,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:29,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 03:43:29,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:43:29,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:43:29,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:30,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:43:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:30,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:30,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:30,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:43:30,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:43:30,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:43:30,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:30,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:30,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:43:30,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:43:30,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:43:30,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:43:30,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259008914] [2020-10-29 03:43:30,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:43:30,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 03:43:30,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684045705] [2020-10-29 03:43:30,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 03:43:30,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:43:30,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 03:43:30,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:43:30,551 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 23 states. [2020-10-29 03:43:31,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:43:31,250 INFO L93 Difference]: Finished difference Result 100 states and 146 transitions. [2020-10-29 03:43:31,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 03:43:31,252 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 41 [2020-10-29 03:43:31,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:43:31,253 INFO L225 Difference]: With dead ends: 100 [2020-10-29 03:43:31,253 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 03:43:31,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:43:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 03:43:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 43. [2020-10-29 03:43:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 03:43:31,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-29 03:43:31,261 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 41 [2020-10-29 03:43:31,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:43:31,261 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-29 03:43:31,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 03:43:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-29 03:43:31,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 03:43:31,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:43:31,262 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:43:31,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:43:31,262 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:43:31,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:43:31,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2114886050, now seen corresponding path program 15 times [2020-10-29 03:43:31,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:43:31,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446290715] [2020-10-29 03:43:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:43:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:31,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:31,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:31,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:31,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:31,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:33,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:36,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:36,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 03:43:36,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:43:36,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:43:36,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:36,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:36,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 03:43:36,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:43:36,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 03:43:36,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:37,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:43:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:37,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:37,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:37,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:43:37,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:43:37,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:43:37,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:37,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:37,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:43:37,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:43:37,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:43:37,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:43:37,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446290715] [2020-10-29 03:43:37,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:43:37,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 03:43:37,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755110078] [2020-10-29 03:43:37,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 03:43:37,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:43:37,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 03:43:37,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:43:37,290 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 24 states. [2020-10-29 03:43:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:43:38,105 INFO L93 Difference]: Finished difference Result 104 states and 153 transitions. [2020-10-29 03:43:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:43:38,105 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2020-10-29 03:43:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:43:38,107 INFO L225 Difference]: With dead ends: 104 [2020-10-29 03:43:38,107 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 03:43:38,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=249, Invalid=563, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:43:38,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 03:43:38,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 44. [2020-10-29 03:43:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 03:43:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-29 03:43:38,116 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 42 [2020-10-29 03:43:38,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:43:38,116 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-29 03:43:38,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 03:43:38,116 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-29 03:43:38,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 03:43:38,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:43:38,117 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:43:38,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:43:38,117 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:43:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:43:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1621194244, now seen corresponding path program 16 times [2020-10-29 03:43:38,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:43:38,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537107845] [2020-10-29 03:43:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:43:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:38,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:38,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:38,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:38,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:38,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:40,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:43,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:43,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 03:43:43,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:43:43,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:43:43,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:43,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:43,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:43:43,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:43:43,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 03:43:43,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:44,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:43:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:44,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:44,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:44,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:43:44,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:43:44,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:43:44,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:44,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:44,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:43:44,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:43:44,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:43:44,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:43:44,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537107845] [2020-10-29 03:43:44,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:43:44,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 03:43:44,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373361589] [2020-10-29 03:43:44,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 03:43:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:43:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 03:43:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:43:44,373 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 25 states. [2020-10-29 03:43:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:43:45,122 INFO L93 Difference]: Finished difference Result 108 states and 160 transitions. [2020-10-29 03:43:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:43:45,124 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2020-10-29 03:43:45,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:43:45,125 