/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=DEEPEST --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/reducercommutativity/max20-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 22:41:38,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 22:41:38,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 22:41:38,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 22:41:38,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 22:41:38,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 22:41:38,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 22:41:38,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 22:41:38,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 22:41:38,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 22:41:38,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 22:41:38,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 22:41:38,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 22:41:38,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 22:41:38,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 22:41:38,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 22:41:38,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 22:41:38,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 22:41:38,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 22:41:38,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 22:41:38,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 22:41:38,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 22:41:38,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 22:41:38,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 22:41:38,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 22:41:38,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 22:41:38,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 22:41:38,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 22:41:38,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 22:41:38,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 22:41:38,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 22:41:38,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 22:41:38,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 22:41:38,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 22:41:38,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 22:41:38,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 22:41:38,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 22:41:38,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 22:41:38,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 22:41:38,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 22:41:38,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 22:41:38,367 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 [2020-10-27 22:41:38,420 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 22:41:38,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 22:41:38,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 22:41:38,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 22:41:38,425 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 22:41:38,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 22:41:38,425 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 22:41:38,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 22:41:38,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 22:41:38,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 22:41:38,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 22:41:38,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 22:41:38,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 22:41:38,429 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 22:41:38,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 22:41:38,430 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 22:41:38,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 22:41:38,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 22:41:38,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 22:41:38,431 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 22:41:38,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 22:41:38,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 22:41:38,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 22:41:38,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 22:41:38,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 22:41:38,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 22:41:38,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 22:41:38,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 22:41:38,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 22:41:38,433 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 22:41:38,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 22:41:38,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 22:41:38,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 22:41:38,863 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 22:41:38,863 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 22:41:38,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max20-1.i [2020-10-27 22:41:38,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae8578438/519e77709a324cb79666af1d9fe34c33/FLAGc3954f7b1 [2020-10-27 22:41:39,673 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 22:41:39,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/reducercommutativity/max20-1.i [2020-10-27 22:41:39,684 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae8578438/519e77709a324cb79666af1d9fe34c33/FLAGc3954f7b1 [2020-10-27 22:41:39,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae8578438/519e77709a324cb79666af1d9fe34c33 [2020-10-27 22:41:40,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 22:41:40,013 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 22:41:40,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 22:41:40,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 22:41:40,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 22:41:40,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:41:40" (1/1) ... [2020-10-27 22:41:40,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4f0674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:41:40, skipping insertion in model container [2020-10-27 22:41:40,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:41:40" (1/1) ... [2020-10-27 22:41:40,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 22:41:40,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 22:41:40,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 22:41:40,246 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 22:41:40,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 22:41:40,290 INFO L208 MainTranslator]: Completed translation [2020-10-27 22:41:40,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:41:40 WrapperNode [2020-10-27 22:41:40,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 22:41:40,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 22:41:40,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 22:41:40,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 22:41:40,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:41:40" (1/1) ... [2020-10-27 22:41:40,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:41:40" (1/1) ... [2020-10-27 22:41:40,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:41:40" (1/1) ... [2020-10-27 22:41:40,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:41:40" (1/1) ... [2020-10-27 22:41:40,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:41:40" (1/1) ... [2020-10-27 22:41:40,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:41:40" (1/1) ... [2020-10-27 22:41:40,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:41:40" (1/1) ... [2020-10-27 22:41:40,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 22:41:40,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 22:41:40,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 22:41:40,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 22:41:40,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:41:40" (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 [2020-10-27 22:41:40,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 22:41:40,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 22:41:40,432 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 22:41:40,432 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-10-27 22:41:40,432 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 22:41:40,433 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 22:41:40,433 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 22:41:40,433 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 22:41:40,433 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 22:41:40,433 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 22:41:40,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 22:41:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 22:41:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-10-27 22:41:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 22:41:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 22:41:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 22:41:40,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 22:41:40,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 22:41:40,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 22:41:40,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 22:41:40,942 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 22:41:40,942 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 22:41:40,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:41:40 BoogieIcfgContainer [2020-10-27 22:41:40,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 22:41:40,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 22:41:40,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 22:41:40,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 22:41:40,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 10:41:40" (1/3) ... [2020-10-27 22:41:40,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2690cacf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:41:40, skipping insertion in model container [2020-10-27 22:41:40,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:41:40" (2/3) ... [2020-10-27 22:41:40,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2690cacf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:41:40, skipping insertion in model container [2020-10-27 22:41:40,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:41:40" (3/3) ... [2020-10-27 22:41:40,960 INFO L111 eAbstractionObserver]: Analyzing ICFG max20-1.i [2020-10-27 22:41:40,973 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 22:41:40,980 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 22:41:40,994 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 22:41:41,039 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 22:41:41,039 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 22:41:41,039 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 22:41:41,039 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 22:41:41,039 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 22:41:41,040 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 22:41:41,040 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 22:41:41,040 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 22:41:41,066 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 22:41:41,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 22:41:41,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:41:41,085 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:41:41,086 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:41:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:41:41,095 INFO L82 PathProgramCache]: Analyzing trace with hash -122162658, now seen corresponding path program 1 times [2020-10-27 22:41:41,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:41:41,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048601633] [2020-10-27 22:41:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:41:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:41,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:41,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:41,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:41,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:41,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:41,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:43,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:43,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 22:41:43,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 22:41:43,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1758 [2020-10-27 22:41:43,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:43,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:41:43,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 22:41:43,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:41:43,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 22:41:43,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:41:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:43,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:43,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:43,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:41:43,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:41:43,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:41:43,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:43,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:41:43,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:41:43,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:41:43,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:41:43,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:41:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:43,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:43,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:43,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:43,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:41:43,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:41:43,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:41:43,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:41:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 22:41:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:41:43,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:41:43,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 22:41:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:43,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:43,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:43,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:43,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:41:43,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:41:43,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 22:41:43,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:43,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:41:43,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 22:41:43,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:41:43,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:41:43,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 22:41:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:43,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:43,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:43,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:41:43,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:41:43,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:41:43,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:43,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:41:43,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 22:41:43,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:41:43,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:41:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 22:41:43,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048601633] [2020-10-27 22:41:43,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:41:43,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 22:41:43,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653018059] [2020-10-27 22:41:43,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 22:41:43,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:41:43,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 22:41:43,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 22:41:43,290 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-27 22:41:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:41:43,433 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2020-10-27 22:41:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 22:41:43,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-27 22:41:43,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:41:43,444 INFO L225 Difference]: With dead ends: 64 [2020-10-27 22:41:43,445 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 22:41:43,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 22:41:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 22:41:43,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 22:41:43,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 22:41:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-27 22:41:43,497 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 34 [2020-10-27 22:41:43,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:41:43,497 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-27 22:41:43,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 22:41:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-27 22:41:43,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 22:41:43,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:41:43,500 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:41:43,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 22:41:43,501 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:41:43,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:41:43,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1084102031, now seen corresponding path program 1 times [2020-10-27 22:41:43,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:41:43,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73081095] [2020-10-27 22:41:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:41:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:43,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:43,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:43,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:43,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:43,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:43,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:45,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:45,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 22:41:45,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 22:41:45,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1543 [2020-10-27 22:41:45,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:45,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:41:45,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 22:41:45,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 22:41:45,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:41:45,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:41:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:45,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:45,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:45,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:41:45,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:41:45,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:41:45,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:45,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:41:45,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:41:45,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:41:45,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:41:45,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:41:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:45,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:45,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:45,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:45,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:41:45,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:41:45,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 22:41:45,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:45,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:41:45,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:41:45,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 22:41:45,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:41:45,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-27 22:41:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:45,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:45,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:45,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:45,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:41:45,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:41:45,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 22:41:45,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:45,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:41:45,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:41:45,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 22:41:45,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:41:45,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 22:41:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:45,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:45,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:45,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 22:41:45,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:41:45,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 22:41:45,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:45,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:41:45,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:41:45,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 22:41:45,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:41:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 22:41:45,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73081095] [2020-10-27 22:41:45,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 22:41:45,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 22:41:45,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143270055] [2020-10-27 22:41:45,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 22:41:45,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:41:45,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 22:41:45,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 22:41:45,184 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 4 states. [2020-10-27 22:41:45,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:41:45,368 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2020-10-27 22:41:45,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 22:41:45,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-27 22:41:45,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:41:45,371 INFO L225 Difference]: With dead ends: 55 [2020-10-27 22:41:45,371 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 22:41:45,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:41:45,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 22:41:45,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-27 22:41:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 22:41:45,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-27 22:41:45,382 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 34 [2020-10-27 22:41:45,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:41:45,383 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-27 22:41:45,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 22:41:45,383 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-27 22:41:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 22:41:45,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:41:45,385 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:41:45,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 22:41:45,385 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:41:45,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:41:45,386 INFO L82 PathProgramCache]: Analyzing trace with hash 548239116, now seen corresponding path program 1 times [2020-10-27 22:41:45,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:41:45,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177565264] [2020-10-27 22:41:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:41:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:45,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:45,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:45,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:45,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:45,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:48,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:48,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 22:41:48,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:41:48,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3262 [2020-10-27 22:41:48,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:48,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:41:48,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 22:41:48,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 22:41:48,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 22:41:48,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:41:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:48,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:48,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:48,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:41:48,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:41:48,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 22:41:48,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:48,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:41:48,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:41:48,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:41:48,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:41:48,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:41:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:48,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:48,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:48,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:48,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 22:41:48,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:41:48,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 22:41:48,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:48,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:41:48,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:41:48,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 22:41:48,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:41:48,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-27 22:41:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:48,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:48,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:48,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:48,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 22:41:48,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:41:48,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 22:41:48,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:41:48,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:41:48,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 22:41:48,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:41:48,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 22:41:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:48,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:48,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:48,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 22:41:48,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:41:48,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 22:41:48,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:48,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:41:48,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:41:48,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 22:41:48,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 22:41:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 22:41:48,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177565264] [2020-10-27 22:41:48,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:41:48,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 22:41:48,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054516925] [2020-10-27 22:41:48,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 22:41:48,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:41:48,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 22:41:48,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 22:41:48,916 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2020-10-27 22:41:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:41:49,258 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-10-27 22:41:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 22:41:49,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-27 22:41:49,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:41:49,261 INFO L225 Difference]: With dead ends: 60 [2020-10-27 22:41:49,262 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 22:41:49,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 22:41:49,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 22:41:49,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-27 22:41:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 22:41:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-27 22:41:49,281 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 46 [2020-10-27 22:41:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:41:49,282 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-27 22:41:49,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 22:41:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-27 22:41:49,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 22:41:49,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:41:49,285 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:41:49,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 22:41:49,286 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:41:49,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:41:49,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2055205671, now seen corresponding path program 2 times [2020-10-27 22:41:49,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:41:49,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859777690] [2020-10-27 22:41:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:41:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:49,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:49,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:49,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:49,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:49,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:50,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:54,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:54,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 22:41:54,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 22:41:54,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 22:41:54,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:54,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 22:41:54,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 22:41:54,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 22:41:54,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:41:54,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:41:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:54,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:54,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:54,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:41:54,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:41:54,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 22:41:54,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:54,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:41:54,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:41:54,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:41:54,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 22:41:54,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:41:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:54,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:54,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:54,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:54,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 22:41:54,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:41:54,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 22:41:54,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:54,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:41:54,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:41:54,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 22:41:54,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:41:54,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-27 22:41:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:54,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:54,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:54,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:54,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 22:41:54,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:41:54,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 22:41:54,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:54,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:41:54,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:41:54,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 22:41:54,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:41:54,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-27 22:41:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:54,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:54,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:54,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:41:54,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 22:41:54,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:41:54,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 22:41:54,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:41:54,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:41:54,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 22:41:54,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:41:54,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:41:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 22:41:54,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859777690] [2020-10-27 22:41:54,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:41:54,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 22:41:54,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619411795] [2020-10-27 22:41:54,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 22:41:54,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:41:54,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 22:41:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 22:41:54,623 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 7 states. [2020-10-27 22:41:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:41:55,014 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2020-10-27 22:41:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 22:41:55,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-27 22:41:55,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:41:55,016 INFO L225 Difference]: With dead ends: 70 [2020-10-27 22:41:55,016 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 22:41:55,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 22:41:55,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 22:41:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-27 22:41:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 22:41:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-27 22:41:55,026 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 58 [2020-10-27 22:41:55,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:41:55,026 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-27 22:41:55,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 22:41:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-27 22:41:55,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 22:41:55,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:41:55,028 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:41:55,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 22:41:55,028 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:41:55,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:41:55,029 INFO L82 PathProgramCache]: Analyzing trace with hash 167781920, now seen corresponding path program 1 times [2020-10-27 22:41:55,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:41:55,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071675441] [2020-10-27 22:41:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:41:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:41:55,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:55,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:55,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:55,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:55,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:57,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:41:58,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:00,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:00,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 22:42:00,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 22:42:00,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 22:42:00,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:00,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 22:42:00,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-27 22:42:00,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 22:42:00,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:00,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:42:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:00,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:00,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:00,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:42:00,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:42:00,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:42:00,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:00,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:00,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:42:00,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:00,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:00,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:42:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:00,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:00,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:00,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:00,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 22:42:00,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:00,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-27 22:42:00,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:00,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:42:00,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:00,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 22:42:00,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:00,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 22:42:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:00,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:00,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:00,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:00,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 22:42:00,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:00,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 22:42:00,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:00,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:42:00,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:00,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 22:42:00,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:00,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-27 22:42:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:00,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:00,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:00,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:00,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 22:42:00,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:00,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-27 22:42:00,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:00,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:42:00,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:00,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 22:42:00,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-27 22:42:00,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071675441] [2020-10-27 22:42:00,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:42:00,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 22:42:00,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147427976] [2020-10-27 22:42:00,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 22:42:00,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:42:00,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 22:42:00,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 22:42:00,661 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 9 states. [2020-10-27 22:42:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:42:01,196 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2020-10-27 22:42:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 22:42:01,200 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-27 22:42:01,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:42:01,203 INFO L225 Difference]: With dead ends: 85 [2020-10-27 22:42:01,204 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 22:42:01,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-27 22:42:01,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 22:42:01,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2020-10-27 22:42:01,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 22:42:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-27 22:42:01,227 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 72 [2020-10-27 22:42:01,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:42:01,230 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-27 22:42:01,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 22:42:01,230 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-27 22:42:01,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 22:42:01,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:42:01,232 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:42:01,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 22:42:01,235 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:42:01,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:42:01,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1620937275, now seen corresponding path program 2 times [2020-10-27 22:42:01,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:42:01,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774534306] [2020-10-27 22:42:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:42:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:01,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:01,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:01,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:01,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:01,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:06,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:06,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 22:42:06,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:42:06,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 22:42:06,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:06,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 22:42:06,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-27 22:42:06,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 22:42:06,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:06,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:42:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:06,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:06,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:06,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:42:06,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:42:06,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:42:06,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:06,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:06,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:42:06,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:06,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:06,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:42:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:06,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:06,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:06,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:06,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 22:42:06,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:06,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-27 22:42:06,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:06,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:42:06,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:06,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 22:42:06,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:42:06,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-27 22:42:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:06,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:06,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:06,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:06,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 22:42:06,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:06,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-27 22:42:06,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:06,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:42:06,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:06,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 22:42:06,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:06,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-27 22:42:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:06,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:06,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:06,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:06,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 22:42:06,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:06,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-27 22:42:06,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 22:42:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:06,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 28 proven. 237 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-27 22:42:06,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774534306] [2020-10-27 22:42:06,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:42:06,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 22:42:06,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988367115] [2020-10-27 22:42:06,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 22:42:06,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:42:06,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 22:42:06,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-27 22:42:06,722 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 10 states. [2020-10-27 22:42:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:42:07,317 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2020-10-27 22:42:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 22:42:07,319 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-10-27 22:42:07,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:42:07,320 INFO L225 Difference]: With dead ends: 89 [2020-10-27 22:42:07,320 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 22:42:07,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-27 22:42:07,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 22:42:07,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-27 22:42:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 22:42:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-10-27 22:42:07,340 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 84 [2020-10-27 22:42:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:42:07,341 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-10-27 22:42:07,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 22:42:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-10-27 22:42:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 22:42:07,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:42:07,349 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:42:07,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 22:42:07,351 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:42:07,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:42:07,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1852266420, now seen corresponding path program 3 times [2020-10-27 22:42:07,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:42:07,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382538027] [2020-10-27 22:42:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:42:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:07,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:07,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:07,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:07,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:07,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:12,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:12,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 22:42:12,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:42:12,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 22:42:12,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:12,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 22:42:12,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-27 22:42:12,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 22:42:12,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:12,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:42:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:12,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:12,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:12,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:42:12,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:42:12,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:42:12,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:12,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:12,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:42:12,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:12,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:42:12,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:42:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:12,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:12,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:12,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:12,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 22:42:12,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:12,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 22:42:12,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:12,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 22:42:12,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:12,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 22:42:12,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 22:42:12,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 22:42:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:12,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:12,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:12,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:12,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 22:42:12,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:12,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 22:42:12,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:12,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 22:42:12,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:12,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 22:42:12,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:12,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 22:42:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:12,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:12,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:13,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:13,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 22:42:13,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:13,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-27 22:42:13,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 22:42:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:13,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 45 proven. 367 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 22:42:13,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382538027] [2020-10-27 22:42:13,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:42:13,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 22:42:13,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743905273] [2020-10-27 22:42:13,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 22:42:13,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:42:13,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 22:42:13,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-27 22:42:13,039 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 12 states. [2020-10-27 22:42:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:42:13,740 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2020-10-27 22:42:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 22:42:13,741 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 98 [2020-10-27 22:42:13,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:42:13,743 INFO L225 Difference]: With dead ends: 101 [2020-10-27 22:42:13,743 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 22:42:13,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-10-27 22:42:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 22:42:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-27 22:42:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 22:42:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-27 22:42:13,752 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 98 [2020-10-27 22:42:13,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:42:13,753 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-27 22:42:13,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 22:42:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-27 22:42:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 22:42:13,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:42:13,755 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:42:13,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 22:42:13,755 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:42:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:42:13,756 INFO L82 PathProgramCache]: Analyzing trace with hash 314844973, now seen corresponding path program 4 times [2020-10-27 22:42:13,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:42:13,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664644511] [2020-10-27 22:42:13,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:42:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:13,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:13,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:13,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:13,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:13,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:18,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:18,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 22:42:18,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:42:18,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 22:42:18,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:18,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 22:42:18,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-27 22:42:18,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 22:42:18,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:18,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:42:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:18,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:18,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:18,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:42:18,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:42:18,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:42:18,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:18,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:18,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:42:18,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:18,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:18,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:42:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:18,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:18,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:19,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:19,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 22:42:19,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:19,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-27 22:42:19,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:19,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 22:42:19,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:19,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 22:42:19,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:19,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-27 22:42:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:19,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:19,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:19,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:19,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 22:42:19,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:19,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-27 22:42:19,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 22:42:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 22:42:19,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:19,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-27 22:42:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:19,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:19,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:19,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:19,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 22:42:19,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:19,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-27 22:42:19,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:19,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:19,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 22:42:19,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:19,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 66 proven. 527 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-10-27 22:42:19,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664644511] [2020-10-27 22:42:19,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:42:19,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 22:42:19,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140591741] [2020-10-27 22:42:19,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 22:42:19,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:42:19,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 22:42:19,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-27 22:42:19,448 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 14 states. [2020-10-27 22:42:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:42:20,359 INFO L93 Difference]: Finished difference Result 113 states and 138 transitions. [2020-10-27 22:42:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 22:42:20,360 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 112 [2020-10-27 22:42:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:42:20,361 INFO L225 Difference]: With dead ends: 113 [2020-10-27 22:42:20,361 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 22:42:20,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-10-27 22:42:20,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 22:42:20,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-10-27 22:42:20,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 22:42:20,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2020-10-27 22:42:20,374 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 112 [2020-10-27 22:42:20,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:42:20,375 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2020-10-27 22:42:20,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 22:42:20,375 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2020-10-27 22:42:20,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 22:42:20,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:42:20,377 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:42:20,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 22:42:20,377 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:42:20,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:42:20,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1903585114, now seen corresponding path program 5 times [2020-10-27 22:42:20,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:42:20,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947318034] [2020-10-27 22:42:20,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:42:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:20,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:20,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:20,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:20,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:20,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:25,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:25,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-27 22:42:25,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:42:25,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 22:42:25,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:25,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 22:42:25,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 22:42:25,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 22:42:25,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:25,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:42:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:25,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:25,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:25,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:42:25,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:42:25,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:42:25,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:25,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:25,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:42:25,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:25,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:25,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:42:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:25,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:25,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:25,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:25,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 22:42:25,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:25,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-27 22:42:25,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:25,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 22:42:25,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:25,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 22:42:25,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:25,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-27 22:42:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:25,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:25,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:25,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:25,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 22:42:25,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:25,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 22:42:25,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:25,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 22:42:25,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:25,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 22:42:25,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:25,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-27 22:42:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:25,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:25,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:26,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:26,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 22:42:26,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:26,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-27 22:42:26,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:26,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:26,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 22:42:26,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:26,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 91 proven. 717 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-27 22:42:26,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947318034] [2020-10-27 22:42:26,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:42:26,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 22:42:26,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229903142] [2020-10-27 22:42:26,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 22:42:26,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:42:26,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 22:42:26,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-27 22:42:26,086 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand 16 states. [2020-10-27 22:42:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:42:27,091 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2020-10-27 22:42:27,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 22:42:27,092 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 126 [2020-10-27 22:42:27,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:42:27,093 INFO L225 Difference]: With dead ends: 125 [2020-10-27 22:42:27,093 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 22:42:27,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-10-27 22:42:27,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 22:42:27,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2020-10-27 22:42:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 22:42:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2020-10-27 22:42:27,104 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 126 [2020-10-27 22:42:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:42:27,105 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2020-10-27 22:42:27,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 22:42:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2020-10-27 22:42:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 22:42:27,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:42:27,107 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:42:27,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 22:42:27,108 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:42:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:42:27,108 INFO L82 PathProgramCache]: Analyzing trace with hash 475352095, now seen corresponding path program 6 times [2020-10-27 22:42:27,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:42:27,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26583360] [2020-10-27 22:42:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:42:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:27,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:27,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:27,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:27,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:27,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:32,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:32,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 22:42:32,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:42:32,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 22:42:32,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:32,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 22:42:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-10-27 22:42:32,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 22:42:32,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:32,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:42:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:32,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:32,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:32,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:42:32,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:42:32,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:42:32,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:32,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:32,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:42:32,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:32,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:32,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:42:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:32,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:32,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:32,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:32,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 22:42:32,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:32,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 22:42:32,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:32,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 22:42:32,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:32,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 22:42:32,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:32,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 22:42:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:32,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:32,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:32,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:32,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 22:42:32,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:32,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 22:42:32,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:32,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 22:42:32,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:32,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 22:42:32,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:32,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-27 22:42:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:32,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:32,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:32,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:32,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 22:42:32,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:32,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 22:42:32,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:32,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:32,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 22:42:32,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:32,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 120 proven. 937 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-27 22:42:32,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26583360] [2020-10-27 22:42:32,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:42:32,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 22:42:32,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170028179] [2020-10-27 22:42:32,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 22:42:32,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:42:32,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 22:42:32,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-27 22:42:32,980 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand 18 states. [2020-10-27 22:42:34,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:42:34,198 INFO L93 Difference]: Finished difference Result 137 states and 166 transitions. [2020-10-27 22:42:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 22:42:34,199 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 140 [2020-10-27 22:42:34,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:42:34,201 INFO L225 Difference]: With dead ends: 137 [2020-10-27 22:42:34,201 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 22:42:34,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-27 22:42:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 22:42:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-10-27 22:42:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 22:42:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-10-27 22:42:34,219 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 140 [2020-10-27 22:42:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:42:34,226 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-10-27 22:42:34,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 22:42:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-10-27 22:42:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 22:42:34,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:42:34,230 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:42:34,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 22:42:34,230 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:42:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:42:34,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2104696424, now seen corresponding path program 7 times [2020-10-27 22:42:34,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:42:34,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311781673] [2020-10-27 22:42:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:42:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:34,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:34,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:34,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:34,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:34,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:39,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:39,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-27 22:42:39,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:42:39,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 22:42:39,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 22:42:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 102 [2020-10-27 22:42:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 22:42:39,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:39,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:42:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:39,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:39,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:39,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:42:39,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:42:39,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 22:42:39,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:39,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:39,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:42:39,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:39,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:39,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:42:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:39,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:39,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:39,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:39,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 22:42:39,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:39,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-27 22:42:39,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:39,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 22:42:39,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:39,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 22:42:39,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:40,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-27 22:42:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:40,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:40,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:40,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:40,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 22:42:40,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:40,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-27 22:42:40,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:40,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 22:42:40,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:40,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 22:42:40,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:40,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-27 22:42:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:40,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:40,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:40,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:40,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 22:42:40,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:40,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-27 22:42:40,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:40,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:40,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 22:42:40,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:40,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 153 proven. 1187 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-27 22:42:40,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311781673] [2020-10-27 22:42:40,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:42:40,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 22:42:40,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978333482] [2020-10-27 22:42:40,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 22:42:40,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:42:40,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 22:42:40,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-10-27 22:42:40,419 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 20 states. [2020-10-27 22:42:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:42:41,551 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2020-10-27 22:42:41,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 22:42:41,552 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 154 [2020-10-27 22:42:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:42:41,553 INFO L225 Difference]: With dead ends: 149 [2020-10-27 22:42:41,554 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 22:42:41,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2020-10-27 22:42:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 22:42:41,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2020-10-27 22:42:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 22:42:41,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2020-10-27 22:42:41,564 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 154 [2020-10-27 22:42:41,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:42:41,565 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2020-10-27 22:42:41,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 22:42:41,565 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2020-10-27 22:42:41,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 22:42:41,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:42:41,568 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:42:41,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 22:42:41,568 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:42:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:42:41,569 INFO L82 PathProgramCache]: Analyzing trace with hash 626915601, now seen corresponding path program 8 times [2020-10-27 22:42:41,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:42:41,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546290572] [2020-10-27 22:42:41,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:42:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:41,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:41,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:41,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:41,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:45,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:46,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:46,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-27 22:42:46,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:42:46,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 22:42:46,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:46,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 22:42:46,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-27 22:42:46,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 22:42:46,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:46,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:42:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:46,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:46,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:46,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:42:46,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:42:46,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:42:46,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:46,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:46,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:42:46,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:46,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:46,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:42:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:46,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:46,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:47,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:47,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 22:42:47,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:47,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-27 22:42:47,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:47,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 22:42:47,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:47,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 22:42:47,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:47,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-27 22:42:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:47,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:47,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:47,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:47,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 22:42:47,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:47,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 22:42:47,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:47,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 22:42:47,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:47,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 22:42:47,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:47,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-27 22:42:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:47,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:47,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:47,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:47,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 22:42:47,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:47,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-27 22:42:47,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:47,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:47,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 22:42:47,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:47,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1894 backedges. 190 proven. 1467 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2020-10-27 22:42:47,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546290572] [2020-10-27 22:42:47,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:42:47,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 22:42:47,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477519726] [2020-10-27 22:42:47,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 22:42:47,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:42:47,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 22:42:47,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2020-10-27 22:42:47,683 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand 22 states. [2020-10-27 22:42:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:42:48,999 INFO L93 Difference]: Finished difference Result 161 states and 194 transitions. [2020-10-27 22:42:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 22:42:49,000 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 168 [2020-10-27 22:42:49,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:42:49,001 INFO L225 Difference]: With dead ends: 161 [2020-10-27 22:42:49,002 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 22:42:49,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 22:42:49,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 22:42:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-10-27 22:42:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 22:42:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2020-10-27 22:42:49,023 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 168 [2020-10-27 22:42:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:42:49,024 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2020-10-27 22:42:49,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 22:42:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2020-10-27 22:42:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-27 22:42:49,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:42:49,026 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:42:49,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 22:42:49,027 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:42:49,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:42:49,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1732365686, now seen corresponding path program 9 times [2020-10-27 22:42:49,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:42:49,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871593369] [2020-10-27 22:42:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:42:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:49,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:49,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:49,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:49,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:49,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:54,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:54,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-27 22:42:54,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:42:54,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 22:42:54,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 22:42:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 118 [2020-10-27 22:42:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 22:42:54,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:54,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:42:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:54,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:54,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:54,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:42:54,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:42:54,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:42:54,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:54,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:54,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:42:54,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:54,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:54,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:42:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:54,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:54,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:54,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:54,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 22:42:54,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:54,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-27 22:42:54,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:54,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 22:42:54,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:54,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 22:42:54,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:54,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 22:42:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:54,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:54,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:55,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:55,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 22:42:55,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:55,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 22:42:55,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:55,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 22:42:55,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:42:55,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 22:42:55,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:55,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-27 22:42:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:55,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:55,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:55,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:42:55,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 22:42:55,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:42:55,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-27 22:42:55,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:42:55,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:42:55,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 22:42:55,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:42:55,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:42:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2290 backedges. 231 proven. 1777 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-10-27 22:42:55,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871593369] [2020-10-27 22:42:55,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:42:55,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 22:42:55,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059308763] [2020-10-27 22:42:55,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 22:42:55,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:42:55,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 22:42:55,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2020-10-27 22:42:55,304 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 24 states. [2020-10-27 22:42:56,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:42:56,820 INFO L93 Difference]: Finished difference Result 173 states and 208 transitions. [2020-10-27 22:42:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 22:42:56,821 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 182 [2020-10-27 22:42:56,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:42:56,822 INFO L225 Difference]: With dead ends: 173 [2020-10-27 22:42:56,822 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 22:42:56,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 22:42:56,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 22:42:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-10-27 22:42:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 22:42:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-10-27 22:42:56,832 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 182 [2020-10-27 22:42:56,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:42:56,833 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-10-27 22:42:56,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 22:42:56,833 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-10-27 22:42:56,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-27 22:42:56,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:42:56,835 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:42:56,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 22:42:56,836 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:42:56,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:42:56,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1301598717, now seen corresponding path program 10 times [2020-10-27 22:42:56,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:42:56,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824282888] [2020-10-27 22:42:56,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:42:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:42:56,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:56,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:56,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:56,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:42:57,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:01,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:01,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-27 22:43:01,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:43:01,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 22:43:01,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:01,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 22:43:01,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-27 22:43:01,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 22:43:01,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:02,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:43:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:02,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:02,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:02,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:43:02,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:43:02,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:43:02,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:02,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:43:02,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:43:02,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:43:02,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:02,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:43:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:02,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:02,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:02,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:02,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 22:43:02,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:02,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-27 22:43:02,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:02,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 22:43:02,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:43:02,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 22:43:02,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:02,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-27 22:43:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:02,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:02,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:03,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:03,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 22:43:03,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:03,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-27 22:43:03,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:03,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 22:43:03,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:43:03,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 22:43:03,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:03,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-27 22:43:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:03,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:03,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:03,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:03,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 22:43:03,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:03,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 22:43:03,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:03,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:43:03,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 22:43:03,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:43:03,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 276 proven. 2117 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-10-27 22:43:03,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824282888] [2020-10-27 22:43:03,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:43:03,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 22:43:03,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569777373] [2020-10-27 22:43:03,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 22:43:03,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:43:03,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 22:43:03,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2020-10-27 22:43:03,323 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 26 states. [2020-10-27 22:43:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:43:04,898 INFO L93 Difference]: Finished difference Result 185 states and 222 transitions. [2020-10-27 22:43:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 22:43:04,898 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 196 [2020-10-27 22:43:04,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:43:04,899 INFO L225 Difference]: With dead ends: 185 [2020-10-27 22:43:04,900 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 22:43:04,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 22:43:04,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 22:43:04,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2020-10-27 22:43:04,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 22:43:04,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2020-10-27 22:43:04,909 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 196 [2020-10-27 22:43:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:43:04,909 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2020-10-27 22:43:04,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 22:43:04,910 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2020-10-27 22:43:04,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-27 22:43:04,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:43:04,913 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:43:04,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 22:43:04,913 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:43:04,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:43:04,914 INFO L82 PathProgramCache]: Analyzing trace with hash 468355964, now seen corresponding path program 11 times [2020-10-27 22:43:04,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:43:04,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950986217] [2020-10-27 22:43:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:43:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:04,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:04,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:05,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:05,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:05,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:09,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:09,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-27 22:43:09,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:43:09,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 22:43:09,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:09,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 22:43:09,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 134 [2020-10-27 22:43:09,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 22:43:09,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:10,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:43:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:10,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:10,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:10,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:43:10,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:43:10,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:43:10,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:10,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:43:10,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:43:10,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:43:10,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:10,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:43:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:10,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:10,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:10,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:10,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 22:43:10,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:10,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-27 22:43:10,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:10,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 22:43:10,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:43:10,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 22:43:10,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:10,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-27 22:43:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:10,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:11,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:11,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:11,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 22:43:11,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:11,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-27 22:43:11,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:11,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 22:43:11,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:43:11,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 22:43:11,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:11,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-27 22:43:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:11,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:11,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:11,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:11,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 22:43:11,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:11,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-27 22:43:11,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:11,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:43:11,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 22:43:11,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:43:11,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 325 proven. 2487 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-10-27 22:43:11,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950986217] [2020-10-27 22:43:11,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:43:11,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 22:43:11,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770865707] [2020-10-27 22:43:11,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 22:43:11,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:43:11,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 22:43:11,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2020-10-27 22:43:11,492 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand 28 states. [2020-10-27 22:43:13,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:43:13,180 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2020-10-27 22:43:13,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 22:43:13,181 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 210 [2020-10-27 22:43:13,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:43:13,183 INFO L225 Difference]: With dead ends: 197 [2020-10-27 22:43:13,183 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 22:43:13,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=437, Invalid=1285, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 22:43:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 22:43:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2020-10-27 22:43:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 22:43:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2020-10-27 22:43:13,194 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 210 [2020-10-27 22:43:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:43:13,194 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2020-10-27 22:43:13,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 22:43:13,195 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2020-10-27 22:43:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-27 22:43:13,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:43:13,197 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:43:13,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 22:43:13,197 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:43:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:43:13,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1686760181, now seen corresponding path program 12 times [2020-10-27 22:43:13,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:43:13,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052707708] [2020-10-27 22:43:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:43:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:13,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:13,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:13,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:13,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:13,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:18,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:18,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-27 22:43:18,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:43:18,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 22:43:18,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 22:43:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 142 [2020-10-27 22:43:18,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 22:43:18,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:18,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:43:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:18,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:18,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:18,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:43:18,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:43:18,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:43:18,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:18,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:43:18,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:43:18,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:43:18,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:18,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:43:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:18,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:18,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:18,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:18,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 22:43:18,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:18,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-27 22:43:18,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:18,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 22:43:18,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:43:18,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 22:43:18,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:19,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-27 22:43:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:19,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:19,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:19,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:19,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 22:43:19,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:19,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-27 22:43:19,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:19,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 22:43:19,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:43:19,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 22:43:19,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:19,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-27 22:43:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:19,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:19,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:19,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:19,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 22:43:19,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:19,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-27 22:43:19,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:19,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:43:19,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 22:43:19,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:43:19,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3706 backedges. 378 proven. 2887 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-27 22:43:19,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052707708] [2020-10-27 22:43:19,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:43:19,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 22:43:19,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497213699] [2020-10-27 22:43:19,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 22:43:19,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:43:19,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 22:43:19,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2020-10-27 22:43:19,960 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand 30 states. [2020-10-27 22:43:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:43:22,005 INFO L93 Difference]: Finished difference Result 209 states and 250 transitions. [2020-10-27 22:43:22,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 22:43:22,007 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 224 [2020-10-27 22:43:22,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:43:22,008 INFO L225 Difference]: With dead ends: 209 [2020-10-27 22:43:22,009 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 22:43:22,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=498, Invalid=1482, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 22:43:22,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 22:43:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2020-10-27 22:43:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 22:43:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2020-10-27 22:43:22,019 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 224 [2020-10-27 22:43:22,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:43:22,019 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2020-10-27 22:43:22,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 22:43:22,019 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2020-10-27 22:43:22,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-27 22:43:22,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:43:22,021 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:43:22,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 22:43:22,022 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:43:22,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:43:22,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1822495634, now seen corresponding path program 13 times [2020-10-27 22:43:22,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:43:22,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538382677] [2020-10-27 22:43:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:43:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:22,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:22,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:22,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:22,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:22,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:27,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:27,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-27 22:43:27,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:43:27,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 22:43:27,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:27,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 22:43:27,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 150 [2020-10-27 22:43:27,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 22:43:27,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:27,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:43:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:27,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:27,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:27,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:43:27,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:43:27,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:43:27,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:27,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:43:27,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:43:27,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:43:27,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:27,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:43:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:27,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:27,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:27,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:27,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 22:43:27,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:27,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-27 22:43:27,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:27,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 22:43:27,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:43:27,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 22:43:27,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:28,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-27 22:43:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:28,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:28,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:28,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:28,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 22:43:28,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:28,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 22:43:28,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:28,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 22:43:28,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:43:28,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 22:43:28,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:28,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-10-27 22:43:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:28,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:28,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:28,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:28,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 22:43:28,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:28,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-27 22:43:28,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:28,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:43:28,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 22:43:28,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:43:28,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4254 backedges. 435 proven. 3317 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2020-10-27 22:43:28,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538382677] [2020-10-27 22:43:28,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:43:28,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 22:43:28,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750147648] [2020-10-27 22:43:28,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 22:43:28,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:43:28,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 22:43:28,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2020-10-27 22:43:28,856 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand 32 states. [2020-10-27 22:43:31,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:43:31,029 INFO L93 Difference]: Finished difference Result 221 states and 264 transitions. [2020-10-27 22:43:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 22:43:31,030 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 238 [2020-10-27 22:43:31,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:43:31,032 INFO L225 Difference]: With dead ends: 221 [2020-10-27 22:43:31,032 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 22:43:31,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=563, Invalid=1693, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 22:43:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 22:43:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2020-10-27 22:43:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 22:43:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2020-10-27 22:43:31,042 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 238 [2020-10-27 22:43:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:43:31,042 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2020-10-27 22:43:31,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 22:43:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2020-10-27 22:43:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-27 22:43:31,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:43:31,044 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:43:31,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 22:43:31,044 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:43:31,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:43:31,045 INFO L82 PathProgramCache]: Analyzing trace with hash 960966631, now seen corresponding path program 14 times [2020-10-27 22:43:31,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:43:31,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875188271] [2020-10-27 22:43:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:43:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:31,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:31,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:31,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:31,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:31,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:36,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:36,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-27 22:43:36,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:43:36,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 22:43:36,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:36,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 22:43:36,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-10-27 22:43:36,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 22:43:36,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:36,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:43:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:36,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:36,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:36,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:43:36,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:43:36,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:43:36,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:36,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:43:36,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:43:36,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:43:36,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:36,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:43:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:36,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:36,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:36,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:36,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 22:43:36,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:36,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-27 22:43:36,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:36,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 22:43:36,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:43:36,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 22:43:36,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:37,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-27 22:43:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:37,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:37,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:37,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:37,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 22:43:37,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:37,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-27 22:43:37,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:37,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 22:43:37,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:43:37,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 22:43:37,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:37,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-10-27 22:43:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:37,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:37,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:38,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:38,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 22:43:38,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:38,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-27 22:43:38,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:38,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:43:38,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 22:43:38,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:43:38,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 496 proven. 3777 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2020-10-27 22:43:38,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875188271] [2020-10-27 22:43:38,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:43:38,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 22:43:38,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351681076] [2020-10-27 22:43:38,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 22:43:38,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:43:38,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 22:43:38,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 22:43:38,231 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand 34 states. [2020-10-27 22:43:40,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:43:40,471 INFO L93 Difference]: Finished difference Result 233 states and 278 transitions. [2020-10-27 22:43:40,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 22:43:40,472 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 252 [2020-10-27 22:43:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:43:40,474 INFO L225 Difference]: With dead ends: 233 [2020-10-27 22:43:40,474 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 22:43:40,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=632, Invalid=1918, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 22:43:40,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 22:43:40,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2020-10-27 22:43:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 22:43:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2020-10-27 22:43:40,483 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 252 [2020-10-27 22:43:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:43:40,483 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2020-10-27 22:43:40,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 22:43:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2020-10-27 22:43:40,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-27 22:43:40,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:43:40,485 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:43:40,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 22:43:40,486 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:43:40,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:43:40,486 INFO L82 PathProgramCache]: Analyzing trace with hash 48780640, now seen corresponding path program 15 times [2020-10-27 22:43:40,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:43:40,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382218928] [2020-10-27 22:43:40,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:43:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:40,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:40,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:40,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:40,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:40,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:45,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:45,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-27 22:43:45,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:43:45,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 22:43:45,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:45,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 22:43:45,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 166 [2020-10-27 22:43:45,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 22:43:45,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:45,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:43:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:45,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:45,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:45,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:43:45,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:43:45,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:43:45,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:43:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:43:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:43:45,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:45,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:43:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:45,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:45,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:46,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:46,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 22:43:46,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:46,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 22:43:46,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 22:43:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:43:46,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 22:43:46,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:47,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 22:43:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:47,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:47,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:47,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:47,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 22:43:47,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:47,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-27 22:43:47,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:47,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 22:43:47,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:43:47,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 22:43:47,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:47,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-10-27 22:43:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:47,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:47,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:47,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:47,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 22:43:47,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:47,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-27 22:43:47,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:47,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:43:47,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 22:43:47,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:43:47,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5464 backedges. 561 proven. 4267 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2020-10-27 22:43:47,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382218928] [2020-10-27 22:43:47,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:43:47,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 22:43:47,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665766511] [2020-10-27 22:43:47,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 22:43:47,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:43:47,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 22:43:47,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 22:43:47,943 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand 36 states. [2020-10-27 22:43:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:43:50,492 INFO L93 Difference]: Finished difference Result 245 states and 292 transitions. [2020-10-27 22:43:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 22:43:50,493 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 266 [2020-10-27 22:43:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:43:50,494 INFO L225 Difference]: With dead ends: 245 [2020-10-27 22:43:50,495 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 22:43:50,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=705, Invalid=2157, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 22:43:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 22:43:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2020-10-27 22:43:50,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 22:43:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2020-10-27 22:43:50,504 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 266 [2020-10-27 22:43:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:43:50,505 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2020-10-27 22:43:50,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 22:43:50,505 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2020-10-27 22:43:50,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-27 22:43:50,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:43:50,507 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:43:50,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 22:43:50,507 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:43:50,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:43:50,508 INFO L82 PathProgramCache]: Analyzing trace with hash -894436135, now seen corresponding path program 16 times [2020-10-27 22:43:50,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:43:50,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230387871] [2020-10-27 22:43:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:43:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:50,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:50,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:50,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:50,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:51,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:55,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:55,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 294 [2020-10-27 22:43:55,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:43:55,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 22:43:55,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:55,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 22:43:55,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-27 22:43:55,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 22:43:55,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:56,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:43:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:56,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:56,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:56,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:43:56,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:43:56,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 22:43:56,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:56,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:43:56,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:43:56,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:43:56,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:56,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:43:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:56,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:56,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:56,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:56,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 22:43:56,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:56,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-27 22:43:56,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 22:43:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:43:56,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 22:43:56,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:57,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-27 22:43:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:57,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:57,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:57,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:57,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 22:43:57,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:57,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-27 22:43:57,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:57,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 22:43:57,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:43:57,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 22:43:57,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:57,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-10-27 22:43:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:43:57,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:57,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:43:58,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:43:58,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 22:43:58,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:43:58,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-27 22:43:58,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:43:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:43:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 22:43:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:43:58,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:43:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6126 backedges. 630 proven. 4787 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2020-10-27 22:43:58,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230387871] [2020-10-27 22:43:58,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:43:58,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 22:43:58,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331884700] [2020-10-27 22:43:58,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 22:43:58,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:43:58,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 22:43:58,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 22:43:58,137 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand 38 states. [2020-10-27 22:44:00,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:44:00,856 INFO L93 Difference]: Finished difference Result 257 states and 306 transitions. [2020-10-27 22:44:00,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 22:44:00,857 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 280 [2020-10-27 22:44:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:44:00,859 INFO L225 Difference]: With dead ends: 257 [2020-10-27 22:44:00,859 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 22:44:00,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=782, Invalid=2410, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 22:44:00,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 22:44:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2020-10-27 22:44:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-27 22:44:00,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 157 transitions. [2020-10-27 22:44:00,869 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 157 transitions. Word has length 280 [2020-10-27 22:44:00,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:44:00,869 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 157 transitions. [2020-10-27 22:44:00,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 22:44:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 157 transitions. [2020-10-27 22:44:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-10-27 22:44:00,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:44:00,872 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 16, 16, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:44:00,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 22:44:00,872 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:44:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:44:00,872 INFO L82 PathProgramCache]: Analyzing trace with hash 718521938, now seen corresponding path program 17 times [2020-10-27 22:44:00,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:44:00,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841838230] [2020-10-27 22:44:00,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:44:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:00,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:00,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:00,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:01,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:01,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:05,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:05,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-27 22:44:05,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:44:05,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 22:44:05,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:05,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 22:44:05,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 182 [2020-10-27 22:44:05,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 22:44:05,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:06,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:44:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:06,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:06,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:06,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:44:06,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:44:06,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:44:06,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:06,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:44:06,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:44:06,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:44:06,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:06,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:44:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:06,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:06,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:06,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:06,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 22:44:06,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:44:06,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-27 22:44:06,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:06,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 22:44:06,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:44:06,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 22:44:06,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:07,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-27 22:44:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:07,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:07,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:08,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:08,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 22:44:08,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:44:08,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-27 22:44:08,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:08,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 22:44:08,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:44:08,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 22:44:08,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:08,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-10-27 22:44:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:08,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:08,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:08,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:08,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 22:44:08,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:44:08,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-27 22:44:08,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:08,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:44:08,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 22:44:08,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:44:08,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6826 backedges. 703 proven. 5337 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-10-27 22:44:08,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841838230] [2020-10-27 22:44:08,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:44:08,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 22:44:08,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586334162] [2020-10-27 22:44:08,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 22:44:08,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:44:08,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 22:44:08,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 22:44:08,838 INFO L87 Difference]: Start difference. First operand 134 states and 157 transitions. Second operand 40 states. [2020-10-27 22:44:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:44:11,699 INFO L93 Difference]: Finished difference Result 266 states and 316 transitions. [2020-10-27 22:44:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 22:44:11,700 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 294 [2020-10-27 22:44:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:44:11,701 INFO L225 Difference]: With dead ends: 266 [2020-10-27 22:44:11,702 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 22:44:11,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=863, Invalid=2677, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 22:44:11,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 22:44:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-27 22:44:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 22:44:11,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 164 transitions. [2020-10-27 22:44:11,712 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 164 transitions. Word has length 294 [2020-10-27 22:44:11,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:44:11,712 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 164 transitions. [2020-10-27 22:44:11,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 22:44:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 164 transitions. [2020-10-27 22:44:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-27 22:44:11,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:44:11,715 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 17, 17, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:44:11,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 22:44:11,715 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:44:11,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:44:11,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1890496053, now seen corresponding path program 18 times [2020-10-27 22:44:11,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:44:11,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040116549] [2020-10-27 22:44:11,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:44:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:11,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:11,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:11,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:14,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:15,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:16,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:16,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-27 22:44:16,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 22:44:16,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5084 [2020-10-27 22:44:16,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:16,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 22:44:16,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-10-27 22:44:16,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 22:44:16,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:17,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:44:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:17,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:17,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:17,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:44:17,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:44:17,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:44:17,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:17,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:44:17,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:44:17,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:44:17,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:17,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:44:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:17,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:17,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:17,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 22:44:17,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:44:17,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 22:44:17,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:17,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:44:17,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:44:17,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:44:17,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:17,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-27 22:44:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:17,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:17,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:17,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 22:44:17,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:44:17,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 22:44:17,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:17,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:44:17,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:44:17,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:44:17,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:17,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-10-27 22:44:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:17,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:17,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:17,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 22:44:17,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:44:17,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 22:44:17,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:17,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:44:17,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 22:44:17,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:44:17,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 7275 trivial. 0 not checked. [2020-10-27 22:44:17,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040116549] [2020-10-27 22:44:17,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:44:17,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 22:44:17,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774976951] [2020-10-27 22:44:17,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 22:44:17,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:44:17,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 22:44:17,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 22:44:17,606 INFO L87 Difference]: Start difference. First operand 140 states and 164 transitions. Second operand 21 states. [2020-10-27 22:44:18,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:44:18,127 INFO L93 Difference]: Finished difference Result 236 states and 281 transitions. [2020-10-27 22:44:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 22:44:18,131 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 308 [2020-10-27 22:44:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:44:18,133 INFO L225 Difference]: With dead ends: 236 [2020-10-27 22:44:18,133 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 22:44:18,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 22:44:18,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 22:44:18,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-27 22:44:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-27 22:44:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 166 transitions. [2020-10-27 22:44:18,140 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 166 transitions. Word has length 308 [2020-10-27 22:44:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:44:18,141 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 166 transitions. [2020-10-27 22:44:18,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 22:44:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 166 transitions. [2020-10-27 22:44:18,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-27 22:44:18,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:44:18,143 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 18, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:44:18,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 22:44:18,143 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:44:18,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:44:18,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1709382313, now seen corresponding path program 19 times [2020-10-27 22:44:18,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:44:18,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152776100] [2020-10-27 22:44:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:44:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:18,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:18,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:18,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:20,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:23,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:23,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-27 22:44:23,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 22:44:23,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-27 22:44:23,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:23,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 22:44:23,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-10-27 22:44:23,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 22:44:23,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:23,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:44:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:23,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:23,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:23,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:44:23,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:44:23,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 22:44:23,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:23,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:44:23,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:44:23,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:44:23,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:23,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:44:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:23,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:23,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:23,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 22:44:23,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:44:23,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 22:44:23,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:23,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:44:23,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:44:23,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:44:23,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:23,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-27 22:44:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:23,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:23,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:23,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 22:44:23,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:44:23,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 22:44:23,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:23,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:44:23,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:44:23,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:44:23,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:23,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2020-10-27 22:44:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:23,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:23,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:23,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 22:44:23,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:44:23,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 22:44:23,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:44:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 22:44:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:44:23,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7599 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 7275 trivial. 0 not checked. [2020-10-27 22:44:24,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152776100] [2020-10-27 22:44:24,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:44:24,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 22:44:24,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565708973] [2020-10-27 22:44:24,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 22:44:24,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:44:24,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 22:44:24,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 22:44:24,038 INFO L87 Difference]: Start difference. First operand 142 states and 166 transitions. Second operand 22 states. [2020-10-27 22:44:24,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:44:24,528 INFO L93 Difference]: Finished difference Result 237 states and 282 transitions. [2020-10-27 22:44:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 22:44:24,529 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 310 [2020-10-27 22:44:24,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:44:24,531 INFO L225 Difference]: With dead ends: 237 [2020-10-27 22:44:24,531 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 22:44:24,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 22:44:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 22:44:24,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-27 22:44:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 22:44:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 168 transitions. [2020-10-27 22:44:24,540 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 168 transitions. Word has length 310 [2020-10-27 22:44:24,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:44:24,540 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 168 transitions. [2020-10-27 22:44:24,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 22:44:24,541 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 168 transitions. [2020-10-27 22:44:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-27 22:44:24,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:44:24,543 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:44:24,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 22:44:24,543 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:44:24,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:44:24,543 INFO L82 PathProgramCache]: Analyzing trace with hash -551148537, now seen corresponding path program 20 times [2020-10-27 22:44:24,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:44:24,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067209696] [2020-10-27 22:44:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:44:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:24,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:24,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:26,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:29,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:29,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:29,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-27 22:44:29,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 22:44:29,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5311 [2020-10-27 22:44:29,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:29,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 22:44:29,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 22:44:29,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-27 22:44:29,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:30,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 22:44:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:30,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:30,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:30,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 22:44:30,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:44:30,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 22:44:30,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:30,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:44:30,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:44:30,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:44:30,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:30,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-27 22:44:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:30,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:30,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:31,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:31,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 22:44:31,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:44:31,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1372 [2020-10-27 22:44:31,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 22:44:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 22:44:31,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 22:44:31,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:31,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-27 22:44:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:31,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:31,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:32,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:32,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 22:44:32,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 22:44:32,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1172 [2020-10-27 22:44:32,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:32,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 22:44:32,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 22:44:32,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 22:44:32,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:33,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-10-27 22:44:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:33,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:33,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 22:44:33,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 22:44:33,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 22:44:33,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 22:44:33,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 22:44:33,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 22:44:33,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 22:44:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 22:44:33,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 22:44:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7636 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 3892 trivial. 0 not checked. [2020-10-27 22:44:33,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067209696] [2020-10-27 22:44:33,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 22:44:33,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 22:44:33,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846741843] [2020-10-27 22:44:33,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 22:44:33,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 22:44:33,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 22:44:33,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 22:44:33,328 INFO L87 Difference]: Start difference. First operand 144 states and 168 transitions. Second operand 11 states. [2020-10-27 22:44:33,949 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-27 22:44:34,131 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-27 22:44:34,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 22:44:34,505 INFO L93 Difference]: Finished difference Result 369 states and 438 transitions. [2020-10-27 22:44:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 22:44:34,506 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 312 [2020-10-27 22:44:34,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 22:44:34,511 INFO L225 Difference]: With dead ends: 369 [2020-10-27 22:44:34,511 INFO L226 Difference]: Without dead ends: 236 [2020-10-27 22:44:34,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-27 22:44:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-27 22:44:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 228. [2020-10-27 22:44:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-27 22:44:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 275 transitions. [2020-10-27 22:44:34,532 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 275 transitions. Word has length 312 [2020-10-27 22:44:34,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 22:44:34,533 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 275 transitions. [2020-10-27 22:44:34,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 22:44:34,533 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 275 transitions. [2020-10-27 22:44:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-27 22:44:34,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 22:44:34,537 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 59, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 22:44:34,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 22:44:34,539 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 22:44:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 22:44:34,540 INFO L82 PathProgramCache]: Analyzing trace with hash -421283959, now seen corresponding path program 1 times [2020-10-27 22:44:34,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 22:44:34,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982098212] [2020-10-27 22:44:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 22:44:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 22:44:34,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 22:44:35,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking...