/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=SHALLOWEST --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_minInArray_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:26:13,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:26:13,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:26:13,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:26:13,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:26:13,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:26:13,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:26:13,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:26:13,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:26:13,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:26:13,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:26:13,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:26:13,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:26:13,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:26:13,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:26:13,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:26:13,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:26:13,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:26:13,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:26:13,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:26:13,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:26:13,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:26:13,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:26:13,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:26:13,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:26:13,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:26:13,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:26:13,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:26:13,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:26:13,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:26:13,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:26:13,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:26:13,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:26:13,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:26:13,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:26:13,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:26:13,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:26:13,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:26:13,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:26:13,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:26:13,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:26:13,242 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 [2020-10-26 19:26:13,269 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:26:13,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:26:13,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:26:13,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:26:13,271 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:26:13,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:26:13,271 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:26:13,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:26:13,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:26:13,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:26:13,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:26:13,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:26:13,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:26:13,273 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:26:13,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:26:13,273 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:26:13,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:26:13,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:26:13,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:26:13,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:26:13,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:26:13,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:26:13,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:26:13,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:26:13,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:26:13,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:26:13,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:26:13,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:26:13,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:26:13,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:26:13,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:26:13,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:26:13,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:26:13,673 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:26:13,674 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:26:13,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-1.i [2020-10-26 19:26:13,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/873f11225/bc6bda03fc8f4b539f33fc075beb5bc4/FLAG4f6484cd8 [2020-10-26 19:26:14,344 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:26:14,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_minInArray_ground-1.i [2020-10-26 19:26:14,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/873f11225/bc6bda03fc8f4b539f33fc075beb5bc4/FLAG4f6484cd8 [2020-10-26 19:26:14,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/873f11225/bc6bda03fc8f4b539f33fc075beb5bc4 [2020-10-26 19:26:14,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:26:14,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:26:14,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:26:14,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:26:14,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:26:14,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:26:14" (1/1) ... [2020-10-26 19:26:14,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@450e6c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:14, skipping insertion in model container [2020-10-26 19:26:14,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:26:14" (1/1) ... [2020-10-26 19:26:14,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:26:14,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:26:14,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:26:14,987 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:26:15,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:26:15,024 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:26:15,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:15 WrapperNode [2020-10-26 19:26:15,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:26:15,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:26:15,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:26:15,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:26:15,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:15" (1/1) ... [2020-10-26 19:26:15,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:15" (1/1) ... [2020-10-26 19:26:15,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:15" (1/1) ... [2020-10-26 19:26:15,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:15" (1/1) ... [2020-10-26 19:26:15,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:15" (1/1) ... [2020-10-26 19:26:15,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:15" (1/1) ... [2020-10-26 19:26:15,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:15" (1/1) ... [2020-10-26 19:26:15,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:26:15,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:26:15,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:26:15,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:26:15,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:15" (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 [2020-10-26 19:26:15,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:26:15,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:26:15,140 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:26:15,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:26:15,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:26:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:26:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:26:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:26:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:26:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:26:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:26:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:26:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:26:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:26:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:26:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:26:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:26:15,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:26:15,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:26:15,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:26:15,448 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:26:15,449 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:26:15,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:26:15 BoogieIcfgContainer [2020-10-26 19:26:15,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:26:15,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:26:15,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:26:15,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:26:15,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:26:14" (1/3) ... [2020-10-26 19:26:15,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee5e046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:26:15, skipping insertion in model container [2020-10-26 19:26:15,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:26:15" (2/3) ... [2020-10-26 19:26:15,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ee5e046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:26:15, skipping insertion in model container [2020-10-26 19:26:15,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:26:15" (3/3) ... [2020-10-26 19:26:15,460 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-1.i [2020-10-26 19:26:15,472 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:26:15,476 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:26:15,491 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:26:15,520 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:26:15,520 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:26:15,520 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:26:15,520 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:26:15,521 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:26:15,521 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:26:15,521 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:26:15,521 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:26:15,564 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-26 19:26:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:26:15,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:15,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:15,571 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:15,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:15,577 INFO L82 PathProgramCache]: Analyzing trace with hash -368075238, now seen corresponding path program 1 times [2020-10-26 19:26:15,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:15,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086132395] [2020-10-26 19:26:15,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:15,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:15,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:15,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:15,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:26:15,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:15,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-26 19:26:15,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:15,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:15,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:26:15,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:15,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:26:16,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:16,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:16,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:16,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:16,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:16,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:26:16,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:16,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:16,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:16,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:16,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:16,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086132395] [2020-10-26 19:26:16,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:26:16,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:26:16,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334664669] [2020-10-26 19:26:16,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:26:16,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:16,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:26:16,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:26:16,093 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-26 19:26:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:16,221 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2020-10-26 19:26:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:26:16,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-26 19:26:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:16,231 INFO L225 Difference]: With dead ends: 55 [2020-10-26 19:26:16,232 INFO L226 Difference]: Without dead ends: 25 [2020-10-26 19:26:16,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:26:16,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-26 19:26:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-26 19:26:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 19:26:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-26 19:26:16,277 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-26 19:26:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:16,278 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-26 19:26:16,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:26:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-26 19:26:16,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:26:16,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:16,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:16,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:26:16,280 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:16,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:16,281 INFO L82 PathProgramCache]: Analyzing trace with hash 230860937, now seen corresponding path program 1 times [2020-10-26 19:26:16,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:16,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590255375] [2020-10-26 19:26:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:16,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:16,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:16,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:16,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:26:16,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:16,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-26 19:26:16,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:16,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:26:16,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:16,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:26:16,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:16,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:16,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:16,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:16,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:16,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:16,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:26:16,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:16,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:16,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:16,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:16,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:16,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590255375] [2020-10-26 19:26:16,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:26:16,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:26:16,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809490072] [2020-10-26 19:26:16,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:26:16,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:16,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:26:16,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:26:16,633 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-10-26 19:26:16,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:16,761 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-26 19:26:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:26:16,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:26:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:16,764 INFO L225 Difference]: With dead ends: 44 [2020-10-26 19:26:16,764 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 19:26:16,765 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 [2020-10-26 19:26:16,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 19:26:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-26 19:26:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-26 19:26:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-26 19:26:16,774 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2020-10-26 19:26:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:16,774 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-26 19:26:16,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:26:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-26 19:26:16,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:26:16,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:16,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:16,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:26:16,776 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:16,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:16,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1800786073, now seen corresponding path program 1 times [2020-10-26 19:26:16,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:16,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023711191] [2020-10-26 19:26:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:16,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:16,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:17,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:17,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:26:17,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:17,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-26 19:26:17,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:17,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:26:17,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:17,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:26:17,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:17,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:17,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:17,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:17,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:17,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:17,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:26:17,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:17,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:17,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:17,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:17,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:26:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:17,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023711191] [2020-10-26 19:26:17,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:17,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:26:17,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753991379] [2020-10-26 19:26:17,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:26:17,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:17,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:26:17,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:26:17,225 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-10-26 19:26:17,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:17,376 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-10-26 19:26:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:26:17,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-26 19:26:17,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:17,378 INFO L225 Difference]: With dead ends: 46 [2020-10-26 19:26:17,379 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 19:26:17,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:26:17,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 19:26:17,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-26 19:26:17,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:26:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-26 19:26:17,392 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2020-10-26 19:26:17,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:17,394 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-26 19:26:17,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:26:17,394 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-26 19:26:17,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:26:17,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:17,395 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:17,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:26:17,396 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:17,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:17,398 INFO L82 PathProgramCache]: Analyzing trace with hash -3443003, now seen corresponding path program 2 times [2020-10-26 19:26:17,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:17,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648084698] [2020-10-26 19:26:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:17,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:17,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:17,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:17,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:26:17,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:17,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-26 19:26:17,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:17,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:26:17,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:17,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:26:17,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:17,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:17,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:17,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:17,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:17,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:17,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:26:17,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:17,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:17,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:17,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:17,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:17,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648084698] [2020-10-26 19:26:17,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:17,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:26:17,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726355152] [2020-10-26 19:26:17,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:26:17,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:17,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:26:17,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:26:17,762 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 6 states. [2020-10-26 19:26:17,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:17,908 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-26 19:26:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:26:17,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-26 19:26:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:17,910 INFO L225 Difference]: With dead ends: 48 [2020-10-26 19:26:17,910 INFO L226 Difference]: Without dead ends: 31 [2020-10-26 19:26:17,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:26:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-26 19:26:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-26 19:26:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:26:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-26 19:26:17,918 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-10-26 19:26:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:17,918 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-26 19:26:17,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:26:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-26 19:26:17,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:26:17,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:17,919 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:17,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:26:17,920 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:17,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:17,920 INFO L82 PathProgramCache]: Analyzing trace with hash 666394275, now seen corresponding path program 3 times [2020-10-26 19:26:17,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:17,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92571632] [2020-10-26 19:26:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:17,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:17,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:18,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:18,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:26:18,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:18,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-26 19:26:18,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:18,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:26:18,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:18,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:26:18,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:18,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:18,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:18,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:18,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:18,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:18,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:18,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:18,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:18,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:18,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:18,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:18,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92571632] [2020-10-26 19:26:18,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:18,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:26:18,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110133831] [2020-10-26 19:26:18,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:26:18,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:18,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:26:18,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:26:18,254 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 7 states. [2020-10-26 19:26:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:18,382 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-26 19:26:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:26:18,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-26 19:26:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:18,384 INFO L225 Difference]: With dead ends: 50 [2020-10-26 19:26:18,384 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 19:26:18,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:26:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 19:26:18,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-26 19:26:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:26:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-26 19:26:18,391 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2020-10-26 19:26:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:18,392 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-26 19:26:18,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:26:18,392 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-26 19:26:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:26:18,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:18,393 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:18,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:26:18,393 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:18,394 INFO L82 PathProgramCache]: Analyzing trace with hash 134924033, now seen corresponding path program 4 times [2020-10-26 19:26:18,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:18,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267920895] [2020-10-26 19:26:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:18,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:18,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:18,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:18,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:26:18,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:18,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-26 19:26:18,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:18,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:26:18,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:18,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:26:18,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:18,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:18,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:18,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:18,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:18,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:18,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:26:18,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:18,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:18,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:18,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:18,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:18,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267920895] [2020-10-26 19:26:18,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:18,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:26:18,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70523871] [2020-10-26 19:26:18,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:26:18,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:18,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:26:18,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:26:18,846 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-10-26 19:26:19,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:19,020 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-26 19:26:19,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:26:19,022 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-26 19:26:19,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:19,024 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:26:19,024 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 19:26:19,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:26:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 19:26:19,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-26 19:26:19,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:26:19,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-26 19:26:19,037 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2020-10-26 19:26:19,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:19,038 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-26 19:26:19,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:26:19,038 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-26 19:26:19,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:26:19,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:19,039 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:19,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:26:19,040 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:19,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:19,041 INFO L82 PathProgramCache]: Analyzing trace with hash 493129695, now seen corresponding path program 5 times [2020-10-26 19:26:19,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:19,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282425848] [2020-10-26 19:26:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:19,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:19,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:26:19,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:19,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-26 19:26:19,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:19,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:26:19,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:19,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:26:19,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:19,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:19,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:19,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:19,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:19,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:19,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:19,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:19,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:19,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:19,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282425848] [2020-10-26 19:26:19,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:19,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:26:19,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028703393] [2020-10-26 19:26:19,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:26:19,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:19,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:26:19,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:26:19,493 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 9 states. [2020-10-26 19:26:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:19,647 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-26 19:26:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:26:19,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-26 19:26:19,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:19,649 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:26:19,649 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 19:26:19,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:26:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 19:26:19,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-26 19:26:19,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:26:19,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-26 19:26:19,657 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 27 [2020-10-26 19:26:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:19,657 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-26 19:26:19,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:26:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-26 19:26:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:26:19,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:19,658 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:19,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:26:19,659 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:19,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:19,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1131387197, now seen corresponding path program 6 times [2020-10-26 19:26:19,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:19,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759356486] [2020-10-26 19:26:19,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:19,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:20,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:26:20,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:20,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-26 19:26:20,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:20,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:26:20,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:20,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:26:20,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:20,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:20,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:20,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:20,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:20,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:20,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:20,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:20,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:20,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:20,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:20,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759356486] [2020-10-26 19:26:20,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:20,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:26:20,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306587712] [2020-10-26 19:26:20,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:26:20,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:20,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:26:20,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:26:20,214 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2020-10-26 19:26:20,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:20,404 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-26 19:26:20,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:26:20,405 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-26 19:26:20,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:20,406 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:26:20,406 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:26:20,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:26:20,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:26:20,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-26 19:26:20,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:26:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-26 19:26:20,414 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 29 [2020-10-26 19:26:20,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:20,415 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-26 19:26:20,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:26:20,415 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-26 19:26:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:26:20,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:20,416 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:20,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:26:20,416 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:20,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:20,417 INFO L82 PathProgramCache]: Analyzing trace with hash 316523291, now seen corresponding path program 7 times [2020-10-26 19:26:20,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:20,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972955376] [2020-10-26 19:26:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:20,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:20,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:26:20,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:20,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-26 19:26:20,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:20,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:26:20,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:20,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:26:20,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:21,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:21,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:21,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:21,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:21,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:21,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:21,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:21,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:21,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972955376] [2020-10-26 19:26:21,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:21,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:26:21,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656575257] [2020-10-26 19:26:21,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:26:21,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:21,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:26:21,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:26:21,046 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 11 states. [2020-10-26 19:26:21,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:21,186 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-26 19:26:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:26:21,187 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-26 19:26:21,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:21,188 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:26:21,188 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:26:21,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:26:21,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:26:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-26 19:26:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:26:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-26 19:26:21,195 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 31 [2020-10-26 19:26:21,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:21,195 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-26 19:26:21,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:26:21,196 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-26 19:26:21,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:26:21,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:21,197 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:21,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:26:21,197 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:21,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:21,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1083642503, now seen corresponding path program 8 times [2020-10-26 19:26:21,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:21,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951953157] [2020-10-26 19:26:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:21,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:21,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:21,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:21,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:26:21,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:21,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-26 19:26:21,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:21,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:26:21,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:21,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:26:21,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:22,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:22,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:22,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:22,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:22,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:22,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:22,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:22,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:22,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:22,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:22,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:26:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:22,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951953157] [2020-10-26 19:26:22,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:22,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:26:22,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975045376] [2020-10-26 19:26:22,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:26:22,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:22,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:26:22,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:26:22,093 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 12 states. [2020-10-26 19:26:22,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:22,293 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-26 19:26:22,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:26:22,294 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-26 19:26:22,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:22,295 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:26:22,295 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 19:26:22,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:26:22,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 19:26:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-26 19:26:22,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:26:22,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-26 19:26:22,308 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 33 [2020-10-26 19:26:22,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:22,309 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-26 19:26:22,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:26:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-26 19:26:22,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:26:22,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:22,313 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:22,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:26:22,313 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:22,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:22,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1976760407, now seen corresponding path program 9 times [2020-10-26 19:26:22,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:22,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424169467] [2020-10-26 19:26:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:22,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:22,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:23,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:26:23,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:23,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-10-26 19:26:23,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:23,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:26:23,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:23,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:26:23,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:23,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:23,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:23,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:23,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:23,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:23,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:23,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:23,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:23,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:23,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:23,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424169467] [2020-10-26 19:26:23,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:23,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:26:23,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628602692] [2020-10-26 19:26:23,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:26:23,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:23,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:26:23,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:26:23,430 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 13 states. [2020-10-26 19:26:23,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:23,592 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-26 19:26:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:26:23,593 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-26 19:26:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:23,594 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:26:23,594 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:26:23,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:26:23,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:26:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-26 19:26:23,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:26:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-26 19:26:23,607 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 35 [2020-10-26 19:26:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:23,608 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-26 19:26:23,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:26:23,608 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-26 19:26:23,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:26:23,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:23,612 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:23,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:26:23,612 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:23,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:23,613 INFO L82 PathProgramCache]: Analyzing trace with hash 971359157, now seen corresponding path program 10 times [2020-10-26 19:26:23,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:23,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219577828] [2020-10-26 19:26:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:23,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:23,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:24,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:24,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:26:24,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:24,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-26 19:26:24,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:24,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:26:24,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:24,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:26:24,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:24,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:24,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:24,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:24,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:24,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:24,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:24,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:24,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:24,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:24,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:24,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:24,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219577828] [2020-10-26 19:26:24,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:24,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:26:24,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286864736] [2020-10-26 19:26:24,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:26:24,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:24,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:26:24,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:24,601 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 14 states. [2020-10-26 19:26:24,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:24,821 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-26 19:26:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:26:24,822 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-26 19:26:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:24,823 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:26:24,824 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 19:26:24,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 19:26:24,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-26 19:26:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:26:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-26 19:26:24,831 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 37 [2020-10-26 19:26:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:24,832 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-26 19:26:24,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:26:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-26 19:26:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:26:24,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:24,833 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:24,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:26:24,833 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:24,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:24,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1148399507, now seen corresponding path program 11 times [2020-10-26 19:26:24,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:24,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191161977] [2020-10-26 19:26:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:24,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:24,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:25,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:26:25,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:25,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 861 [2020-10-26 19:26:25,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:25,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:26:25,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:25,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:26:25,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:25,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:25,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:25,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:25,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:25,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:26:25,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:25,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:25,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:25,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:25,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:25,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191161977] [2020-10-26 19:26:25,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:25,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:26:25,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815115927] [2020-10-26 19:26:25,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:26:25,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:25,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:26:25,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:25,984 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 15 states. [2020-10-26 19:26:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:26,127 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-26 19:26:26,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:26:26,127 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-26 19:26:26,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:26,128 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:26:26,128 INFO L226 Difference]: Without dead ends: 49 [2020-10-26 19:26:26,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-26 19:26:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-26 19:26:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:26:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-26 19:26:26,138 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 39 [2020-10-26 19:26:26,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:26,139 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-26 19:26:26,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:26:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-26 19:26:26,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:26:26,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:26,142 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:26,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:26:26,143 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:26,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:26,143 INFO L82 PathProgramCache]: Analyzing trace with hash -514515983, now seen corresponding path program 12 times [2020-10-26 19:26:26,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:26,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119119898] [2020-10-26 19:26:26,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:26,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:26,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:27,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:27,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:26:27,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:27,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 924 [2020-10-26 19:26:27,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:27,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:26:27,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:27,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:26:27,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:27,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:27,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:27,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:27,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:27,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:27,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:27,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:27,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:27,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:27,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:27,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:27,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119119898] [2020-10-26 19:26:27,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:27,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:26:27,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448450402] [2020-10-26 19:26:27,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:26:27,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:27,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:26:27,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:27,476 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 16 states. [2020-10-26 19:26:27,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:27,717 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-26 19:26:27,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:26:27,718 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-26 19:26:27,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:27,719 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:26:27,719 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:26:27,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:26:27,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-26 19:26:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:26:27,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-26 19:26:27,730 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 41 [2020-10-26 19:26:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:27,730 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-26 19:26:27,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:26:27,730 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-26 19:26:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:26:27,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:27,735 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:27,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:26:27,736 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:27,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:27,736 INFO L82 PathProgramCache]: Analyzing trace with hash -848467761, now seen corresponding path program 13 times [2020-10-26 19:26:27,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:27,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668393549] [2020-10-26 19:26:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:27,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:27,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:28,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:28,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:26:28,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:28,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 969 [2020-10-26 19:26:28,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:28,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:26:28,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:26:28,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:29,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:29,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:29,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:29,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:29,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:29,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:29,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:29,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:29,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:29,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:29,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:29,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668393549] [2020-10-26 19:26:29,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:29,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:26:29,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650648255] [2020-10-26 19:26:29,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:26:29,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:29,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:26:29,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:29,079 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 17 states. [2020-10-26 19:26:29,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:29,345 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-26 19:26:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:26:29,345 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-26 19:26:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:29,346 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:26:29,346 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:26:29,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:26:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-26 19:26:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:26:29,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-26 19:26:29,352 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 43 [2020-10-26 19:26:29,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:29,353 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-26 19:26:29,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:26:29,353 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-26 19:26:29,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:26:29,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:29,354 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:29,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:26:29,354 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:29,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:29,354 INFO L82 PathProgramCache]: Analyzing trace with hash 346420781, now seen corresponding path program 14 times [2020-10-26 19:26:29,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:29,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216761015] [2020-10-26 19:26:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:29,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:29,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:30,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:30,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:26:30,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:30,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1091 [2020-10-26 19:26:30,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:30,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:26:30,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:30,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:26:30,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:30,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:30,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:30,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:30,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:30,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:30,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:30,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:30,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:30,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:30,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216761015] [2020-10-26 19:26:30,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:30,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:26:30,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391219428] [2020-10-26 19:26:30,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:26:30,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:30,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:26:30,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:30,853 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 18 states. [2020-10-26 19:26:31,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:31,008 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-26 19:26:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:26:31,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-26 19:26:31,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:31,010 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:26:31,010 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:26:31,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:31,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:26:31,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-26 19:26:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:26:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-26 19:26:31,015 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 45 [2020-10-26 19:26:31,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:31,016 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-26 19:26:31,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:26:31,016 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-26 19:26:31,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:26:31,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:31,017 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:31,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:26:31,017 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:31,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:31,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1878041611, now seen corresponding path program 15 times [2020-10-26 19:26:31,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:31,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106207950] [2020-10-26 19:26:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:31,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:32,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:32,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:26:32,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:32,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1121 [2020-10-26 19:26:32,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:32,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:26:32,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:32,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:26:32,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:32,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:32,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:32,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:32,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:32,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:32,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:32,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:32,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:32,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:32,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:32,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:32,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106207950] [2020-10-26 19:26:32,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:32,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:26:32,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719229484] [2020-10-26 19:26:32,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:26:32,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:32,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:26:32,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:26:32,585 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 19 states. [2020-10-26 19:26:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:32,839 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-10-26 19:26:32,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:26:32,839 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-26 19:26:32,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:32,840 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:26:32,840 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:26:32,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:26:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:26:32,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-26 19:26:32,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:26:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-26 19:26:32,845 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 47 [2020-10-26 19:26:32,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:32,846 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-26 19:26:32,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:26:32,846 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-26 19:26:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:26:32,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:32,847 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:32,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:26:32,847 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:32,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:32,848 INFO L82 PathProgramCache]: Analyzing trace with hash 591876713, now seen corresponding path program 16 times [2020-10-26 19:26:32,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:32,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204488048] [2020-10-26 19:26:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:32,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:32,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:34,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:34,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:26:34,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:34,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1216 [2020-10-26 19:26:34,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:34,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:26:34,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:34,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:26:34,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:34,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:34,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:34,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:34,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:34,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:34,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:34,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:34,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:34,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:34,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:34,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:34,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204488048] [2020-10-26 19:26:34,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:34,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:26:34,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766773546] [2020-10-26 19:26:34,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:26:34,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:34,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:26:34,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:26:34,590 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 20 states. [2020-10-26 19:26:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:34,775 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-26 19:26:34,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:26:34,776 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-26 19:26:34,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:34,777 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:26:34,777 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:26:34,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:26:34,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:26:34,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-26 19:26:34,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:26:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-26 19:26:34,790 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 49 [2020-10-26 19:26:34,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:34,790 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-26 19:26:34,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:26:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-26 19:26:34,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:26:34,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:34,791 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:34,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:26:34,791 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:34,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1537990983, now seen corresponding path program 17 times [2020-10-26 19:26:34,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:34,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941212288] [2020-10-26 19:26:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:34,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:34,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:36,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:26:36,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:36,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1344 [2020-10-26 19:26:36,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:26:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:36,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:26:36,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:36,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:36,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:36,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:36,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:36,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:36,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:36,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:36,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:36,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:36,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:36,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941212288] [2020-10-26 19:26:36,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:36,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:26:36,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009719861] [2020-10-26 19:26:36,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:26:36,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:36,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:26:36,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:26:36,676 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 21 states. [2020-10-26 19:26:37,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:37,004 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-10-26 19:26:37,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:26:37,005 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-26 19:26:37,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:37,005 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:26:37,006 INFO L226 Difference]: Without dead ends: 61 [2020-10-26 19:26:37,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:26:37,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-26 19:26:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-26 19:26:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:26:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-26 19:26:37,017 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 51 [2020-10-26 19:26:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:37,018 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-26 19:26:37,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:26:37,018 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-26 19:26:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:26:37,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:37,018 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:37,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:26:37,019 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:37,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:37,019 INFO L82 PathProgramCache]: Analyzing trace with hash 220737701, now seen corresponding path program 18 times [2020-10-26 19:26:37,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:37,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769005428] [2020-10-26 19:26:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:37,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:37,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:38,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:38,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:26:38,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:38,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1489 [2020-10-26 19:26:38,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:38,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:26:38,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:38,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:26:38,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:39,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:39,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:39,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:39,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:39,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:39,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:39,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:39,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:39,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:39,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:39,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:39,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769005428] [2020-10-26 19:26:39,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:39,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:26:39,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451279500] [2020-10-26 19:26:39,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:26:39,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:39,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:26:39,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:26:39,115 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 22 states. [2020-10-26 19:26:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:39,334 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-10-26 19:26:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:26:39,335 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-26 19:26:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:39,336 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:26:39,336 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:26:39,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:26:39,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:26:39,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-26 19:26:39,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:26:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-10-26 19:26:39,342 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 53 [2020-10-26 19:26:39,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:39,343 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-10-26 19:26:39,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:26:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-10-26 19:26:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:26:39,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:39,344 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:39,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:26:39,345 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:39,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1355686019, now seen corresponding path program 19 times [2020-10-26 19:26:39,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:39,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650001464] [2020-10-26 19:26:39,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:39,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:39,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:40,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:40,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:26:40,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:40,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1570 [2020-10-26 19:26:40,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:40,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:26:40,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:40,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:26:40,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:41,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:41,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:41,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:41,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:41,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:41,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:41,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:41,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:41,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:41,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:41,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:41,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650001464] [2020-10-26 19:26:41,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:41,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:26:41,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008066431] [2020-10-26 19:26:41,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:26:41,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:41,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:26:41,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:26:41,572 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 23 states. [2020-10-26 19:26:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:41,908 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-26 19:26:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:26:41,908 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-26 19:26:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:41,909 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:26:41,909 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:26:41,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:26:41,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:26:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-26 19:26:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:26:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-26 19:26:41,915 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 55 [2020-10-26 19:26:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:41,915 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-26 19:26:41,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:26:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-26 19:26:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:26:41,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:41,916 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:41,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:26:41,916 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:41,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:41,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1119326433, now seen corresponding path program 20 times [2020-10-26 19:26:41,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:41,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826019640] [2020-10-26 19:26:41,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:41,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:41,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:43,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:43,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:26:43,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:43,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1810 [2020-10-26 19:26:43,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:43,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:26:43,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:43,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:26:43,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:44,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:44,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:44,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:44,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:44,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:44,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:44,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:44,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:44,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:44,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:44,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:44,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826019640] [2020-10-26 19:26:44,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:44,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:26:44,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569013774] [2020-10-26 19:26:44,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:26:44,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:44,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:26:44,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:26:44,385 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 24 states. [2020-10-26 19:26:44,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:44,718 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-26 19:26:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:26:44,721 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-26 19:26:44,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:44,722 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:26:44,722 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:26:44,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:26:44,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:26:44,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-26 19:26:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:26:44,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-26 19:26:44,728 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 57 [2020-10-26 19:26:44,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:44,728 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-26 19:26:44,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:26:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-26 19:26:44,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:26:44,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:44,729 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:44,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:26:44,729 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:44,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:44,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1611030975, now seen corresponding path program 21 times [2020-10-26 19:26:44,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:44,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208189003] [2020-10-26 19:26:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:44,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:44,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:46,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:46,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:26:46,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:46,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1948 [2020-10-26 19:26:46,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:26:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:46,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:26:46,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:47,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:47,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:47,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:47,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:47,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:47,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:47,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:47,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:47,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:47,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:47,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208189003] [2020-10-26 19:26:47,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:47,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:26:47,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066396614] [2020-10-26 19:26:47,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:26:47,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:47,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:26:47,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:26:47,447 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 25 states. [2020-10-26 19:26:47,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:47,806 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-10-26 19:26:47,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:26:47,807 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-26 19:26:47,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:47,808 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:26:47,808 INFO L226 Difference]: Without dead ends: 69 [2020-10-26 19:26:47,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:26:47,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-26 19:26:47,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-26 19:26:47,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:26:47,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-10-26 19:26:47,813 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 59 [2020-10-26 19:26:47,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:47,813 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-10-26 19:26:47,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:26:47,813 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-10-26 19:26:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:26:47,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:47,816 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:47,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:26:47,817 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:47,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:47,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1692693277, now seen corresponding path program 22 times [2020-10-26 19:26:47,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:47,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918116717] [2020-10-26 19:26:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:47,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:49,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:49,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:26:49,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:49,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1929 [2020-10-26 19:26:49,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:49,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:26:49,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:49,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:26:49,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:50,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:50,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:50,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:50,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:50,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:50,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:50,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:50,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:50,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918116717] [2020-10-26 19:26:50,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:50,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:26:50,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893148618] [2020-10-26 19:26:50,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:26:50,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:50,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:26:50,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:26:50,509 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 26 states. [2020-10-26 19:26:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:50,863 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-10-26 19:26:50,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:26:50,864 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-10-26 19:26:50,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:50,865 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:26:50,865 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:26:50,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:26:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:26:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-26 19:26:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:26:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-26 19:26:50,870 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 61 [2020-10-26 19:26:50,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:50,871 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-26 19:26:50,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:26:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-26 19:26:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:26:50,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:50,871 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:50,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:26:50,873 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:50,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1434213125, now seen corresponding path program 23 times [2020-10-26 19:26:50,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:50,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286514724] [2020-10-26 19:26:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:50,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:50,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:52,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:52,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:26:52,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:52,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1895 [2020-10-26 19:26:52,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:26:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:52,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:26:52,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:53,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:53,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:53,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:53,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:53,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:53,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:53,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:53,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:53,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:53,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:53,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286514724] [2020-10-26 19:26:53,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:53,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:26:53,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485014976] [2020-10-26 19:26:53,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:26:53,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:53,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:26:53,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:26:53,613 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 27 states. [2020-10-26 19:26:54,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:54,039 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-10-26 19:26:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:26:54,040 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 63 [2020-10-26 19:26:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:54,042 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:26:54,042 INFO L226 Difference]: Without dead ends: 73 [2020-10-26 19:26:54,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:26:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-26 19:26:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-26 19:26:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:26:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-26 19:26:54,048 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 63 [2020-10-26 19:26:54,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:54,048 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-26 19:26:54,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:26:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-26 19:26:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:26:54,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:54,049 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:54,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:26:54,050 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash 85841753, now seen corresponding path program 24 times [2020-10-26 19:26:54,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:54,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722359898] [2020-10-26 19:26:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:54,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:54,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:56,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:56,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:26:56,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:56,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2076 [2020-10-26 19:26:56,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:56,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:26:56,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:56,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:26:56,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:57,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:57,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:57,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:57,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:57,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:57,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:57,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:57,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:57,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:57,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:57,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:26:57,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722359898] [2020-10-26 19:26:57,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:57,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:26:57,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111631830] [2020-10-26 19:26:57,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:26:57,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:57,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:26:57,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:26:57,013 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 28 states. [2020-10-26 19:26:57,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:57,323 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-10-26 19:26:57,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:26:57,324 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-26 19:26:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:57,325 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:26:57,326 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:26:57,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:26:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:26:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-26 19:26:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:26:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-10-26 19:26:57,331 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 65 [2020-10-26 19:26:57,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:57,331 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-10-26 19:26:57,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:26:57,331 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-10-26 19:26:57,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:26:57,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:57,332 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:57,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:26:57,332 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:57,333 INFO L82 PathProgramCache]: Analyzing trace with hash 569698871, now seen corresponding path program 25 times [2020-10-26 19:26:57,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:57,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941763551] [2020-10-26 19:26:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:57,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:57,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:59,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:26:59,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:26:59,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2013 [2020-10-26 19:26:59,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:59,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:26:59,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:59,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:26:59,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:00,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:00,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:00,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:00,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:00,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:00,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:00,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:00,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:00,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:00,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:00,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:00,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941763551] [2020-10-26 19:27:00,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:00,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:27:00,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225423926] [2020-10-26 19:27:00,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:27:00,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:00,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:27:00,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:27:00,348 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 29 states. [2020-10-26 19:27:00,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:00,762 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-10-26 19:27:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:27:00,763 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-10-26 19:27:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:00,764 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:27:00,764 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:27:00,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:27:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:27:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-26 19:27:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:27:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-26 19:27:00,769 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 67 [2020-10-26 19:27:00,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:00,769 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-26 19:27:00,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:27:00,770 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-26 19:27:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:27:00,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:00,770 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:00,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:27:00,771 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:00,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:00,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1699921301, now seen corresponding path program 26 times [2020-10-26 19:27:00,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:00,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365232136] [2020-10-26 19:27:00,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:00,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:00,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:03,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:03,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:27:03,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:03,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2230 [2020-10-26 19:27:03,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:03,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:27:03,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:03,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:27:03,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:04,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:04,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:04,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:04,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:04,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:04,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:04,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:04,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:04,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:04,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:04,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:04,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365232136] [2020-10-26 19:27:04,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:04,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:27:04,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547459384] [2020-10-26 19:27:04,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:27:04,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:04,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:27:04,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:27:04,062 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 30 states. [2020-10-26 19:27:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:04,515 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-10-26 19:27:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:27:04,516 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-26 19:27:04,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:04,517 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:27:04,517 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 19:27:04,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:27:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 19:27:04,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-26 19:27:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:27:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-10-26 19:27:04,523 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 69 [2020-10-26 19:27:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:04,523 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-10-26 19:27:04,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:27:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-10-26 19:27:04,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:27:04,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:04,524 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:04,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:27:04,524 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1216950643, now seen corresponding path program 27 times [2020-10-26 19:27:04,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:04,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543814094] [2020-10-26 19:27:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:04,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:04,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:04,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:06,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:06,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:27:06,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:06,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2050 [2020-10-26 19:27:06,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:06,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:27:06,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:06,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:27:06,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:07,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:07,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:07,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:07,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:07,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:07,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:27:07,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:07,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:07,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:07,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:07,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:07,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543814094] [2020-10-26 19:27:07,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:07,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:27:07,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092454376] [2020-10-26 19:27:07,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:27:07,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:07,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:27:07,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:27:07,702 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 31 states. [2020-10-26 19:27:08,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:08,133 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-10-26 19:27:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:27:08,134 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2020-10-26 19:27:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:08,135 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:27:08,135 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:27:08,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:27:08,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:27:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-26 19:27:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:27:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-10-26 19:27:08,141 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 71 [2020-10-26 19:27:08,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:08,142 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-10-26 19:27:08,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:27:08,142 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-10-26 19:27:08,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:27:08,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:08,143 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:08,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:27:08,143 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:08,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:08,143 INFO L82 PathProgramCache]: Analyzing trace with hash 938616273, now seen corresponding path program 28 times [2020-10-26 19:27:08,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:08,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964358776] [2020-10-26 19:27:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:08,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:08,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:10,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:10,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:27:10,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:10,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2672 [2020-10-26 19:27:10,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:10,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:27:10,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:10,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:27:10,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:12,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:12,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:12,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:12,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:12,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:12,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:12,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:12,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:12,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:12,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:12,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:12,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964358776] [2020-10-26 19:27:12,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:12,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:27:12,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056781439] [2020-10-26 19:27:12,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:27:12,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:12,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:27:12,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:27:12,022 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 32 states. [2020-10-26 19:27:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:12,284 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-10-26 19:27:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:27:12,285 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-26 19:27:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:12,286 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:27:12,286 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:27:12,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:27:12,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:27:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-26 19:27:12,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:27:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-26 19:27:12,292 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 73 [2020-10-26 19:27:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:12,292 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-26 19:27:12,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:27:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-26 19:27:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:27:12,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:12,293 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:12,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:27:12,294 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:12,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:12,294 INFO L82 PathProgramCache]: Analyzing trace with hash -252740945, now seen corresponding path program 29 times [2020-10-26 19:27:12,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:12,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468755916] [2020-10-26 19:27:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:12,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:12,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:14,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:14,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:27:14,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:14,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2487 [2020-10-26 19:27:14,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:14,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:27:14,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:14,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:27:14,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:16,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:16,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:16,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:16,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:16,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:16,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:16,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:16,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:16,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:16,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:16,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:16,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468755916] [2020-10-26 19:27:16,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:16,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:27:16,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453027227] [2020-10-26 19:27:16,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:27:16,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:16,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:27:16,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:27:16,066 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 33 states. [2020-10-26 19:27:16,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:16,561 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-10-26 19:27:16,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:27:16,562 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 75 [2020-10-26 19:27:16,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:16,564 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:27:16,564 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 19:27:16,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:27:16,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 19:27:16,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-26 19:27:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:27:16,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-10-26 19:27:16,569 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 75 [2020-10-26 19:27:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:16,570 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-10-26 19:27:16,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:27:16,570 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-10-26 19:27:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:27:16,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:16,571 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:16,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:27:16,571 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:16,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:16,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1609240589, now seen corresponding path program 30 times [2020-10-26 19:27:16,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:16,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606667176] [2020-10-26 19:27:16,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:16,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:16,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:19,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:19,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:27:19,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:19,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2626 [2020-10-26 19:27:19,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:19,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:27:19,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:19,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:27:19,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:20,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:20,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:20,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:20,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:20,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:20,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:20,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:20,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:20,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606667176] [2020-10-26 19:27:20,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:20,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:27:20,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522059701] [2020-10-26 19:27:20,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:27:20,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:20,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:27:20,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:27:20,534 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 34 states. [2020-10-26 19:27:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:21,057 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-10-26 19:27:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:27:21,059 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-10-26 19:27:21,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:21,060 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:27:21,060 INFO L226 Difference]: Without dead ends: 87 [2020-10-26 19:27:21,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:27:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-26 19:27:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-26 19:27:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:27:21,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2020-10-26 19:27:21,066 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 77 [2020-10-26 19:27:21,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:21,066 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2020-10-26 19:27:21,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:27:21,067 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2020-10-26 19:27:21,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:27:21,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:21,068 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:21,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:27:21,068 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:21,068 INFO L82 PathProgramCache]: Analyzing trace with hash -27867669, now seen corresponding path program 31 times [2020-10-26 19:27:21,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:21,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539499964] [2020-10-26 19:27:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:21,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:21,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:23,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:23,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:27:23,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:23,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2811 [2020-10-26 19:27:23,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:23,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:27:23,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:23,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:27:23,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:25,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:25,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:25,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:25,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:25,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:25,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:25,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:25,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:25,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:25,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:25,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:25,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539499964] [2020-10-26 19:27:25,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:25,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:27:25,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555646369] [2020-10-26 19:27:25,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:27:25,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:25,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:27:25,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:27:25,277 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 35 states. [2020-10-26 19:27:25,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:25,805 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-10-26 19:27:25,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:27:25,806 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 79 [2020-10-26 19:27:25,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:25,807 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:27:25,807 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:27:25,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:27:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:27:25,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-26 19:27:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:27:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-10-26 19:27:25,813 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 79 [2020-10-26 19:27:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:25,813 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-10-26 19:27:25,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:27:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-10-26 19:27:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:27:25,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:25,814 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:25,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:27:25,815 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:25,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1330873271, now seen corresponding path program 32 times [2020-10-26 19:27:25,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:25,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891094896] [2020-10-26 19:27:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:25,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:25,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:28,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:28,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:27:28,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:28,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2943 [2020-10-26 19:27:28,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:28,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:27:28,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:28,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:27:28,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:30,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:30,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:30,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:30,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:30,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:30,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:30,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:30,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:30,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:30,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891094896] [2020-10-26 19:27:30,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:30,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:27:30,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112478645] [2020-10-26 19:27:30,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:27:30,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:30,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:27:30,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:27:30,257 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 36 states. [2020-10-26 19:27:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:30,802 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-10-26 19:27:30,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:27:30,803 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 81 [2020-10-26 19:27:30,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:30,804 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:27:30,804 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:27:30,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:27:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:27:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-26 19:27:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:27:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2020-10-26 19:27:30,810 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 81 [2020-10-26 19:27:30,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:30,811 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2020-10-26 19:27:30,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:27:30,811 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2020-10-26 19:27:30,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:27:30,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:30,812 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:30,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:27:30,812 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:30,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:30,813 INFO L82 PathProgramCache]: Analyzing trace with hash 611193639, now seen corresponding path program 33 times [2020-10-26 19:27:30,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:30,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565350588] [2020-10-26 19:27:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:30,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:30,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:34,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:34,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:27:34,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:34,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3253 [2020-10-26 19:27:34,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:27:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:27:34,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:35,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:35,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:35,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:35,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:35,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:35,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:35,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:35,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:35,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:35,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:35,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:35,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565350588] [2020-10-26 19:27:35,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:35,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:27:35,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976587159] [2020-10-26 19:27:35,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:27:35,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:35,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:27:35,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:27:35,653 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 37 states. [2020-10-26 19:27:36,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:36,211 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-10-26 19:27:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:27:36,212 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 83 [2020-10-26 19:27:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:36,213 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:27:36,213 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:27:36,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:27:36,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:27:36,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-26 19:27:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:27:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-10-26 19:27:36,220 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 83 [2020-10-26 19:27:36,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:36,220 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-10-26 19:27:36,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:27:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-10-26 19:27:36,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:27:36,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:36,221 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:36,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:27:36,222 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:36,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:36,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1373279611, now seen corresponding path program 34 times [2020-10-26 19:27:36,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:36,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540568252] [2020-10-26 19:27:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:36,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:36,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:39,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:39,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:27:39,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:39,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3485 [2020-10-26 19:27:39,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:39,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:27:39,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:39,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:27:39,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:41,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:41,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:41,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:41,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:41,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:41,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:41,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:41,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:41,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:41,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:41,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:41,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540568252] [2020-10-26 19:27:41,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:41,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:27:41,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334812473] [2020-10-26 19:27:41,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:27:41,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:41,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:27:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:27:41,330 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 38 states. [2020-10-26 19:27:41,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:41,706 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-10-26 19:27:41,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:27:41,707 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 85 [2020-10-26 19:27:41,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:41,708 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:27:41,708 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:27:41,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:27:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:27:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-26 19:27:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:27:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2020-10-26 19:27:41,715 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 85 [2020-10-26 19:27:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:41,716 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2020-10-26 19:27:41,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:27:41,716 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2020-10-26 19:27:41,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:27:41,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:41,717 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:41,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:27:41,717 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:41,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1486593437, now seen corresponding path program 35 times [2020-10-26 19:27:41,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:41,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945335258] [2020-10-26 19:27:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:41,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:41,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:45,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:45,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:27:45,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:45,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3764 [2020-10-26 19:27:45,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:45,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:27:45,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:45,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:27:45,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:47,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:47,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:47,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:47,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:47,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:47,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:47,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:47,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:47,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:47,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:47,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:47,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945335258] [2020-10-26 19:27:47,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:47,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:27:47,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508663564] [2020-10-26 19:27:47,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:27:47,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:47,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:27:47,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:27:47,291 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 39 states. [2020-10-26 19:27:47,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:47,872 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-10-26 19:27:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:27:47,873 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 87 [2020-10-26 19:27:47,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:47,874 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:27:47,874 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:27:47,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:27:47,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:27:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-26 19:27:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-26 19:27:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2020-10-26 19:27:47,882 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 87 [2020-10-26 19:27:47,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:47,883 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2020-10-26 19:27:47,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:27:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2020-10-26 19:27:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:27:47,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:47,884 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:47,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:27:47,884 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:47,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:47,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1287969473, now seen corresponding path program 36 times [2020-10-26 19:27:47,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:47,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15360033] [2020-10-26 19:27:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:47,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:47,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:51,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:51,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:27:51,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:51,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4083 [2020-10-26 19:27:51,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:27:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:51,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:27:51,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:53,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:53,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:53,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:53,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:53,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:53,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:53,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:53,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:53,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:53,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:53,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:27:53,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15360033] [2020-10-26 19:27:53,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:53,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:27:53,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446109162] [2020-10-26 19:27:53,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:27:53,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:53,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:27:53,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:27:53,789 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand 40 states. [2020-10-26 19:27:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:54,134 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-10-26 19:27:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:27:54,135 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2020-10-26 19:27:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:54,137 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:27:54,137 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:27:54,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:27:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:27:54,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-26 19:27:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:27:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2020-10-26 19:27:54,144 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 89 [2020-10-26 19:27:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:54,144 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2020-10-26 19:27:54,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:27:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2020-10-26 19:27:54,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:27:54,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:54,145 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:54,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:27:54,145 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:54,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:54,146 INFO L82 PathProgramCache]: Analyzing trace with hash 468235167, now seen corresponding path program 37 times [2020-10-26 19:27:54,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:54,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807022667] [2020-10-26 19:27:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:54,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:54,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:58,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:58,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:27:58,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:27:58,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4285 [2020-10-26 19:27:58,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:58,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:27:58,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:58,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:27:58,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:00,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:00,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:00,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:00,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:00,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:00,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:00,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:00,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:00,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:00,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:00,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:00,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807022667] [2020-10-26 19:28:00,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:00,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:28:00,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874879221] [2020-10-26 19:28:00,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:28:00,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:00,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:28:00,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:28:00,428 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand 41 states. [2020-10-26 19:28:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:01,040 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-10-26 19:28:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:28:01,041 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 91 [2020-10-26 19:28:01,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:01,042 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:28:01,042 INFO L226 Difference]: Without dead ends: 101 [2020-10-26 19:28:01,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:28:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-26 19:28:01,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-26 19:28:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:28:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-10-26 19:28:01,048 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 91 [2020-10-26 19:28:01,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:01,049 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-10-26 19:28:01,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:28:01,049 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-10-26 19:28:01,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:28:01,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:01,050 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:01,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:28:01,050 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:01,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1317417731, now seen corresponding path program 38 times [2020-10-26 19:28:01,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:01,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685189482] [2020-10-26 19:28:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:01,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:01,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:06,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:06,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:28:06,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:06,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4997 [2020-10-26 19:28:06,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:06,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:28:06,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:06,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:28:06,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:08,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:08,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:08,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:08,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:08,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:08,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:08,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:08,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:08,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:08,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:08,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:08,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685189482] [2020-10-26 19:28:08,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:08,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:28:08,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724340308] [2020-10-26 19:28:08,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:28:08,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:08,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:28:08,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:28:08,093 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 42 states. [2020-10-26 19:28:08,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:08,645 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-10-26 19:28:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:28:08,646 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 93 [2020-10-26 19:28:08,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:08,647 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:28:08,647 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 19:28:08,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:28:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 19:28:08,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-26 19:28:08,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:28:08,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2020-10-26 19:28:08,653 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 93 [2020-10-26 19:28:08,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:08,654 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2020-10-26 19:28:08,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:28:08,654 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2020-10-26 19:28:08,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:28:08,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:08,655 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:08,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:28:08,655 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:08,656 INFO L82 PathProgramCache]: Analyzing trace with hash 657065691, now seen corresponding path program 39 times [2020-10-26 19:28:08,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:08,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249243970] [2020-10-26 19:28:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:08,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:08,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:13,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:13,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:28:13,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:13,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:28:13,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:13,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:28:13,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:13,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:28:13,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:15,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:15,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:15,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:15,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:15,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:15,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:15,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:15,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:15,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:15,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:15,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:15,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249243970] [2020-10-26 19:28:15,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:15,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:28:15,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120623664] [2020-10-26 19:28:15,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:28:15,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:15,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:28:15,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:28:15,796 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 43 states. [2020-10-26 19:28:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:16,260 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-10-26 19:28:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:28:16,261 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 95 [2020-10-26 19:28:16,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:16,262 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:28:16,263 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:28:16,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:28:16,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:28:16,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-26 19:28:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-26 19:28:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2020-10-26 19:28:16,269 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 95 [2020-10-26 19:28:16,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:16,269 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2020-10-26 19:28:16,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:28:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2020-10-26 19:28:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:28:16,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:16,270 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:16,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:28:16,270 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:16,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:16,270 INFO L82 PathProgramCache]: Analyzing trace with hash -239910599, now seen corresponding path program 40 times [2020-10-26 19:28:16,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:16,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741909573] [2020-10-26 19:28:16,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:16,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:21,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:21,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:28:21,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:21,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:28:21,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:21,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:28:21,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:21,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:28:21,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:23,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:23,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:23,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:23,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:23,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:23,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:23,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:23,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:23,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:23,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:23,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:23,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741909573] [2020-10-26 19:28:23,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:23,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:28:23,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414417258] [2020-10-26 19:28:23,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:28:23,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:23,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:28:23,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:28:23,511 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand 44 states. [2020-10-26 19:28:23,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:23,968 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-10-26 19:28:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:28:23,969 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 97 [2020-10-26 19:28:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:23,970 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:28:23,970 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 19:28:23,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:28:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 19:28:23,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-26 19:28:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:28:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-10-26 19:28:23,976 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 97 [2020-10-26 19:28:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:23,977 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-10-26 19:28:23,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:28:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-10-26 19:28:23,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:28:23,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:23,978 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:23,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:28:23,978 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:23,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:23,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1054301207, now seen corresponding path program 41 times [2020-10-26 19:28:23,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:23,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120094147] [2020-10-26 19:28:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:24,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:24,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:29,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:29,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:28:29,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:29,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:28:29,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:29,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:28:29,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:29,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:28:29,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:31,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:31,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:31,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:31,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:31,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:31,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:28:31,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:31,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:31,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:31,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:31,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:31,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120094147] [2020-10-26 19:28:31,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:31,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:28:31,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066052363] [2020-10-26 19:28:31,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:28:31,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:31,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:28:31,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:28:31,327 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 45 states. [2020-10-26 19:28:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:31,815 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-10-26 19:28:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:28:31,816 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 99 [2020-10-26 19:28:31,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:31,818 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:28:31,818 INFO L226 Difference]: Without dead ends: 109 [2020-10-26 19:28:31,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:28:31,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-26 19:28:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-26 19:28:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:28:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2020-10-26 19:28:31,825 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 99 [2020-10-26 19:28:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:31,825 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2020-10-26 19:28:31,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:28:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2020-10-26 19:28:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:28:31,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:31,826 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:31,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:28:31,827 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:31,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:31,827 INFO L82 PathProgramCache]: Analyzing trace with hash -748669067, now seen corresponding path program 42 times [2020-10-26 19:28:31,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:31,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455063549] [2020-10-26 19:28:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:31,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:31,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:36,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:36,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:28:36,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:36,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:28:36,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:36,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:28:36,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:36,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:28:36,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:39,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:39,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:39,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:39,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:39,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:39,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:39,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:39,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:39,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:39,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:39,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:39,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455063549] [2020-10-26 19:28:39,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:39,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:28:39,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540240637] [2020-10-26 19:28:39,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:28:39,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:39,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:28:39,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:28:39,298 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 46 states. [2020-10-26 19:28:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:39,885 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-10-26 19:28:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:28:39,886 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 101 [2020-10-26 19:28:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:39,887 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:28:39,888 INFO L226 Difference]: Without dead ends: 111 [2020-10-26 19:28:39,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:28:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-26 19:28:39,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-26 19:28:39,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:28:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2020-10-26 19:28:39,892 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 101 [2020-10-26 19:28:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:39,892 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2020-10-26 19:28:39,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:28:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2020-10-26 19:28:39,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 19:28:39,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:39,893 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:39,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:28:39,894 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:39,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:39,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1763685203, now seen corresponding path program 43 times [2020-10-26 19:28:39,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:39,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683261954] [2020-10-26 19:28:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:39,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:39,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:44,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:44,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 19:28:44,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:44,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:28:44,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:44,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-26 19:28:44,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:44,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 19:28:44,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:47,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:47,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:47,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:47,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:47,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:47,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:47,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:47,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:47,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:47,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:47,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:47,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683261954] [2020-10-26 19:28:47,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:47,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:28:47,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855557707] [2020-10-26 19:28:47,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:28:47,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:47,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:28:47,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:28:47,462 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand 47 states. [2020-10-26 19:28:48,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:48,180 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-10-26 19:28:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:28:48,181 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 103 [2020-10-26 19:28:48,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:48,182 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:28:48,183 INFO L226 Difference]: Without dead ends: 113 [2020-10-26 19:28:48,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:28:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-26 19:28:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-26 19:28:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-26 19:28:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2020-10-26 19:28:48,188 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 103 [2020-10-26 19:28:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:48,188 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2020-10-26 19:28:48,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:28:48,188 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2020-10-26 19:28:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:28:48,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:48,189 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:48,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:28:48,189 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:48,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:48,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1930448975, now seen corresponding path program 44 times [2020-10-26 19:28:48,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:48,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115155551] [2020-10-26 19:28:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:48,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:48,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:53,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:53,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:28:53,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:28:53,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:28:53,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:53,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-26 19:28:53,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:53,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 19:28:53,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:55,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:55,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:55,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:55,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:55,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:55,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:55,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:55,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:55,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:55,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:55,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:28:55,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115155551] [2020-10-26 19:28:55,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:55,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-26 19:28:55,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197905204] [2020-10-26 19:28:55,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-26 19:28:55,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:55,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-26 19:28:55,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:28:55,859 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 48 states. [2020-10-26 19:28:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:56,255 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2020-10-26 19:28:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-26 19:28:56,256 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 105 [2020-10-26 19:28:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:56,258 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:28:56,258 INFO L226 Difference]: Without dead ends: 115 [2020-10-26 19:28:56,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:28:56,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-26 19:28:56,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-26 19:28:56,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:28:56,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2020-10-26 19:28:56,263 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 105 [2020-10-26 19:28:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:56,264 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2020-10-26 19:28:56,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-26 19:28:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2020-10-26 19:28:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 19:28:56,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:56,264 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:56,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:28:56,265 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:56,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:56,265 INFO L82 PathProgramCache]: Analyzing trace with hash -55440241, now seen corresponding path program 45 times [2020-10-26 19:28:56,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:56,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623651478] [2020-10-26 19:28:56,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:56,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:56,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:01,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:01,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 19:29:01,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:01,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-26 19:29:01,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:01,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-26 19:29:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 19:29:01,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:04,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:04,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:04,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:04,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:04,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:04,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:29:04,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:04,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:04,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:04,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:04,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:04,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623651478] [2020-10-26 19:29:04,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:04,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:29:04,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555730563] [2020-10-26 19:29:04,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:29:04,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:04,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:29:04,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:29:04,108 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand 49 states. [2020-10-26 19:29:04,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:04,805 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2020-10-26 19:29:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:29:04,806 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 107 [2020-10-26 19:29:04,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:04,807 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:29:04,807 INFO L226 Difference]: Without dead ends: 117 [2020-10-26 19:29:04,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:29:04,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-26 19:29:04,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-26 19:29:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-26 19:29:04,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2020-10-26 19:29:04,812 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 107 [2020-10-26 19:29:04,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:04,813 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2020-10-26 19:29:04,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:29:04,813 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2020-10-26 19:29:04,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:29:04,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:04,813 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:04,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:29:04,813 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:04,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:04,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2058311187, now seen corresponding path program 46 times [2020-10-26 19:29:04,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:04,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679016626] [2020-10-26 19:29:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:04,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:04,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:09,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:09,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:29:09,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:09,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:29:09,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:09,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-26 19:29:09,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:09,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 19:29:09,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:12,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:12,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:12,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:12,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:12,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:12,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:29:12,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:12,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:12,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:12,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:12,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:12,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679016626] [2020-10-26 19:29:12,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:12,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-26 19:29:12,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126484833] [2020-10-26 19:29:12,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-26 19:29:12,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:12,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-26 19:29:12,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:29:12,758 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand 50 states. [2020-10-26 19:29:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:13,248 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-10-26 19:29:13,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 19:29:13,249 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 109 [2020-10-26 19:29:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:13,250 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:29:13,250 INFO L226 Difference]: Without dead ends: 119 [2020-10-26 19:29:13,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:29:13,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-26 19:29:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-26 19:29:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:29:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2020-10-26 19:29:13,257 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 109 [2020-10-26 19:29:13,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:13,257 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2020-10-26 19:29:13,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-26 19:29:13,257 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2020-10-26 19:29:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-26 19:29:13,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:13,258 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:13,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:29:13,258 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:13,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:13,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1623025611, now seen corresponding path program 47 times [2020-10-26 19:29:13,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:13,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522986296] [2020-10-26 19:29:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:13,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:13,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:18,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:18,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-26 19:29:18,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:18,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:29:18,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:18,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-26 19:29:18,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:18,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 19:29:18,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:21,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:21,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:21,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:21,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:21,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:21,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:21,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:21,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:21,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:21,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:21,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:21,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522986296] [2020-10-26 19:29:21,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:21,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:29:21,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228292888] [2020-10-26 19:29:21,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:29:21,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:21,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:29:21,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:29:21,289 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand 51 states. [2020-10-26 19:29:22,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:22,080 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2020-10-26 19:29:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:29:22,081 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 111 [2020-10-26 19:29:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:22,082 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:29:22,082 INFO L226 Difference]: Without dead ends: 121 [2020-10-26 19:29:22,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:29:22,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-26 19:29:22,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-26 19:29:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-26 19:29:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2020-10-26 19:29:22,087 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 111 [2020-10-26 19:29:22,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:22,087 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2020-10-26 19:29:22,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:29:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2020-10-26 19:29:22,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:29:22,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:22,088 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:22,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-26 19:29:22,089 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash 334636585, now seen corresponding path program 48 times [2020-10-26 19:29:22,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:22,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685685399] [2020-10-26 19:29:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:22,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:22,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:27,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:27,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:29:27,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:27,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 19:29:27,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:27,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-26 19:29:27,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:27,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 19:29:27,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:30,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:30,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:30,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:30,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:30,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:30,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:30,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:30,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:30,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:30,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:30,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685685399] [2020-10-26 19:29:30,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:30,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-26 19:29:30,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666434445] [2020-10-26 19:29:30,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-26 19:29:30,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:30,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-26 19:29:30,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:29:30,277 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand 52 states. [2020-10-26 19:29:31,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:31,071 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-10-26 19:29:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-26 19:29:31,072 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 113 [2020-10-26 19:29:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:31,073 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:29:31,073 INFO L226 Difference]: Without dead ends: 123 [2020-10-26 19:29:31,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-26 19:29:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-26 19:29:31,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-26 19:29:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:29:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2020-10-26 19:29:31,078 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 113 [2020-10-26 19:29:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:31,078 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2020-10-26 19:29:31,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-26 19:29:31,079 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2020-10-26 19:29:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-26 19:29:31,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:31,080 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:31,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-26 19:29:31,080 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:31,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:31,080 INFO L82 PathProgramCache]: Analyzing trace with hash -856636153, now seen corresponding path program 49 times [2020-10-26 19:29:31,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:31,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805690346] [2020-10-26 19:29:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:31,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:31,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:36,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:36,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-26 19:29:36,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:36,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 19:29:36,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:36,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-26 19:29:36,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:36,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-26 19:29:36,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:39,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:39,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:39,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:39,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:39,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:39,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:39,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:39,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:39,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:39,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:39,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805690346] [2020-10-26 19:29:39,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:39,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:29:39,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552388103] [2020-10-26 19:29:39,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:29:39,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:39,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:29:39,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:29:39,403 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand 53 states. [2020-10-26 19:29:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:40,204 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2020-10-26 19:29:40,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:29:40,205 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 115 [2020-10-26 19:29:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:40,207 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:29:40,207 INFO L226 Difference]: Without dead ends: 125 [2020-10-26 19:29:40,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:29:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-26 19:29:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-26 19:29:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-26 19:29:40,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2020-10-26 19:29:40,211 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 115 [2020-10-26 19:29:40,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:40,212 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2020-10-26 19:29:40,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:29:40,212 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2020-10-26 19:29:40,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:29:40,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:40,213 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:40,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-26 19:29:40,213 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:40,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:40,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1086530661, now seen corresponding path program 50 times [2020-10-26 19:29:40,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:40,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180152727] [2020-10-26 19:29:40,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:40,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:40,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:45,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:45,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 19:29:45,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:45,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:29:45,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:45,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-26 19:29:45,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:45,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 19:29:45,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:48,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:48,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:48,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:48,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:48,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:48,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:29:48,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:48,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:48,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:48,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:48,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:48,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180152727] [2020-10-26 19:29:48,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:48,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-26 19:29:48,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128988276] [2020-10-26 19:29:48,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-26 19:29:48,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:48,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-26 19:29:48,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:29:48,708 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand 54 states. [2020-10-26 19:29:49,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:49,522 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2020-10-26 19:29:49,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-26 19:29:49,523 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 117 [2020-10-26 19:29:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:49,524 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:29:49,525 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:29:49,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:29:49,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:29:49,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-26 19:29:49,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:29:49,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2020-10-26 19:29:49,531 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 117 [2020-10-26 19:29:49,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:49,531 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2020-10-26 19:29:49,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-26 19:29:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2020-10-26 19:29:49,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-26 19:29:49,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:49,532 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:49,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-26 19:29:49,533 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:49,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:49,533 INFO L82 PathProgramCache]: Analyzing trace with hash 159065155, now seen corresponding path program 51 times [2020-10-26 19:29:49,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:49,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743813376] [2020-10-26 19:29:49,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:49,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:49,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:54,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:54,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 19:29:54,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:54,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:29:54,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:54,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-26 19:29:54,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:54,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 19:29:54,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:58,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:58,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:58,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:58,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:58,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:58,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:29:58,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:58,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:58,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:58,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:58,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:58,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743813376] [2020-10-26 19:29:58,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:58,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-26 19:29:58,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355004414] [2020-10-26 19:29:58,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-26 19:29:58,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:58,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-26 19:29:58,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:29:58,081 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand 55 states. [2020-10-26 19:29:58,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:58,921 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2020-10-26 19:29:58,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:29:58,922 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 119 [2020-10-26 19:29:58,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:58,924 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:29:58,924 INFO L226 Difference]: Without dead ends: 129 [2020-10-26 19:29:58,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:29:58,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-26 19:29:58,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-26 19:29:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-26 19:29:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2020-10-26 19:29:58,929 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 119 [2020-10-26 19:29:58,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:58,930 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2020-10-26 19:29:58,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-26 19:29:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2020-10-26 19:29:58,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-26 19:29:58,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:58,931 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:58,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-26 19:29:58,931 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:58,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:58,932 INFO L82 PathProgramCache]: Analyzing trace with hash -2077055839, now seen corresponding path program 52 times [2020-10-26 19:29:58,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:58,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467229223] [2020-10-26 19:29:58,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:58,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:59,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:03,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:03,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 19:30:03,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:03,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:30:03,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:03,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-26 19:30:03,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:03,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 19:30:03,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0