INFO L225 Difference]: With dead ends: 108 [2020-10-29 03:43:45,125 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 03:43:45,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:43:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 03:43:45,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 45. [2020-10-29 03:43:45,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 03:43:45,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-29 03:43:45,136 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 43 [2020-10-29 03:43:45,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:43:45,137 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-29 03:43:45,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 03:43:45,137 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-29 03:43:45,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 03:43:45,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:43:45,137 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:43:45,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:43:45,138 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:43:45,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:43:45,138 INFO L82 PathProgramCache]: Analyzing trace with hash 798349854, now seen corresponding path program 17 times [2020-10-29 03:43:45,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:43:45,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871081387] [2020-10-29 03:43:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:43:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:45,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:45,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:45,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:45,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:45,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:48,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:50,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:50,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 03:43:50,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:43:50,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:43:50,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:50,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:50,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 03:43:50,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:43:50,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 03:43:50,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:50,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:43:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:50,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:50,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:50,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:43:50,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:43:50,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:43:50,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:50,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:50,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:43:50,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:43:50,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:43:50,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:43:50,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871081387] [2020-10-29 03:43:50,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:43:50,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:43:50,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201768782] [2020-10-29 03:43:50,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:43:50,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:43:50,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:43:50,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:43:50,950 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 26 states. [2020-10-29 03:43:51,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:43:51,697 INFO L93 Difference]: Finished difference Result 112 states and 167 transitions. [2020-10-29 03:43:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 03:43:51,697 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2020-10-29 03:43:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:43:51,699 INFO L225 Difference]: With dead ends: 112 [2020-10-29 03:43:51,699 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 03:43:51,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2020-10-29 03:43:51,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 03:43:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 46. [2020-10-29 03:43:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 03:43:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-29 03:43:51,708 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 44 [2020-10-29 03:43:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:43:51,708 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-29 03:43:51,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:43:51,708 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-29 03:43:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:43:51,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:43:51,709 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:43:51,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:43:51,709 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:43:51,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:43:51,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1505194436, now seen corresponding path program 18 times [2020-10-29 03:43:51,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:43:51,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046588730] [2020-10-29 03:43:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:43:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:51,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:51,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:51,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:51,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:51,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:55,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:56,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:56,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 03:43:56,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:43:56,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:43:56,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:56,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:56,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 03:43:56,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:43:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 03:43:56,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:57,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:43:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:57,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:57,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:43:57,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:43:57,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:43:57,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:43:57,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:43:57,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:43:57,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:43:57,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:43:57,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:43:57,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:43:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:43:57,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046588730] [2020-10-29 03:43:57,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:43:57,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 03:43:57,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579488049] [2020-10-29 03:43:57,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 03:43:57,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:43:57,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 03:43:57,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:43:57,480 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 27 states. [2020-10-29 03:43:58,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:43:58,402 INFO L93 Difference]: Finished difference Result 116 states and 174 transitions. [2020-10-29 03:43:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:43:58,402 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-10-29 03:43:58,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:43:58,404 INFO L225 Difference]: With dead ends: 116 [2020-10-29 03:43:58,404 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 03:43:58,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:43:58,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 03:43:58,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 47. [2020-10-29 03:43:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 03:43:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-29 03:43:58,419 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 45 [2020-10-29 03:43:58,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:43:58,419 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-29 03:43:58,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 03:43:58,419 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-29 03:43:58,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 03:43:58,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:43:58,420 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:43:58,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:43:58,420 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:43:58,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:43:58,421 INFO L82 PathProgramCache]: Analyzing trace with hash 99376606, now seen corresponding path program 19 times [2020-10-29 03:43:58,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:43:58,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630979086] [2020-10-29 03:43:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:43:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:43:58,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:58,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:58,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:58,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:43:58,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:01,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:03,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:03,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 03:44:03,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:44:03,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:44:03,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:03,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 03:44:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:44:03,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 03:44:03,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:04,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:44:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:04,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:04,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:04,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:44:04,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:44:04,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:44:04,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:04,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:04,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:44:04,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:44:04,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:44:04,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:44:04,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630979086] [2020-10-29 03:44:04,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:44:04,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 03:44:04,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558999010] [2020-10-29 03:44:04,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 03:44:04,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:44:05,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 03:44:05,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:44:05,000 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 28 states. [2020-10-29 03:44:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:44:05,881 INFO L93 Difference]: Finished difference Result 120 states and 181 transitions. [2020-10-29 03:44:05,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 03:44:05,881 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2020-10-29 03:44:05,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:44:05,883 INFO L225 Difference]: With dead ends: 120 [2020-10-29 03:44:05,883 INFO L226 Difference]: Without dead ends: 111 [2020-10-29 03:44:05,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=343, Invalid=713, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:44:05,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-29 03:44:05,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 48. [2020-10-29 03:44:05,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 03:44:05,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-29 03:44:05,893 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 46 [2020-10-29 03:44:05,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:44:05,893 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-29 03:44:05,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 03:44:05,893 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-29 03:44:05,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:44:05,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:44:05,894 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:44:05,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:44:05,894 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:44:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:44:05,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1698528644, now seen corresponding path program 20 times [2020-10-29 03:44:05,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:44:05,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232440275] [2020-10-29 03:44:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:44:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:05,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:05,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:05,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:05,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:06,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:08,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:10,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:10,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:44:10,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:44:10,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:44:10,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:10,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:10,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 03:44:10,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:44:10,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 03:44:10,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:12,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:44:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:12,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:12,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:12,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:44:12,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:44:12,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:44:12,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:12,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:12,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:44:12,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:44:12,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:44:12,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:44:12,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232440275] [2020-10-29 03:44:12,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:44:12,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 03:44:12,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490256839] [2020-10-29 03:44:12,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 03:44:12,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:44:12,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 03:44:12,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=527, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:44:12,490 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 29 states. [2020-10-29 03:44:13,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:44:13,476 INFO L93 Difference]: Finished difference Result 124 states and 188 transitions. [2020-10-29 03:44:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 03:44:13,480 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 47 [2020-10-29 03:44:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:44:13,481 INFO L225 Difference]: With dead ends: 124 [2020-10-29 03:44:13,481 INFO L226 Difference]: Without dead ends: 115 [2020-10-29 03:44:13,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:44:13,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-29 03:44:13,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 49. [2020-10-29 03:44:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 03:44:13,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-29 03:44:13,491 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 47 [2020-10-29 03:44:13,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:44:13,491 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-29 03:44:13,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 03:44:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-29 03:44:13,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 03:44:13,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:44:13,492 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:44:13,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 03:44:13,493 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:44:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:44:13,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1599016546, now seen corresponding path program 21 times [2020-10-29 03:44:13,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:44:13,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223914066] [2020-10-29 03:44:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:44:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:13,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:13,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:13,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:13,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:13,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:17,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:18,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:18,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 03:44:18,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:44:18,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:44:18,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:18,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 03:44:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:44:18,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 03:44:18,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:20,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:44:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:20,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:20,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:20,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:44:20,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:44:20,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:44:20,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:20,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:20,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:44:20,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:44:20,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:44:20,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:44:20,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223914066] [2020-10-29 03:44:20,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:44:20,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 03:44:20,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562546044] [2020-10-29 03:44:20,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 03:44:20,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:44:20,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 03:44:20,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=561, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:44:20,308 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 30 states. [2020-10-29 03:44:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:44:21,325 INFO L93 Difference]: Finished difference Result 128 states and 195 transitions. [2020-10-29 03:44:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 03:44:21,326 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 48 [2020-10-29 03:44:21,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:44:21,327 INFO L225 Difference]: With dead ends: 128 [2020-10-29 03:44:21,327 INFO L226 Difference]: Without dead ends: 119 [2020-10-29 03:44:21,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=396, Invalid=794, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 03:44:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-29 03:44:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 50. [2020-10-29 03:44:21,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 03:44:21,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-29 03:44:21,338 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 48 [2020-10-29 03:44:21,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:44:21,339 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-29 03:44:21,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 03:44:21,339 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-29 03:44:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 03:44:21,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:44:21,340 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:44:21,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 03:44:21,340 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:44:21,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:44:21,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1485858492, now seen corresponding path program 22 times [2020-10-29 03:44:21,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:44:21,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920489086] [2020-10-29 03:44:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:44:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:21,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:21,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:21,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:21,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:21,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:24,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:26,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:26,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 03:44:26,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:44:26,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:44:26,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:26,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:26,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 03:44:26,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 03:44:26,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:44:26,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:26,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:44:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:26,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:26,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:26,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:44:26,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:44:26,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:44:26,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:26,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:26,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:44:26,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:44:26,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:44:26,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:44:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:44:26,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920489086] [2020-10-29 03:44:26,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:44:26,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 03:44:26,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148362470] [2020-10-29 03:44:26,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 03:44:26,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:44:26,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 03:44:26,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:44:26,970 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 26 states. [2020-10-29 03:44:27,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:44:27,649 INFO L93 Difference]: Finished difference Result 181 states and 277 transitions. [2020-10-29 03:44:27,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 03:44:27,650 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 49 [2020-10-29 03:44:27,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:44:27,651 INFO L225 Difference]: With dead ends: 181 [2020-10-29 03:44:27,651 INFO L226 Difference]: Without dead ends: 139 [2020-10-29 03:44:27,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:44:27,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-29 03:44:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-29 03:44:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-29 03:44:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2020-10-29 03:44:27,743 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 49 [2020-10-29 03:44:27,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:44:27,743 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2020-10-29 03:44:27,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 03:44:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2020-10-29 03:44:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-29 03:44:27,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:44:27,745 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:44:27,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 03:44:27,745 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:44:27,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:44:27,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1221812322, now seen corresponding path program 23 times [2020-10-29 03:44:27,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:44:27,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328025411] [2020-10-29 03:44:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:44:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:27,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:27,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:28,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:29,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:32,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:32,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-29 03:44:32,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:44:32,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:44:32,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:32,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:32,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 03:44:32,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-29 03:44:32,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 03:44:32,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:33,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:44:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:33,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:33,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:33,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:44:33,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:44:33,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:44:33,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:33,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:33,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:44:33,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:44:33,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:44:33,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-10-29 03:44:33,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328025411] [2020-10-29 03:44:33,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:44:33,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 03:44:33,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894058527] [2020-10-29 03:44:33,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 03:44:33,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:44:33,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 03:44:33,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:44:33,360 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand 27 states. [2020-10-29 03:44:33,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:44:33,837 INFO L93 Difference]: Finished difference Result 253 states and 265 transitions. [2020-10-29 03:44:33,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 03:44:33,837 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 138 [2020-10-29 03:44:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:44:33,839 INFO L225 Difference]: With dead ends: 253 [2020-10-29 03:44:33,839 INFO L226 Difference]: Without dead ends: 144 [2020-10-29 03:44:33,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:44:33,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-29 03:44:33,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-29 03:44:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-29 03:44:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2020-10-29 03:44:33,918 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 138 [2020-10-29 03:44:33,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:44:33,918 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2020-10-29 03:44:33,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 03:44:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2020-10-29 03:44:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-29 03:44:33,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:44:33,919 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:44:33,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 03:44:33,919 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:44:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:44:33,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1049503042, now seen corresponding path program 24 times [2020-10-29 03:44:33,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:44:33,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67579588] [2020-10-29 03:44:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:44:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:33,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:34,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:34,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:35,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:38,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:38,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-29 03:44:38,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:44:38,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-29 03:44:38,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:38,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:38,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 03:44:38,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-29 03:44:38,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:44:38,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:39,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:44:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:39,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:39,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:39,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:44:39,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:44:39,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:44:39,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:39,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:39,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:44:39,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:44:39,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:44:39,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-10-29 03:44:39,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67579588] [2020-10-29 03:44:39,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:44:39,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 03:44:39,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437778222] [2020-10-29 03:44:39,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 03:44:39,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:44:39,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 03:44:39,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:44:39,662 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 28 states. [2020-10-29 03:44:40,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:44:40,233 INFO L93 Difference]: Finished difference Result 262 states and 274 transitions. [2020-10-29 03:44:40,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:44:40,234 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 143 [2020-10-29 03:44:40,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:44:40,235 INFO L225 Difference]: With dead ends: 262 [2020-10-29 03:44:40,235 INFO L226 Difference]: Without dead ends: 149 [2020-10-29 03:44:40,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-29 03:44:40,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-29 03:44:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-10-29 03:44:40,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-29 03:44:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2020-10-29 03:44:40,304 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 143 [2020-10-29 03:44:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:44:40,304 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2020-10-29 03:44:40,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 03:44:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2020-10-29 03:44:40,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-29 03:44:40,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:44:40,305 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:44:40,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 03:44:40,305 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:44:40,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:44:40,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1865123298, now seen corresponding path program 25 times [2020-10-29 03:44:40,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:44:40,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061722018] [2020-10-29 03:44:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:44:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:40,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:40,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:40,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:41,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:45,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:45,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-29 03:44:45,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:44:45,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 03:44:45,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:45,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:45,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 03:44:45,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:44:45,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 03:44:45,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:45,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:44:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:45,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:45,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:45,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:44:45,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:44:45,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:44:45,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:45,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:44:45,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:44:45,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:44:45,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-10-29 03:44:45,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061722018] [2020-10-29 03:44:45,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:44:45,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 03:44:45,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183460785] [2020-10-29 03:44:45,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 03:44:45,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:44:45,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 03:44:45,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:44:45,973 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand 29 states. [2020-10-29 03:44:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:44:46,537 INFO L93 Difference]: Finished difference Result 271 states and 283 transitions. [2020-10-29 03:44:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 03:44:46,538 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 148 [2020-10-29 03:44:46,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:44:46,539 INFO L225 Difference]: With dead ends: 271 [2020-10-29 03:44:46,539 INFO L226 Difference]: Without dead ends: 154 [2020-10-29 03:44:46,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:44:46,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-29 03:44:46,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-29 03:44:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-29 03:44:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2020-10-29 03:44:46,605 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 148 [2020-10-29 03:44:46,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:44:46,605 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2020-10-29 03:44:46,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 03:44:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2020-10-29 03:44:46,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-29 03:44:46,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:44:46,606 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:44:46,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 03:44:46,606 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:44:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:44:46,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1282944702, now seen corresponding path program 26 times [2020-10-29 03:44:46,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:44:46,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321301756] [2020-10-29 03:44:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:44:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:46,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:46,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:46,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:47,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:51,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:51,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-29 03:44:51,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:44:51,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 03:44:51,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:51,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 03:44:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-29 03:44:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 03:44:51,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:52,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:44:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:52,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:52,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:52,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:44:52,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:44:52,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:44:52,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:52,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:52,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:44:52,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:44:52,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:44:52,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-10-29 03:44:52,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321301756] [2020-10-29 03:44:52,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:44:52,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 03:44:52,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437529253] [2020-10-29 03:44:52,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 03:44:52,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:44:52,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 03:44:52,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:44:52,306 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 30 states. [2020-10-29 03:44:52,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:44:52,925 INFO L93 Difference]: Finished difference Result 280 states and 292 transitions. [2020-10-29 03:44:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 03:44:52,926 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 153 [2020-10-29 03:44:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:44:52,927 INFO L225 Difference]: With dead ends: 280 [2020-10-29 03:44:52,927 INFO L226 Difference]: Without dead ends: 159 [2020-10-29 03:44:52,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-29 03:44:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-29 03:44:53,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2020-10-29 03:44:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-29 03:44:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2020-10-29 03:44:53,017 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 153 [2020-10-29 03:44:53,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:44:53,017 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2020-10-29 03:44:53,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 03:44:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2020-10-29 03:44:53,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-29 03:44:53,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:44:53,018 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:44:53,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 03:44:53,019 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:44:53,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:44:53,019 INFO L82 PathProgramCache]: Analyzing trace with hash -99666786, now seen corresponding path program 27 times [2020-10-29 03:44:53,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:44:53,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238930634] [2020-10-29 03:44:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:44:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:53,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:53,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:53,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:54,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:58,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:58,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-29 03:44:58,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:44:58,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:44:58,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:58,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:58,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 03:44:58,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:44:58,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 03:44:58,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:58,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:44:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:58,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:58,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:44:58,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:44:58,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:44:58,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:44:58,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:44:58,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:44:58,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:44:58,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:44:58,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:44:58,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:44:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-10-29 03:44:58,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238930634] [2020-10-29 03:44:58,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:44:58,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 03:44:58,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741951695] [2020-10-29 03:44:58,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 03:44:58,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:44:58,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 03:44:58,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-29 03:44:58,766 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand 31 states. [2020-10-29 03:44:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:44:59,354 INFO L93 Difference]: Finished difference Result 289 states and 301 transitions. [2020-10-29 03:44:59,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 03:44:59,355 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 158 [2020-10-29 03:44:59,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:44:59,356 INFO L225 Difference]: With dead ends: 289 [2020-10-29 03:44:59,356 INFO L226 Difference]: Without dead ends: 164 [2020-10-29 03:44:59,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-29 03:44:59,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-29 03:44:59,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2020-10-29 03:44:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-29 03:44:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2020-10-29 03:44:59,427 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 158 [2020-10-29 03:44:59,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:44:59,427 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2020-10-29 03:44:59,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 03:44:59,428 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2020-10-29 03:44:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-29 03:44:59,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:44:59,429 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:44:59,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 03:44:59,429 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:44:59,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:44:59,429 INFO L82 PathProgramCache]: Analyzing trace with hash -345578818, now seen corresponding path program 28 times [2020-10-29 03:44:59,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:44:59,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221792089] [2020-10-29 03:44:59,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:44:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:44:59,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:59,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:44:59,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:00,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:04,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:45:04,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-29 03:45:04,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:45:04,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 03:45:04,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:45:04,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:45:04,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 03:45:04,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 03:45:04,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 03:45:04,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:45:05,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:45:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:45:05,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:05,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:45:05,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:45:05,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:45:05,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:45:05,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:45:05,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:45:05,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:45:05,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:45:05,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:45:05,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:45:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-10-29 03:45:05,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221792089] [2020-10-29 03:45:05,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:45:05,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 03:45:05,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612918642] [2020-10-29 03:45:05,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 03:45:05,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:45:05,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 03:45:05,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:45:05,236 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 32 states. [2020-10-29 03:45:05,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:45:05,861 INFO L93 Difference]: Finished difference Result 298 states and 310 transitions. [2020-10-29 03:45:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 03:45:05,862 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 163 [2020-10-29 03:45:05,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:45:05,863 INFO L225 Difference]: With dead ends: 298 [2020-10-29 03:45:05,863 INFO L226 Difference]: Without dead ends: 169 [2020-10-29 03:45:05,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-29 03:45:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-29 03:45:05,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-29 03:45:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-29 03:45:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2020-10-29 03:45:05,941 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 163 [2020-10-29 03:45:05,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:45:05,942 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2020-10-29 03:45:05,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 03:45:05,942 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2020-10-29 03:45:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-29 03:45:05,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:45:05,943 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:45:05,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 03:45:05,943 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:45:05,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:45:05,944 INFO L82 PathProgramCache]: Analyzing trace with hash -221196514, now seen corresponding path program 29 times [2020-10-29 03:45:05,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:45:05,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539200537] [2020-10-29 03:45:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:45:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:45:06,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:06,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:06,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:07,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:11,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:45:11,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-29 03:45:11,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:45:11,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-29 03:45:11,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:45:11,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:45:11,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 03:45:11,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-29 03:45:11,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 03:45:11,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:45:11,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:45:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:45:11,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:11,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:45:11,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:45:11,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:45:11,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:45:11,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:45:11,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:45:11,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:45:11,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:45:11,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:45:11,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:45:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-10-29 03:45:11,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539200537] [2020-10-29 03:45:11,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:45:11,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 03:45:11,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762582203] [2020-10-29 03:45:11,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 03:45:11,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:45:11,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 03:45:11,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:45:11,808 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand 33 states. [2020-10-29 03:45:12,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:45:12,466 INFO L93 Difference]: Finished difference Result 307 states and 319 transitions. [2020-10-29 03:45:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 03:45:12,468 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 168 [2020-10-29 03:45:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:45:12,469 INFO L225 Difference]: With dead ends: 307 [2020-10-29 03:45:12,470 INFO L226 Difference]: Without dead ends: 174 [2020-10-29 03:45:12,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:45:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-29 03:45:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2020-10-29 03:45:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-29 03:45:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2020-10-29 03:45:12,596 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 168 [2020-10-29 03:45:12,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:45:12,596 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2020-10-29 03:45:12,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 03:45:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2020-10-29 03:45:12,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-29 03:45:12,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:45:12,598 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:45:12,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 03:45:12,598 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:45:12,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:45:12,599 INFO L82 PathProgramCache]: Analyzing trace with hash 959051454, now seen corresponding path program 30 times [2020-10-29 03:45:12,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:45:12,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477485155] [2020-10-29 03:45:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:45:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:45:12,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:12,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:13,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:14,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:17,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:45:17,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-29 03:45:17,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:45:17,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:45:17,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:45:17,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:45:17,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 03:45:17,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-29 03:45:17,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 03:45:17,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:45:18,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:45:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:45:18,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:18,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:45:18,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:45:18,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:45:18,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:45:18,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:45:18,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:45:18,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:45:18,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:45:18,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:45:18,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:45:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-10-29 03:45:18,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477485155] [2020-10-29 03:45:18,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:45:18,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 03:45:18,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105662000] [2020-10-29 03:45:18,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 03:45:18,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:45:18,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 03:45:18,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:45:18,512 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 34 states. [2020-10-29 03:45:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:45:19,184 INFO L93 Difference]: Finished difference Result 316 states and 328 transitions. [2020-10-29 03:45:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 03:45:19,185 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 173 [2020-10-29 03:45:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:45:19,186 INFO L225 Difference]: With dead ends: 316 [2020-10-29 03:45:19,186 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 03:45:19,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 03:45:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 03:45:19,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-10-29 03:45:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-29 03:45:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 183 transitions. [2020-10-29 03:45:19,303 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 183 transitions. Word has length 173 [2020-10-29 03:45:19,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:45:19,303 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 183 transitions. [2020-10-29 03:45:19,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 03:45:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 183 transitions. [2020-10-29 03:45:19,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-29 03:45:19,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:45:19,305 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:45:19,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 03:45:19,305 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:45:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:45:19,305 INFO L82 PathProgramCache]: Analyzing trace with hash 990726558, now seen corresponding path program 31 times [2020-10-29 03:45:19,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:45:19,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302138702] [2020-10-29 03:45:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:45:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:45:19,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:19,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:19,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:21,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:24,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:45:24,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-29 03:45:24,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:45:24,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 03:45:24,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:45:24,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:45:24,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 03:45:24,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-29 03:45:24,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 03:45:24,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:45:25,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:45:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:45:25,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:25,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:45:25,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:45:25,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:45:25,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:45:25,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:45:25,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:45:25,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:45:25,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:45:25,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:45:25,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:45:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-10-29 03:45:25,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302138702] [2020-10-29 03:45:25,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:45:25,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 03:45:25,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817584249] [2020-10-29 03:45:25,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 03:45:25,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:45:25,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 03:45:25,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 03:45:25,254 INFO L87 Difference]: Start difference. First operand 179 states and 183 transitions. Second operand 35 states. [2020-10-29 03:45:25,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:45:25,976 INFO L93 Difference]: Finished difference Result 325 states and 337 transitions. [2020-10-29 03:45:25,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 03:45:25,977 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 178 [2020-10-29 03:45:25,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:45:25,978 INFO L225 Difference]: With dead ends: 325 [2020-10-29 03:45:25,978 INFO L226 Difference]: Without dead ends: 184 [2020-10-29 03:45:25,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 03:45:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-29 03:45:26,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-29 03:45:26,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-29 03:45:26,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2020-10-29 03:45:26,114 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 178 [2020-10-29 03:45:26,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:45:26,114 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2020-10-29 03:45:26,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 03:45:26,114 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2020-10-29 03:45:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-29 03:45:26,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:45:26,116 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:45:26,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 03:45:26,116 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:45:26,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:45:26,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2136118594, now seen corresponding path program 32 times [2020-10-29 03:45:26,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:45:26,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84442902] [2020-10-29 03:45:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:45:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:45:26,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:26,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:26,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:28,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:31,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:45:31,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-29 03:45:31,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:45:31,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 03:45:31,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:45:31,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:45:31,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 03:45:31,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-29 03:45:31,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:45:31,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:45:32,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:45:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:45:32,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:32,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:45:32,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:45:32,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:45:32,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:45:32,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:45:32,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:45:32,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:45:32,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:45:32,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:45:32,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:45:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-10-29 03:45:32,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84442902] [2020-10-29 03:45:32,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:45:32,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 03:45:32,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625406144] [2020-10-29 03:45:32,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 03:45:32,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:45:32,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 03:45:32,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 03:45:32,124 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 36 states. [2020-10-29 03:45:32,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:45:32,841 INFO L93 Difference]: Finished difference Result 334 states and 346 transitions. [2020-10-29 03:45:32,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 03:45:32,842 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 183 [2020-10-29 03:45:32,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:45:32,843 INFO L225 Difference]: With dead ends: 334 [2020-10-29 03:45:32,844 INFO L226 Difference]: Without dead ends: 189 [2020-10-29 03:45:32,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 03:45:32,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-29 03:45:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2020-10-29 03:45:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-29 03:45:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2020-10-29 03:45:32,944 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 183 [2020-10-29 03:45:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:45:32,944 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2020-10-29 03:45:32,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 03:45:32,944 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2020-10-29 03:45:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-29 03:45:32,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:45:32,946 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:45:32,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 03:45:32,946 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:45:32,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:45:32,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1833393122, now seen corresponding path program 33 times [2020-10-29 03:45:32,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:45:32,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121005373] [2020-10-29 03:45:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:45:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:45:33,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:33,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:33,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:35,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:38,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:45:38,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-29 03:45:38,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:45:38,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 03:45:38,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:45:38,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:45:38,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 03:45:38,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-29 03:45:38,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 03:45:38,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:45:39,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:45:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:45:39,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:45:39,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:45:39,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:45:39,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:45:39,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 03:45:39,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:45:39,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:45:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:45:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:45:39,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:45:39,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:45:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-10-29 03:45:39,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121005373] [2020-10-29 03:45:39,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:45:39,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 03:45:39,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127219927] [2020-10-29 03:45:39,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 03:45:39,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:45:39,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 03:45:39,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:45:39,124 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand 37 states. [2020-10-29 03:45:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:45:39,833 INFO L93 Difference]: Finished difference Result 343 states and 355 transitions. [2020-10-29 03:45:39,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 03:45:39,834 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 188 [2020-10-29 03:45:39,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:45:39,836 INFO L225 Difference]: With dead ends: 343 [2020-10-29 03:45:39,836 INFO L226 Difference]: Without dead ends: 194 [2020-10-29 03:45:39,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:45:39,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-29 03:45:39,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2020-10-29 03:45:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-29 03:45:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2020-10-29 03:45:39,984 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 188 [2020-10-29 03:45:39,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:45:39,984 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2020-10-29 03:45:39,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 03:45:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2020-10-29 03:45:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-29 03:45:39,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:45:39,986 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:45:39,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 03:45:39,987 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:45:39,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:45:39,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2094874302, now seen corresponding path program 34 times [2020-10-29 03:45:39,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:45:39,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547791847] [2020-10-29 03:45:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:45:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:45:40,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking...