/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/loop-simple/deep-nested.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:56:20,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:56:20,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:56:20,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:56:20,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:56:20,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:56:20,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:56:20,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:56:20,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:56:20,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:56:20,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:56:20,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:56:20,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:56:20,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:56:20,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:56:20,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:56:20,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:56:20,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:56:20,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:56:20,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:56:20,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:56:20,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:56:20,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:56:20,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:56:20,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:56:20,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:56:20,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:56:20,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:56:20,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:56:20,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:56:20,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:56:20,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:56:20,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:56:20,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:56:20,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:56:20,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:56:20,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:56:20,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:56:20,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:56:20,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:56:20,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:56:20,316 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:56:20,349 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:56:20,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:56:20,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:56:20,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:56:20,355 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:56:20,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:56:20,355 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:56:20,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:56:20,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:56:20,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:56:20,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:56:20,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:56:20,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:56:20,357 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:56:20,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:56:20,359 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:56:20,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:56:20,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:56:20,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:56:20,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:56:20,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:56:20,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:56:20,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:56:20,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:56:20,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:56:20,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:56:20,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:56:20,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:56:20,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:56:20,363 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:56:20,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:56:20,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:56:20,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:56:20,807 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:56:20,808 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:56:20,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/deep-nested.c [2020-10-27 01:56:20,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b1ee0e98/b299ab20236f4101996b417d9ff0e066/FLAG744fa327f [2020-10-27 01:56:21,475 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:56:21,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-simple/deep-nested.c [2020-10-27 01:56:21,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b1ee0e98/b299ab20236f4101996b417d9ff0e066/FLAG744fa327f [2020-10-27 01:56:21,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b1ee0e98/b299ab20236f4101996b417d9ff0e066 [2020-10-27 01:56:21,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:56:21,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:56:21,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:56:21,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:56:21,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:56:21,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:56:21" (1/1) ... [2020-10-27 01:56:21,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@538a2b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:21, skipping insertion in model container [2020-10-27 01:56:21,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:56:21" (1/1) ... [2020-10-27 01:56:21,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:56:21,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:56:22,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:56:22,085 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:56:22,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:56:22,124 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:56:22,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:22 WrapperNode [2020-10-27 01:56:22,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:56:22,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:56:22,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:56:22,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:56:22,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:22" (1/1) ... [2020-10-27 01:56:22,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:22" (1/1) ... [2020-10-27 01:56:22,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:22" (1/1) ... [2020-10-27 01:56:22,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:22" (1/1) ... [2020-10-27 01:56:22,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:22" (1/1) ... [2020-10-27 01:56:22,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:22" (1/1) ... [2020-10-27 01:56:22,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:22" (1/1) ... [2020-10-27 01:56:22,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:56:22,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:56:22,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:56:22,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:56:22,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:56:22,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:56:22,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:56:22,253 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:56:22,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:56:22,253 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:56:22,253 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:56:22,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:56:22,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:56:22,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:56:22,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:56:22,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:56:22,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:56:22,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:56:22,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:56:22,588 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:56:22,589 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 01:56:22,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:56:22 BoogieIcfgContainer [2020-10-27 01:56:22,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:56:22,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:56:22,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:56:22,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:56:22,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:56:21" (1/3) ... [2020-10-27 01:56:22,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f71a1b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:56:22, skipping insertion in model container [2020-10-27 01:56:22,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:56:22" (2/3) ... [2020-10-27 01:56:22,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f71a1b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:56:22, skipping insertion in model container [2020-10-27 01:56:22,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:56:22" (3/3) ... [2020-10-27 01:56:22,611 INFO L111 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2020-10-27 01:56:22,639 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:56:22,650 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:56:22,693 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:56:22,746 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:56:22,746 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:56:22,746 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:56:22,746 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:56:22,746 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:56:22,747 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:56:22,747 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:56:22,747 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:56:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-27 01:56:22,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:56:22,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:22,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:22,781 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:22,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:22,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1376373702, now seen corresponding path program 1 times [2020-10-27 01:56:22,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:22,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458970553] [2020-10-27 01:56:22,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:23,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:23,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:23,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:56:23,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:23,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-10-27 01:56:23,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:23,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:56:23,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:23,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:56:23,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:56:23,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:23,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:23,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:23,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:23,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:23,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 01:56:23,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:23,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:23,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:23,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:23,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:56:23,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458970553] [2020-10-27 01:56:23,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:56:23,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:56:23,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592645046] [2020-10-27 01:56:23,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:56:23,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:23,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:56:23,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:56:23,648 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 4 states. [2020-10-27 01:56:23,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:23,938 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2020-10-27 01:56:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:56:23,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-27 01:56:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:23,949 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:56:23,949 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:56:23,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:56:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:56:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-27 01:56:24,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:56:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-27 01:56:24,003 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 14 [2020-10-27 01:56:24,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:24,003 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-27 01:56:24,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:56:24,004 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-27 01:56:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:56:24,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:24,005 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:24,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:56:24,006 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:24,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:24,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1966143318, now seen corresponding path program 1 times [2020-10-27 01:56:24,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:24,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574185988] [2020-10-27 01:56:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:24,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:24,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:24,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:24,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:24,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:24,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:24,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:24,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:24,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:24,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:25,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:56:25,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 01:56:25,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1100 [2020-10-27 01:56:25,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:25,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:56:25,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:25,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:56:25,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:56:25,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:25,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:25,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:25,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:25,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:56:25,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:25,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:25,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:25,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:25,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:56:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:56:25,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574185988] [2020-10-27 01:56:25,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:56:25,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:56:25,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568279378] [2020-10-27 01:56:25,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:56:25,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:25,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:56:25,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:56:25,331 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 5 states. [2020-10-27 01:56:25,569 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-27 01:56:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:25,721 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-10-27 01:56:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:56:25,722 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 01:56:25,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:25,724 INFO L225 Difference]: With dead ends: 67 [2020-10-27 01:56:25,724 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 01:56:25,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:56:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 01:56:25,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2020-10-27 01:56:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:56:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2020-10-27 01:56:25,758 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2020-10-27 01:56:25,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:25,760 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2020-10-27 01:56:25,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:56:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2020-10-27 01:56:25,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:56:25,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:25,764 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:25,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:56:25,764 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:25,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:25,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1363327582, now seen corresponding path program 1 times [2020-10-27 01:56:25,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:25,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183893670] [2020-10-27 01:56:25,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:25,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:25,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:26,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:26,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:26,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:26,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:26,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:26,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:26,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:26,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:26,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:26,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:27,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:28,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:28,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:56:28,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 01:56:28,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3043 [2020-10-27 01:56:28,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:28,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:56:28,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:28,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:56:28,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:28,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:28,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:28,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:28,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:28,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:28,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:56:28,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:28,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:28,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:28,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:28,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:56:28,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183893670] [2020-10-27 01:56:28,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:28,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:56:28,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295993935] [2020-10-27 01:56:28,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:56:28,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:28,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:56:28,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:56:28,962 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 6 states. [2020-10-27 01:56:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:29,343 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2020-10-27 01:56:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:56:29,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-27 01:56:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:29,345 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:56:29,346 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:56:29,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:56:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:56:29,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-10-27 01:56:29,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:56:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2020-10-27 01:56:29,363 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 20 [2020-10-27 01:56:29,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:29,363 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2020-10-27 01:56:29,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:56:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2020-10-27 01:56:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:56:29,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:29,365 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:29,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:56:29,365 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:29,366 INFO L82 PathProgramCache]: Analyzing trace with hash -138000982, now seen corresponding path program 2 times [2020-10-27 01:56:29,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:29,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494051972] [2020-10-27 01:56:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:29,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:29,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:29,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:29,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:29,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:29,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:29,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:29,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:29,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:29,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:30,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:32,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:32,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:32,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:34,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:34,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:56:34,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-27 01:56:34,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:56:34,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:34,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:56:34,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:34,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:56:34,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:34,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:34,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:34,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:34,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:34,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:34,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:56:34,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:34,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:34,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:34,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:34,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 01:56:34,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494051972] [2020-10-27 01:56:34,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:34,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:56:34,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940837322] [2020-10-27 01:56:34,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:56:34,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:34,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:56:34,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:56:34,525 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand 5 states. [2020-10-27 01:56:34,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:34,804 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2020-10-27 01:56:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:56:34,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 01:56:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:34,806 INFO L225 Difference]: With dead ends: 117 [2020-10-27 01:56:34,807 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:56:34,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:56:34,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:56:34,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2020-10-27 01:56:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 01:56:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2020-10-27 01:56:34,843 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 23 [2020-10-27 01:56:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:34,844 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2020-10-27 01:56:34,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:56:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2020-10-27 01:56:34,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:56:34,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:34,847 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:34,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:56:34,848 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:34,848 INFO L82 PathProgramCache]: Analyzing trace with hash 100478058, now seen corresponding path program 1 times [2020-10-27 01:56:34,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:34,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768359047] [2020-10-27 01:56:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:34,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:34,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:34,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:35,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:35,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:35,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:35,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:35,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:35,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:35,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:35,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:35,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:37,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:39,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:39,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:56:39,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 01:56:39,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 01:56:39,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:39,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:56:39,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:39,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:56:39,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:40,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:40,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:40,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:40,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:40,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:40,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:56:40,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:40,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:40,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:40,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:40,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-27 01:56:40,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768359047] [2020-10-27 01:56:40,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:40,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:56:40,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756183611] [2020-10-27 01:56:40,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:56:40,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:40,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:56:40,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:56:40,050 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand 6 states. [2020-10-27 01:56:40,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:40,415 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2020-10-27 01:56:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:56:40,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-27 01:56:40,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:40,417 INFO L225 Difference]: With dead ends: 167 [2020-10-27 01:56:40,417 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 01:56:40,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:56:40,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 01:56:40,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2020-10-27 01:56:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 01:56:40,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 131 transitions. [2020-10-27 01:56:40,469 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 131 transitions. Word has length 41 [2020-10-27 01:56:40,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:40,470 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 131 transitions. [2020-10-27 01:56:40,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:56:40,470 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 131 transitions. [2020-10-27 01:56:40,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:56:40,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:40,478 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:40,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:56:40,479 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:40,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:40,479 INFO L82 PathProgramCache]: Analyzing trace with hash -795391574, now seen corresponding path program 2 times [2020-10-27 01:56:40,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:40,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746043214] [2020-10-27 01:56:40,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:40,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:40,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:40,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:40,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:40,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:40,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:40,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:40,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:41,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:41,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:45,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:45,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:56:45,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 01:56:45,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:56:45,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:45,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:56:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:56:45,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:45,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:45,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:45,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:45,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:45,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:45,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:56:45,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:45,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:45,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:45,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:45,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 21 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-27 01:56:45,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746043214] [2020-10-27 