/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/eca-rers2012/Problem11_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:36:12,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:36:12,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:36:12,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:36:12,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:36:12,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:36:12,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:36:12,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:36:12,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:36:12,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:36:12,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:36:12,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:36:12,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:36:12,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:36:12,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:36:12,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:36:12,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:36:12,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:36:12,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:36:12,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:36:12,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:36:12,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:36:12,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:36:12,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:36:12,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:36:12,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:36:12,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:36:12,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:36:12,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:36:12,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:36:12,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:36:12,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:36:12,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:36:12,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:36:12,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:36:12,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:36:12,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:36:12,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:36:12,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:36:12,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:36:12,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:36:12,252 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 22:36:12,304 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:36:12,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:36:12,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:36:12,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:36:12,309 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:36:12,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:36:12,309 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:36:12,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:36:12,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:36:12,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:36:12,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:36:12,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:36:12,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:36:12,311 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:36:12,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:36:12,312 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:36:12,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:36:12,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:36:12,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:36:12,313 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:36:12,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:36:12,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:36:12,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:36:12,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:36:12,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:36:12,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:36:12,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:36:12,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:36:12,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:36:12,315 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:36:12,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:36:12,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:36:12,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:36:12,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:36:12,779 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:36:12,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label13.c [2020-10-26 22:36:12,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2581e098/6426f3e0501c467f95de6a7b970b5995/FLAGf6f8fa121 [2020-10-26 22:36:13,767 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:36:13,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem11_label13.c [2020-10-26 22:36:13,788 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2581e098/6426f3e0501c467f95de6a7b970b5995/FLAGf6f8fa121 [2020-10-26 22:36:13,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2581e098/6426f3e0501c467f95de6a7b970b5995 [2020-10-26 22:36:13,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:36:13,902 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:36:13,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:36:13,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:36:13,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:36:13,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:36:13" (1/1) ... [2020-10-26 22:36:13,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d306031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:36:13, skipping insertion in model container [2020-10-26 22:36:13,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:36:13" (1/1) ... [2020-10-26 22:36:13,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:36:14,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:36:14,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:36:14,737 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:36:14,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:36:14,963 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:36:14,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:36:14 WrapperNode [2020-10-26 22:36:14,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:36:14,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:36:14,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:36:14,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:36:14,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:36:14" (1/1) ... [2020-10-26 22:36:14,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:36:14" (1/1) ... [2020-10-26 22:36:15,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:36:14" (1/1) ... [2020-10-26 22:36:15,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:36:14" (1/1) ... [2020-10-26 22:36:15,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:36:14" (1/1) ... [2020-10-26 22:36:15,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:36:14" (1/1) ... [2020-10-26 22:36:15,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:36:14" (1/1) ... [2020-10-26 22:36:15,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:36:15,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:36:15,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:36:15,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:36:15,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:36:14" (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 22:36:15,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:36:15,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:36:15,258 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:36:15,259 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:36:15,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:36:15,260 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:36:15,260 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:36:15,260 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:36:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:36:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:36:15,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:36:15,262 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:36:15,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:36:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:36:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:36:15,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:36:15,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:36:15,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:36:15,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:36:17,240 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:36:17,240 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:36:17,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:36:17 BoogieIcfgContainer [2020-10-26 22:36:17,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:36:17,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:36:17,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:36:17,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:36:17,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:36:13" (1/3) ... [2020-10-26 22:36:17,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7baea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:36:17, skipping insertion in model container [2020-10-26 22:36:17,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:36:14" (2/3) ... [2020-10-26 22:36:17,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7baea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:36:17, skipping insertion in model container [2020-10-26 22:36:17,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:36:17" (3/3) ... [2020-10-26 22:36:17,252 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label13.c [2020-10-26 22:36:17,265 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:36:17,272 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:36:17,286 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:36:17,321 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:36:17,321 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:36:17,321 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:36:17,321 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:36:17,321 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:36:17,322 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:36:17,322 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:36:17,322 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:36:17,348 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states. [2020-10-26 22:36:17,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 22:36:17,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:17,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:17,385 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:17,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:17,396 INFO L82 PathProgramCache]: Analyzing trace with hash -2060137216, now seen corresponding path program 1 times [2020-10-26 22:36:17,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:17,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574237441] [2020-10-26 22:36:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:17,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:18,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:18,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 22:36:18,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:18,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-26 22:36:18,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:18,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:36:18,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:36:18,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 22:36:18,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:36:18,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:18,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:18,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:18,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:18,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:18,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 22:36:18,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:18,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:18,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:18,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:36:18,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:36:18,475 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 22:36:18,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574237441] [2020-10-26 22:36:18,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:36:18,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 22:36:18,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349598758] [2020-10-26 22:36:18,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:36:18,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:18,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:36:18,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:36:18,505 INFO L87 Difference]: Start difference. First operand 296 states. Second operand 5 states. [2020-10-26 22:36:23,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:23,552 INFO L93 Difference]: Finished difference Result 997 states and 1783 transitions. [2020-10-26 22:36:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:36:23,555 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-10-26 22:36:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:23,576 INFO L225 Difference]: With dead ends: 997 [2020-10-26 22:36:23,577 INFO L226 Difference]: Without dead ends: 631 [2020-10-26 22:36:23,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-10-26 22:36:23,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 625. [2020-10-26 22:36:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-10-26 22:36:23,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 865 transitions. [2020-10-26 22:36:23,723 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 865 transitions. Word has length 40 [2020-10-26 22:36:23,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:23,724 INFO L481 AbstractCegarLoop]: Abstraction has 625 states and 865 transitions. [2020-10-26 22:36:23,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:36:23,725 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 865 transitions. [2020-10-26 22:36:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 22:36:23,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:23,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:23,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:36:23,735 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:23,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:23,737 INFO L82 PathProgramCache]: Analyzing trace with hash -77116580, now seen corresponding path program 1 times [2020-10-26 22:36:23,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:23,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592029189] [2020-10-26 22:36:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:23,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:23,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:25,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:25,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:25,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-26 22:36:25,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:36:25,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2020 [2020-10-26 22:36:25,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:25,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:36:25,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:36:25,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 22:36:25,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:36:25,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:25,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:25,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:25,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:25,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:25,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 22:36:25,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:25,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:25,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:25,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:36:25,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:36:26,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:26,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:26,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:26,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:36:26,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:26,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-26 22:36:26,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:26,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:26,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:26,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:36:26,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:36:26,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592029189] [2020-10-26 22:36:26,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:36:26,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:36:26,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546629969] [2020-10-26 22:36:26,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:36:26,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:26,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:36:26,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:26,374 INFO L87 Difference]: Start difference. First operand 625 states and 865 transitions. Second operand 7 states. [2020-10-26 22:36:29,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:29,732 INFO L93 Difference]: Finished difference Result 1873 states and 2658 transitions. [2020-10-26 22:36:29,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:36:29,733 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2020-10-26 22:36:29,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:29,747 INFO L225 Difference]: With dead ends: 1873 [2020-10-26 22:36:29,747 INFO L226 Difference]: Without dead ends: 1254 [2020-10-26 22:36:29,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:36:29,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2020-10-26 22:36:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1216. [2020-10-26 22:36:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1216 states. [2020-10-26 22:36:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1619 transitions. [2020-10-26 22:36:29,841 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1619 transitions. Word has length 112 [2020-10-26 22:36:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:29,844 INFO L481 AbstractCegarLoop]: Abstraction has 1216 states and 1619 transitions. [2020-10-26 22:36:29,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:36:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1619 transitions. [2020-10-26 22:36:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 22:36:29,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:29,856 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:29,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:36:29,856 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:29,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:29,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1661763112, now seen corresponding path program 1 times [2020-10-26 22:36:29,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:29,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833200342] [2020-10-26 22:36:29,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:29,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:30,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:30,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:32,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:32,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-26 22:36:32,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:36:32,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2281 [2020-10-26 22:36:32,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:32,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:36:32,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:36:32,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 22:36:32,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:32,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:32,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:32,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:32,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:32,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:32,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 22:36:32,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:32,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:32,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:32,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:36:32,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:32,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:32,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:32,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:32,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:36:32,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:32,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-26 22:36:32,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:32,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:32,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:32,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:36:32,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:36:32,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833200342] [2020-10-26 22:36:32,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:36:32,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:36:32,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932800230] [2020-10-26 22:36:32,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:36:32,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:32,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:36:32,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:32,826 INFO L87 Difference]: Start difference. First operand 1216 states and 1619 transitions. Second operand 7 states. [2020-10-26 22:36:36,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:36,239 INFO L93 Difference]: Finished difference Result 3054 states and 4053 transitions. [2020-10-26 22:36:36,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:36:36,240 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2020-10-26 22:36:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:36,251 INFO L225 Difference]: With dead ends: 3054 [2020-10-26 22:36:36,252 INFO L226 Difference]: Without dead ends: 1844 [2020-10-26 22:36:36,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:36:36,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2020-10-26 22:36:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1812. [2020-10-26 22:36:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1812 states. [2020-10-26 22:36:36,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2280 transitions. [2020-10-26 22:36:36,318 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2280 transitions. Word has length 114 [2020-10-26 22:36:36,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:36,318 INFO L481 AbstractCegarLoop]: Abstraction has 1812 states and 2280 transitions. [2020-10-26 22:36:36,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:36:36,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2280 transitions. [2020-10-26 22:36:36,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-26 22:36:36,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:36,322 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:36,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:36:36,322 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:36,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:36,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1733634349, now seen corresponding path program 1 times [2020-10-26 22:36:36,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:36,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267470891] [2020-10-26 22:36:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:36,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:36,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:36,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-26 22:36:36,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:36,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-26 22:36:36,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:36,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:36,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:36:36,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 22:36:36,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:36:36,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:36,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:36,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:36,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:36,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:36,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 22:36:36,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:36,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:36,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:36,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:36,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:36,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:36,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:37,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:37,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:36:37,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:37,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-26 22:36:37,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:37,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:37,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:37,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:36:37,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:36:37,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267470891] [2020-10-26 22:36:37,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:37,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:36:37,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543730351] [2020-10-26 22:36:37,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:36:37,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:37,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:36:37,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:36:37,306 INFO L87 Difference]: Start difference. First operand 1812 states and 2280 transitions. Second operand 6 states. [2020-10-26 22:36:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:40,375 INFO L93 Difference]: Finished difference Result 4024 states and 5243 transitions. [2020-10-26 22:36:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:36:40,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 171 [2020-10-26 22:36:40,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:40,392 INFO L225 Difference]: With dead ends: 4024 [2020-10-26 22:36:40,393 INFO L226 Difference]: Without dead ends: 2596 [2020-10-26 22:36:40,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2020-10-26 22:36:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 2581. [2020-10-26 22:36:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2581 states. [2020-10-26 22:36:40,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 3304 transitions. [2020-10-26 22:36:40,484 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 3304 transitions. Word has length 171 [2020-10-26 22:36:40,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:40,485 INFO L481 AbstractCegarLoop]: Abstraction has 2581 states and 3304 transitions. [2020-10-26 22:36:40,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:36:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 3304 transitions. [2020-10-26 22:36:40,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-26 22:36:40,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:40,491 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:40,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:36:40,491 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:40,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:40,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1979624514, now seen corresponding path program 1 times [2020-10-26 22:36:40,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:40,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303832022] [2020-10-26 22:36:40,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:40,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:40,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:41,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:42,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:43,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:43,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-26 22:36:43,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:36:43,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2862 [2020-10-26 22:36:43,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:43,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:43,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-26 22:36:43,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 22:36:43,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:43,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:43,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:43,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:43,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:43,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:43,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:36:43,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:43,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:43,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:43,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:43,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:43,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:43,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:43,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:43,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:36:43,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:43,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 22:36:43,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:36:43,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:43,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:36:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:43,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:43,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:43,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:36:43,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:43,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-26 22:36:43,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:36:43,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:36:44,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303832022] [2020-10-26 22:36:44,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:44,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:36:44,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563185231] [2020-10-26 22:36:44,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:36:44,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:44,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:36:44,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:36:44,158 INFO L87 Difference]: Start difference. First operand 2581 states and 3304 transitions. Second operand 8 states. [2020-10-26 22:36:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:49,333 INFO L93 Difference]: Finished difference Result 5605 states and 7370 transitions. [2020-10-26 22:36:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 22:36:49,334 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 236 [2020-10-26 22:36:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:49,355 INFO L225 Difference]: With dead ends: 5605 [2020-10-26 22:36:49,355 INFO L226 Difference]: Without dead ends: 3408 [2020-10-26 22:36:49,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 22:36:49,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2020-10-26 22:36:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 3362. [2020-10-26 22:36:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3362 states. [2020-10-26 22:36:49,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3362 states to 3362 states and 4200 transitions. [2020-10-26 22:36:49,462 INFO L78 Accepts]: Start accepts. Automaton has 3362 states and 4200 transitions. Word has length 236 [2020-10-26 22:36:49,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:49,463 INFO L481 AbstractCegarLoop]: Abstraction has 3362 states and 4200 transitions. [2020-10-26 22:36:49,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:36:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3362 states and 4200 transitions. [2020-10-26 22:36:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-26 22:36:49,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:49,468 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:49,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:36:49,469 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:49,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:49,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1727525773, now seen corresponding path program 1 times [2020-10-26 22:36:49,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:49,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786055942] [2020-10-26 22:36:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:49,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:49,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:51,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:51,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-26 22:36:51,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:36:51,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1648 [2020-10-26 22:36:51,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:51,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:51,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:36:51,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:36:51,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:51,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:36:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:51,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:51,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:51,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:36:51,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:51,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:36:51,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:51,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:36:51,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:51,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:36:51,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:51,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:36:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:51,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:51,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:51,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:36:51,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:51,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-26 22:36:51,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:51,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:36:51,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:36:51,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:36:51,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:51,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:36:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:51,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:51,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:36:51,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 22:36:51,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:36:51,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-26 22:36:51,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:36:51,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:36:51,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:36:51,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 22:36:51,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:36:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:36:51,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786055942] [2020-10-26 22:36:51,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:36:51,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:36:51,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694400341] [2020-10-26 22:36:51,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:36:51,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:36:51,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:36:51,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:36:51,837 INFO L87 Difference]: Start difference. First operand 3362 states and 4200 transitions. Second operand 7 states. [2020-10-26 22:36:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:36:55,397 INFO L93 Difference]: Finished difference Result 6409 states and 8086 transitions. [2020-10-26 22:36:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:36:55,398 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 241 [2020-10-26 22:36:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:36:55,416 INFO L225 Difference]: With dead ends: 6409 [2020-10-26 22:36:55,417 INFO L226 Difference]: Without dead ends: 3431 [2020-10-26 22:36:55,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:36:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2020-10-26 22:36:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 3396. [2020-10-26 22:36:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3396 states. [2020-10-26 22:36:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 4215 transitions. [2020-10-26 22:36:55,532 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 4215 transitions. Word has length 241 [2020-10-26 22:36:55,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:36:55,533 INFO L481 AbstractCegarLoop]: Abstraction has 3396 states and 4215 transitions. [2020-10-26 22:36:55,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:36:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 4215 transitions. [2020-10-26 22:36:55,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-26 22:36:55,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:36:55,539 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:36:55,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:36:55,539 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:36:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:36:55,540 INFO L82 PathProgramCache]: Analyzing trace with hash -869315679, now seen corresponding path program 1 times [2020-10-26 22:36:55,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:36:55,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153210742] [2020-10-26 22:36:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:36:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:36:55,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:55,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:55,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:57,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:58,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:36:59,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:00,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:00,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-26 22:37:00,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 22:37:00,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-26 22:37:00,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:00,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:37:00,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:37:00,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-26 22:37:00,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:37:00,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:00,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:00,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:00,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:00,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:00,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 22:37:00,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:37:00,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:37:00,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:00,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:01,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:01,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:01,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:37:01,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:01,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-26 22:37:01,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:01,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:01,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:01,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-26 22:37:01,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:37:01,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:37:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:01,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:01,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:01,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:37:01,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:01,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 22:37:01,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:01,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:01,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-26 22:37:01,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:01,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:37:01,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153210742] [2020-10-26 22:37:01,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:01,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:37:01,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427125997] [2020-10-26 22:37:01,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:37:02,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:02,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:37:02,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:37:02,002 INFO L87 Difference]: Start difference. First operand 3396 states and 4215 transitions. Second operand 7 states. [2020-10-26 22:37:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:05,513 INFO L93 Difference]: Finished difference Result 7253 states and 9362 transitions. [2020-10-26 22:37:05,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 22:37:05,515 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 251 [2020-10-26 22:37:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:05,537 INFO L225 Difference]: With dead ends: 7253 [2020-10-26 22:37:05,538 INFO L226 Difference]: Without dead ends: 4241 [2020-10-26 22:37:05,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:37:05,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2020-10-26 22:37:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 4200. [2020-10-26 22:37:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4200 states. [2020-10-26 22:37:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 5213 transitions. [2020-10-26 22:37:05,714 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 5213 transitions. Word has length 251 [2020-10-26 22:37:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:05,715 INFO L481 AbstractCegarLoop]: Abstraction has 4200 states and 5213 transitions. [2020-10-26 22:37:05,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:37:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 5213 transitions. [2020-10-26 22:37:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-26 22:37:05,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:05,722 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:05,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:37:05,722 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:05,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1969497902, now seen corresponding path program 1 times [2020-10-26 22:37:05,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:05,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452661330] [2020-10-26 22:37:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:05,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:06,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:06,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:07,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:07,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-26 22:37:07,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:37:07,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2079 [2020-10-26 22:37:07,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:07,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:07,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-26 22:37:07,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 22:37:07,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:08,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:08,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:08,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:08,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:08,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:08,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:37:08,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:08,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:08,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:08,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:08,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:08,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:08,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:08,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:08,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:37:08,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:08,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 22:37:08,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:08,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:08,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:08,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:37:08,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:08,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:37:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:08,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:08,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:08,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 22:37:08,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:08,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-26 22:37:08,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:08,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:08,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:08,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 22:37:08,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:37:08,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452661330] [2020-10-26 22:37:08,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:08,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:37:08,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562514128] [2020-10-26 22:37:08,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:37:08,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:08,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:37:08,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:37:08,679 INFO L87 Difference]: Start difference. First operand 4200 states and 5213 transitions. Second operand 7 states. [2020-10-26 22:37:12,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:12,416 INFO L93 Difference]: Finished difference Result 10428 states and 13387 transitions. [2020-10-26 22:37:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:37:12,417 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 257 [2020-10-26 22:37:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:12,452 INFO L225 Difference]: With dead ends: 10428 [2020-10-26 22:37:12,452 INFO L226 Difference]: Without dead ends: 6612 [2020-10-26 22:37:12,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:37:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6612 states. [2020-10-26 22:37:12,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6612 to 6390. [2020-10-26 22:37:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6390 states. [2020-10-26 22:37:12,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6390 states to 6390 states and 8100 transitions. [2020-10-26 22:37:12,689 INFO L78 Accepts]: Start accepts. Automaton has 6390 states and 8100 transitions. Word has length 257 [2020-10-26 22:37:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:12,690 INFO L481 AbstractCegarLoop]: Abstraction has 6390 states and 8100 transitions. [2020-10-26 22:37:12,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:37:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 6390 states and 8100 transitions. [2020-10-26 22:37:12,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-26 22:37:12,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:12,697 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:12,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:37:12,698 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:12,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:12,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2059579970, now seen corresponding path program 1 times [2020-10-26 22:37:12,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:12,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608486203] [2020-10-26 22:37:12,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:12,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:13,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:13,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:13,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-26 22:37:13,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:13,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1203 [2020-10-26 22:37:13,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:13,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:13,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-10-26 22:37:13,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 22:37:13,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:14,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:14,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:14,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:14,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:14,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:14,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:37:14,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:14,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:14,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:14,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:14,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:14,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:14,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:14,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:14,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:37:14,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:14,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-26 22:37:14,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:14,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:14,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:14,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:14,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:14,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:37:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:14,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:14,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:14,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 22:37:14,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:14,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-26 22:37:14,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:14,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:14,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:14,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 22:37:14,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-26 22:37:14,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608486203] [2020-10-26 22:37:14,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:14,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:37:14,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981675591] [2020-10-26 22:37:14,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:37:14,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:14,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:37:14,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:37:14,671 INFO L87 Difference]: Start difference. First operand 6390 states and 8100 transitions. Second operand 5 states. [2020-10-26 22:37:15,874 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-26 22:37:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:16,872 INFO L93 Difference]: Finished difference Result 11264 states and 14399 transitions. [2020-10-26 22:37:16,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:37:16,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 267 [2020-10-26 22:37:16,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:16,911 INFO L225 Difference]: With dead ends: 11264 [2020-10-26 22:37:16,912 INFO L226 Difference]: Without dead ends: 6406 [2020-10-26 22:37:16,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:37:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6406 states. [2020-10-26 22:37:17,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6406 to 6388. [2020-10-26 22:37:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6388 states. [2020-10-26 22:37:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6388 states to 6388 states and 8075 transitions. [2020-10-26 22:37:17,095 INFO L78 Accepts]: Start accepts. Automaton has 6388 states and 8075 transitions. Word has length 267 [2020-10-26 22:37:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:17,096 INFO L481 AbstractCegarLoop]: Abstraction has 6388 states and 8075 transitions. [2020-10-26 22:37:17,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:37:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 6388 states and 8075 transitions. [2020-10-26 22:37:17,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-26 22:37:17,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:17,103 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:17,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:37:17,104 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:17,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1606418838, now seen corresponding path program 1 times [2020-10-26 22:37:17,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:17,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566087718] [2020-10-26 22:37:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:17,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:17,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:18,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:18,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:19,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:19,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-26 22:37:19,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:37:19,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2204 [2020-10-26 22:37:19,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:19,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:37:19,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-26 22:37:19,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-26 22:37:19,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:37:19,604 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 22:37:19,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:19,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:19,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:19,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:19,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:19,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 22:37:19,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:19,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:19,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:19,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:19,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:37:19,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:19,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:19,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:19,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 22:37:19,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:19,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-26 22:37:19,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:19,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:19,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:19,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:37:19,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:20,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 22:37:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:20,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:20,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:20,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:20,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:37:20,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:20,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-26 22:37:20,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:20,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:20,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:20,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:37:20,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:37:20,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566087718] [2020-10-26 22:37:20,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:20,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:37:20,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014666157] [2020-10-26 22:37:20,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:37:20,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:20,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:37:20,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:37:20,319 INFO L87 Difference]: Start difference. First operand 6388 states and 8075 transitions. Second operand 6 states. [2020-10-26 22:37:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:23,463 INFO L93 Difference]: Finished difference Result 13961 states and 18012 transitions. [2020-10-26 22:37:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:37:23,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 267 [2020-10-26 22:37:23,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:23,489 INFO L225 Difference]: With dead ends: 13961 [2020-10-26 22:37:23,489 INFO L226 Difference]: Without dead ends: 7957 [2020-10-26 22:37:23,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:37:23,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7957 states. [2020-10-26 22:37:23,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7957 to 7938. [2020-10-26 22:37:23,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7938 states. [2020-10-26 22:37:23,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7938 states to 7938 states and 9905 transitions. [2020-10-26 22:37:23,688 INFO L78 Accepts]: Start accepts. Automaton has 7938 states and 9905 transitions. Word has length 267 [2020-10-26 22:37:23,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:23,688 INFO L481 AbstractCegarLoop]: Abstraction has 7938 states and 9905 transitions. [2020-10-26 22:37:23,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:37:23,689 INFO L276 IsEmpty]: Start isEmpty. Operand 7938 states and 9905 transitions. [2020-10-26 22:37:23,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-10-26 22:37:23,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:23,698 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:23,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 22:37:23,699 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:23,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:23,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1941437445, now seen corresponding path program 1 times [2020-10-26 22:37:23,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:23,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909123953] [2020-10-26 22:37:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:23,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:23,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:24,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:25,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:25,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 292 [2020-10-26 22:37:25,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:37:25,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1897 [2020-10-26 22:37:25,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:25,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:25,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:37:25,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:37:25,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:25,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:25,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:25,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:25,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:25,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:25,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:37:25,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:25,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:25,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:25,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:25,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:25,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:25,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:37:25,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:25,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-26 22:37:25,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:25,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:25,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:25,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:37:25,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:25,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:37:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:26,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:26,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:26,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 22:37:26,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:26,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-26 22:37:26,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:26,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:26,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:26,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 22:37:26,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:37:26,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909123953] [2020-10-26 22:37:26,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:26,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:37:26,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285391337] [2020-10-26 22:37:26,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:37:26,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:26,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:37:26,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:37:26,316 INFO L87 Difference]: Start difference. First operand 7938 states and 9905 transitions. Second operand 7 states. [2020-10-26 22:37:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:29,896 INFO L93 Difference]: Finished difference Result 16831 states and 21440 transitions. [2020-10-26 22:37:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:37:29,898 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 278 [2020-10-26 22:37:29,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:29,939 INFO L225 Difference]: With dead ends: 16831 [2020-10-26 22:37:29,939 INFO L226 Difference]: Without dead ends: 10447 [2020-10-26 22:37:29,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:37:29,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10447 states. [2020-10-26 22:37:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10447 to 10240. [2020-10-26 22:37:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10240 states. [2020-10-26 22:37:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10240 states to 10240 states and 13066 transitions. [2020-10-26 22:37:30,238 INFO L78 Accepts]: Start accepts. Automaton has 10240 states and 13066 transitions. Word has length 278 [2020-10-26 22:37:30,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:30,239 INFO L481 AbstractCegarLoop]: Abstraction has 10240 states and 13066 transitions. [2020-10-26 22:37:30,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:37:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 10240 states and 13066 transitions. [2020-10-26 22:37:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-26 22:37:30,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:30,250 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:30,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 22:37:30,251 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:30,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2030449628, now seen corresponding path program 1 times [2020-10-26 22:37:30,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:30,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157431396] [2020-10-26 22:37:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:30,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:30,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:32,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:32,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-26 22:37:32,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:32,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1782 [2020-10-26 22:37:32,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:32,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:32,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:37:32,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 22:37:32,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:32,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:32,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:32,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:32,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:32,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:32,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:37:32,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:32,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:32,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:32,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:32,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:32,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:32,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:32,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:32,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:37:32,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:32,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-26 22:37:32,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:32,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:32,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:32,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:37:32,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:32,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:37:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:32,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:32,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:32,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 22:37:32,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:32,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-26 22:37:32,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:32,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:32,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:32,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:37:32,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:37:32,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157431396] [2020-10-26 22:37:32,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:32,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:37:32,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960541123] [2020-10-26 22:37:32,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:37:32,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:32,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:37:32,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:37:32,921 INFO L87 Difference]: Start difference. First operand 10240 states and 13066 transitions. Second operand 7 states. [2020-10-26 22:37:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:37,710 INFO L93 Difference]: Finished difference Result 22260 states and 28604 transitions. [2020-10-26 22:37:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:37:37,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 281 [2020-10-26 22:37:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:37,751 INFO L225 Difference]: With dead ends: 22260 [2020-10-26 22:37:37,751 INFO L226 Difference]: Without dead ends: 12404 [2020-10-26 22:37:37,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:37:37,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12404 states. [2020-10-26 22:37:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12404 to 12190. [2020-10-26 22:37:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12190 states. [2020-10-26 22:37:38,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12190 states to 12190 states and 15326 transitions. [2020-10-26 22:37:38,050 INFO L78 Accepts]: Start accepts. Automaton has 12190 states and 15326 transitions. Word has length 281 [2020-10-26 22:37:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:38,051 INFO L481 AbstractCegarLoop]: Abstraction has 12190 states and 15326 transitions. [2020-10-26 22:37:38,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:37:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 12190 states and 15326 transitions. [2020-10-26 22:37:38,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-10-26 22:37:38,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:38,060 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:38,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 22:37:38,061 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:38,061 INFO L82 PathProgramCache]: Analyzing trace with hash 993788955, now seen corresponding path program 1 times [2020-10-26 22:37:38,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:38,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317986856] [2020-10-26 22:37:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:38,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:38,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:39,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:39,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-26 22:37:39,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:39,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1440 [2020-10-26 22:37:39,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:39,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:39,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 140 [2020-10-26 22:37:39,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-26 22:37:39,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:39,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:39,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:39,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:39,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:39,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:39,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:37:39,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:39,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:37:39,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:39,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:37:39,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:39,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:39,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:39,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:39,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:37:39,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:39,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-26 22:37:39,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:39,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:39,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:37:39,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:39,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:37:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:39,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:40,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:40,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 22:37:40,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:40,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-26 22:37:40,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:40,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:40,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:40,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 22:37:40,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:37:40,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317986856] [2020-10-26 22:37:40,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:40,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:37:40,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148056090] [2020-10-26 22:37:40,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:37:40,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:40,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:37:40,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:37:40,262 INFO L87 Difference]: Start difference. First operand 12190 states and 15326 transitions. Second operand 7 states. [2020-10-26 22:37:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:44,745 INFO L93 Difference]: Finished difference Result 26162 states and 33780 transitions. [2020-10-26 22:37:44,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:37:44,752 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 284 [2020-10-26 22:37:44,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:44,811 INFO L225 Difference]: With dead ends: 26162 [2020-10-26 22:37:44,811 INFO L226 Difference]: Without dead ends: 14356 [2020-10-26 22:37:44,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:37:44,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14356 states. [2020-10-26 22:37:45,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14356 to 14246. [2020-10-26 22:37:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14246 states. [2020-10-26 22:37:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14246 states to 14246 states and 17345 transitions. [2020-10-26 22:37:45,216 INFO L78 Accepts]: Start accepts. Automaton has 14246 states and 17345 transitions. Word has length 284 [2020-10-26 22:37:45,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:45,216 INFO L481 AbstractCegarLoop]: Abstraction has 14246 states and 17345 transitions. [2020-10-26 22:37:45,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:37:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 14246 states and 17345 transitions. [2020-10-26 22:37:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-26 22:37:45,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:45,225 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:45,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 22:37:45,226 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:45,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:45,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1115605102, now seen corresponding path program 1 times [2020-10-26 22:37:45,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:45,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310174160] [2020-10-26 22:37:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:45,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:45,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:45,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:45,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:46,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:47,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:49,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:50,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:50,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-26 22:37:50,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 22:37:50,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 22:37:50,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:50,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 22:37:50,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:37:50,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 316 [2020-10-26 22:37:50,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:50,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:37:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:50,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:50,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:50,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:37:50,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:50,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 22:37:50,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:50,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:37:50,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:37:50,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:37:50,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:50,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:37:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:50,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:50,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:50,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:50,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:37:50,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:50,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-26 22:37:50,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:50,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:50,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:50,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 22:37:50,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:50,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:37:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:50,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:51,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:51,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:37:51,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:37:51,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-26 22:37:51,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:51,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:37:51,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:51,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:37:51,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:51,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-10-26 22:37:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:51,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:51,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:51,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:37:51,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:37:51,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:37:51,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 22:37:51,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:37:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:37:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:37:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:37:51,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:37:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 66 proven. 246 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 22:37:51,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310174160] [2020-10-26 22:37:51,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:37:51,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 22:37:51,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426857494] [2020-10-26 22:37:51,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 22:37:51,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:37:51,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 22:37:51,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:37:51,457 INFO L87 Difference]: Start difference. First operand 14246 states and 17345 transitions. Second operand 10 states. [2020-10-26 22:37:56,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:37:56,102 INFO L93 Difference]: Finished difference Result 27540 states and 34260 transitions. [2020-10-26 22:37:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 22:37:56,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 309 [2020-10-26 22:37:56,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:37:56,163 INFO L225 Difference]: With dead ends: 27540 [2020-10-26 22:37:56,163 INFO L226 Difference]: Without dead ends: 15988 [2020-10-26 22:37:56,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-10-26 22:37:56,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15988 states. [2020-10-26 22:37:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15988 to 15420. [2020-10-26 22:37:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15420 states. [2020-10-26 22:37:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15420 states to 15420 states and 18688 transitions. [2020-10-26 22:37:56,591 INFO L78 Accepts]: Start accepts. Automaton has 15420 states and 18688 transitions. Word has length 309 [2020-10-26 22:37:56,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:37:56,592 INFO L481 AbstractCegarLoop]: Abstraction has 15420 states and 18688 transitions. [2020-10-26 22:37:56,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 22:37:56,592 INFO L276 IsEmpty]: Start isEmpty. Operand 15420 states and 18688 transitions. [2020-10-26 22:37:56,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-26 22:37:56,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:37:56,605 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:37:56,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 22:37:56,605 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:37:56,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:37:56,606 INFO L82 PathProgramCache]: Analyzing trace with hash 2089758479, now seen corresponding path program 1 times [2020-10-26 22:37:56,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:37:56,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413173861] [2020-10-26 22:37:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:37:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:37:56,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:56,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:56,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:37:58,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:00,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:01,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:01,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 355 [2020-10-26 22:38:01,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:38:01,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 22:38:01,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:01,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 22:38:01,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:38:01,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-26 22:38:01,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:01,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:01,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:01,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:01,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:01,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:01,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 22:38:01,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:01,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:01,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:01,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:38:01,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:01,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:01,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:02,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:02,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:38:02,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:02,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-26 22:38:02,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:02,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:02,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:02,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 22:38:02,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:02,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:38:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:02,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:02,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:02,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 22:38:02,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:02,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 22:38:02,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:38:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:02,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 22:38:02,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:02,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-10-26 22:38:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:02,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:02,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:02,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:02,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 22:38:02,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:02,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-26 22:38:02,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:38:02,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 104 proven. 176 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-26 22:38:03,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413173861] [2020-10-26 22:38:03,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:03,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:38:03,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046070739] [2020-10-26 22:38:03,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 22:38:03,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:03,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 22:38:03,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-26 22:38:03,314 INFO L87 Difference]: Start difference. First operand 15420 states and 18688 transitions. Second operand 9 states. [2020-10-26 22:38:03,509 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-10-26 22:38:04,508 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-26 22:38:05,161 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-26 22:38:05,377 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-26 22:38:05,784 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-26 22:38:06,246 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-10-26 22:38:06,701 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2020-10-26 22:38:08,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:08,558 INFO L93 Difference]: Finished difference Result 28219 states and 34375 transitions. [2020-10-26 22:38:08,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 22:38:08,560 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 339 [2020-10-26 22:38:08,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:08,604 INFO L225 Difference]: With dead ends: 28219 [2020-10-26 22:38:08,605 INFO L226 Difference]: Without dead ends: 15461 [2020-10-26 22:38:08,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-10-26 22:38:08,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15461 states. [2020-10-26 22:38:08,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15461 to 15425. [2020-10-26 22:38:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15425 states. [2020-10-26 22:38:08,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15425 states to 15425 states and 18632 transitions. [2020-10-26 22:38:08,980 INFO L78 Accepts]: Start accepts. Automaton has 15425 states and 18632 transitions. Word has length 339 [2020-10-26 22:38:08,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:08,981 INFO L481 AbstractCegarLoop]: Abstraction has 15425 states and 18632 transitions. [2020-10-26 22:38:08,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 22:38:08,981 INFO L276 IsEmpty]: Start isEmpty. Operand 15425 states and 18632 transitions. [2020-10-26 22:38:08,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-10-26 22:38:08,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:08,995 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:08,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 22:38:08,995 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:08,996 INFO L82 PathProgramCache]: Analyzing trace with hash -30195945, now seen corresponding path program 1 times [2020-10-26 22:38:08,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:08,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516762101] [2020-10-26 22:38:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:09,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:09,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:09,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:10,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:14,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:14,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-26 22:38:14,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:38:14,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 22:38:14,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:14,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:14,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-26 22:38:14,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 22:38:14,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:14,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:14,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:14,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:14,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:14,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:14,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:38:14,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:14,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:14,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:14,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:14,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:14,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:14,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:14,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:14,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:38:14,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:14,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 22:38:14,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:14,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:14,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:14,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:38:14,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:14,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:38:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:14,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:14,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:14,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 22:38:14,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:14,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-26 22:38:14,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:14,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:14,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:14,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 22:38:14,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:14,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-10-26 22:38:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:14,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:14,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:14,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 22:38:14,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:14,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 22:38:14,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:14,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:14,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 108 [2020-10-26 22:38:14,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:14,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 171 proven. 73 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 22:38:14,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516762101] [2020-10-26 22:38:14,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:14,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:38:14,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862028743] [2020-10-26 22:38:14,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:38:14,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:38:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:38:14,815 INFO L87 Difference]: Start difference. First operand 15425 states and 18632 transitions. Second operand 7 states. [2020-10-26 22:38:18,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:18,524 INFO L93 Difference]: Finished difference Result 28360 states and 34396 transitions. [2020-10-26 22:38:18,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:38:18,525 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 340 [2020-10-26 22:38:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:18,564 INFO L225 Difference]: With dead ends: 28360 [2020-10-26 22:38:18,565 INFO L226 Difference]: Without dead ends: 15633 [2020-10-26 22:38:18,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:38:18,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15633 states. [2020-10-26 22:38:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15633 to 15613. [2020-10-26 22:38:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15613 states. [2020-10-26 22:38:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15613 states to 15613 states and 18803 transitions. [2020-10-26 22:38:18,922 INFO L78 Accepts]: Start accepts. Automaton has 15613 states and 18803 transitions. Word has length 340 [2020-10-26 22:38:18,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:18,923 INFO L481 AbstractCegarLoop]: Abstraction has 15613 states and 18803 transitions. [2020-10-26 22:38:18,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:38:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 15613 states and 18803 transitions. [2020-10-26 22:38:18,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-10-26 22:38:18,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:18,935 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:18,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 22:38:18,936 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:18,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:18,936 INFO L82 PathProgramCache]: Analyzing trace with hash -739984674, now seen corresponding path program 1 times [2020-10-26 22:38:18,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:18,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011217865] [2020-10-26 22:38:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:19,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:19,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:19,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:20,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:20,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:23,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:24,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:24,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 356 [2020-10-26 22:38:24,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 22:38:24,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 22:38:24,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:24,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 22:38:24,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:38:24,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 310 [2020-10-26 22:38:24,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:24,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:24,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:24,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:24,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:24,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:24,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 22:38:24,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:24,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:24,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:24,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:38:24,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:24,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:24,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:24,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:24,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:38:24,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:24,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-26 22:38:24,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:24,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:24,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:24,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-26 22:38:24,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:24,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:38:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:24,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:24,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:24,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 22:38:24,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:24,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-26 22:38:24,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:24,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:38:24,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:24,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 22:38:24,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:24,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-10-26 22:38:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:24,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:24,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:24,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 22:38:24,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:24,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-26 22:38:24,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:24,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:24,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:24,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:38:24,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 171 proven. 100 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-26 22:38:25,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011217865] [2020-10-26 22:38:25,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:25,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 22:38:25,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234109313] [2020-10-26 22:38:25,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 22:38:25,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:25,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 22:38:25,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:38:25,027 INFO L87 Difference]: Start difference. First operand 15613 states and 18803 transitions. Second operand 10 states. [2020-10-26 22:38:25,242 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-26 22:38:26,199 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-26 22:38:28,661 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-10-26 22:38:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:30,775 INFO L93 Difference]: Finished difference Result 32141 states and 39539 transitions. [2020-10-26 22:38:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 22:38:30,776 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 340 [2020-10-26 22:38:30,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:30,810 INFO L225 Difference]: With dead ends: 32141 [2020-10-26 22:38:30,811 INFO L226 Difference]: Without dead ends: 19226 [2020-10-26 22:38:30,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-26 22:38:30,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19226 states. [2020-10-26 22:38:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19226 to 18946. [2020-10-26 22:38:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18946 states. [2020-10-26 22:38:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18946 states to 18946 states and 22573 transitions. [2020-10-26 22:38:31,216 INFO L78 Accepts]: Start accepts. Automaton has 18946 states and 22573 transitions. Word has length 340 [2020-10-26 22:38:31,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:31,217 INFO L481 AbstractCegarLoop]: Abstraction has 18946 states and 22573 transitions. [2020-10-26 22:38:31,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 22:38:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand 18946 states and 22573 transitions. [2020-10-26 22:38:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-10-26 22:38:31,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:31,230 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:31,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 22:38:31,230 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:31,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:31,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1571015387, now seen corresponding path program 1 times [2020-10-26 22:38:31,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:31,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833829646] [2020-10-26 22:38:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:31,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:31,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:31,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:31,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:31,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:32,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:32,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:32,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 360 [2020-10-26 22:38:32,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 22:38:32,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1531 [2020-10-26 22:38:32,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:32,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:32,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:38:32,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 313 [2020-10-26 22:38:32,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:32,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:32,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:32,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:32,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:32,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:32,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 22:38:32,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:32,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:38:32,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:33,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:33,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:33,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:33,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:33,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:38:33,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:33,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-26 22:38:33,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:33,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:33,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:33,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-26 22:38:33,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:33,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:38:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:33,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:33,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:33,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:33,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 22:38:33,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:33,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-26 22:38:33,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:33,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:33,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-10-26 22:38:33,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:38:33,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-26 22:38:33,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833829646] [2020-10-26 22:38:33,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:38:33,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 22:38:33,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006626507] [2020-10-26 22:38:33,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:38:33,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:33,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:38:33,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:38:33,557 INFO L87 Difference]: Start difference. First operand 18946 states and 22573 transitions. Second operand 5 states. [2020-10-26 22:38:33,709 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 22:38:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:35,865 INFO L93 Difference]: Finished difference Result 34212 states and 40927 transitions. [2020-10-26 22:38:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:38:35,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 346 [2020-10-26 22:38:35,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:35,901 INFO L225 Difference]: With dead ends: 34212 [2020-10-26 22:38:35,901 INFO L226 Difference]: Without dead ends: 18378 [2020-10-26 22:38:35,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:38:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18378 states. [2020-10-26 22:38:36,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18378 to 18345. [2020-10-26 22:38:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18345 states. [2020-10-26 22:38:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18345 states to 18345 states and 21817 transitions. [2020-10-26 22:38:36,265 INFO L78 Accepts]: Start accepts. Automaton has 18345 states and 21817 transitions. Word has length 346 [2020-10-26 22:38:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:36,266 INFO L481 AbstractCegarLoop]: Abstraction has 18345 states and 21817 transitions. [2020-10-26 22:38:36,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:38:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 18345 states and 21817 transitions. [2020-10-26 22:38:36,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-26 22:38:36,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:36,280 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:36,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 22:38:36,280 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:36,281 INFO L82 PathProgramCache]: Analyzing trace with hash -484514045, now seen corresponding path program 1 times [2020-10-26 22:38:36,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:36,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955781777] [2020-10-26 22:38:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:36,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:36,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:36,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:39,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:39,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 366 [2020-10-26 22:38:39,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:38:39,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2636 [2020-10-26 22:38:39,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:39,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:39,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-26 22:38:39,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-26 22:38:39,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:39,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:39,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:39,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:39,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:39,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:39,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:38:39,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:39,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:39,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:39,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:39,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:39,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:39,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:39,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:39,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:38:39,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:39,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-26 22:38:39,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:39,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:39,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:39,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:39,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:39,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:38:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:39,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:39,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:39,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 22:38:39,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:39,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 22:38:39,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:39,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 22:38:39,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:39,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-26 22:38:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:39,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:39,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:39,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 22:38:39,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:39,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-26 22:38:39,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:38:39,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 289 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-26 22:38:39,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955781777] [2020-10-26 22:38:39,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:39,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:38:39,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98486103] [2020-10-26 22:38:39,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:38:39,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:39,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:38:39,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:38:39,888 INFO L87 Difference]: Start difference. First operand 18345 states and 21817 transitions. Second operand 7 states. [2020-10-26 22:38:44,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:44,080 INFO L93 Difference]: Finished difference Result 36363 states and 43270 transitions. [2020-10-26 22:38:44,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:38:44,082 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 350 [2020-10-26 22:38:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:44,125 INFO L225 Difference]: With dead ends: 36363 [2020-10-26 22:38:44,125 INFO L226 Difference]: Without dead ends: 18402 [2020-10-26 22:38:44,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:38:44,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18402 states. [2020-10-26 22:38:44,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18402 to 18365. [2020-10-26 22:38:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18365 states. [2020-10-26 22:38:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18365 states to 18365 states and 21332 transitions. [2020-10-26 22:38:44,410 INFO L78 Accepts]: Start accepts. Automaton has 18365 states and 21332 transitions. Word has length 350 [2020-10-26 22:38:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:44,410 INFO L481 AbstractCegarLoop]: Abstraction has 18365 states and 21332 transitions. [2020-10-26 22:38:44,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:38:44,411 INFO L276 IsEmpty]: Start isEmpty. Operand 18365 states and 21332 transitions. [2020-10-26 22:38:44,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-10-26 22:38:44,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:44,423 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:44,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 22:38:44,423 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:44,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:44,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1113254730, now seen corresponding path program 1 times [2020-10-26 22:38:44,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:44,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681869383] [2020-10-26 22:38:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:44,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:44,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:46,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:46,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-26 22:38:46,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:46,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1793 [2020-10-26 22:38:46,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:46,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:46,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-26 22:38:46,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 22:38:46,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:46,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:46,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:46,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:46,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:46,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:46,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:38:46,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:46,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:46,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:46,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:46,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:46,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:38:46,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:46,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 22:38:46,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:46,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:46,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:38:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:46,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:46,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:46,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:38:46,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:46,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 22:38:46,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:46,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-26 22:38:46,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:46,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-10-26 22:38:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:46,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:46,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:46,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 22:38:46,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:46,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-26 22:38:46,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:46,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:46,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:46,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 22:38:46,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 235 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-26 22:38:47,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681869383] [2020-10-26 22:38:47,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:47,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:38:47,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986924442] [2020-10-26 22:38:47,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:38:47,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:47,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:38:47,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:38:47,075 INFO L87 Difference]: Start difference. First operand 18365 states and 21332 transitions. Second operand 7 states. [2020-10-26 22:38:50,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:50,837 INFO L93 Difference]: Finished difference Result 33849 states and 39546 transitions. [2020-10-26 22:38:50,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:38:50,838 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 357 [2020-10-26 22:38:50,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:38:50,870 INFO L225 Difference]: With dead ends: 33849 [2020-10-26 22:38:50,871 INFO L226 Difference]: Without dead ends: 18974 [2020-10-26 22:38:50,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:38:50,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18974 states. [2020-10-26 22:38:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18974 to 18933. [2020-10-26 22:38:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18933 states. [2020-10-26 22:38:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18933 states to 18933 states and 21960 transitions. [2020-10-26 22:38:51,206 INFO L78 Accepts]: Start accepts. Automaton has 18933 states and 21960 transitions. Word has length 357 [2020-10-26 22:38:51,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:38:51,207 INFO L481 AbstractCegarLoop]: Abstraction has 18933 states and 21960 transitions. [2020-10-26 22:38:51,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:38:51,207 INFO L276 IsEmpty]: Start isEmpty. Operand 18933 states and 21960 transitions. [2020-10-26 22:38:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-10-26 22:38:51,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:38:51,218 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:38:51,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 22:38:51,219 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:38:51,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:38:51,219 INFO L82 PathProgramCache]: Analyzing trace with hash -226160277, now seen corresponding path program 1 times [2020-10-26 22:38:51,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:38:51,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308277027] [2020-10-26 22:38:51,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:38:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:51,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:51,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:53,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:53,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 378 [2020-10-26 22:38:53,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:38:53,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1722 [2020-10-26 22:38:53,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:53,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:53,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 224 [2020-10-26 22:38:53,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-26 22:38:53,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:53,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:38:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:53,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:53,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:53,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:38:53,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:53,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:38:53,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:53,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:53,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:53,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:53,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:53,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:38:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:53,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:53,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:53,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:38:53,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:53,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 22:38:53,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:53,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:38:53,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:53,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:38:53,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:53,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:38:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:53,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:53,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:53,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 22:38:53,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:53,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 22:38:53,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:53,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:38:53,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:38:53,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 22:38:53,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:53,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-10-26 22:38:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:38:53,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:38:53,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:38:53,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 22:38:53,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:38:53,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-26 22:38:53,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:38:53,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:38:53,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:38:53,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:38:53,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:38:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 291 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-26 22:38:54,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308277027] [2020-10-26 22:38:54,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:38:54,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:38:54,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155291326] [2020-10-26 22:38:54,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:38:54,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:38:54,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:38:54,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:38:54,172 INFO L87 Difference]: Start difference. First operand 18933 states and 21960 transitions. Second operand 8 states. [2020-10-26 22:38:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:38:59,968 INFO L93 Difference]: Finished difference Result 35197 states and 41138 transitions. [2020-10-26 22:38:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:38:59,970 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 362 [2020-10-26 22:38:59,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:00,018 INFO L225 Difference]: With dead ends: 35197 [2020-10-26 22:39:00,018 INFO L226 Difference]: Without dead ends: 19942 [2020-10-26 22:39:00,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:39:00,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19942 states. [2020-10-26 22:39:00,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19942 to 19889. [2020-10-26 22:39:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19889 states. [2020-10-26 22:39:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19889 states to 19889 states and 23065 transitions. [2020-10-26 22:39:00,406 INFO L78 Accepts]: Start accepts. Automaton has 19889 states and 23065 transitions. Word has length 362 [2020-10-26 22:39:00,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:00,407 INFO L481 AbstractCegarLoop]: Abstraction has 19889 states and 23065 transitions. [2020-10-26 22:39:00,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:39:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 19889 states and 23065 transitions. [2020-10-26 22:39:00,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-10-26 22:39:00,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:00,418 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:39:00,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 22:39:00,418 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:00,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:00,419 INFO L82 PathProgramCache]: Analyzing trace with hash -683219621, now seen corresponding path program 1 times [2020-10-26 22:39:00,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:00,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683239374] [2020-10-26 22:39:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:00,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:00,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:00,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:03,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:05,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:05,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 386 [2020-10-26 22:39:05,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:39:05,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-26 22:39:05,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:05,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 22:39:05,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:39:05,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 296 [2020-10-26 22:39:05,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:05,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:05,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:05,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:05,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:05,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:05,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 22:39:05,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:05,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:05,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:05,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:39:05,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-26 22:39:05,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:05,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:06,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:06,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 22:39:06,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:06,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-26 22:39:06,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:06,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:06,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:06,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-26 22:39:06,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:06,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-10-26 22:39:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:06,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:06,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:06,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 22:39:06,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:06,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-26 22:39:06,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:06,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 22:39:06,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:06,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 22:39:06,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:06,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-10-26 22:39:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:06,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:06,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:07,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:07,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 22:39:07,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:07,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-26 22:39:07,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:07,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 22:39:07,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:07,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:39:07,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:07,278 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-26 22:39:07,424 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-26 22:39:07,573 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-10-26 22:39:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 100 proven. 201 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-26 22:39:08,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683239374] [2020-10-26 22:39:08,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:08,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 22:39:08,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560254739] [2020-10-26 22:39:08,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 22:39:08,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:08,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 22:39:08,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-26 22:39:08,219 INFO L87 Difference]: Start difference. First operand 19889 states and 23065 transitions. Second operand 13 states. [2020-10-26 22:39:08,482 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 70 [2020-10-26 22:39:09,672 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-10-26 22:39:10,058 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2020-10-26 22:39:10,448 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2020-10-26 22:39:11,303 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2020-10-26 22:39:11,902 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-26 22:39:12,200 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-10-26 22:39:12,523 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 80 [2020-10-26 22:39:12,968 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-26 22:39:13,418 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-26 22:39:14,487 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2020-10-26 22:39:15,263 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-26 22:39:16,983 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-26 22:39:17,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:17,769 INFO L93 Difference]: Finished difference Result 36366 states and 42318 transitions. [2020-10-26 22:39:17,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 22:39:17,773 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 370 [2020-10-26 22:39:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:17,806 INFO L225 Difference]: With dead ends: 36366 [2020-10-26 22:39:17,806 INFO L226 Difference]: Without dead ends: 19957 [2020-10-26 22:39:17,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=273, Invalid=917, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 22:39:17,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19957 states. [2020-10-26 22:39:18,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19957 to 19885. [2020-10-26 22:39:18,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19885 states. [2020-10-26 22:39:18,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19885 states to 19885 states and 23051 transitions. [2020-10-26 22:39:18,202 INFO L78 Accepts]: Start accepts. Automaton has 19885 states and 23051 transitions. Word has length 370 [2020-10-26 22:39:18,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:18,203 INFO L481 AbstractCegarLoop]: Abstraction has 19885 states and 23051 transitions. [2020-10-26 22:39:18,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 22:39:18,203 INFO L276 IsEmpty]: Start isEmpty. Operand 19885 states and 23051 transitions. [2020-10-26 22:39:18,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2020-10-26 22:39:18,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:18,214 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:39:18,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 22:39:18,214 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:18,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:18,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1769682734, now seen corresponding path program 1 times [2020-10-26 22:39:18,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:18,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872344973] [2020-10-26 22:39:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:18,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:18,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:18,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:20,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:20,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 388 [2020-10-26 22:39:20,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:39:20,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2221 [2020-10-26 22:39:20,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:20,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:20,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 234 [2020-10-26 22:39:20,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 22:39:20,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:20,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:20,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:20,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:20,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:20,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:20,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:39:20,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:20,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:20,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:20,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:20,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:20,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:20,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:20,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:20,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 22:39:20,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:20,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 22:39:20,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:20,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:20,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:20,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:20,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:20,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-26 22:39:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:20,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:20,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:20,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 22:39:20,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:20,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-26 22:39:20,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:20,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:20,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 22:39:20,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:20,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-10-26 22:39:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:20,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:21,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:21,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:21,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 22:39:21,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:21,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 22:39:21,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:21,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:21,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:21,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:39:21,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 296 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-26 22:39:21,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872344973] [2020-10-26 22:39:21,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:21,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:39:21,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209288842] [2020-10-26 22:39:21,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:39:21,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:21,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:39:21,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:39:21,406 INFO L87 Difference]: Start difference. First operand 19885 states and 23051 transitions. Second operand 7 states. [2020-10-26 22:39:23,019 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-26 22:39:24,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:24,909 INFO L93 Difference]: Finished difference Result 36246 states and 42422 transitions. [2020-10-26 22:39:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:39:24,910 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 372 [2020-10-26 22:39:24,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:24,944 INFO L225 Difference]: With dead ends: 36246 [2020-10-26 22:39:24,945 INFO L226 Difference]: Without dead ends: 19995 [2020-10-26 22:39:24,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:39:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19995 states. [2020-10-26 22:39:25,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19995 to 19879. [2020-10-26 22:39:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19879 states. [2020-10-26 22:39:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19879 states to 19879 states and 23002 transitions. [2020-10-26 22:39:25,278 INFO L78 Accepts]: Start accepts. Automaton has 19879 states and 23002 transitions. Word has length 372 [2020-10-26 22:39:25,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:25,279 INFO L481 AbstractCegarLoop]: Abstraction has 19879 states and 23002 transitions. [2020-10-26 22:39:25,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:39:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 19879 states and 23002 transitions. [2020-10-26 22:39:25,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-10-26 22:39:25,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:25,298 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:39:25,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 22:39:25,299 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:25,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:25,300 INFO L82 PathProgramCache]: Analyzing trace with hash -186728443, now seen corresponding path program 1 times [2020-10-26 22:39:25,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:25,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405411869] [2020-10-26 22:39:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:25,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:25,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:26,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:26,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:26,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 409 [2020-10-26 22:39:26,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:39:26,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1599 [2020-10-26 22:39:26,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:26,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:26,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 255 [2020-10-26 22:39:26,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 22:39:26,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:27,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:27,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:27,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:27,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:27,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:27,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 22:39:27,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:27,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:27,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:27,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:27,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:27,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:27,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:27,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:27,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 22:39:27,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:27,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-26 22:39:27,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:27,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:27,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:27,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:27,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:27,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 22:39:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:27,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:27,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:27,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 22:39:27,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:27,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 22:39:27,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:27,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:27,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:27,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 22:39:27,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:27,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-10-26 22:39:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:27,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:27,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:27,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:27,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 22:39:27,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:39:27,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-26 22:39:27,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:27,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:27,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:27,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:39:27,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 277 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-26 22:39:27,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405411869] [2020-10-26 22:39:27,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:27,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:39:27,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466570534] [2020-10-26 22:39:27,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:39:27,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:27,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:39:27,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:39:27,932 INFO L87 Difference]: Start difference. First operand 19879 states and 23002 transitions. Second operand 7 states. [2020-10-26 22:39:30,346 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-26 22:39:32,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:39:32,450 INFO L93 Difference]: Finished difference Result 35963 states and 41780 transitions. [2020-10-26 22:39:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 22:39:32,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 393 [2020-10-26 22:39:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:39:32,491 INFO L225 Difference]: With dead ends: 35963 [2020-10-26 22:39:32,491 INFO L226 Difference]: Without dead ends: 19925 [2020-10-26 22:39:32,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:39:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19925 states. [2020-10-26 22:39:32,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19925 to 19877. [2020-10-26 22:39:32,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19877 states. [2020-10-26 22:39:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19877 states to 19877 states and 22977 transitions. [2020-10-26 22:39:32,888 INFO L78 Accepts]: Start accepts. Automaton has 19877 states and 22977 transitions. Word has length 393 [2020-10-26 22:39:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:39:32,889 INFO L481 AbstractCegarLoop]: Abstraction has 19877 states and 22977 transitions. [2020-10-26 22:39:32,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:39:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 19877 states and 22977 transitions. [2020-10-26 22:39:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-10-26 22:39:32,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:39:32,897 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:39:32,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 22:39:32,897 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:39:32,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:39:32,898 INFO L82 PathProgramCache]: Analyzing trace with hash -387197319, now seen corresponding path program 1 times [2020-10-26 22:39:32,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:39:32,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816481923] [2020-10-26 22:39:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:39:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:33,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:33,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:33,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:34,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:34,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 412 [2020-10-26 22:39:34,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:39:34,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1944 [2020-10-26 22:39:34,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:34,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:34,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 258 [2020-10-26 22:39:34,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-26 22:39:34,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:35,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:39:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:35,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:35,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:35,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:39:35,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:35,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:39:35,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:35,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:35,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:35,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:39:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:35,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:35,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:35,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 22:39:35,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:35,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 22:39:35,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:39:35,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:35,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:39:35,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:35,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-10-26 22:39:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:35,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:35,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:35,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 22:39:35,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:35,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-26 22:39:35,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:39:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:39:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:39:35,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:35,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-10-26 22:39:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:39:35,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:39:35,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:39:35,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 22:39:35,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:39:35,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 22:39:35,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:39:35,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:39:35,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:39:35,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 22:39:35,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:39:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 315 proven. 2 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-26 22:39:35,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816481923] [2020-10-26 22:39:35,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:39:35,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:39:35,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201974013] [2020-10-26 22:39:35,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:39:35,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:39:35,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:39:35,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:39:35,611 INFO L87 Difference]: Start difference. First operand 19877 states and 22977 transitions. Second operand 7 states.