/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:45:05,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:45:05,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:45:05,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:45:05,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:45:05,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:45:05,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:45:05,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:45:05,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:45:05,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:45:05,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:45:05,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:45:05,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:45:05,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:45:05,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:45:05,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:45:05,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:45:05,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:45:05,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:45:05,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:45:05,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:45:05,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:45:05,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:45:05,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:45:05,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:45:05,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:45:05,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:45:05,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:45:05,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:45:05,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:45:05,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:45:05,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:45:05,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:45:05,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:45:05,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:45:05,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:45:05,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:45:05,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:45:05,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:45:05,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:45:05,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:45:05,351 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 20:45:05,414 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:45:05,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:45:05,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:45:05,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:45:05,420 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:45:05,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:45:05,422 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:45:05,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:45:05,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:45:05,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:45:05,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:45:05,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:45:05,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:45:05,425 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:45:05,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:45:05,425 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:45:05,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:45:05,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:45:05,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:45:05,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:45:05,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:45:05,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:45:05,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:45:05,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:45:05,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:45:05,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:45:05,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:45:05,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:45:05,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:45:05,428 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:45:05,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:45:05,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:45:05,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:45:05,944 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:45:05,945 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:45:05,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label24.c [2020-10-26 20:45:06,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db4244750/08ea23cdc5a8452a88b5eaa38c8372af/FLAG25d031b46 [2020-10-26 20:45:06,872 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:45:06,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label24.c [2020-10-26 20:45:06,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db4244750/08ea23cdc5a8452a88b5eaa38c8372af/FLAG25d031b46 [2020-10-26 20:45:06,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db4244750/08ea23cdc5a8452a88b5eaa38c8372af [2020-10-26 20:45:07,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:45:07,009 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:45:07,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:45:07,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:45:07,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:45:07,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:45:06" (1/1) ... [2020-10-26 20:45:07,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@274f5357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:07, skipping insertion in model container [2020-10-26 20:45:07,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:45:06" (1/1) ... [2020-10-26 20:45:07,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:45:07,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:45:07,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:45:07,951 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:45:08,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:45:08,243 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:45:08,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:08 WrapperNode [2020-10-26 20:45:08,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:45:08,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:45:08,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:45:08,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:45:08,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:08" (1/1) ... [2020-10-26 20:45:08,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:08" (1/1) ... [2020-10-26 20:45:08,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:08" (1/1) ... [2020-10-26 20:45:08,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:08" (1/1) ... [2020-10-26 20:45:08,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:08" (1/1) ... [2020-10-26 20:45:08,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:08" (1/1) ... [2020-10-26 20:45:08,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:08" (1/1) ... [2020-10-26 20:45:08,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:45:08,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:45:08,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:45:08,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:45:08,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:45:08,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:45:08,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:45:08,548 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:45:08,548 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:45:08,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:45:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:45:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:45:08,549 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:45:08,549 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:45:08,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:45:08,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:45:08,549 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:45:08,549 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:45:08,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:45:08,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:45:08,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:45:08,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:45:08,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:45:08,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:45:11,510 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:45:11,510 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:45:11,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:45:11 BoogieIcfgContainer [2020-10-26 20:45:11,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:45:11,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:45:11,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:45:11,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:45:11,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:45:06" (1/3) ... [2020-10-26 20:45:11,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38da81b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:45:11, skipping insertion in model container [2020-10-26 20:45:11,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:45:08" (2/3) ... [2020-10-26 20:45:11,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38da81b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:45:11, skipping insertion in model container [2020-10-26 20:45:11,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:45:11" (3/3) ... [2020-10-26 20:45:11,523 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label24.c [2020-10-26 20:45:11,536 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:45:11,542 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:45:11,557 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:45:11,590 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:45:11,590 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:45:11,590 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:45:11,590 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:45:11,590 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:45:11,590 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:45:11,591 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:45:11,591 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:45:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:45:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-26 20:45:11,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:11,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:11,638 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:11,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1866826472, now seen corresponding path program 1 times [2020-10-26 20:45:11,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:11,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699487897] [2020-10-26 20:45:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:12,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:13,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:16,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:16,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-26 20:45:16,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:16,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4500 [2020-10-26 20:45:16,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:16,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:45:16,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:16,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:45:16,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:45:17,356 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-26 20:45:17,515 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 20:45:17,670 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 20:45:17,841 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 20:45:18,007 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 20:45:18,146 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 20:45:18,679 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:18,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:18,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:18,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:18,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:18,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:18,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 20:45:18,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:18,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:18,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:18,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:18,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:45:19,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699487897] [2020-10-26 20:45:19,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:45:19,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:45:19,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291337775] [2020-10-26 20:45:19,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:45:19,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:19,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:45:19,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:45:19,597 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:45:20,210 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-26 20:45:21,309 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 200 DAG size of output: 196 [2020-10-26 20:45:22,363 WARN L193 SmtUtils]: Spent 985.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 196 [2020-10-26 20:45:23,485 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 212 DAG size of output: 204 [2020-10-26 20:45:25,273 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 225 DAG size of output: 203 [2020-10-26 20:45:27,218 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 225 DAG size of output: 202 [2020-10-26 20:45:29,303 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 228 DAG size of output: 201 [2020-10-26 20:45:33,394 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 229 DAG size of output: 200 [2020-10-26 20:45:34,757 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 231 DAG size of output: 198 [2020-10-26 20:45:37,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:37,775 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:45:37,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:45:37,777 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 198 [2020-10-26 20:45:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:37,794 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:45:37,794 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:45:37,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:45:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:45:37,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:45:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:45:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:45:37,883 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 198 [2020-10-26 20:45:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:37,884 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:45:37,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:45:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:45:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-26 20:45:37,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:37,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:37,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:45:37,891 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:37,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:37,892 INFO L82 PathProgramCache]: Analyzing trace with hash 267162645, now seen corresponding path program 1 times [2020-10-26 20:45:37,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:37,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853306327] [2020-10-26 20:45:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:38,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:38,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:39,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:42,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:42,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-26 20:45:42,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:42,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4907 [2020-10-26 20:45:42,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:42,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:45:42,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:42,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-26 20:45:42,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:43,269 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:43,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:43,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:43,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:43,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:43,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:43,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:45:43,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:43,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:43,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:43,426 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:45:43,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:43,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:43,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:43,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:43,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:45:43,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:43,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 20:45:43,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:43,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:43,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:43,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:45:43,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:45:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:45:43,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853306327] [2020-10-26 20:45:43,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:43,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:45:43,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469757735] [2020-10-26 20:45:43,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:45:43,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:43,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:45:43,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:45:43,622 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 6 states. [2020-10-26 20:45:43,876 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:47,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:47,139 INFO L93 Difference]: Finished difference Result 831 states and 1293 transitions. [2020-10-26 20:45:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:45:47,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 209 [2020-10-26 20:45:47,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:47,147 INFO L225 Difference]: With dead ends: 831 [2020-10-26 20:45:47,147 INFO L226 Difference]: Without dead ends: 587 [2020-10-26 20:45:47,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:45:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-26 20:45:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 581. [2020-10-26 20:45:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2020-10-26 20:45:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 780 transitions. [2020-10-26 20:45:47,223 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 780 transitions. Word has length 209 [2020-10-26 20:45:47,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:47,225 INFO L481 AbstractCegarLoop]: Abstraction has 581 states and 780 transitions. [2020-10-26 20:45:47,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:45:47,225 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 780 transitions. [2020-10-26 20:45:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-26 20:45:47,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:47,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:47,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:45:47,237 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:47,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:47,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1465516737, now seen corresponding path program 1 times [2020-10-26 20:45:47,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:47,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691758528] [2020-10-26 20:45:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:47,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:47,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:48,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:48,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-26 20:45:48,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:48,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 991 [2020-10-26 20:45:48,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:48,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:48,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:45:48,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 181 [2020-10-26 20:45:48,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:49,012 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:49,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:49,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:49,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:49,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:49,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:49,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:45:49,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:49,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:45:49,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:49,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:45:49,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:49,161 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:45:49,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:49,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:49,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:49,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:45:49,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:49,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:45:49,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:49,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:49,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:49,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:45:49,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:45:49,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691758528] [2020-10-26 20:45:49,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:49,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:45:49,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125399333] [2020-10-26 20:45:49,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:45:49,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:49,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:45:49,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:45:49,626 INFO L87 Difference]: Start difference. First operand 581 states and 780 transitions. Second operand 5 states. [2020-10-26 20:45:50,151 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-26 20:45:53,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:53,187 INFO L93 Difference]: Finished difference Result 1221 states and 1756 transitions. [2020-10-26 20:45:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:45:53,192 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 219 [2020-10-26 20:45:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:53,197 INFO L225 Difference]: With dead ends: 1221 [2020-10-26 20:45:53,198 INFO L226 Difference]: Without dead ends: 571 [2020-10-26 20:45:53,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:45:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-10-26 20:45:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 569. [2020-10-26 20:45:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-10-26 20:45:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 731 transitions. [2020-10-26 20:45:53,232 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 731 transitions. Word has length 219 [2020-10-26 20:45:53,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:53,232 INFO L481 AbstractCegarLoop]: Abstraction has 569 states and 731 transitions. [2020-10-26 20:45:53,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:45:53,233 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 731 transitions. [2020-10-26 20:45:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-26 20:45:53,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:53,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:53,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:45:53,237 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:53,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:53,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1790617512, now seen corresponding path program 1 times [2020-10-26 20:45:53,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:53,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454856339] [2020-10-26 20:45:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:53,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:53,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:55,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:56,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:56,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-10-26 20:45:56,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:56,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2811 [2020-10-26 20:45:56,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:56,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:45:56,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:56,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:45:56,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:56,409 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:56,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:56,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:56,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:56,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:56,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:56,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:45:56,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:56,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:56,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:56,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:56,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 20:45:56,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:56,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:56,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:56,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:45:56,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:56,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-26 20:45:56,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:56,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:56,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:56,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:45:56,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:45:57,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454856339] [2020-10-26 20:45:57,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:45:57,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:45:57,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037100169] [2020-10-26 20:45:57,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:57,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:57,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:57,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:57,005 INFO L87 Difference]: Start difference. First operand 569 states and 731 transitions. Second operand 7 states. [2020-10-26 20:45:57,295 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:45:57,897 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:46:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:01,387 INFO L93 Difference]: Finished difference Result 1515 states and 2010 transitions. [2020-10-26 20:46:01,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:46:01,388 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 230 [2020-10-26 20:46:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:01,398 INFO L225 Difference]: With dead ends: 1515 [2020-10-26 20:46:01,399 INFO L226 Difference]: Without dead ends: 1055 [2020-10-26 20:46:01,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:46:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2020-10-26 20:46:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1015. [2020-10-26 20:46:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2020-10-26 20:46:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1285 transitions. [2020-10-26 20:46:01,475 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1285 transitions. Word has length 230 [2020-10-26 20:46:01,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:01,475 INFO L481 AbstractCegarLoop]: Abstraction has 1015 states and 1285 transitions. [2020-10-26 20:46:01,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:46:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1285 transitions. [2020-10-26 20:46:01,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-26 20:46:01,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:01,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:01,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:46:01,481 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:01,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:01,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2069467451, now seen corresponding path program 1 times [2020-10-26 20:46:01,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:01,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631343841] [2020-10-26 20:46:01,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:01,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:02,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:03,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:04,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:04,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-26 20:46:04,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:46:04,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2873 [2020-10-26 20:46:04,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:04,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:46:04,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:04,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-10-26 20:46:04,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:04,951 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:04,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:04,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:04,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:04,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:04,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:04,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:46:04,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:04,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:04,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:04,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:05,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:05,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:05,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:05,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:46:05,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:05,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-26 20:46:05,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:05,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:46:05,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:05,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:46:05,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:46:05,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631343841] [2020-10-26 20:46:05,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:05,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:46:05,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452078333] [2020-10-26 20:46:05,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:46:05,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:05,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:46:05,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:46:05,892 INFO L87 Difference]: Start difference. First operand 1015 states and 1285 transitions. Second operand 8 states. [2020-10-26 20:46:06,156 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:06,768 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 20:46:11,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:11,426 INFO L93 Difference]: Finished difference Result 3029 states and 3980 transitions. [2020-10-26 20:46:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:46:11,429 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 233 [2020-10-26 20:46:11,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:11,440 INFO L225 Difference]: With dead ends: 3029 [2020-10-26 20:46:11,440 INFO L226 Difference]: Without dead ends: 1943 [2020-10-26 20:46:11,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:46:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2020-10-26 20:46:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1923. [2020-10-26 20:46:11,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1923 states. [2020-10-26 20:46:11,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 2459 transitions. [2020-10-26 20:46:11,509 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 2459 transitions. Word has length 233 [2020-10-26 20:46:11,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:11,509 INFO L481 AbstractCegarLoop]: Abstraction has 1923 states and 2459 transitions. [2020-10-26 20:46:11,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:46:11,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 2459 transitions. [2020-10-26 20:46:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 20:46:11,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:11,517 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:11,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:46:11,517 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:11,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:11,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1336923948, now seen corresponding path program 1 times [2020-10-26 20:46:11,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:11,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271222170] [2020-10-26 20:46:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:11,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:11,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:11,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:16,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:16,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:16,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-26 20:46:16,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:46:16,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 20:46:16,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:46:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:46:16,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:16,885 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:16,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:16,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:16,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:16,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:16,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:16,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:46:16,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:16,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:16,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:16,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:16,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:17,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:17,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:17,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:17,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:46:17,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:17,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 20:46:17,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:17,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:17,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:46:17,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:17,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:46:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:17,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:17,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:17,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:46:17,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:17,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:46:17,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:17,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:17,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:17,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:46:17,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:17,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 20:46:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:17,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:17,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:17,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:46:17,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:17,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:46:17,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:17,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:17,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-26 20:46:17,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:17,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:46:17,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271222170] [2020-10-26 20:46:17,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:17,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:46:17,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720791109] [2020-10-26 20:46:17,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:46:17,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:17,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:46:17,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:46:17,266 INFO L87 Difference]: Start difference. First operand 1923 states and 2459 transitions. Second operand 8 states. [2020-10-26 20:46:17,537 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:18,369 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:21,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:21,970 INFO L93 Difference]: Finished difference Result 5700 states and 7976 transitions. [2020-10-26 20:46:21,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:46:21,971 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 258 [2020-10-26 20:46:21,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:22,002 INFO L225 Difference]: With dead ends: 5700 [2020-10-26 20:46:22,003 INFO L226 Difference]: Without dead ends: 3886 [2020-10-26 20:46:22,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:46:22,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3886 states. [2020-10-26 20:46:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3886 to 3689. [2020-10-26 20:46:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3689 states. [2020-10-26 20:46:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3689 states to 3689 states and 4561 transitions. [2020-10-26 20:46:22,161 INFO L78 Accepts]: Start accepts. Automaton has 3689 states and 4561 transitions. Word has length 258 [2020-10-26 20:46:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:22,161 INFO L481 AbstractCegarLoop]: Abstraction has 3689 states and 4561 transitions. [2020-10-26 20:46:22,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:46:22,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3689 states and 4561 transitions. [2020-10-26 20:46:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-26 20:46:22,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:22,173 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:22,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:46:22,173 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:22,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:22,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1973072162, now seen corresponding path program 1 times [2020-10-26 20:46:22,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:22,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874777825] [2020-10-26 20:46:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:22,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:22,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:23,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:26,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:26,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:27,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:27,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-26 20:46:27,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:46:27,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 20:46:27,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:27,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:46:27,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:27,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 20:46:27,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:27,547 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:27,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:27,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:27,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:27,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:27,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:27,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:46:27,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:27,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:27,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:27,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:27,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:27,721 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:46:27,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:27,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:27,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:27,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:46:27,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:46:27,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:46:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:27,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:46:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:27,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:27,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:27,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 20:46:27,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:27,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-26 20:46:27,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:27,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:27,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 20:46:27,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:46:28,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874777825] [2020-10-26 20:46:28,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:28,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:46:28,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308563016] [2020-10-26 20:46:28,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:46:28,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:28,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:46:28,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:46:28,109 INFO L87 Difference]: Start difference. First operand 3689 states and 4561 transitions. Second operand 8 states. [2020-10-26 20:46:28,396 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:46:31,516 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:34,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:34,417 INFO L93 Difference]: Finished difference Result 12196 states and 16114 transitions. [2020-10-26 20:46:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:46:34,418 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 264 [2020-10-26 20:46:34,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:34,470 INFO L225 Difference]: With dead ends: 12196 [2020-10-26 20:46:34,470 INFO L226 Difference]: Without dead ends: 8616 [2020-10-26 20:46:34,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:46:34,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8616 states. [2020-10-26 20:46:34,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8616 to 8506. [2020-10-26 20:46:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8506 states. [2020-10-26 20:46:34,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 11003 transitions. [2020-10-26 20:46:34,766 INFO L78 Accepts]: Start accepts. Automaton has 8506 states and 11003 transitions. Word has length 264 [2020-10-26 20:46:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:34,767 INFO L481 AbstractCegarLoop]: Abstraction has 8506 states and 11003 transitions. [2020-10-26 20:46:34,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:46:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 8506 states and 11003 transitions. [2020-10-26 20:46:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-26 20:46:34,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:34,795 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:34,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:46:34,796 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1262927934, now seen corresponding path program 1 times [2020-10-26 20:46:34,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:34,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186957320] [2020-10-26 20:46:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:34,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:35,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:35,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:38,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:38,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 20:46:38,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:46:38,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3753 [2020-10-26 20:46:38,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:38,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:46:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:46:38,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:46:38,905 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:38,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:38,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:38,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:38,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:38,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:38,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:46:38,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:38,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:38,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:38,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:38,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:46:39,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:39,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:39,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:39,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:46:39,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:39,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:46:39,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:39,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:39,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:39,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:46:39,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:39,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:46:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:39,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:39,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:39,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 20:46:39,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:39,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-26 20:46:39,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 20:46:39,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 20:46:39,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186957320] [2020-10-26 20:46:39,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:39,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:46:39,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341238800] [2020-10-26 20:46:39,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:46:39,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:39,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:46:39,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:46:39,461 INFO L87 Difference]: Start difference. First operand 8506 states and 11003 transitions. Second operand 7 states. [2020-10-26 20:46:39,726 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:41,121 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:46:43,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:43,855 INFO L93 Difference]: Finished difference Result 18030 states and 24222 transitions. [2020-10-26 20:46:43,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:46:43,856 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 273 [2020-10-26 20:46:43,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:43,932 INFO L225 Difference]: With dead ends: 18030 [2020-10-26 20:46:43,932 INFO L226 Difference]: Without dead ends: 10712 [2020-10-26 20:46:43,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:46:43,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10712 states. [2020-10-26 20:46:44,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10712 to 10527. [2020-10-26 20:46:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10527 states. [2020-10-26 20:46:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10527 states to 10527 states and 14030 transitions. [2020-10-26 20:46:44,406 INFO L78 Accepts]: Start accepts. Automaton has 10527 states and 14030 transitions. Word has length 273 [2020-10-26 20:46:44,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:44,406 INFO L481 AbstractCegarLoop]: Abstraction has 10527 states and 14030 transitions. [2020-10-26 20:46:44,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:46:44,407 INFO L276 IsEmpty]: Start isEmpty. Operand 10527 states and 14030 transitions. [2020-10-26 20:46:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-26 20:46:44,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:44,447 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:44,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:46:44,447 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:44,448 INFO L82 PathProgramCache]: Analyzing trace with hash -222329212, now seen corresponding path program 1 times [2020-10-26 20:46:44,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:44,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043167326] [2020-10-26 20:46:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:44,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:44,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:45,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:49,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:49,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:49,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 302 [2020-10-26 20:46:49,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:46:49,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 20:46:49,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:49,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:46:49,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:49,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 293 [2020-10-26 20:46:49,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:49,897 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:49,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:49,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:49,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:49,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:49,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:49,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:46:49,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:49,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:49,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:49,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:49,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:50,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:50,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:50,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:50,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:46:50,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:50,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:46:50,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:50,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:50,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:50,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:46:50,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:50,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:46:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:50,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:50,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:50,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:46:50,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:50,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-26 20:46:50,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:50,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:50,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:50,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 20:46:50,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 20:46:50,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043167326] [2020-10-26 20:46:50,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:50,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:46:50,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985328108] [2020-10-26 20:46:50,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:46:50,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:50,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:46:50,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:46:50,420 INFO L87 Difference]: Start difference. First operand 10527 states and 14030 transitions. Second operand 6 states. [2020-10-26 20:46:50,688 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:53,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:53,678 INFO L93 Difference]: Finished difference Result 19286 states and 25952 transitions. [2020-10-26 20:46:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:46:53,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 288 [2020-10-26 20:46:53,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:53,741 INFO L225 Difference]: With dead ends: 19286 [2020-10-26 20:46:53,741 INFO L226 Difference]: Without dead ends: 10232 [2020-10-26 20:46:53,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:46:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10232 states. [2020-10-26 20:46:54,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10232 to 9920. [2020-10-26 20:46:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9920 states. [2020-10-26 20:46:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9920 states to 9920 states and 12328 transitions. [2020-10-26 20:46:54,158 INFO L78 Accepts]: Start accepts. Automaton has 9920 states and 12328 transitions. Word has length 288 [2020-10-26 20:46:54,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:54,159 INFO L481 AbstractCegarLoop]: Abstraction has 9920 states and 12328 transitions. [2020-10-26 20:46:54,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:46:54,159 INFO L276 IsEmpty]: Start isEmpty. Operand 9920 states and 12328 transitions. [2020-10-26 20:46:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-26 20:46:54,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:54,184 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:54,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:46:54,184 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:54,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:54,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1188009385, now seen corresponding path program 1 times [2020-10-26 20:46:54,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:54,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881897191] [2020-10-26 20:46:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:54,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:55,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:57,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:57,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-26 20:46:57,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:46:57,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2778 [2020-10-26 20:46:57,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:57,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 20:46:57,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:57,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 243 [2020-10-26 20:46:57,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:58,534 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:58,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:58,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:58,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:58,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:58,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:58,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:46:58,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:58,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:58,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:58,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:58,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:58,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:58,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:58,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:58,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:46:58,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:58,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-26 20:46:58,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:58,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:46:58,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:58,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:46:58,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:59,369 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-26 20:47:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:47:00,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881897191] [2020-10-26 20:47:00,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:00,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 20:47:00,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819855444] [2020-10-26 20:47:00,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 20:47:00,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:00,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 20:47:00,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:47:00,546 INFO L87 Difference]: Start difference. First operand 9920 states and 12328 transitions. Second operand 16 states. [2020-10-26 20:47:01,005 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-26 20:47:03,263 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-10-26 20:47:03,574 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-26 20:47:03,999 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2020-10-26 20:47:05,063 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 212 DAG size of output: 200 [2020-10-26 20:47:06,229 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 222 DAG size of output: 208 [2020-10-26 20:47:08,109 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 221 DAG size of output: 207 [2020-10-26 20:47:10,427 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 222 DAG size of output: 206 [2020-10-26 20:47:12,683 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 222 DAG size of output: 205 [2020-10-26 20:47:15,968 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 223 DAG size of output: 204 [2020-10-26 20:47:17,876 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 223 DAG size of output: 202 [2020-10-26 20:47:18,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:18,551 INFO L93 Difference]: Finished difference Result 18876 states and 23816 transitions. [2020-10-26 20:47:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 20:47:18,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 298 [2020-10-26 20:47:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:18,586 INFO L225 Difference]: With dead ends: 18876 [2020-10-26 20:47:18,587 INFO L226 Difference]: Without dead ends: 10357 [2020-10-26 20:47:18,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2020-10-26 20:47:18,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10357 states. [2020-10-26 20:47:18,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10357 to 10069. [2020-10-26 20:47:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10069 states. [2020-10-26 20:47:18,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10069 states to 10069 states and 12496 transitions. [2020-10-26 20:47:18,862 INFO L78 Accepts]: Start accepts. Automaton has 10069 states and 12496 transitions. Word has length 298 [2020-10-26 20:47:18,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:18,862 INFO L481 AbstractCegarLoop]: Abstraction has 10069 states and 12496 transitions. [2020-10-26 20:47:18,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 20:47:18,863 INFO L276 IsEmpty]: Start isEmpty. Operand 10069 states and 12496 transitions. [2020-10-26 20:47:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-26 20:47:18,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:18,890 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:18,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:47:18,891 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:18,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:18,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1716715359, now seen corresponding path program 1 times [2020-10-26 20:47:18,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:18,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949363513] [2020-10-26 20:47:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:19,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:19,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:19,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:23,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:23,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:23,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-26 20:47:23,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:47:23,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 20:47:23,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:23,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:47:23,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:23,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 20:47:23,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:24,262 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:24,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:24,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:24,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:24,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:24,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:24,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:47:24,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:24,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:24,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:24,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:24,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:24,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:24,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:24,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:24,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:47:24,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:24,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-26 20:47:24,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:24,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:24,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:24,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:47:24,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:24,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:47:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:24,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:24,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:24,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:47:24,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:24,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-26 20:47:24,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:24,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:24,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:24,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 20:47:24,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:24,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 20:47:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:24,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:24,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:24,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:47:24,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:24,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:47:24,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:24,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:24,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 20:47:24,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:24,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 100 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:47:24,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949363513] [2020-10-26 20:47:24,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:24,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:47:24,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174874631] [2020-10-26 20:47:24,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:47:24,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:24,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:47:24,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:47:24,980 INFO L87 Difference]: Start difference. First operand 10069 states and 12496 transitions. Second operand 7 states. [2020-10-26 20:47:25,256 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:47:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:28,739 INFO L93 Difference]: Finished difference Result 27076 states and 34461 transitions. [2020-10-26 20:47:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:47:28,740 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 302 [2020-10-26 20:47:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:28,798 INFO L225 Difference]: With dead ends: 27076 [2020-10-26 20:47:28,798 INFO L226 Difference]: Without dead ends: 18545 [2020-10-26 20:47:28,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:47:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18545 states. [2020-10-26 20:47:29,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18545 to 18223. [2020-10-26 20:47:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18223 states. [2020-10-26 20:47:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18223 states to 18223 states and 23019 transitions. [2020-10-26 20:47:29,328 INFO L78 Accepts]: Start accepts. Automaton has 18223 states and 23019 transitions. Word has length 302 [2020-10-26 20:47:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:29,329 INFO L481 AbstractCegarLoop]: Abstraction has 18223 states and 23019 transitions. [2020-10-26 20:47:29,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:29,329 INFO L276 IsEmpty]: Start isEmpty. Operand 18223 states and 23019 transitions. [2020-10-26 20:47:29,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-26 20:47:29,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:29,371 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:29,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:47:29,371 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:29,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:29,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1896453034, now seen corresponding path program 1 times [2020-10-26 20:47:29,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:29,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580609295] [2020-10-26 20:47:29,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:29,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:29,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:31,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:32,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:32,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-26 20:47:32,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:47:32,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2867 [2020-10-26 20:47:32,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:32,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:32,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-26 20:47:32,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-26 20:47:32,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:32,589 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:32,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:32,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:32,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:32,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:32,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:32,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:47:32,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:32,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:32,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:32,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:32,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:32,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:47:32,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:32,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:47:32,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:32,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:32,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:32,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 20:47:32,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:32,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:47:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:32,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:33,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:33,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:47:33,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:33,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-26 20:47:33,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:33,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:33,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:33,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:47:33,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:47:33,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580609295] [2020-10-26 20:47:33,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:33,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:47:33,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561297579] [2020-10-26 20:47:33,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:47:33,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:33,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:47:33,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:47:33,272 INFO L87 Difference]: Start difference. First operand 18223 states and 23019 transitions. Second operand 7 states. [2020-10-26 20:47:33,650 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:47:35,685 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:47:38,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:38,027 INFO L93 Difference]: Finished difference Result 50864 states and 65681 transitions. [2020-10-26 20:47:38,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:47:38,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 309 [2020-10-26 20:47:38,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:38,140 INFO L225 Difference]: With dead ends: 50864 [2020-10-26 20:47:38,140 INFO L226 Difference]: Without dead ends: 32885 [2020-10-26 20:47:38,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:47:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32885 states. [2020-10-26 20:47:38,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32885 to 32610. [2020-10-26 20:47:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32610 states. [2020-10-26 20:47:38,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32610 states to 32610 states and 41697 transitions. [2020-10-26 20:47:38,953 INFO L78 Accepts]: Start accepts. Automaton has 32610 states and 41697 transitions. Word has length 309 [2020-10-26 20:47:38,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:38,954 INFO L481 AbstractCegarLoop]: Abstraction has 32610 states and 41697 transitions. [2020-10-26 20:47:38,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:38,954 INFO L276 IsEmpty]: Start isEmpty. Operand 32610 states and 41697 transitions. [2020-10-26 20:47:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-26 20:47:38,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:38,997 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:38,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:47:38,998 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:38,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:38,998 INFO L82 PathProgramCache]: Analyzing trace with hash -576401726, now seen corresponding path program 1 times [2020-10-26 20:47:38,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:38,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214619007] [2020-10-26 20:47:38,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:39,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:39,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:41,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:42,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:44,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:44,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-26 20:47:44,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:47:44,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 20:47:44,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:44,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:47:44,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:44,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 20:47:44,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:44,345 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:44,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:44,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:44,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:44,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:44,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:44,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:47:44,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:44,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:44,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:44,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:44,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:44,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:44,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:44,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:44,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:47:44,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:44,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:47:44,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:44,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:44,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:44,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:47:44,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:44,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:47:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:44,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:44,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:44,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:47:44,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:44,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-26 20:47:44,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:44,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:44,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:44,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:47:44,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:44,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 20:47:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:44,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:44,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:44,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 20:47:44,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:44,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 20:47:44,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:44,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:44,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-26 20:47:44,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:44,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 109 proven. 41 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:47:44,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214619007] [2020-10-26 20:47:44,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:44,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:47:44,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625984599] [2020-10-26 20:47:44,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:47:44,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:44,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:47:44,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:47:44,843 INFO L87 Difference]: Start difference. First operand 32610 states and 41697 transitions. Second operand 7 states. [2020-10-26 20:47:45,139 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:47:46,320 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:47:49,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:49,663 INFO L93 Difference]: Finished difference Result 74283 states and 97571 transitions. [2020-10-26 20:47:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:47:49,663 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 311 [2020-10-26 20:47:49,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:49,807 INFO L225 Difference]: With dead ends: 74283 [2020-10-26 20:47:49,808 INFO L226 Difference]: Without dead ends: 42337 [2020-10-26 20:47:49,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:47:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42337 states. [2020-10-26 20:47:50,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42337 to 41720. [2020-10-26 20:47:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41720 states. [2020-10-26 20:47:51,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41720 states to 41720 states and 53344 transitions. [2020-10-26 20:47:51,016 INFO L78 Accepts]: Start accepts. Automaton has 41720 states and 53344 transitions. Word has length 311 [2020-10-26 20:47:51,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:51,017 INFO L481 AbstractCegarLoop]: Abstraction has 41720 states and 53344 transitions. [2020-10-26 20:47:51,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand 41720 states and 53344 transitions. [2020-10-26 20:47:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-26 20:47:51,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:51,069 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:51,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:47:51,069 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash -170385311, now seen corresponding path program 1 times [2020-10-26 20:47:51,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:51,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119352806] [2020-10-26 20:47:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:51,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:51,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:53,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:55,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:55,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:55,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 340 [2020-10-26 20:47:55,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:47:55,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4522 [2020-10-26 20:47:55,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:55,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:47:55,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:55,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 316 [2020-10-26 20:47:55,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:56,543 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:56,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:56,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:56,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:56,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:56,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:56,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:47:56,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:56,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:56,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:56,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:56,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:56,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:56,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:56,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:56,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:47:56,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:56,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-26 20:47:56,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:56,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:56,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:56,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:47:56,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:56,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:47:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:57,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:57,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:57,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 20:47:57,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:57,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-26 20:47:57,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:57,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:47:57,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:57,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 20:47:57,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 21 proven. 125 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:47:57,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119352806] [2020-10-26 20:47:57,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:57,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:47:57,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751566539] [2020-10-26 20:47:57,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:47:57,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:57,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:47:57,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:47:57,862 INFO L87 Difference]: Start difference. First operand 41720 states and 53344 transitions. Second operand 9 states. [2020-10-26 20:47:58,140 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:47:59,017 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-26 20:47:59,793 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 175 [2020-10-26 20:48:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:05,071 INFO L93 Difference]: Finished difference Result 120588 states and 161217 transitions. [2020-10-26 20:48:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:48:05,071 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 326 [2020-10-26 20:48:05,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:05,566 INFO L225 Difference]: With dead ends: 120588 [2020-10-26 20:48:05,567 INFO L226 Difference]: Without dead ends: 76459 [2020-10-26 20:48:05,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:48:05,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76459 states. [2020-10-26 20:48:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76459 to 74822. [2020-10-26 20:48:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74822 states. [2020-10-26 20:48:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74822 states to 74822 states and 94180 transitions. [2020-10-26 20:48:07,857 INFO L78 Accepts]: Start accepts. Automaton has 74822 states and 94180 transitions. Word has length 326 [2020-10-26 20:48:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:07,857 INFO L481 AbstractCegarLoop]: Abstraction has 74822 states and 94180 transitions. [2020-10-26 20:48:07,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:48:07,858 INFO L276 IsEmpty]: Start isEmpty. Operand 74822 states and 94180 transitions. [2020-10-26 20:48:07,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-10-26 20:48:07,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:07,913 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:07,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:48:07,914 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:07,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:07,914 INFO L82 PathProgramCache]: Analyzing trace with hash -857541263, now seen corresponding path program 1 times [2020-10-26 20:48:07,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:07,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370521388] [2020-10-26 20:48:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:08,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:08,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:12,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:12,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 350 [2020-10-26 20:48:12,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:48:12,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4754 [2020-10-26 20:48:12,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:12,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 20:48:12,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:12,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 279 [2020-10-26 20:48:12,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:14,127 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 20:48:14,287 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:48:14,717 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 88 [2020-10-26 20:48:15,255 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 88 [2020-10-26 20:48:15,929 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 93 [2020-10-26 20:48:16,637 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 93 [2020-10-26 20:48:17,203 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 80 [2020-10-26 20:48:17,705 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 71 [2020-10-26 20:48:18,087 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 50 [2020-10-26 20:48:18,398 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:18,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:18,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:18,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:18,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:18,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:18,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:48:18,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:18,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:18,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:18,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:18,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:18,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:18,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:18,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:18,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:48:18,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:18,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:48:18,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:18,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:48:18,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:18,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:48:18,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:18,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:48:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:18,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:19,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:19,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 20:48:19,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:19,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-26 20:48:19,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:19,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:48:19,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:19,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-26 20:48:19,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:19,661 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-26 20:48:19,928 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-10-26 20:48:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 9 proven. 131 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:48:21,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370521388] [2020-10-26 20:48:21,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:21,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 20:48:21,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420232367] [2020-10-26 20:48:21,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 20:48:21,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:21,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 20:48:21,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-26 20:48:21,935 INFO L87 Difference]: Start difference. First operand 74822 states and 94180 transitions. Second operand 19 states. [2020-10-26 20:48:22,889 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 182 [2020-10-26 20:48:23,266 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-26 20:48:25,464 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 20:48:26,740 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 94 [2020-10-26 20:48:27,266 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-26 20:48:27,833 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 103 [2020-10-26 20:48:29,200 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 250 DAG size of output: 223 [2020-10-26 20:48:30,788 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 270 DAG size of output: 242 [2020-10-26 20:48:31,912 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59