01:56:45,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:45,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:56:45,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76489210] [2020-10-27 01:56:45,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:56:45,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:45,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:56:45,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:56:45,754 INFO L87 Difference]: Start difference. First operand 102 states and 131 transitions. Second operand 7 states. [2020-10-27 01:56:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:46,384 INFO L93 Difference]: Finished difference Result 196 states and 254 transitions. [2020-10-27 01:56:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:56:46,385 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-27 01:56:46,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:46,387 INFO L225 Difference]: With dead ends: 196 [2020-10-27 01:56:46,387 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 01:56:46,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:56:46,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 01:56:46,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 119. [2020-10-27 01:56:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:56:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 153 transitions. [2020-10-27 01:56:46,418 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 153 transitions. Word has length 59 [2020-10-27 01:56:46,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:46,419 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 153 transitions. [2020-10-27 01:56:46,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:56:46,419 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 153 transitions. [2020-10-27 01:56:46,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 01:56:46,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:46,420 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:46,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:56:46,421 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:46,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:46,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1967992538, now seen corresponding path program 3 times [2020-10-27 01:56:46,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:46,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424869619] [2020-10-27 01:56:46,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:46,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:46,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:46,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:46,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:46,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:46,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:46,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:46,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:46,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:47,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:48,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:51,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:51,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 01:56:51,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:56:51,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 01:56:51,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:56:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:56:51,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:51,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:51,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:51,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:51,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:51,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:51,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:56:51,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:51,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:51,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:51,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:51,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 94 proven. 5 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2020-10-27 01:56:51,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424869619] [2020-10-27 01:56:51,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:51,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:56:51,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591423794] [2020-10-27 01:56:51,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:56:51,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:51,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:56:51,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:56:51,649 INFO L87 Difference]: Start difference. First operand 119 states and 153 transitions. Second operand 7 states. [2020-10-27 01:56:52,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:52,108 INFO L93 Difference]: Finished difference Result 288 states and 380 transitions. [2020-10-27 01:56:52,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:56:52,108 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-27 01:56:52,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:52,111 INFO L225 Difference]: With dead ends: 288 [2020-10-27 01:56:52,111 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 01:56:52,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:56:52,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 01:56:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 161. [2020-10-27 01:56:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 01:56:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 207 transitions. [2020-10-27 01:56:52,169 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 207 transitions. Word has length 68 [2020-10-27 01:56:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:52,170 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 207 transitions. [2020-10-27 01:56:52,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:56:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 207 transitions. [2020-10-27 01:56:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 01:56:52,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:52,173 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:52,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:56:52,173 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:52,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:52,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1401908890, now seen corresponding path program 4 times [2020-10-27 01:56:52,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:52,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400753287] [2020-10-27 01:56:52,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:52,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:52,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:52,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:52,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:52,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:52,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:52,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:52,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:52,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:52,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:53,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:53,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:57,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:57,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:56:57,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:56:57,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:56:57,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:57,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:56:57,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:56:57,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:56:57,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:57,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:56:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:57,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:57,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:56:57,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:56:57,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:56:57,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:56:57,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:56:57,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:56:57,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:56:57,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:56:57,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:56:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 394 proven. 20 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-10-27 01:56:57,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400753287] [2020-10-27 01:56:57,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:56:57,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:56:57,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674930002] [2020-10-27 01:56:57,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:56:57,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:56:57,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:56:57,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:56:57,590 INFO L87 Difference]: Start difference. First operand 161 states and 207 transitions. Second operand 8 states. [2020-10-27 01:56:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:56:58,284 INFO L93 Difference]: Finished difference Result 365 states and 479 transitions. [2020-10-27 01:56:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:56:58,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-10-27 01:56:58,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:56:58,287 INFO L225 Difference]: With dead ends: 365 [2020-10-27 01:56:58,287 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 01:56:58,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:56:58,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 01:56:58,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 203. [2020-10-27 01:56:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-27 01:56:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 261 transitions. [2020-10-27 01:56:58,354 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 261 transitions. Word has length 86 [2020-10-27 01:56:58,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:56:58,355 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 261 transitions. [2020-10-27 01:56:58,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:56:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 261 transitions. [2020-10-27 01:56:58,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 01:56:58,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:56:58,356 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:56:58,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:56:58,357 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:56:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:56:58,357 INFO L82 PathProgramCache]: Analyzing trace with hash 379691226, now seen corresponding path program 5 times [2020-10-27 01:56:58,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:56:58,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014759196] [2020-10-27 01:56:58,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:56:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:56:58,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:58,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:59,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:56:59,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:01,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:01,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:03,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:03,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 01:57:03,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 01:57:03,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:57:03,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:03,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:57:03,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:57:03,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:57:03,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:03,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:03,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:03,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:03,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:03,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:03,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:57:03,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:03,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:03,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:03,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:03,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 296 proven. 22 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2020-10-27 01:57:03,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014759196] [2020-10-27 01:57:03,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:03,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:57:03,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971574437] [2020-10-27 01:57:03,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:57:03,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:03,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:57:03,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:57:03,696 INFO L87 Difference]: Start difference. First operand 203 states and 261 transitions. Second operand 9 states. [2020-10-27 01:57:04,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:04,598 INFO L93 Difference]: Finished difference Result 442 states and 578 transitions. [2020-10-27 01:57:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:57:04,598 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 104 [2020-10-27 01:57:04,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:04,600 INFO L225 Difference]: With dead ends: 442 [2020-10-27 01:57:04,600 INFO L226 Difference]: Without dead ends: 276 [2020-10-27 01:57:04,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:57:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-27 01:57:04,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 245. [2020-10-27 01:57:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-27 01:57:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 315 transitions. [2020-10-27 01:57:04,651 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 315 transitions. Word has length 104 [2020-10-27 01:57:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:04,651 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 315 transitions. [2020-10-27 01:57:04,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:57:04,651 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 315 transitions. [2020-10-27 01:57:04,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 01:57:04,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:04,653 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:04,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:57:04,654 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:04,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:04,654 INFO L82 PathProgramCache]: Analyzing trace with hash -116498278, now seen corresponding path program 6 times [2020-10-27 01:57:04,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:04,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382184300] [2020-10-27 01:57:04,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:04,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:04,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:04,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:04,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:05,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:05,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:05,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:05,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:05,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:05,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:05,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:05,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:05,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:06,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:08,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:08,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:09,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:09,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 01:57:09,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 01:57:09,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 01:57:09,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:09,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:57:09,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:57:09,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:57:09,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:10,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:10,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:10,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:10,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:10,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:10,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:57:10,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:10,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:10,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:10,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:10,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1562 backedges. 442 proven. 35 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2020-10-27 01:57:10,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382184300] [2020-10-27 01:57:10,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:10,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:57:10,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230923477] [2020-10-27 01:57:10,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:57:10,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:10,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:57:10,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:57:10,051 INFO L87 Difference]: Start difference. First operand 245 states and 315 transitions. Second operand 10 states. [2020-10-27 01:57:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:10,811 INFO L93 Difference]: Finished difference Result 519 states and 677 transitions. [2020-10-27 01:57:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:57:10,812 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 122 [2020-10-27 01:57:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:10,814 INFO L225 Difference]: With dead ends: 519 [2020-10-27 01:57:10,814 INFO L226 Difference]: Without dead ends: 318 [2020-10-27 01:57:10,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:57:10,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-27 01:57:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 287. [2020-10-27 01:57:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-27 01:57:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 369 transitions. [2020-10-27 01:57:10,873 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 369 transitions. Word has length 122 [2020-10-27 01:57:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:10,873 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 369 transitions. [2020-10-27 01:57:10,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:57:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 369 transitions. [2020-10-27 01:57:10,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 01:57:10,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:10,875 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:10,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:57:10,875 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:10,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:10,876 INFO L82 PathProgramCache]: Analyzing trace with hash 20648666, now seen corresponding path program 7 times [2020-10-27 01:57:10,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:10,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235992234] [2020-10-27 01:57:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:11,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:11,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:12,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:15,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:15,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 01:57:15,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 01:57:15,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 01:57:15,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:15,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:57:15,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:57:15,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:57:15,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:16,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:16,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:16,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:16,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:16,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:16,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:57:16,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:16,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:16,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:16,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:16,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 995 proven. 172 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2020-10-27 01:57:16,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235992234] [2020-10-27 01:57:16,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:16,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:57:16,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656709065] [2020-10-27 01:57:16,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:57:16,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:16,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:57:16,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:57:16,313 INFO L87 Difference]: Start difference. First operand 287 states and 369 transitions. Second operand 11 states. [2020-10-27 01:57:17,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:17,696 INFO L93 Difference]: Finished difference Result 596 states and 776 transitions. [2020-10-27 01:57:17,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:57:17,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 140 [2020-10-27 01:57:17,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:17,699 INFO L225 Difference]: With dead ends: 596 [2020-10-27 01:57:17,700 INFO L226 Difference]: Without dead ends: 360 [2020-10-27 01:57:17,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:57:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-10-27 01:57:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 329. [2020-10-27 01:57:17,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-27 01:57:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 423 transitions. [2020-10-27 01:57:17,767 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 423 transitions. Word has length 140 [2020-10-27 01:57:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:17,767 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 423 transitions. [2020-10-27 01:57:17,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:57:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 423 transitions. [2020-10-27 01:57:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-27 01:57:17,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:17,773 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:17,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:57:17,773 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:17,774 INFO L82 PathProgramCache]: Analyzing trace with hash -244952422, now seen corresponding path program 8 times [2020-10-27 01:57:17,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:17,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329649802] [2020-10-27 01:57:17,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:18,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:18,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:19,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:19,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:22,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:22,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:22,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 01:57:22,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 01:57:22,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 01:57:22,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:22,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:57:22,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:57:22,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:57:22,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:23,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:23,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:23,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:23,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:23,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:23,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:57:23,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:23,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:23,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:23,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:23,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2924 backedges. 1479 proven. 78 refuted. 0 times theorem prover too weak. 1367 trivial. 0 not checked. [2020-10-27 01:57:23,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329649802] [2020-10-27 01:57:23,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:23,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:57:23,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107013693] [2020-10-27 01:57:23,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:57:23,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:23,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:57:23,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:57:23,362 INFO L87 Difference]: Start difference. First operand 329 states and 423 transitions. Second operand 12 states. [2020-10-27 01:57:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:24,550 INFO L93 Difference]: Finished difference Result 673 states and 875 transitions. [2020-10-27 01:57:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:57:24,551 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 158 [2020-10-27 01:57:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:24,554 INFO L225 Difference]: With dead ends: 673 [2020-10-27 01:57:24,554 INFO L226 Difference]: Without dead ends: 402 [2020-10-27 01:57:24,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:57:24,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-27 01:57:24,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 371. [2020-10-27 01:57:24,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-27 01:57:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 477 transitions. [2020-10-27 01:57:24,616 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 477 transitions. Word has length 158 [2020-10-27 01:57:24,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:24,617 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 477 transitions. [2020-10-27 01:57:24,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:57:24,617 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 477 transitions. [2020-10-27 01:57:24,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-27 01:57:24,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:24,620 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 48, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:24,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:57:24,620 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:24,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1788445914, now seen corresponding path program 9 times [2020-10-27 01:57:24,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:24,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589490597] [2020-10-27 01:57:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:24,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:24,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:25,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:26,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:26,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:29,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:29,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-27 01:57:29,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 01:57:29,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 01:57:29,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:29,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:57:29,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:57:29,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:57:29,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:30,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:30,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:30,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:30,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:30,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:30,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:57:30,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:30,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:30,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:30,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:30,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:57:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3767 backedges. 1060 proven. 92 refuted. 0 times theorem prover too weak. 2615 trivial. 0 not checked. [2020-10-27 01:57:30,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589490597] [2020-10-27 01:57:30,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:30,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:57:30,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077727895] [2020-10-27 01:57:30,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:57:30,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:30,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:57:30,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:57:30,102 INFO L87 Difference]: Start difference. First operand 371 states and 477 transitions. Second operand 13 states. [2020-10-27 01:57:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:31,936 INFO L93 Difference]: Finished difference Result 750 states and 974 transitions. [2020-10-27 01:57:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:57:31,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 176 [2020-10-27 01:57:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:31,941 INFO L225 Difference]: With dead ends: 750 [2020-10-27 01:57:31,941 INFO L226 Difference]: Without dead ends: 444 [2020-10-27 01:57:31,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:57:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-10-27 01:57:32,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 413. [2020-10-27 01:57:32,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-10-27 01:57:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 531 transitions. [2020-10-27 01:57:32,005 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 531 transitions. Word has length 176 [2020-10-27 01:57:32,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:32,005 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 531 transitions. [2020-10-27 01:57:32,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:57:32,005 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 531 transitions. [2020-10-27 01:57:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-27 01:57:32,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:32,008 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 54, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:32,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:57:32,009 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:32,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:32,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1410811034, now seen corresponding path program 10 times [2020-10-27 01:57:32,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:32,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709764153] [2020-10-27 01:57:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:32,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:32,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:32,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:32,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:32,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:32,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:32,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:32,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:32,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:33,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:33,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:33,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:33,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:33,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:33,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:33,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:33,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:34,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:34,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:37,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:37,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-27 01:57:37,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 01:57:37,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 01:57:37,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:37,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:57:37,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:57:37,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:57:37,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:37,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:37,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:37,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:37,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:37,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:37,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:57:37,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:37,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:37,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:37,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:37,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4718 backedges. 1326 proven. 117 refuted. 0 times theorem prover too weak. 3275 trivial. 0 not checked. [2020-10-27 01:57:37,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709764153] [2020-10-27 01:57:37,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:37,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:57:37,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77372058] [2020-10-27 01:57:37,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:57:37,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:37,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:57:37,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:57:37,575 INFO L87 Difference]: Start difference. First operand 413 states and 531 transitions. Second operand 14 states. [2020-10-27 01:57:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:39,767 INFO L93 Difference]: Finished difference Result 827 states and 1073 transitions. [2020-10-27 01:57:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:57:39,768 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 194 [2020-10-27 01:57:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:39,771 INFO L225 Difference]: With dead ends: 827 [2020-10-27 01:57:39,771 INFO L226 Difference]: Without dead ends: 486 [2020-10-27 01:57:39,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:57:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-10-27 01:57:39,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 455. [2020-10-27 01:57:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-27 01:57:39,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 585 transitions. [2020-10-27 01:57:39,861 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 585 transitions. Word has length 194 [2020-10-27 01:57:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:39,863 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 585 transitions. [2020-10-27 01:57:39,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:57:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 585 transitions. [2020-10-27 01:57:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-27 01:57:39,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:39,867 INFO L422 BasicCegarLoop]: trace histogram [61, 60, 60, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:39,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:57:39,867 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:39,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1748825818, now seen corresponding path program 11 times [2020-10-27 01:57:39,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:39,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095138575] [2020-10-27 01:57:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:40,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:40,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:40,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:40,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:40,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:40,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:40,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:41,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:41,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:41,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:41,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:41,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:41,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:41,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:41,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:41,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:41,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:41,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:41,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:45,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:45,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-27 01:57:45,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 01:57:45,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 01:57:45,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:45,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:57:45,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:57:45,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:57:45,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:45,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:45,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:45,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:45,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:45,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:45,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:57:45,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:45,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5777 backedges. 1622 proven. 145 refuted. 0 times theorem prover too weak. 4010 trivial. 0 not checked. [2020-10-27 01:57:45,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095138575] [2020-10-27 01:57:45,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:45,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:57:45,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852445476] [2020-10-27 01:57:45,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:57:45,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:45,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:57:45,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:57:45,688 INFO L87 Difference]: Start difference. First operand 455 states and 585 transitions. Second operand 15 states. [2020-10-27 01:57:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:47,700 INFO L93 Difference]: Finished difference Result 904 states and 1172 transitions. [2020-10-27 01:57:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:57:47,700 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 212 [2020-10-27 01:57:47,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:47,703 INFO L225 Difference]: With dead ends: 904 [2020-10-27 01:57:47,703 INFO L226 Difference]: Without dead ends: 528 [2020-10-27 01:57:47,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:57:47,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2020-10-27 01:57:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 497. [2020-10-27 01:57:47,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-27 01:57:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 639 transitions. [2020-10-27 01:57:47,791 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 639 transitions. Word has length 212 [2020-10-27 01:57:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:47,792 INFO L481 AbstractCegarLoop]: Abstraction has 497 states and 639 transitions. [2020-10-27 01:57:47,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:57:47,792 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 639 transitions. [2020-10-27 01:57:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-27 01:57:47,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:47,796 INFO L422 BasicCegarLoop]: trace histogram [67, 66, 66, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:47,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:57:47,796 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:47,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:47,797 INFO L82 PathProgramCache]: Analyzing trace with hash -660523366, now seen corresponding path program 12 times [2020-10-27 01:57:47,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:47,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828443131] [2020-10-27 01:57:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:48,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:48,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:48,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:48,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:48,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:48,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:49,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:49,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:49,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:49,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:49,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:49,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:49,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:49,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:49,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:49,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:49,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:49,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:52,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:52,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-27 01:57:52,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 01:57:52,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-27 01:57:52,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:52,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:57:52,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:57:52,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:57:52,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:53,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:57:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:53,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:53,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:57:53,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:57:53,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:57:53,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:57:53,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:57:53,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:57:53,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:57:53,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:57:53,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:57:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6944 backedges. 1948 proven. 176 refuted. 0 times theorem prover too weak. 4820 trivial. 0 not checked. [2020-10-27 01:57:53,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828443131] [2020-10-27 01:57:53,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:57:53,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:57:53,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155323592] [2020-10-27 01:57:53,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:57:53,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:57:53,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:57:53,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:57:53,528 INFO L87 Difference]: Start difference. First operand 497 states and 639 transitions. Second operand 16 states. [2020-10-27 01:57:56,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:57:56,306 INFO L93 Difference]: Finished difference Result 981 states and 1271 transitions. [2020-10-27 01:57:56,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:57:56,307 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 230 [2020-10-27 01:57:56,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:57:56,310 INFO L225 Difference]: With dead ends: 981 [2020-10-27 01:57:56,311 INFO L226 Difference]: Without dead ends: 570 [2020-10-27 01:57:56,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:57:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-10-27 01:57:56,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 539. [2020-10-27 01:57:56,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-10-27 01:57:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 693 transitions. [2020-10-27 01:57:56,401 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 693 transitions. Word has length 230 [2020-10-27 01:57:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:57:56,401 INFO L481 AbstractCegarLoop]: Abstraction has 539 states and 693 transitions. [2020-10-27 01:57:56,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:57:56,402 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 693 transitions. [2020-10-27 01:57:56,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-27 01:57:56,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:57:56,406 INFO L422 BasicCegarLoop]: trace histogram [73, 72, 72, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:57:56,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:57:56,406 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:57:56,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:57:56,407 INFO L82 PathProgramCache]: Analyzing trace with hash -274372390, now seen corresponding path program 13 times [2020-10-27 01:57:56,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:57:56,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444423022] [2020-10-27 01:57:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:57:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:57:56,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:57,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:57,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:57,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:57,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:57,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:57,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:57,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:57,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:57,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:57,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:58,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:58,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:58,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:58,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:58,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:58,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:58,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:59,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:57:59,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:01,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:01,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-27 01:58:01,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 01:58:01,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 01:58:01,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:01,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:58:01,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:01,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:58:01,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:02,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:02,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:02,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:02,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:02,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:02,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:02,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:02,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:02,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:02,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:02,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8219 backedges. 2304 proven. 210 refuted. 0 times theorem prover too weak. 5705 trivial. 0 not checked. [2020-10-27 01:58:02,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444423022] [2020-10-27 01:58:02,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:02,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:58:02,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396831308] [2020-10-27 01:58:02,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:58:02,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:02,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:58:02,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:58:02,586 INFO L87 Difference]: Start difference. First operand 539 states and 693 transitions. Second operand 17 states. [2020-10-27 01:58:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:05,168 INFO L93 Difference]: Finished difference Result 1058 states and 1370 transitions. [2020-10-27 01:58:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:58:05,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 248 [2020-10-27 01:58:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:05,174 INFO L225 Difference]: With dead ends: 1058 [2020-10-27 01:58:05,174 INFO L226 Difference]: Without dead ends: 612 [2020-10-27 01:58:05,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:58:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-10-27 01:58:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 581. [2020-10-27 01:58:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2020-10-27 01:58:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 747 transitions. [2020-10-27 01:58:05,296 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 747 transitions. Word has length 248 [2020-10-27 01:58:05,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:05,296 INFO L481 AbstractCegarLoop]: Abstraction has 581 states and 747 transitions. [2020-10-27 01:58:05,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:58:05,296 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 747 transitions. [2020-10-27 01:58:05,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-27 01:58:05,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:05,299 INFO L422 BasicCegarLoop]: trace histogram [79, 78, 78, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:05,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:58:05,300 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:05,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:05,300 INFO L82 PathProgramCache]: Analyzing trace with hash -695981926, now seen corresponding path program 14 times [2020-10-27 01:58:05,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:05,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811520484] [2020-10-27 01:58:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:05,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:06,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:06,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:06,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:06,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:06,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:06,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:07,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:10,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:10,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-27 01:58:10,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 01:58:10,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 01:58:10,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:10,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:58:10,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:10,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:58:10,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:11,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:11,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:11,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:11,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:11,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:11,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:58:11,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:11,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:11,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:11,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:11,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9602 backedges. 2690 proven. 247 refuted. 0 times theorem prover too weak. 6665 trivial. 0 not checked. [2020-10-27 01:58:11,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811520484] [2020-10-27 01:58:11,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:11,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:58:11,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429495319] [2020-10-27 01:58:11,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:58:11,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:11,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:58:11,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:58:11,497 INFO L87 Difference]: Start difference. First operand 581 states and 747 transitions. Second operand 18 states. [2020-10-27 01:58:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:14,473 INFO L93 Difference]: Finished difference Result 1135 states and 1469 transitions. [2020-10-27 01:58:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:58:14,473 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 266 [2020-10-27 01:58:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:14,477 INFO L225 Difference]: With dead ends: 1135 [2020-10-27 01:58:14,478 INFO L226 Difference]: Without dead ends: 654 [2020-10-27 01:58:14,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:58:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2020-10-27 01:58:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 623. [2020-10-27 01:58:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2020-10-27 01:58:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 801 transitions. [2020-10-27 01:58:14,602 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 801 transitions. Word has length 266 [2020-10-27 01:58:14,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:14,602 INFO L481 AbstractCegarLoop]: Abstraction has 623 states and 801 transitions. [2020-10-27 01:58:14,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:58:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 801 transitions. [2020-10-27 01:58:14,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-10-27 01:58:14,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:14,604 INFO L422 BasicCegarLoop]: trace histogram [85, 84, 84, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:14,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:58:14,605 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash -699213094, now seen corresponding path program 15 times [2020-10-27 01:58:14,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:14,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331981082] [2020-10-27 01:58:14,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:15,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:15,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:15,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:15,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:16,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:16,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:16,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:16,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:16,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:16,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:16,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:16,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:16,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:16,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:16,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:16,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:16,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:17,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:17,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:19,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:19,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 292 [2020-10-27 01:58:19,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 01:58:19,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 01:58:19,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:19,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:58:19,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:19,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:58:19,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:20,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:20,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:20,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:20,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:20,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:20,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:20,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:20,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:20,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:20,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:20,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11093 backedges. 3106 proven. 287 refuted. 0 times theorem prover too weak. 7700 trivial. 0 not checked. [2020-10-27 01:58:20,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331981082] [2020-10-27 01:58:20,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:20,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:58:20,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333435583] [2020-10-27 01:58:20,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:58:20,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:20,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:58:20,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:58:20,804 INFO L87 Difference]: Start difference. First operand 623 states and 801 transitions. Second operand 19 states. [2020-10-27 01:58:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:24,086 INFO L93 Difference]: Finished difference Result 1212 states and 1568 transitions. [2020-10-27 01:58:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:58:24,086 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 284 [2020-10-27 01:58:24,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:24,092 INFO L225 Difference]: With dead ends: 1212 [2020-10-27 01:58:24,092 INFO L226 Difference]: Without dead ends: 696 [2020-10-27 01:58:24,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:58:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2020-10-27 01:58:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 665. [2020-10-27 01:58:24,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2020-10-27 01:58:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 855 transitions. [2020-10-27 01:58:24,215 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 855 transitions. Word has length 284 [2020-10-27 01:58:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:24,215 INFO L481 AbstractCegarLoop]: Abstraction has 665 states and 855 transitions. [2020-10-27 01:58:24,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:58:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 855 transitions. [2020-10-27 01:58:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-27 01:58:24,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:24,217 INFO L422 BasicCegarLoop]: trace histogram [91, 90, 90, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:24,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:58:24,217 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:24,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:24,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1161829018, now seen corresponding path program 16 times [2020-10-27 01:58:24,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:24,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686162901] [2020-10-27 01:58:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:24,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:25,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:25,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:25,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:25,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:25,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:26,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:28,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:28,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:29,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:29,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-27 01:58:29,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 01:58:29,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 01:58:29,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:29,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:58:29,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:29,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:58:29,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:30,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:30,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:30,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:30,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:30,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:30,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:30,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:30,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:30,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:30,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:30,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12692 backedges. 3552 proven. 330 refuted. 0 times theorem prover too weak. 8810 trivial. 0 not checked. [2020-10-27 01:58:30,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686162901] [2020-10-27 01:58:30,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:30,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:58:30,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091234286] [2020-10-27 01:58:30,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:58:30,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:30,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:58:30,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:58:30,500 INFO L87 Difference]: Start difference. First operand 665 states and 855 transitions. Second operand 20 states. [2020-10-27 01:58:34,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:34,215 INFO L93 Difference]: Finished difference Result 1289 states and 1667 transitions. [2020-10-27 01:58:34,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:58:34,216 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 302 [2020-10-27 01:58:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:34,220 INFO L225 Difference]: With dead ends: 1289 [2020-10-27 01:58:34,220 INFO L226 Difference]: Without dead ends: 738 [2020-10-27 01:58:34,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:58:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2020-10-27 01:58:34,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 707. [2020-10-27 01:58:34,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2020-10-27 01:58:34,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 909 transitions. [2020-10-27 01:58:34,365 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 909 transitions. Word has length 302 [2020-10-27 01:58:34,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:34,365 INFO L481 AbstractCegarLoop]: Abstraction has 707 states and 909 transitions. [2020-10-27 01:58:34,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:58:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 909 transitions. [2020-10-27 01:58:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-27 01:58:34,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:34,369 INFO L422 BasicCegarLoop]: trace histogram [97, 96, 96, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:34,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:58:34,369 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:34,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:34,370 INFO L82 PathProgramCache]: Analyzing trace with hash -775598886, now seen corresponding path program 17 times [2020-10-27 01:58:34,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:34,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255809688] [2020-10-27 01:58:34,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:34,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:35,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:35,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:36,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:36,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:36,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:36,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:36,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:37,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:39,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:39,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-27 01:58:39,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 01:58:39,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 01:58:39,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:39,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:58:39,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:39,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:58:39,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:40,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:40,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:40,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:40,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:40,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:40,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:58:40,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:40,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:40,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:40,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:40,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14399 backedges. 4028 proven. 376 refuted. 0 times theorem prover too weak. 9995 trivial. 0 not checked. [2020-10-27 01:58:40,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255809688] [2020-10-27 01:58:40,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:40,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:58:40,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595311229] [2020-10-27 01:58:40,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:58:40,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:40,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:58:40,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:58:40,590 INFO L87 Difference]: Start difference. First operand 707 states and 909 transitions. Second operand 21 states. [2020-10-27 01:58:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:45,532 INFO L93 Difference]: Finished difference Result 1366 states and 1766 transitions. [2020-10-27 01:58:45,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:58:45,533 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 320 [2020-10-27 01:58:45,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:45,538 INFO L225 Difference]: With dead ends: 1366 [2020-10-27 01:58:45,538 INFO L226 Difference]: Without dead ends: 780 [2020-10-27 01:58:45,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:58:45,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-10-27 01:58:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 749. [2020-10-27 01:58:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2020-10-27 01:58:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 963 transitions. [2020-10-27 01:58:45,681 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 963 transitions. Word has length 320 [2020-10-27 01:58:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:45,682 INFO L481 AbstractCegarLoop]: Abstraction has 749 states and 963 transitions. [2020-10-27 01:58:45,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:58:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 963 transitions. [2020-10-27 01:58:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-10-27 01:58:45,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:45,685 INFO L422 BasicCegarLoop]: trace histogram [103, 102, 102, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:45,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:58:45,685 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:45,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:45,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1135276902, now seen corresponding path program 18 times [2020-10-27 01:58:45,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:45,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511182476] [2020-10-27 01:58:45,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:46,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:46,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:47,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:47,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:47,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:47,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:48,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:49,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:50,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:51,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:51,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 346 [2020-10-27 01:58:51,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 01:58:51,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 01:58:51,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:51,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:58:51,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:58:51,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:58:51,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:52,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:58:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:52,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:52,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:58:52,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:58:52,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:58:52,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:58:52,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:58:52,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:58:52,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:58:52,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:58:52,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:58:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16214 backedges. 4534 proven. 425 refuted. 0 times theorem prover too weak. 11255 trivial. 0 not checked. [2020-10-27 01:58:52,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511182476] [2020-10-27 01:58:52,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:58:52,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:58:52,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610734011] [2020-10-27 01:58:52,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:58:52,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:58:52,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:58:52,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:58:52,314 INFO L87 Difference]: Start difference. First operand 749 states and 963 transitions. Second operand 22 states. [2020-10-27 01:58:57,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:58:57,227 INFO L93 Difference]: Finished difference Result 1443 states and 1865 transitions. [2020-10-27 01:58:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:58:57,231 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 338 [2020-10-27 01:58:57,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:58:57,235 INFO L225 Difference]: With dead ends: 1443 [2020-10-27 01:58:57,235 INFO L226 Difference]: Without dead ends: 822 [2020-10-27 01:58:57,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:58:57,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2020-10-27 01:58:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 791. [2020-10-27 01:58:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 791 states. [2020-10-27 01:58:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1017 transitions. [2020-10-27 01:58:57,379 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1017 transitions. Word has length 338 [2020-10-27 01:58:57,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:58:57,379 INFO L481 AbstractCegarLoop]: Abstraction has 791 states and 1017 transitions. [2020-10-27 01:58:57,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:58:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1017 transitions. [2020-10-27 01:58:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2020-10-27 01:58:57,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:58:57,383 INFO L422 BasicCegarLoop]: trace histogram [109, 108, 108, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:58:57,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:58:57,383 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:58:57,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:58:57,384 INFO L82 PathProgramCache]: Analyzing trace with hash 2004664026, now seen corresponding path program 19 times [2020-10-27 01:58:57,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:58:57,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536293174] [2020-10-27 01:58:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:58:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:58:58,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:58,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:58,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:59,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:59,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:58:59,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:00,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:01,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:02,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:02,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 364 [2020-10-27 01:59:02,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 01:59:02,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 01:59:02,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:02,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:59:02,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:02,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:59:02,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:03,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:03,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:03,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:03,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:03,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:03,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:03,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:03,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:03,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:03,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:03,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18137 backedges. 5070 proven. 477 refuted. 0 times theorem prover too weak. 12590 trivial. 0 not checked. [2020-10-27 01:59:03,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536293174] [2020-10-27 01:59:03,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:03,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:59:03,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865098817] [2020-10-27 01:59:03,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:59:03,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:03,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:59:03,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:59:03,838 INFO L87 Difference]: Start difference. First operand 791 states and 1017 transitions. Second operand 23 states. [2020-10-27 01:59:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:09,996 INFO L93 Difference]: Finished difference Result 1520 states and 1964 transitions. [2020-10-27 01:59:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:59:09,998 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 356 [2020-10-27 01:59:09,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:10,002 INFO L225 Difference]: With dead ends: 1520 [2020-10-27 01:59:10,002 INFO L226 Difference]: Without dead ends: 864 [2020-10-27 01:59:10,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=215, Invalid=1591, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:59:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2020-10-27 01:59:10,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 833. [2020-10-27 01:59:10,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 833 states. [2020-10-27 01:59:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1071 transitions. [2020-10-27 01:59:10,167 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1071 transitions. Word has length 356 [2020-10-27 01:59:10,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:10,168 INFO L481 AbstractCegarLoop]: Abstraction has 833 states and 1071 transitions. [2020-10-27 01:59:10,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:59:10,168 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1071 transitions. [2020-10-27 01:59:10,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-10-27 01:59:10,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:10,172 INFO L422 BasicCegarLoop]: trace histogram [115, 114, 114, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:10,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:59:10,172 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:10,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1933770394, now seen corresponding path program 20 times [2020-10-27 01:59:10,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:10,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643356500] [2020-10-27 01:59:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:10,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:11,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:11,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:12,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:13,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:14,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:14,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:15,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:15,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-27 01:59:15,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 01:59:15,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 01:59:15,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:15,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:59:15,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:15,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:59:15,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:16,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:16,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:16,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:16,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:16,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:16,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:16,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:16,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:16,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:16,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:16,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20168 backedges. 5636 proven. 532 refuted. 0 times theorem prover too weak. 14000 trivial. 0 not checked. [2020-10-27 01:59:16,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643356500] [2020-10-27 01:59:16,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:16,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:59:16,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171343954] [2020-10-27 01:59:16,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:59:16,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:16,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:59:16,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:59:16,985 INFO L87 Difference]: Start difference. First operand 833 states and 1071 transitions. Second operand 24 states. [2020-10-27 01:59:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:23,185 INFO L93 Difference]: Finished difference Result 1597 states and 2063 transitions. [2020-10-27 01:59:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:59:23,186 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 374 [2020-10-27 01:59:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:23,191 INFO L225 Difference]: With dead ends: 1597 [2020-10-27 01:59:23,192 INFO L226 Difference]: Without dead ends: 906 [2020-10-27 01:59:23,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=245, Invalid=1735, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:59:23,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-10-27 01:59:23,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 875. [2020-10-27 01:59:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 875 states. [2020-10-27 01:59:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1125 transitions. [2020-10-27 01:59:23,394 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1125 transitions. Word has length 374 [2020-10-27 01:59:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:23,394 INFO L481 AbstractCegarLoop]: Abstraction has 875 states and 1125 transitions. [2020-10-27 01:59:23,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:59:23,394 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1125 transitions. [2020-10-27 01:59:23,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-10-27 01:59:23,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:23,399 INFO L422 BasicCegarLoop]: trace histogram [121, 120, 120, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:23,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:59:23,399 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:23,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1022963930, now seen corresponding path program 21 times [2020-10-27 01:59:23,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:23,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175075357] [2020-10-27 01:59:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:24,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:24,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:25,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:25,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:26,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:26,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:26,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:26,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:26,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:27,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:28,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:28,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 400 [2020-10-27 01:59:28,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 01:59:28,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 01:59:28,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:59:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:28,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:59:28,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:29,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:29,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:29,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:29,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:29,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:29,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:29,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:29,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:29,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:29,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:29,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 22307 backedges. 6232 proven. 590 refuted. 0 times theorem prover too weak. 15485 trivial. 0 not checked. [2020-10-27 01:59:30,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175075357] [2020-10-27 01:59:30,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:30,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:59:30,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883162715] [2020-10-27 01:59:30,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:59:30,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:30,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:59:30,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:59:30,076 INFO L87 Difference]: Start difference. First operand 875 states and 1125 transitions. Second operand 25 states. [2020-10-27 01:59:37,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:37,607 INFO L93 Difference]: Finished difference Result 1674 states and 2162 transitions. [2020-10-27 01:59:37,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:59:37,608 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 392 [2020-10-27 01:59:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:37,613 INFO L225 Difference]: With dead ends: 1674 [2020-10-27 01:59:37,614 INFO L226 Difference]: Without dead ends: 948 [2020-10-27 01:59:37,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=237, Invalid=1925, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:59:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2020-10-27 01:59:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 917. [2020-10-27 01:59:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2020-10-27 01:59:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1179 transitions. [2020-10-27 01:59:37,771 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1179 transitions. Word has length 392 [2020-10-27 01:59:37,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:37,771 INFO L481 AbstractCegarLoop]: Abstraction has 917 states and 1179 transitions. [2020-10-27 01:59:37,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:59:37,772 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1179 transitions. [2020-10-27 01:59:37,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-10-27 01:59:37,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:37,776 INFO L422 BasicCegarLoop]: trace histogram [127, 126, 126, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:37,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:59:37,777 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:37,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1099559066, now seen corresponding path program 22 times [2020-10-27 01:59:37,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:37,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17689007] [2020-10-27 01:59:37,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:38,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:39,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:39,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:40,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:40,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:41,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:41,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:41,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:41,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:41,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:41,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:42,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:42,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:42,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:42,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:42,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:42,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:42,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:42,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:42,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:42,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:42,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:43,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:43,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:43,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 418 [2020-10-27 01:59:43,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-27 01:59:43,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 01:59:43,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:43,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:59:43,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:43,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 01:59:43,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:44,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:44,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:44,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:44,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:44,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:44,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:59:44,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:44,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:44,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:44,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:44,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 24554 backedges. 6858 proven. 651 refuted. 0 times theorem prover too weak. 17045 trivial. 0 not checked. [2020-10-27 01:59:44,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17689007] [2020-10-27 01:59:44,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:44,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:59:44,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964110937] [2020-10-27 01:59:44,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:59:44,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:44,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:59:44,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:59:44,560 INFO L87 Difference]: Start difference. First operand 917 states and 1179 transitions. Second operand 26 states. [2020-10-27 01:59:51,809 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-27 01:59:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:52,510 INFO L93 Difference]: Finished difference Result 1751 states and 2261 transitions. [2020-10-27 01:59:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:59:52,511 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 410 [2020-10-27 01:59:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:52,515 INFO L225 Difference]: With dead ends: 1751 [2020-10-27 01:59:52,515 INFO L226 Difference]: Without dead ends: 990 [2020-10-27 01:59:52,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=248, Invalid=2104, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:59:52,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2020-10-27 01:59:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 959. [2020-10-27 01:59:52,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-10-27 01:59:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1233 transitions. [2020-10-27 01:59:52,697 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1233 transitions. Word has length 410 [2020-10-27 01:59:52,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:52,697 INFO L481 AbstractCegarLoop]: Abstraction has 959 states and 1233 transitions. [2020-10-27 01:59:52,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:59:52,697 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1233 transitions. [2020-10-27 01:59:52,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-10-27 01:59:52,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:52,700 INFO L422 BasicCegarLoop]: trace histogram [133, 132, 132, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:52,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:59:52,701 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:52,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2008720090, now seen corresponding path program 23 times [2020-10-27 01:59:52,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:52,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009560681] [2020-10-27 01:59:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:53,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:54,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:54,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:55,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:55,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:56,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:56,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:56,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:56,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:57,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:57,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:57,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:57,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:57,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:57,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:57,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:57,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:57,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:57,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:57,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:57,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:57,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:58,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:58,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 436 [2020-10-27 01:59:58,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 01:59:58,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 01:59:58,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:58,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:59:58,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:59:58,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:59:58,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:59:58,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:58,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:58,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:58,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:58,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:58,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:59:58,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:58,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:58,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:58,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:58,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 26909 backedges. 276 proven. 0 refuted. 0 times theorem prover too weak. 26633 trivial. 0 not checked. [2020-10-27 01:59:58,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009560681] [2020-10-27 01:59:58,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:59:58,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:59:58,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338412925] [2020-10-27 01:59:58,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:59:58,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:58,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:59:58,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:59:58,339 INFO L87 Difference]: Start difference. First operand 959 states and 1233 transitions. Second operand 4 states. [2020-10-27 01:59:58,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:58,762 INFO L93 Difference]: Finished difference Result 2570 states and 3383 transitions. [2020-10-27 01:59:58,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:59:58,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 428 [2020-10-27 01:59:58,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:58,772 INFO L225 Difference]: With dead ends: 2570 [2020-10-27 01:59:58,773 INFO L226 Difference]: Without dead ends: 1625 [2020-10-27 01:59:58,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:59:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2020-10-27 01:59:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1092. [2020-10-27 01:59:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1092 states. [2020-10-27 01:59:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1366 transitions. [2020-10-27 01:59:59,018 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1366 transitions. Word has length 428 [2020-10-27 01:59:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:59,018 INFO L481 AbstractCegarLoop]: Abstraction has 1092 states and 1366 transitions. [2020-10-27 01:59:59,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:59:59,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1366 transitions. [2020-10-27 01:59:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 825 [2020-10-27 01:59:59,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:59,028 INFO L422 BasicCegarLoop]: trace histogram [133, 133, 132, 132, 132, 132, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:59,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:59:59,028 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:59,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:59,029 INFO L82 PathProgramCache]: Analyzing trace with hash 325609498, now seen corresponding path program 1 times [2020-10-27 01:59:59,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:59,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692197052] [2020-10-27 01:59:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:01,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking...