/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-industry-pattern/array_ptr_partial_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:45:44,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:45:44,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:45:44,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:45:44,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:45:44,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:45:44,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:45:44,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:45:44,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:45:44,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:45:44,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:45:44,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:45:44,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:45:44,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:45:44,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:45:44,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:45:44,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:45:44,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:45:44,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:45:44,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:45:44,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:45:44,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:45:44,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:45:44,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:45:44,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:45:44,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:45:44,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:45:44,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:45:44,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:45:44,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:45:44,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:45:44,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:45:44,318 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:45:44,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:45:44,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:45:44,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:45:44,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:45:44,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:45:44,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:45:44,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:45:44,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:45:44,325 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 19:45:44,360 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:45:44,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:45:44,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:45:44,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:45:44,362 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:45:44,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:45:44,362 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:45:44,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:45:44,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:45:44,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:45:44,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:45:44,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:45:44,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:45:44,364 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:45:44,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:45:44,364 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:45:44,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:45:44,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:45:44,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:45:44,365 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:45:44,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:45:44,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:45:44,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:45:44,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:45:44,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:45:44,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:45:44,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:45:44,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:45:44,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:45:44,367 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:45:44,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:45:44,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:45:44,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:45:44,913 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:45:44,913 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:45:44,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_partial_init.i [2020-10-26 19:45:45,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d701544ae/7500569dd8694434b8da76ee7202c005/FLAGf1a092af4 [2020-10-26 19:45:45,694 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:45:45,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_ptr_partial_init.i [2020-10-26 19:45:45,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d701544ae/7500569dd8694434b8da76ee7202c005/FLAGf1a092af4 [2020-10-26 19:45:46,025 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d701544ae/7500569dd8694434b8da76ee7202c005 [2020-10-26 19:45:46,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:45:46,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:45:46,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:45:46,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:45:46,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:45:46,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:45:46" (1/1) ... [2020-10-26 19:45:46,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4545301b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:46, skipping insertion in model container [2020-10-26 19:45:46,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:45:46" (1/1) ... [2020-10-26 19:45:46,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:45:46,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:45:46,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:45:46,282 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:45:46,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:45:46,321 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:45:46,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:46 WrapperNode [2020-10-26 19:45:46,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:45:46,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:45:46,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:45:46,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:45:46,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:46" (1/1) ... [2020-10-26 19:45:46,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:46" (1/1) ... [2020-10-26 19:45:46,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:46" (1/1) ... [2020-10-26 19:45:46,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:46" (1/1) ... [2020-10-26 19:45:46,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:46" (1/1) ... [2020-10-26 19:45:46,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:46" (1/1) ... [2020-10-26 19:45:46,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:46" (1/1) ... [2020-10-26 19:45:46,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:45:46,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:45:46,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:45:46,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:45:46,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:46" (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 19:45:46,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:45:46,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:45:46,506 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:45:46,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:45:46,507 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:45:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:45:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:45:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:45:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:45:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:45:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:45:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:45:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:45:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:45:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:45:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-26 19:45:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-26 19:45:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:45:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:45:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:45:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:45:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:45:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:45:46,838 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:45:46,838 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:45:46,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:45:46 BoogieIcfgContainer [2020-10-26 19:45:46,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:45:46,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:45:46,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:45:46,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:45:46,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:45:46" (1/3) ... [2020-10-26 19:45:46,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282c6198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:45:46, skipping insertion in model container [2020-10-26 19:45:46,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:45:46" (2/3) ... [2020-10-26 19:45:46,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282c6198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:45:46, skipping insertion in model container [2020-10-26 19:45:46,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:45:46" (3/3) ... [2020-10-26 19:45:46,850 INFO L111 eAbstractionObserver]: Analyzing ICFG array_ptr_partial_init.i [2020-10-26 19:45:46,871 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:45:46,876 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:45:46,892 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:45:46,940 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:45:46,940 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:45:46,940 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:45:46,941 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:45:46,941 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:45:46,941 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:45:46,941 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:45:46,941 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:45:46,970 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-26 19:45:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:45:46,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:46,980 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 19:45:46,981 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:46,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1906025394, now seen corresponding path program 1 times [2020-10-26 19:45:47,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:47,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138476707] [2020-10-26 19:45:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:47,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:47,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:47,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:47,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:45:47,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:47,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-26 19:45:47,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:47,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:47,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:45:47,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:47,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 19:45:47,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:47,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:47,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:47,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:47,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:47,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 19:45:47,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:47,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:47,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:47,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:47,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:45:47,673 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 19:45:47,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138476707] [2020-10-26 19:45:47,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:45:47,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:45:47,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265377590] [2020-10-26 19:45:47,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:45:47,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:47,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:45:47,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:45:47,702 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-26 19:45:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:47,795 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-26 19:45:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:45:47,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-26 19:45:47,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:47,806 INFO L225 Difference]: With dead ends: 53 [2020-10-26 19:45:47,806 INFO L226 Difference]: Without dead ends: 24 [2020-10-26 19:45:47,810 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 19:45:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-26 19:45:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-26 19:45:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 19:45:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-26 19:45:47,855 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-26 19:45:47,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:47,855 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-26 19:45:47,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:45:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-26 19:45:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:45:47,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:47,857 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 19:45:47,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:45:47,857 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:47,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1754426942, now seen corresponding path program 1 times [2020-10-26 19:45:47,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:47,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050253480] [2020-10-26 19:45:47,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:47,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:47,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:48,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:48,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:45:48,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:45:48,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-26 19:45:48,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:48,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:45:48,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:48,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:45:48,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:48,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:48,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:48,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:48,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:48,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:48,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:45:48,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:48,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:48,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:48,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:48,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:48,260 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 19:45:48,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050253480] [2020-10-26 19:45:48,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:45:48,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:45:48,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147431348] [2020-10-26 19:45:48,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:45:48,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:48,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:45:48,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:45:48,265 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2020-10-26 19:45:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:48,433 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-10-26 19:45:48,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:45:48,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:45:48,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:48,435 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:45:48,436 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:45:48,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:45:48,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:45:48,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2020-10-26 19:45:48,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-26 19:45:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-26 19:45:48,447 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2020-10-26 19:45:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:48,448 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-26 19:45:48,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:45:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-26 19:45:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:45:48,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:48,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:48,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:45:48,450 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:48,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:48,450 INFO L82 PathProgramCache]: Analyzing trace with hash -999640386, now seen corresponding path program 1 times [2020-10-26 19:45:48,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:48,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677842527] [2020-10-26 19:45:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:48,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:48,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:48,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:49,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:49,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:45:49,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:45:49,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1229 [2020-10-26 19:45:49,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:49,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:45:49,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:49,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:45:49,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:49,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:49,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:49,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:49,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:49,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:49,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:45:49,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:49,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:49,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:49,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:49,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:45:49,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677842527] [2020-10-26 19:45:49,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:49,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:45:49,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232769117] [2020-10-26 19:45:49,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:45:49,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:49,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:45:49,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:45:49,797 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-10-26 19:45:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:50,109 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-10-26 19:45:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:45:50,110 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-26 19:45:50,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:50,113 INFO L225 Difference]: With dead ends: 73 [2020-10-26 19:45:50,113 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:45:50,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:45:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:45:50,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2020-10-26 19:45:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:45:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-26 19:45:50,129 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-10-26 19:45:50,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:50,130 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-26 19:45:50,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:45:50,130 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-26 19:45:50,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:45:50,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:50,131 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:50,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:45:50,132 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:50,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:50,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1354504774, now seen corresponding path program 2 times [2020-10-26 19:45:50,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:50,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223570432] [2020-10-26 19:45:50,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:50,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:50,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:50,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:53,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:53,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:45:53,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:45:53,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3203 [2020-10-26 19:45:53,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:53,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:45:53,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:53,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:45:53,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:53,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:53,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:53,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:53,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:53,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:53,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:45:53,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:53,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:53,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:53,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:53,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:45:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:45:53,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223570432] [2020-10-26 19:45:53,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:53,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:45:53,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459303135] [2020-10-26 19:45:53,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:45:53,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:53,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:45:53,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:45:53,485 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2020-10-26 19:45:53,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:53,777 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-10-26 19:45:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:45:53,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-26 19:45:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:53,779 INFO L225 Difference]: With dead ends: 91 [2020-10-26 19:45:53,779 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:45:53,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 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 19:45:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:45:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 34. [2020-10-26 19:45:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:45:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-26 19:45:53,789 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2020-10-26 19:45:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:53,790 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-26 19:45:53,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:45:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-26 19:45:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:45:53,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:53,791 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:53,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:45:53,792 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:53,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1478765238, now seen corresponding path program 3 times [2020-10-26 19:45:53,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:53,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393085465] [2020-10-26 19:45:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:53,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:53,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:53,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:58,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:58,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:45:58,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:45:58,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4914 [2020-10-26 19:45:58,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:58,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:45:58,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:45:58,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:45:58,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:58,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:45:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:58,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:58,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:45:58,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:45:58,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:45:58,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:45:58,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:45:58,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:45:58,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:45:58,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:45:58,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:45:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:45:58,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393085465] [2020-10-26 19:45:58,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:45:58,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:45:58,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454382904] [2020-10-26 19:45:58,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:45:58,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:45:58,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:45:58,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:45:58,814 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2020-10-26 19:45:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:45:59,172 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-10-26 19:45:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:45:59,173 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-26 19:45:59,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:45:59,174 INFO L225 Difference]: With dead ends: 109 [2020-10-26 19:45:59,174 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:45:59,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:45:59,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:45:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 38. [2020-10-26 19:45:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:45:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-26 19:45:59,184 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 29 [2020-10-26 19:45:59,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:45:59,185 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-26 19:45:59,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:45:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-26 19:45:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:45:59,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:45:59,186 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:45:59,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:45:59,186 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:45:59,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:45:59,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1598651982, now seen corresponding path program 4 times [2020-10-26 19:45:59,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:45:59,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087846679] [2020-10-26 19:45:59,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:45:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:45:59,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:59,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:45:59,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:04,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:04,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:46:04,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:46:04,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:46:04,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:04,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:46:04,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:04,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:46:04,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:04,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:04,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:04,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:04,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:04,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:04,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 19:46:04,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:04,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:04,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:04,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:04,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:46:04,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087846679] [2020-10-26 19:46:04,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:04,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:46:04,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443727084] [2020-10-26 19:46:04,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:46:04,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:04,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:46:04,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:46:04,351 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 8 states. [2020-10-26 19:46:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:04,851 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2020-10-26 19:46:04,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:46:04,851 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-26 19:46:04,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:04,853 INFO L225 Difference]: With dead ends: 127 [2020-10-26 19:46:04,853 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:46:04,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:46:04,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:46:04,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 42. [2020-10-26 19:46:04,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:46:04,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-26 19:46:04,863 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2020-10-26 19:46:04,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:04,864 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-26 19:46:04,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:46:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-26 19:46:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:46:04,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:04,872 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:04,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:46:04,873 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:04,878 INFO L82 PathProgramCache]: Analyzing trace with hash -869930322, now seen corresponding path program 5 times [2020-10-26 19:46:04,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:04,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877478110] [2020-10-26 19:46:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:04,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:04,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:05,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:09,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:09,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:46:09,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:46:09,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:46:09,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:09,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:46:09,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:09,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:46:09,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:10,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:10,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:10,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:10,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:10,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:10,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:46:10,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:10,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:10,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:10,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:10,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:10,047 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-26 19:46:10,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877478110] [2020-10-26 19:46:10,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:10,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:46:10,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217572960] [2020-10-26 19:46:10,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:46:10,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:10,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:46:10,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:46:10,050 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 9 states. [2020-10-26 19:46:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:10,661 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2020-10-26 19:46:10,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:46:10,662 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-26 19:46:10,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:10,663 INFO L225 Difference]: With dead ends: 145 [2020-10-26 19:46:10,663 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:46:10,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:46:10,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:46:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 46. [2020-10-26 19:46:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:46:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-26 19:46:10,674 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-10-26 19:46:10,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:10,675 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-26 19:46:10,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:46:10,675 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-26 19:46:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:46:10,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:10,676 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:10,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:46:10,677 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:10,677 INFO L82 PathProgramCache]: Analyzing trace with hash -14850646, now seen corresponding path program 6 times [2020-10-26 19:46:10,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:10,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593528858] [2020-10-26 19:46:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:10,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:10,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:10,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:15,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:15,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:46:15,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:46:15,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:46:15,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:15,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:46:15,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:15,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:46:15,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:15,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:15,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:15,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:15,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:15,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:15,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:46:15,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:15,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:15,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:15,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:15,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:46:15,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593528858] [2020-10-26 19:46:15,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:15,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:46:15,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315967459] [2020-10-26 19:46:15,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:46:15,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:15,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:46:15,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:46:15,844 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 10 states. [2020-10-26 19:46:16,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:16,673 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2020-10-26 19:46:16,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:46:16,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-26 19:46:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:16,675 INFO L225 Difference]: With dead ends: 163 [2020-10-26 19:46:16,675 INFO L226 Difference]: Without dead ends: 136 [2020-10-26 19:46:16,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:46:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-26 19:46:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 50. [2020-10-26 19:46:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:46:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-26 19:46:16,697 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 41 [2020-10-26 19:46:16,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:16,697 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-26 19:46:16,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:46:16,697 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-26 19:46:16,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:46:16,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:16,701 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:16,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:46:16,702 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:16,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1077415258, now seen corresponding path program 7 times [2020-10-26 19:46:16,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:16,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481821050] [2020-10-26 19:46:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:16,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:16,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:17,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:21,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:21,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:46:21,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:46:21,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:46:21,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:21,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:46:21,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:21,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:46:21,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:21,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:21,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:21,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:21,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:21,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:21,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:46:21,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:21,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:21,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:21,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:21,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-26 19:46:21,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481821050] [2020-10-26 19:46:21,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:21,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:46:21,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440621505] [2020-10-26 19:46:21,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:46:21,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:21,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:46:21,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:46:21,901 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 11 states. [2020-10-26 19:46:22,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:22,728 INFO L93 Difference]: Finished difference Result 181 states and 186 transitions. [2020-10-26 19:46:22,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:46:22,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-26 19:46:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:22,731 INFO L225 Difference]: With dead ends: 181 [2020-10-26 19:46:22,731 INFO L226 Difference]: Without dead ends: 152 [2020-10-26 19:46:22,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:46:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-26 19:46:22,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 54. [2020-10-26 19:46:22,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:46:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-26 19:46:22,742 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 45 [2020-10-26 19:46:22,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:22,742 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-26 19:46:22,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:46:22,742 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-26 19:46:22,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:46:22,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:22,743 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:22,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:46:22,744 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:22,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1976603042, now seen corresponding path program 8 times [2020-10-26 19:46:22,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:22,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380042197] [2020-10-26 19:46:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:22,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:22,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:23,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:27,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:27,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:46:27,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:46:27,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:46:27,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:27,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:46:27,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:27,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:46:27,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:27,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:27,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:27,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:27,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:27,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:27,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:46:27,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:27,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:27,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:27,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:27,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-26 19:46:27,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380042197] [2020-10-26 19:46:27,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:27,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:46:27,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800430889] [2020-10-26 19:46:27,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:46:27,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:27,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:46:27,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:46:27,944 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 12 states. [2020-10-26 19:46:28,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:28,930 INFO L93 Difference]: Finished difference Result 199 states and 204 transitions. [2020-10-26 19:46:28,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:46:28,931 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-26 19:46:28,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:28,932 INFO L225 Difference]: With dead ends: 199 [2020-10-26 19:46:28,932 INFO L226 Difference]: Without dead ends: 168 [2020-10-26 19:46:28,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:46:28,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-26 19:46:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 58. [2020-10-26 19:46:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:46:28,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-26 19:46:28,955 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-10-26 19:46:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:28,955 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-26 19:46:28,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:46:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-26 19:46:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:46:28,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:28,963 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:28,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:46:28,964 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:28,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:28,965 INFO L82 PathProgramCache]: Analyzing trace with hash -362659170, now seen corresponding path program 9 times [2020-10-26 19:46:28,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:28,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996489191] [2020-10-26 19:46:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:29,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:29,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:32,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:34,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:34,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:46:34,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:46:34,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:46:34,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:34,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:46:34,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:34,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:46:34,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:34,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:34,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:34,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:34,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:34,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:34,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:46:34,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:34,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:34,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:34,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:34,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 19:46:34,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996489191] [2020-10-26 19:46:34,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:34,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:46:34,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905792304] [2020-10-26 19:46:34,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:46:34,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:34,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:46:34,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:46:34,198 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 13 states. [2020-10-26 19:46:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:35,257 INFO L93 Difference]: Finished difference Result 217 states and 222 transitions. [2020-10-26 19:46:35,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:46:35,258 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-26 19:46:35,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:35,260 INFO L225 Difference]: With dead ends: 217 [2020-10-26 19:46:35,260 INFO L226 Difference]: Without dead ends: 184 [2020-10-26 19:46:35,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:46:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-26 19:46:35,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 62. [2020-10-26 19:46:35,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:46:35,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-26 19:46:35,281 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 53 [2020-10-26 19:46:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:35,285 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-26 19:46:35,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:46:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-26 19:46:35,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:46:35,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:35,286 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:35,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:46:35,286 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:35,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash -936901222, now seen corresponding path program 10 times [2020-10-26 19:46:35,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:35,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639656908] [2020-10-26 19:46:35,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:35,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:35,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:39,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:40,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:40,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:46:40,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:46:40,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:46:40,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:40,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:46:40,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:40,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:46:40,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:40,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:40,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:40,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:40,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:40,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:40,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:46:40,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:40,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:40,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:40,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:40,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 19:46:40,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639656908] [2020-10-26 19:46:40,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:40,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:46:40,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039581374] [2020-10-26 19:46:40,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:46:40,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:40,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:46:40,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:46:40,516 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 14 states. [2020-10-26 19:46:41,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:41,733 INFO L93 Difference]: Finished difference Result 235 states and 240 transitions. [2020-10-26 19:46:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:46:41,734 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-26 19:46:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:41,735 INFO L225 Difference]: With dead ends: 235 [2020-10-26 19:46:41,735 INFO L226 Difference]: Without dead ends: 200 [2020-10-26 19:46:41,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:46:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-26 19:46:41,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 66. [2020-10-26 19:46:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:46:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-26 19:46:41,754 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 57 [2020-10-26 19:46:41,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:41,754 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-26 19:46:41,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:46:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-26 19:46:41,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:46:41,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:41,755 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:41,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:46:41,756 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:41,756 INFO L82 PathProgramCache]: Analyzing trace with hash 458021526, now seen corresponding path program 11 times [2020-10-26 19:46:41,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:41,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980550740] [2020-10-26 19:46:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:41,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:41,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:46,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:46,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:46:46,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:46,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:46:46,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:46:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:46:46,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:47,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:47,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:47,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:47,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:47,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:47,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:46:47,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:47,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:47,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:47,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:47,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-26 19:46:47,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980550740] [2020-10-26 19:46:47,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:47,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:46:47,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235665104] [2020-10-26 19:46:47,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:46:47,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:47,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:46:47,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:46:47,075 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 15 states. [2020-10-26 19:46:48,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:48,414 INFO L93 Difference]: Finished difference Result 253 states and 258 transitions. [2020-10-26 19:46:48,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:46:48,415 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-10-26 19:46:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:48,417 INFO L225 Difference]: With dead ends: 253 [2020-10-26 19:46:48,417 INFO L226 Difference]: Without dead ends: 216 [2020-10-26 19:46:48,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:46:48,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-26 19:46:48,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 70. [2020-10-26 19:46:48,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:46:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-26 19:46:48,435 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-10-26 19:46:48,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:48,435 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-26 19:46:48,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:46:48,435 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-26 19:46:48,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:46:48,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:48,436 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:48,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:46:48,437 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:48,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:48,438 INFO L82 PathProgramCache]: Analyzing trace with hash -780418670, now seen corresponding path program 12 times [2020-10-26 19:46:48,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:48,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652042461] [2020-10-26 19:46:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:48,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:48,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:53,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:53,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:46:53,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:46:53,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:46:53,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:53,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:46:53,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:46:53,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:46:53,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:53,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:46:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:53,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:53,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:46:53,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:46:53,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:46:53,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:46:53,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:46:53,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:46:53,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:46:53,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:46:53,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:46:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-26 19:46:53,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652042461] [2020-10-26 19:46:53,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:46:53,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:46:53,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8316113] [2020-10-26 19:46:53,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:46:53,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:46:53,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:46:53,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:46:53,766 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 16 states. [2020-10-26 19:46:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:46:55,263 INFO L93 Difference]: Finished difference Result 271 states and 276 transitions. [2020-10-26 19:46:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:46:55,264 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-26 19:46:55,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:46:55,269 INFO L225 Difference]: With dead ends: 271 [2020-10-26 19:46:55,269 INFO L226 Difference]: Without dead ends: 232 [2020-10-26 19:46:55,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:46:55,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-26 19:46:55,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 74. [2020-10-26 19:46:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:46:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-26 19:46:55,290 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 65 [2020-10-26 19:46:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:46:55,290 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-26 19:46:55,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:46:55,290 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-26 19:46:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:46:55,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:46:55,293 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:46:55,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:46:55,293 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:46:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:46:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash 970963598, now seen corresponding path program 13 times [2020-10-26 19:46:55,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:46:55,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219265229] [2020-10-26 19:46:55,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:46:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:46:55,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:46:55,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:00,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:00,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:47:00,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:00,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:47:00,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:00,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:47:00,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:00,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:47:00,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:00,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:00,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:00,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:00,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:00,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:00,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:47:00,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:00,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:00,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:00,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:00,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:47:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-26 19:47:00,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219265229] [2020-10-26 19:47:00,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:00,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:47:00,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352135025] [2020-10-26 19:47:00,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:47:00,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:00,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:47:00,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:47:00,617 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 17 states. [2020-10-26 19:47:02,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:02,151 INFO L93 Difference]: Finished difference Result 289 states and 294 transitions. [2020-10-26 19:47:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:47:02,152 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-10-26 19:47:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:02,155 INFO L225 Difference]: With dead ends: 289 [2020-10-26 19:47:02,155 INFO L226 Difference]: Without dead ends: 248 [2020-10-26 19:47:02,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:47:02,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-26 19:47:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 78. [2020-10-26 19:47:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:47:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-26 19:47:02,168 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 69 [2020-10-26 19:47:02,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:02,169 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-26 19:47:02,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:47:02,169 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-26 19:47:02,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:47:02,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:02,170 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:02,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:47:02,170 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:02,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:02,170 INFO L82 PathProgramCache]: Analyzing trace with hash -2061253238, now seen corresponding path program 14 times [2020-10-26 19:47:02,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:02,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445991295] [2020-10-26 19:47:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:02,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:02,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:07,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:07,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:47:07,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:07,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-26 19:47:07,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:07,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:47:07,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:07,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:47:07,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:07,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:07,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:07,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:07,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:07,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:07,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:47:07,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:07,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:07,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:07,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:07,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-26 19:47:07,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445991295] [2020-10-26 19:47:07,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:07,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:47:07,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455710129] [2020-10-26 19:47:07,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:47:07,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:07,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:47:07,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:47:07,498 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 18 states. [2020-10-26 19:47:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:09,133 INFO L93 Difference]: Finished difference Result 307 states and 312 transitions. [2020-10-26 19:47:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:47:09,134 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-10-26 19:47:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:09,137 INFO L225 Difference]: With dead ends: 307 [2020-10-26 19:47:09,137 INFO L226 Difference]: Without dead ends: 264 [2020-10-26 19:47:09,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:47:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-26 19:47:09,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 82. [2020-10-26 19:47:09,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:47:09,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-26 19:47:09,150 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 73 [2020-10-26 19:47:09,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:09,150 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-26 19:47:09,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:47:09,150 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-26 19:47:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:47:09,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:09,151 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:09,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:47:09,152 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:09,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:09,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1165156998, now seen corresponding path program 15 times [2020-10-26 19:47:09,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:09,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617596225] [2020-10-26 19:47:09,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:09,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:09,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:14,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:14,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:47:14,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:14,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:47:14,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:14,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:47:14,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:14,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:47:14,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:14,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:14,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:14,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:14,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:14,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:14,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:47:14,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:14,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:14,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:14,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:14,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:47:14,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617596225] [2020-10-26 19:47:14,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:14,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:47:14,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638025777] [2020-10-26 19:47:14,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:47:14,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:14,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:47:14,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:47:14,514 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 19 states. [2020-10-26 19:47:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:16,318 INFO L93 Difference]: Finished difference Result 325 states and 330 transitions. [2020-10-26 19:47:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:47:16,324 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 77 [2020-10-26 19:47:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:16,326 INFO L225 Difference]: With dead ends: 325 [2020-10-26 19:47:16,326 INFO L226 Difference]: Without dead ends: 280 [2020-10-26 19:47:16,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:47:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-26 19:47:16,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 86. [2020-10-26 19:47:16,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:47:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-26 19:47:16,340 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 77 [2020-10-26 19:47:16,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:16,340 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-26 19:47:16,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:47:16,341 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-26 19:47:16,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:47:16,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:16,341 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:16,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:47:16,342 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:16,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:16,342 INFO L82 PathProgramCache]: Analyzing trace with hash -294121086, now seen corresponding path program 16 times [2020-10-26 19:47:16,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:16,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171563585] [2020-10-26 19:47:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:16,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:16,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:21,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:21,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:47:21,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:21,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-26 19:47:21,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:21,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:47:21,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:21,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:47:21,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:21,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:21,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:21,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:21,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:21,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:21,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:47:21,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:21,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:21,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-26 19:47:21,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171563585] [2020-10-26 19:47:21,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:21,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:47:21,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513512967] [2020-10-26 19:47:21,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:47:21,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:21,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:47:21,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:47:21,768 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 20 states. [2020-10-26 19:47:23,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:23,695 INFO L93 Difference]: Finished difference Result 343 states and 348 transitions. [2020-10-26 19:47:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:47:23,696 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-10-26 19:47:23,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:23,699 INFO L225 Difference]: With dead ends: 343 [2020-10-26 19:47:23,699 INFO L226 Difference]: Without dead ends: 296 [2020-10-26 19:47:23,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:47:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-26 19:47:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 90. [2020-10-26 19:47:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:47:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-26 19:47:23,714 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 81 [2020-10-26 19:47:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:23,714 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-26 19:47:23,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:47:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-26 19:47:23,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:47:23,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:23,715 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:23,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:47:23,716 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:23,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1432244862, now seen corresponding path program 17 times [2020-10-26 19:47:23,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:23,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134215230] [2020-10-26 19:47:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:23,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:23,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:28,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:28,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:47:28,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:28,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-26 19:47:28,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:28,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:47:28,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:28,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:47:28,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:29,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:29,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:29,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:29,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:29,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:29,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:47:29,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:29,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:29,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:29,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:29,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-26 19:47:29,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134215230] [2020-10-26 19:47:29,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:29,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:47:29,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16760353] [2020-10-26 19:47:29,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:47:29,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:29,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:47:29,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:47:29,232 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 21 states. [2020-10-26 19:47:31,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:31,343 INFO L93 Difference]: Finished difference Result 361 states and 366 transitions. [2020-10-26 19:47:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:47:31,344 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-10-26 19:47:31,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:31,346 INFO L225 Difference]: With dead ends: 361 [2020-10-26 19:47:31,346 INFO L226 Difference]: Without dead ends: 312 [2020-10-26 19:47:31,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:47:31,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-26 19:47:31,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 94. [2020-10-26 19:47:31,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:47:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-26 19:47:31,362 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 85 [2020-10-26 19:47:31,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:31,362 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-26 19:47:31,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:47:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-26 19:47:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:47:31,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:31,364 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:31,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:47:31,364 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:31,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:31,364 INFO L82 PathProgramCache]: Analyzing trace with hash 818980218, now seen corresponding path program 18 times [2020-10-26 19:47:31,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:31,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011757736] [2020-10-26 19:47:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:31,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:31,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:36,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:36,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:47:36,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:36,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:47:36,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:36,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:47:36,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:36,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:47:36,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:36,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:36,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:36,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:36,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:36,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:36,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:47:36,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:36,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:36,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:36,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:36,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-26 19:47:36,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011757736] [2020-10-26 19:47:36,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:36,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:47:36,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467690986] [2020-10-26 19:47:36,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:47:36,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:36,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:47:36,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:47:36,793 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 22 states. [2020-10-26 19:47:38,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:38,976 INFO L93 Difference]: Finished difference Result 379 states and 384 transitions. [2020-10-26 19:47:38,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:47:38,976 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 89 [2020-10-26 19:47:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:38,979 INFO L225 Difference]: With dead ends: 379 [2020-10-26 19:47:38,979 INFO L226 Difference]: Without dead ends: 328 [2020-10-26 19:47:38,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:47:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-26 19:47:38,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 98. [2020-10-26 19:47:38,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:47:38,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-26 19:47:38,995 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 89 [2020-10-26 19:47:38,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:38,995 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-26 19:47:38,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:47:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-26 19:47:38,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:47:38,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:38,996 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:38,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:47:38,996 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:38,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:38,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1728443786, now seen corresponding path program 19 times [2020-10-26 19:47:38,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:38,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855915244] [2020-10-26 19:47:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:39,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:39,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:44,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:44,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:47:44,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:44,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-26 19:47:44,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:44,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:47:44,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:44,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:47:44,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:44,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:44,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:44,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:44,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:44,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:44,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:47:44,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:44,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:44,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:44,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:44,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-26 19:47:44,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855915244] [2020-10-26 19:47:44,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:44,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:47:44,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665299180] [2020-10-26 19:47:44,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:47:44,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:44,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:47:44,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:47:44,570 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 23 states. [2020-10-26 19:47:46,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:46,923 INFO L93 Difference]: Finished difference Result 397 states and 402 transitions. [2020-10-26 19:47:46,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:47:46,923 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 93 [2020-10-26 19:47:46,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:46,926 INFO L225 Difference]: With dead ends: 397 [2020-10-26 19:47:46,927 INFO L226 Difference]: Without dead ends: 344 [2020-10-26 19:47:46,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:47:46,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-26 19:47:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 102. [2020-10-26 19:47:46,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:47:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-26 19:47:46,944 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 93 [2020-10-26 19:47:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:46,945 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-26 19:47:46,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:47:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-26 19:47:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:47:46,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:46,946 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:46,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:47:46,946 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:46,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:46,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2021293710, now seen corresponding path program 20 times [2020-10-26 19:47:46,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:46,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284230145] [2020-10-26 19:47:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:47,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:47,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:52,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:52,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:47:52,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:47:52,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5184 [2020-10-26 19:47:52,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:52,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:47:52,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:47:52,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:47:52,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:52,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:47:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:52,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:52,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:47:52,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:47:52,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:47:52,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:47:52,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:47:52,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:47:52,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:47:52,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:47:52,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:47:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-26 19:47:52,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284230145] [2020-10-26 19:47:52,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:47:52,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:47:52,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066800923] [2020-10-26 19:47:52,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:47:52,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:47:52,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:47:52,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:47:52,655 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 24 states. [2020-10-26 19:47:55,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:47:55,268 INFO L93 Difference]: Finished difference Result 415 states and 420 transitions. [2020-10-26 19:47:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:47:55,268 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 97 [2020-10-26 19:47:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:47:55,271 INFO L225 Difference]: With dead ends: 415 [2020-10-26 19:47:55,271 INFO L226 Difference]: Without dead ends: 360 [2020-10-26 19:47:55,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:47:55,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-26 19:47:55,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 106. [2020-10-26 19:47:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:47:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-26 19:47:55,291 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 97 [2020-10-26 19:47:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:47:55,292 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-26 19:47:55,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:47:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-26 19:47:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:47:55,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:47:55,293 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:47:55,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:47:55,293 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:47:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:47:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1469975150, now seen corresponding path program 21 times [2020-10-26 19:47:55,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:47:55,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281464377] [2020-10-26 19:47:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:47:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:47:55,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:47:55,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:00,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:00,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:48:00,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:00,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-26 19:48:00,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:00,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:48:00,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:00,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:48:00,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:00,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:00,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:00,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:00,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:00,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:00,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:00,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:00,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:00,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:00,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:00,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:48:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-26 19:48:00,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281464377] [2020-10-26 19:48:00,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:00,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:48:00,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318085966] [2020-10-26 19:48:00,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:48:00,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:00,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:48:00,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:48:00,938 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 25 states. [2020-10-26 19:48:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:03,698 INFO L93 Difference]: Finished difference Result 433 states and 438 transitions. [2020-10-26 19:48:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:48:03,699 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2020-10-26 19:48:03,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:03,701 INFO L225 Difference]: With dead ends: 433 [2020-10-26 19:48:03,702 INFO L226 Difference]: Without dead ends: 376 [2020-10-26 19:48:03,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:48:03,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-26 19:48:03,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 110. [2020-10-26 19:48:03,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:48:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-26 19:48:03,726 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 101 [2020-10-26 19:48:03,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:03,726 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-26 19:48:03,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:48:03,726 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-26 19:48:03,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:48:03,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:03,727 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:03,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:48:03,728 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:03,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1173267818, now seen corresponding path program 22 times [2020-10-26 19:48:03,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:03,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695699789] [2020-10-26 19:48:03,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:03,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:03,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:08,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:08,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:48:08,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:08,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:48:08,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:08,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:48:08,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:08,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:48:08,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:09,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:09,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:09,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:09,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:09,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:09,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:09,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:09,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-26 19:48:09,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695699789] [2020-10-26 19:48:09,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:09,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:48:09,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646813607] [2020-10-26 19:48:09,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:48:09,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:09,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:48:09,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:48:09,310 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 26 states. [2020-10-26 19:48:12,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:12,229 INFO L93 Difference]: Finished difference Result 451 states and 456 transitions. [2020-10-26 19:48:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:48:12,229 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 105 [2020-10-26 19:48:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:12,232 INFO L225 Difference]: With dead ends: 451 [2020-10-26 19:48:12,232 INFO L226 Difference]: Without dead ends: 392 [2020-10-26 19:48:12,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:48:12,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-26 19:48:12,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 114. [2020-10-26 19:48:12,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:48:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-26 19:48:12,252 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 105 [2020-10-26 19:48:12,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:12,252 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-26 19:48:12,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:48:12,253 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-26 19:48:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:48:12,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:12,254 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:12,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:48:12,254 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:12,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:12,255 INFO L82 PathProgramCache]: Analyzing trace with hash -257797530, now seen corresponding path program 23 times [2020-10-26 19:48:12,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:12,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251655770] [2020-10-26 19:48:12,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:12,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:12,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:17,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:17,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:48:17,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:17,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5176 [2020-10-26 19:48:17,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:17,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:48:17,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:17,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:48:17,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:18,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:18,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:18,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:18,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:18,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:18,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:18,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:18,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:18,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:18,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:18,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-26 19:48:18,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251655770] [2020-10-26 19:48:18,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:18,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:48:18,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294318100] [2020-10-26 19:48:18,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:48:18,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:18,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:48:18,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:48:18,026 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 27 states. [2020-10-26 19:48:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:21,061 INFO L93 Difference]: Finished difference Result 469 states and 474 transitions. [2020-10-26 19:48:21,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:48:21,062 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-10-26 19:48:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:21,065 INFO L225 Difference]: With dead ends: 469 [2020-10-26 19:48:21,065 INFO L226 Difference]: Without dead ends: 408 [2020-10-26 19:48:21,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:48:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-26 19:48:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 118. [2020-10-26 19:48:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:48:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-26 19:48:21,106 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 109 [2020-10-26 19:48:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:21,106 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-26 19:48:21,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:48:21,107 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-26 19:48:21,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:48:21,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:21,108 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:21,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:48:21,109 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:21,110 INFO L82 PathProgramCache]: Analyzing trace with hash -681307806, now seen corresponding path program 24 times [2020-10-26 19:48:21,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:21,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5749496] [2020-10-26 19:48:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:21,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:21,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:26,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:26,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:48:26,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:26,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:48:26,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:26,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:48:26,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:26,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:48:26,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:26,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:26,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:26,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:26,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:26,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:26,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:26,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:26,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:26,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:26,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:26,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-26 19:48:26,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5749496] [2020-10-26 19:48:26,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:26,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:48:26,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246223889] [2020-10-26 19:48:26,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:48:26,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:26,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:48:26,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:48:26,789 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 28 states. [2020-10-26 19:48:30,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:30,117 INFO L93 Difference]: Finished difference Result 487 states and 492 transitions. [2020-10-26 19:48:30,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:48:30,118 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 113 [2020-10-26 19:48:30,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:30,122 INFO L225 Difference]: With dead ends: 487 [2020-10-26 19:48:30,122 INFO L226 Difference]: Without dead ends: 424 [2020-10-26 19:48:30,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:48:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-26 19:48:30,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 122. [2020-10-26 19:48:30,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:48:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-26 19:48:30,149 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 113 [2020-10-26 19:48:30,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:30,149 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-26 19:48:30,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:48:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-26 19:48:30,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:48:30,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:30,150 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:30,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:48:30,151 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash -614538658, now seen corresponding path program 25 times [2020-10-26 19:48:30,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:30,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312387361] [2020-10-26 19:48:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:30,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:30,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:35,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:35,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 19:48:35,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:35,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 19:48:35,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:35,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:48:35,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:35,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:48:35,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:35,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:35,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:35,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:35,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:35,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:35,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:35,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:35,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:35,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:35,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:35,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-26 19:48:35,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312387361] [2020-10-26 19:48:35,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:35,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:48:35,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940612486] [2020-10-26 19:48:35,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:48:35,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:35,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:48:35,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:48:35,868 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 29 states. [2020-10-26 19:48:39,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:39,384 INFO L93 Difference]: Finished difference Result 505 states and 510 transitions. [2020-10-26 19:48:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:48:39,384 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 117 [2020-10-26 19:48:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:39,387 INFO L225 Difference]: With dead ends: 505 [2020-10-26 19:48:39,387 INFO L226 Difference]: Without dead ends: 440 [2020-10-26 19:48:39,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:48:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-10-26 19:48:39,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 126. [2020-10-26 19:48:39,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:48:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-26 19:48:39,412 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 117 [2020-10-26 19:48:39,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:39,412 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-26 19:48:39,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:48:39,413 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-26 19:48:39,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-26 19:48:39,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:39,414 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:39,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:48:39,414 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:39,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:39,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1086470822, now seen corresponding path program 26 times [2020-10-26 19:48:39,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:39,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816830481] [2020-10-26 19:48:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:39,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:39,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:48,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:48,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 19:48:48,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:48,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9480 [2020-10-26 19:48:48,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:48,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:48:48,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:48,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:48:48,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:49,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:49,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:49,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:49,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:49,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:49,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:48:49,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:49,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:49,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:49,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:49,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-26 19:48:49,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816830481] [2020-10-26 19:48:49,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:49,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:48:49,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013912846] [2020-10-26 19:48:49,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:48:49,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:49,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:48:49,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:48:49,618 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 30 states. [2020-10-26 19:48:53,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:53,434 INFO L93 Difference]: Finished difference Result 523 states and 528 transitions. [2020-10-26 19:48:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:48:53,435 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 121 [2020-10-26 19:48:53,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:53,437 INFO L225 Difference]: With dead ends: 523 [2020-10-26 19:48:53,437 INFO L226 Difference]: Without dead ends: 456 [2020-10-26 19:48:53,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:48:53,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-26 19:48:53,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 130. [2020-10-26 19:48:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:48:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-10-26 19:48:53,454 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 121 [2020-10-26 19:48:53,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:53,454 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-10-26 19:48:53,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:48:53,455 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-10-26 19:48:53,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-26 19:48:53,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:53,456 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:53,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:48:53,456 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1490306474, now seen corresponding path program 27 times [2020-10-26 19:48:53,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:53,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476686471] [2020-10-26 19:48:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:53,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:53,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:58,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:58,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 19:48:58,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:58,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-26 19:48:58,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:58,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:48:58,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:48:58,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:48:58,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:59,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:59,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:59,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:59,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:59,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:59,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:48:59,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:59,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:59,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:59,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:59,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-26 19:48:59,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476686471] [2020-10-26 19:48:59,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:59,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:48:59,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002278389] [2020-10-26 19:48:59,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:48:59,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:59,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:48:59,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:48:59,373 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 31 states. [2020-10-26 19:49:03,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:03,373 INFO L93 Difference]: Finished difference Result 541 states and 546 transitions. [2020-10-26 19:49:03,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-26 19:49:03,374 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-10-26 19:49:03,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:03,377 INFO L225 Difference]: With dead ends: 541 [2020-10-26 19:49:03,377 INFO L226 Difference]: Without dead ends: 472 [2020-10-26 19:49:03,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:49:03,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-10-26 19:49:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 134. [2020-10-26 19:49:03,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 19:49:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-10-26 19:49:03,402 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 125 [2020-10-26 19:49:03,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:03,402 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-10-26 19:49:03,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:49:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-10-26 19:49:03,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-26 19:49:03,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:03,404 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:03,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:49:03,404 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:03,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:03,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1730952878, now seen corresponding path program 28 times [2020-10-26 19:49:03,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:03,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289754741] [2020-10-26 19:49:03,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:03,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:08,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:08,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-26 19:49:08,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:08,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-26 19:49:08,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:08,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:49:08,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:49:08,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:49:08,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:09,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:09,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:09,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:09,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:09,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:09,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:49:09,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:09,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:09,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:09,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:09,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-26 19:49:09,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289754741] [2020-10-26 19:49:09,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:09,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:49:09,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935245078] [2020-10-26 19:49:09,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:49:09,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:09,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:49:09,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:49:09,343 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 32 states. [2020-10-26 19:49:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:13,555 INFO L93 Difference]: Finished difference Result 559 states and 564 transitions. [2020-10-26 19:49:13,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-26 19:49:13,556 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 129 [2020-10-26 19:49:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:13,559 INFO L225 Difference]: With dead ends: 559 [2020-10-26 19:49:13,559 INFO L226 Difference]: Without dead ends: 488 [2020-10-26 19:49:13,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 19:49:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-26 19:49:13,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 138. [2020-10-26 19:49:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:49:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-10-26 19:49:13,591 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 129 [2020-10-26 19:49:13,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:13,591 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-10-26 19:49:13,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:49:13,591 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-10-26 19:49:13,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-26 19:49:13,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:13,594 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:13,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:49:13,595 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:13,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:13,595 INFO L82 PathProgramCache]: Analyzing trace with hash -77538738, now seen corresponding path program 29 times [2020-10-26 19:49:13,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:13,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391394136] [2020-10-26 19:49:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:13,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:18,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:18,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 19:49:18,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:18,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:49:18,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:18,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:49:18,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:49:18,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:49:18,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:19,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:19,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:19,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:19,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:19,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:19,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:49:19,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:19,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:19,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:19,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:19,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-26 19:49:19,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391394136] [2020-10-26 19:49:19,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:19,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:49:19,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16470460] [2020-10-26 19:49:19,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:49:19,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:19,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:49:19,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:49:19,699 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 33 states. [2020-10-26 19:49:24,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:24,353 INFO L93 Difference]: Finished difference Result 577 states and 582 transitions. [2020-10-26 19:49:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-26 19:49:24,354 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 133 [2020-10-26 19:49:24,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:24,357 INFO L225 Difference]: With dead ends: 577 [2020-10-26 19:49:24,357 INFO L226 Difference]: Without dead ends: 504 [2020-10-26 19:49:24,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:49:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-10-26 19:49:24,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 142. [2020-10-26 19:49:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-26 19:49:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2020-10-26 19:49:24,386 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 133 [2020-10-26 19:49:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:24,386 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2020-10-26 19:49:24,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:49:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2020-10-26 19:49:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-26 19:49:24,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:24,387 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:24,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:49:24,388 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:24,388 INFO L82 PathProgramCache]: Analyzing trace with hash 394134858, now seen corresponding path program 30 times [2020-10-26 19:49:24,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:24,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526778659] [2020-10-26 19:49:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:24,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:24,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:29,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:29,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-26 19:49:29,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:29,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-26 19:49:29,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:49:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:49:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:49:29,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:30,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:30,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:30,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:30,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:30,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:30,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:30,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:30,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:30,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:30,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:30,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-26 19:49:30,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526778659] [2020-10-26 19:49:30,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:30,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:49:30,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506874130] [2020-10-26 19:49:30,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:49:30,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:30,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:49:30,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:49:30,376 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 34 states.