/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/loops-crafted-1/Mono4_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:09:18,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:09:18,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:09:18,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:09:18,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:09:18,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:09:18,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:09:18,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:09:18,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:09:18,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:09:18,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:09:18,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:09:18,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:09:18,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:09:18,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:09:18,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:09:18,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:09:18,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:09:18,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:09:18,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:09:18,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:09:18,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:09:18,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:09:18,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:09:18,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:09:18,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:09:18,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:09:18,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:09:18,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:09:18,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:09:18,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:09:18,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:09:18,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:09:18,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:09:18,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:09:18,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:09:18,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:09:18,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:09:18,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:09:18,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:09:18,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:09:18,369 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 [2020-10-28 15:09:18,417 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:09:18,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:09:18,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:09:18,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:09:18,423 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:09:18,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:09:18,423 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:09:18,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:09:18,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:09:18,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:09:18,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:09:18,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:09:18,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:09:18,426 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:09:18,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:09:18,426 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:09:18,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:09:18,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:09:18,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:09:18,427 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:09:18,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:09:18,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:09:18,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:09:18,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:09:18,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:09:18,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:09:18,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:09:18,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:09:18,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:09:18,429 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:09:18,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:09:18,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:09:18,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:09:18,918 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:09:18,919 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:09:18,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2020-10-28 15:09:19,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1967633f8/671449b1548f4099811bef571b8e3032/FLAG4666d4230 [2020-10-28 15:09:19,575 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:09:19,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2020-10-28 15:09:19,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1967633f8/671449b1548f4099811bef571b8e3032/FLAG4666d4230 [2020-10-28 15:09:19,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1967633f8/671449b1548f4099811bef571b8e3032 [2020-10-28 15:09:19,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:09:19,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:09:19,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:09:19,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:09:19,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:09:19,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:09:19" (1/1) ... [2020-10-28 15:09:19,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19b15775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:19, skipping insertion in model container [2020-10-28 15:09:19,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:09:19" (1/1) ... [2020-10-28 15:09:19,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:09:20,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:09:20,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:09:20,240 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:09:20,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:09:20,273 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:09:20,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:20 WrapperNode [2020-10-28 15:09:20,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:09:20,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:09:20,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:09:20,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:09:20,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:20" (1/1) ... [2020-10-28 15:09:20,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:20" (1/1) ... [2020-10-28 15:09:20,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:20" (1/1) ... [2020-10-28 15:09:20,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:20" (1/1) ... [2020-10-28 15:09:20,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:20" (1/1) ... [2020-10-28 15:09:20,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:20" (1/1) ... [2020-10-28 15:09:20,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:20" (1/1) ... [2020-10-28 15:09:20,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:09:20,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:09:20,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:09:20,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:09:20,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:20" (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 [2020-10-28 15:09:20,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:09:20,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:09:20,404 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:09:20,405 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:09:20,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:09:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:09:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:09:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:09:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:09:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:09:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:09:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:09:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:09:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:09:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:09:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:09:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:09:20,818 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:09:20,818 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 15:09:20,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:09:20 BoogieIcfgContainer [2020-10-28 15:09:20,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:09:20,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:09:20,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:09:20,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:09:20,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:09:19" (1/3) ... [2020-10-28 15:09:20,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602f45e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:09:20, skipping insertion in model container [2020-10-28 15:09:20,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:09:20" (2/3) ... [2020-10-28 15:09:20,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602f45e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:09:20, skipping insertion in model container [2020-10-28 15:09:20,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:09:20" (3/3) ... [2020-10-28 15:09:20,831 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2020-10-28 15:09:20,843 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:09:20,847 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:09:20,890 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:09:20,943 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:09:20,944 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:09:20,944 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:09:20,944 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:09:20,944 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:09:20,944 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:09:20,944 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:09:20,944 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:09:20,967 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-28 15:09:20,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:09:20,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:20,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:20,977 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:20,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1413113606, now seen corresponding path program 1 times [2020-10-28 15:09:20,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:20,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276702331] [2020-10-28 15:09:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:21,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:21,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:21,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:21,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:09:21,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:21,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-28 15:09:21,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:21,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:09:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:21,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:09:21,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:21,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:21,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:21,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:21,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:21,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 15:09:21,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:21,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:21,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:21,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:21,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:21,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:09:21,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276702331] [2020-10-28 15:09:21,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:09:21,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:09:21,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343184407] [2020-10-28 15:09:21,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:09:21,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:21,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:09:21,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:09:21,757 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-28 15:09:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:21,820 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-28 15:09:21,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:09:21,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 15:09:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:21,829 INFO L225 Difference]: With dead ends: 37 [2020-10-28 15:09:21,829 INFO L226 Difference]: Without dead ends: 14 [2020-10-28 15:09:21,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:09:21,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-28 15:09:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-28 15:09:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-28 15:09:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-28 15:09:21,872 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-10-28 15:09:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:21,872 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-28 15:09:21,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:09:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-28 15:09:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:09:21,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:21,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:21,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:09:21,874 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:21,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1126822096, now seen corresponding path program 1 times [2020-10-28 15:09:21,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:21,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413171600] [2020-10-28 15:09:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:21,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:21,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:22,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:22,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:09:22,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:22,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-28 15:09:22,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:22,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:22,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:09:22,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:22,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:09:22,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:09:22,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:22,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:22,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:22,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:22,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:22,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:09:22,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:22,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:22,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:22,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:09:22,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413171600] [2020-10-28 15:09:22,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:09:22,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:09:22,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140234468] [2020-10-28 15:09:22,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:09:22,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:22,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:09:22,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:09:22,115 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-28 15:09:22,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:22,199 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-28 15:09:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:09:22,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 15:09:22,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:22,200 INFO L225 Difference]: With dead ends: 24 [2020-10-28 15:09:22,200 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 15:09:22,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:09:22,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 15:09:22,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-28 15:09:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 15:09:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-28 15:09:22,210 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-28 15:09:22,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:22,211 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-28 15:09:22,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:09:22,211 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-28 15:09:22,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 15:09:22,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:22,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:22,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:09:22,213 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1396654797, now seen corresponding path program 1 times [2020-10-28 15:09:22,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:22,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970414212] [2020-10-28 15:09:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:22,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:22,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:22,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:22,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:22,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 15:09:22,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:22,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-28 15:09:22,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:22,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:22,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:09:22,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:09:22,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:09:22,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:22,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:22,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:22,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:22,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:22,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:22,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:09:22,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:22,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:22,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:22,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:22,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:22,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:09:22,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970414212] [2020-10-28 15:09:22,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:09:22,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:09:22,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604812792] [2020-10-28 15:09:22,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:09:22,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:22,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:09:22,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:09:22,547 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-28 15:09:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:22,623 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-28 15:09:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:09:22,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-28 15:09:22,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:22,624 INFO L225 Difference]: With dead ends: 24 [2020-10-28 15:09:22,624 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 15:09:22,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:09:22,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 15:09:22,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-28 15:09:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 15:09:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-28 15:09:22,632 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-28 15:09:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:22,633 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-28 15:09:22,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:09:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-28 15:09:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:09:22,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:22,634 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:22,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:09:22,634 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:22,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:22,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1973580632, now seen corresponding path program 1 times [2020-10-28 15:09:22,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:22,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70168227] [2020-10-28 15:09:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:22,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:22,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:22,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:22,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:22,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:09:22,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:22,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-28 15:09:22,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:22,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:22,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:09:22,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:22,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:09:22,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:22,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:22,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:22,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:22,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:22,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:22,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:09:22,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:22,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:22,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:22,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:22,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:09:22,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70168227] [2020-10-28 15:09:22,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:22,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:09:22,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094059210] [2020-10-28 15:09:22,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:09:22,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:22,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:09:22,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:09:22,892 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-28 15:09:23,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:23,034 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-28 15:09:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:09:23,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-28 15:09:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:23,036 INFO L225 Difference]: With dead ends: 28 [2020-10-28 15:09:23,036 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:09:23,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:09:23,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:09:23,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 15:09:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:09:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-28 15:09:23,044 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-28 15:09:23,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:23,044 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-28 15:09:23,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:09:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-28 15:09:23,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:09:23,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:23,046 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:23,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:09:23,046 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:23,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:23,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1684428347, now seen corresponding path program 2 times [2020-10-28 15:09:23,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:23,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208993462] [2020-10-28 15:09:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:23,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:23,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:23,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:23,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:23,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:09:23,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:23,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-28 15:09:23,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:23,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:23,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:09:23,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:23,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:09:23,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:23,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:23,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:23,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:23,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:23,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:23,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:09:23,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:23,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:23,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:23,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:23,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:23,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:09:23,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208993462] [2020-10-28 15:09:23,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:23,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:09:23,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073339965] [2020-10-28 15:09:23,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:09:23,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:23,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:09:23,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:09:23,341 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-28 15:09:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:23,484 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-28 15:09:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:09:23,484 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 15:09:23,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:23,485 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:09:23,485 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:09:23,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:09:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:09:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 15:09:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 15:09:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-28 15:09:23,492 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-28 15:09:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:23,493 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-28 15:09:23,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:09:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-28 15:09:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:09:23,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:23,494 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:23,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:09:23,494 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:23,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:23,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1313010594, now seen corresponding path program 3 times [2020-10-28 15:09:23,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:23,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069446095] [2020-10-28 15:09:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:23,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:23,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:23,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:23,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:23,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:09:23,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:23,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-28 15:09:23,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:23,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:23,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:09:23,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:09:23,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:09:23,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:23,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:23,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:23,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:23,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:23,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:23,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:09:23,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:23,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:23,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:23,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:23,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:23,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:09:23,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069446095] [2020-10-28 15:09:23,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:23,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:09:23,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410180521] [2020-10-28 15:09:23,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:09:23,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:23,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:09:23,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:09:23,792 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-28 15:09:23,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:23,898 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-28 15:09:23,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:09:23,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-28 15:09:23,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:23,901 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:09:23,901 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 15:09:23,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:09:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 15:09:23,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-28 15:09:23,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 15:09:23,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-28 15:09:23,908 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-28 15:09:23,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:23,909 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-28 15:09:23,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:09:23,909 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-28 15:09:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:09:23,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:23,910 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:23,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:09:23,910 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:23,911 INFO L82 PathProgramCache]: Analyzing trace with hash 751281091, now seen corresponding path program 4 times [2020-10-28 15:09:23,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:23,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004166760] [2020-10-28 15:09:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:23,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:23,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:23,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:24,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:24,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:09:24,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:24,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-28 15:09:24,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:24,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:24,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:09:24,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:24,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:09:24,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:24,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:24,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:24,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:24,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:24,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:24,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:24,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:24,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:24,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:24,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:24,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:24,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:09:24,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004166760] [2020-10-28 15:09:24,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:24,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:09:24,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181766230] [2020-10-28 15:09:24,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:09:24,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:24,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:09:24,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:09:24,260 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2020-10-28 15:09:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:24,434 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-28 15:09:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:09:24,434 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-28 15:09:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:24,435 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:09:24,435 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 15:09:24,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:09:24,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 15:09:24,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 15:09:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 15:09:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-28 15:09:24,442 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-10-28 15:09:24,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:24,442 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-28 15:09:24,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:09:24,442 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-28 15:09:24,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:09:24,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:24,443 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:24,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:09:24,444 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:24,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:24,444 INFO L82 PathProgramCache]: Analyzing trace with hash -440364954, now seen corresponding path program 5 times [2020-10-28 15:09:24,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:24,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396827811] [2020-10-28 15:09:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:24,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:24,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:24,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:24,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:24,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:09:24,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:24,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-28 15:09:24,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:24,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:24,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:09:24,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:24,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:09:24,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:09:24,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:24,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:24,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:24,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:24,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:24,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:09:24,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:24,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:24,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:24,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:24,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:24,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:09:24,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396827811] [2020-10-28 15:09:24,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:24,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:09:24,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32601481] [2020-10-28 15:09:24,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:09:24,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:24,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:09:24,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:09:24,916 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2020-10-28 15:09:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:25,168 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-28 15:09:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:09:25,169 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-28 15:09:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:25,170 INFO L225 Difference]: With dead ends: 38 [2020-10-28 15:09:25,170 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:09:25,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:09:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:09:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 15:09:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 15:09:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-28 15:09:25,181 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-10-28 15:09:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:25,181 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-28 15:09:25,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:09:25,182 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-28 15:09:25,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:09:25,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:25,183 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:25,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:09:25,183 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:25,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:25,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1144053833, now seen corresponding path program 6 times [2020-10-28 15:09:25,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:25,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720002920] [2020-10-28 15:09:25,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:25,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:25,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:25,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:25,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:25,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:09:25,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:25,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-28 15:09:25,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:25,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:25,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:09:25,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 15:09:25,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:09:25,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:25,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:25,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:25,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:25,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:25,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:25,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:09:25,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:25,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:25,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:25,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:25,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:25,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:09:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 15:09:25,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720002920] [2020-10-28 15:09:25,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:25,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:09:25,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802032678] [2020-10-28 15:09:25,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:09:25,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:25,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:09:25,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:09:25,696 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 6 states. [2020-10-28 15:09:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:25,858 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-28 15:09:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:09:25,859 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-28 15:09:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:25,860 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:09:25,860 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 15:09:25,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:09:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 15:09:25,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-28 15:09:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 15:09:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 15:09:25,872 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 26 [2020-10-28 15:09:25,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:25,872 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 15:09:25,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:09:25,872 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 15:09:25,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:09:25,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:25,875 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:25,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:09:25,875 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:25,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:25,876 INFO L82 PathProgramCache]: Analyzing trace with hash -241817362, now seen corresponding path program 7 times [2020-10-28 15:09:25,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:25,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940621049] [2020-10-28 15:09:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:25,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:25,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:25,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:26,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:26,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:09:26,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:26,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 591 [2020-10-28 15:09:26,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:26,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:09:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:09:26,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:09:26,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:26,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:26,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:26,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:26,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:26,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:26,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:26,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:26,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:26,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:26,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:26,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 15:09:26,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940621049] [2020-10-28 15:09:26,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:26,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:09:26,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589044158] [2020-10-28 15:09:26,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:09:26,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:26,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:09:26,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:09:26,593 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-10-28 15:09:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:26,888 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-10-28 15:09:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:09:26,889 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-28 15:09:26,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:26,890 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:09:26,890 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 15:09:26,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:09:26,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 15:09:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-10-28 15:09:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 15:09:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-28 15:09:26,898 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2020-10-28 15:09:26,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:26,898 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-28 15:09:26,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:09:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-28 15:09:26,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:09:26,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:26,899 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:26,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:09:26,900 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:26,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:26,900 INFO L82 PathProgramCache]: Analyzing trace with hash -624173997, now seen corresponding path program 8 times [2020-10-28 15:09:26,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:26,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807552374] [2020-10-28 15:09:26,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:26,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:26,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:26,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:27,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:27,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:09:27,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:27,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 825 [2020-10-28 15:09:27,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:27,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:27,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:09:27,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:27,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 15:09:27,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:27,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:27,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:27,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:27,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:27,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:27,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:27,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:27,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:27,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:27,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:27,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:27,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 15:09:27,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807552374] [2020-10-28 15:09:27,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:27,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:09:27,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315106361] [2020-10-28 15:09:27,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:09:27,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:27,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:09:27,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:09:27,848 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 11 states. [2020-10-28 15:09:28,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:28,222 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-10-28 15:09:28,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:09:28,222 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-28 15:09:28,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:28,223 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:09:28,223 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 15:09:28,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:09:28,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 15:09:28,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2020-10-28 15:09:28,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:09:28,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-28 15:09:28,232 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 30 [2020-10-28 15:09:28,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:28,233 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-28 15:09:28,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:09:28,233 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-28 15:09:28,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:09:28,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:28,234 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:28,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:09:28,234 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:28,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:28,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1298287224, now seen corresponding path program 9 times [2020-10-28 15:09:28,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:28,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840671406] [2020-10-28 15:09:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:28,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:28,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:28,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:28,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:28,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:09:28,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:28,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-28 15:09:28,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:28,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:09:28,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:28,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:09:28,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:29,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:29,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:29,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:29,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:29,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:29,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:29,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:29,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:29,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:29,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:29,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:29,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 15:09:29,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840671406] [2020-10-28 15:09:29,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:29,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:09:29,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505796796] [2020-10-28 15:09:29,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:09:29,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:29,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:09:29,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:09:29,019 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 12 states. [2020-10-28 15:09:29,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:29,528 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2020-10-28 15:09:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:09:29,529 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-28 15:09:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:29,530 INFO L225 Difference]: With dead ends: 58 [2020-10-28 15:09:29,530 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 15:09:29,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:09:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 15:09:29,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2020-10-28 15:09:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 15:09:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-28 15:09:29,539 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 32 [2020-10-28 15:09:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:29,540 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-28 15:09:29,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:09:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-28 15:09:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:09:29,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:29,541 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:29,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:09:29,541 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:29,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:29,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1947583325, now seen corresponding path program 10 times [2020-10-28 15:09:29,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:29,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374369503] [2020-10-28 15:09:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:29,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:29,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:29,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:30,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:30,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:09:30,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:30,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 969 [2020-10-28 15:09:30,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:30,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:30,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:09:30,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:30,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 15:09:30,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:30,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:30,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:30,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:30,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:30,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:30,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:30,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:30,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:30,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 15:09:30,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374369503] [2020-10-28 15:09:30,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:30,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:09:30,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917982724] [2020-10-28 15:09:30,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:09:30,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:30,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:09:30,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:09:30,689 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 13 states. [2020-10-28 15:09:31,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:31,217 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2020-10-28 15:09:31,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:09:31,218 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-28 15:09:31,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:31,219 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:09:31,219 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 15:09:31,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:09:31,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 15:09:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-28 15:09:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:09:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-10-28 15:09:31,229 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 34 [2020-10-28 15:09:31,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:31,229 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-10-28 15:09:31,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:09:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-10-28 15:09:31,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:09:31,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:31,231 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:31,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:09:31,231 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:31,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:31,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1144088830, now seen corresponding path program 11 times [2020-10-28 15:09:31,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:31,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913724411] [2020-10-28 15:09:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:31,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:31,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:31,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:32,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:32,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:09:32,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:32,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1229 [2020-10-28 15:09:32,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:32,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:32,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:09:32,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 15:09:32,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:09:32,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:32,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:32,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:32,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:32,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:32,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:32,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:32,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:32,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:32,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 75 proven. 49 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 15:09:32,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913724411] [2020-10-28 15:09:32,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:32,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:09:32,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568254082] [2020-10-28 15:09:32,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:09:32,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:32,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:09:32,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:09:32,590 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 11 states. [2020-10-28 15:09:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:33,017 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2020-10-28 15:09:33,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:09:33,018 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-28 15:09:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:33,019 INFO L225 Difference]: With dead ends: 86 [2020-10-28 15:09:33,019 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 15:09:33,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:09:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 15:09:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 39. [2020-10-28 15:09:33,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 15:09:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-28 15:09:33,032 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 36 [2020-10-28 15:09:33,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:33,032 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-28 15:09:33,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:09:33,033 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-28 15:09:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 15:09:33,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:33,033 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:33,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:09:33,034 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:33,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:33,034 INFO L82 PathProgramCache]: Analyzing trace with hash -123660953, now seen corresponding path program 12 times [2020-10-28 15:09:33,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:33,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511823110] [2020-10-28 15:09:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:33,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:33,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:33,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:34,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:34,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 15:09:34,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:34,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1451 [2020-10-28 15:09:34,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:34,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:09:34,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 15:09:34,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:09:34,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:34,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:34,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:34,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:34,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:34,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:34,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 15:09:34,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:34,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:34,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:34,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 85 proven. 64 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 15:09:34,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511823110] [2020-10-28 15:09:34,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:34,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:09:34,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392924975] [2020-10-28 15:09:34,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:09:34,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:34,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:09:34,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:09:34,649 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 12 states. [2020-10-28 15:09:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:35,069 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-10-28 15:09:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:09:35,069 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-28 15:09:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:35,070 INFO L225 Difference]: With dead ends: 48 [2020-10-28 15:09:35,070 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 15:09:35,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:09:35,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 15:09:35,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-28 15:09:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 15:09:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-10-28 15:09:35,094 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 38 [2020-10-28 15:09:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:35,094 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-10-28 15:09:35,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:09:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-10-28 15:09:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 15:09:35,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:35,097 INFO L422 BasicCegarLoop]: trace histogram [14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:35,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:09:35,098 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:35,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:35,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1254985356, now seen corresponding path program 13 times [2020-10-28 15:09:35,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:35,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242342495] [2020-10-28 15:09:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:35,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:35,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:35,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:36,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:36,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 15:09:36,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:36,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-28 15:09:36,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:36,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:36,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:09:36,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 15:09:36,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:09:36,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:36,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:36,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:36,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:36,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:36,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:36,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:36,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:36,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:36,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:36,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:36,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:36,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 95 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 15:09:36,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242342495] [2020-10-28 15:09:36,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:36,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:09:36,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657256287] [2020-10-28 15:09:36,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:09:36,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:36,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:09:36,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:09:36,280 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 13 states. [2020-10-28 15:09:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:36,769 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-10-28 15:09:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:09:36,769 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-28 15:09:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:36,770 INFO L225 Difference]: With dead ends: 50 [2020-10-28 15:09:36,770 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 15:09:36,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:09:36,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 15:09:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-28 15:09:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 15:09:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-28 15:09:36,783 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 40 [2020-10-28 15:09:36,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:36,783 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-28 15:09:36,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:09:36,783 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-28 15:09:36,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 15:09:36,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:36,784 INFO L422 BasicCegarLoop]: trace histogram [15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:36,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:09:36,785 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:36,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1010806159, now seen corresponding path program 14 times [2020-10-28 15:09:36,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:36,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561783309] [2020-10-28 15:09:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:36,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:36,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:37,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:37,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:37,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 15:09:37,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:37,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 997 [2020-10-28 15:09:37,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:37,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:37,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:09:37,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:37,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:09:37,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:37,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:37,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:37,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:37,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:37,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:37,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:37,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:37,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:37,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:37,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:37,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:37,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 114 proven. 30 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 15:09:37,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561783309] [2020-10-28 15:09:37,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:37,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:09:37,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724927052] [2020-10-28 15:09:37,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:09:37,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:37,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:09:37,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:09:37,899 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 9 states. [2020-10-28 15:09:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:38,166 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2020-10-28 15:09:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:09:38,166 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-28 15:09:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:38,167 INFO L225 Difference]: With dead ends: 72 [2020-10-28 15:09:38,167 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 15:09:38,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:09:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 15:09:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 15:09:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:09:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-28 15:09:38,181 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 42 [2020-10-28 15:09:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:38,181 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-28 15:09:38,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:09:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-28 15:09:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 15:09:38,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:38,182 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:38,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:09:38,182 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:38,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:38,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1483706260, now seen corresponding path program 15 times [2020-10-28 15:09:38,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:38,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413119492] [2020-10-28 15:09:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:38,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:38,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:38,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:39,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:39,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 15:09:39,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:39,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1255 [2020-10-28 15:09:39,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:39,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:39,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:09:39,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 15:09:39,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:09:39,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:39,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:39,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:39,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:39,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:39,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:39,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:09:39,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:39,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:39,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:39,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:39,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:39,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 126 proven. 100 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 15:09:39,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413119492] [2020-10-28 15:09:39,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:39,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:09:39,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976118316] [2020-10-28 15:09:39,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:09:39,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:39,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:09:39,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:09:39,624 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 14 states. [2020-10-28 15:09:40,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:40,298 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-10-28 15:09:40,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:09:40,298 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-28 15:09:40,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:40,299 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:09:40,299 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 15:09:40,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:09:40,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 15:09:40,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-28 15:09:40,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 15:09:40,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2020-10-28 15:09:40,312 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 44 [2020-10-28 15:09:40,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:40,312 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2020-10-28 15:09:40,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:09:40,312 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2020-10-28 15:09:40,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 15:09:40,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:40,313 INFO L422 BasicCegarLoop]: trace histogram [17, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:40,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:09:40,313 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:40,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:40,314 INFO L82 PathProgramCache]: Analyzing trace with hash -253349511, now seen corresponding path program 16 times [2020-10-28 15:09:40,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:40,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601125417] [2020-10-28 15:09:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:40,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:40,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:40,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:41,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:41,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 15:09:41,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:41,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1331 [2020-10-28 15:09:41,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:41,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:41,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:09:41,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:41,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:09:41,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:41,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:41,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:41,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:41,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:41,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:41,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:41,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:41,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:41,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:41,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:41,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:41,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 147 proven. 42 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 15:09:41,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601125417] [2020-10-28 15:09:41,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:41,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:09:41,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813785526] [2020-10-28 15:09:41,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:09:41,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:41,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:09:41,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:09:41,761 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 10 states. [2020-10-28 15:09:42,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:42,060 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2020-10-28 15:09:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:09:42,061 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-28 15:09:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:42,062 INFO L225 Difference]: With dead ends: 78 [2020-10-28 15:09:42,062 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 15:09:42,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:09:42,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 15:09:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-28 15:09:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:09:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-10-28 15:09:42,074 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 46 [2020-10-28 15:09:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:42,074 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-10-28 15:09:42,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:09:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-10-28 15:09:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 15:09:42,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:42,075 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:42,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:09:42,075 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:42,076 INFO L82 PathProgramCache]: Analyzing trace with hash -207870692, now seen corresponding path program 17 times [2020-10-28 15:09:42,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:42,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394140485] [2020-10-28 15:09:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:42,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:42,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:42,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:43,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:43,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 15:09:43,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:43,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1351 [2020-10-28 15:09:43,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:43,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:43,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:09:43,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 15:09:43,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 15:09:43,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:43,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:43,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:43,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:43,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:43,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:43,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:43,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:43,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:43,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:43,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:43,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:43,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 161 proven. 121 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-28 15:09:43,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394140485] [2020-10-28 15:09:43,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:43,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:09:43,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788578223] [2020-10-28 15:09:43,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:09:43,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:43,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:09:43,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:09:43,642 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 15 states. [2020-10-28 15:09:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:44,271 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2020-10-28 15:09:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:09:44,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-28 15:09:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:44,273 INFO L225 Difference]: With dead ends: 58 [2020-10-28 15:09:44,273 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 15:09:44,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:09:44,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 15:09:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-28 15:09:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 15:09:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-10-28 15:09:44,287 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 48 [2020-10-28 15:09:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:44,287 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-10-28 15:09:44,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:09:44,287 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-10-28 15:09:44,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 15:09:44,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:44,288 INFO L422 BasicCegarLoop]: trace histogram [19, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:44,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:09:44,288 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:44,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:44,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1933804801, now seen corresponding path program 18 times [2020-10-28 15:09:44,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:44,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724908115] [2020-10-28 15:09:44,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:44,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:44,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:45,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:45,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:45,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 15:09:45,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:45,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1458 [2020-10-28 15:09:45,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:45,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:45,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:09:45,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 15:09:45,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 15:09:45,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:45,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:45,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:45,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:45,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:45,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:45,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:45,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:45,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:45,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:46,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 175 proven. 144 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-28 15:09:46,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724908115] [2020-10-28 15:09:46,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:46,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:09:46,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947753648] [2020-10-28 15:09:46,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:09:46,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:46,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:09:46,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:09:46,011 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 16 states. [2020-10-28 15:09:46,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:46,689 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-10-28 15:09:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:09:46,690 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-28 15:09:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:46,691 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:09:46,691 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 15:09:46,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:09:46,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 15:09:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-28 15:09:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 15:09:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2020-10-28 15:09:46,716 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 50 [2020-10-28 15:09:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:46,716 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2020-10-28 15:09:46,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:09:46,716 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2020-10-28 15:09:46,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 15:09:46,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:46,717 INFO L422 BasicCegarLoop]: trace histogram [20, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:46,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:09:46,717 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:46,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:46,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1500348506, now seen corresponding path program 19 times [2020-10-28 15:09:46,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:46,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442218989] [2020-10-28 15:09:46,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:46,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:46,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:47,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:48,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:48,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 15:09:48,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:48,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1390 [2020-10-28 15:09:48,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:48,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:09:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:09:48,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:48,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:48,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:48,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:48,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:48,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:48,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:48,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:48,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:48,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:48,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:09:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 200 proven. 56 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 15:09:48,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442218989] [2020-10-28 15:09:48,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:48,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:09:48,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596591317] [2020-10-28 15:09:48,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:09:48,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:48,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:09:48,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:09:48,260 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand 11 states. [2020-10-28 15:09:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:48,693 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2020-10-28 15:09:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:09:48,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-28 15:09:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:48,696 INFO L225 Difference]: With dead ends: 88 [2020-10-28 15:09:48,696 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 15:09:48,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:09:48,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 15:09:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 15:09:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 15:09:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2020-10-28 15:09:48,711 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 52 [2020-10-28 15:09:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:48,712 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2020-10-28 15:09:48,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:09:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2020-10-28 15:09:48,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 15:09:48,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:48,713 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:48,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:09:48,713 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:48,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:48,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1180560649, now seen corresponding path program 20 times [2020-10-28 15:09:48,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:48,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962318062] [2020-10-28 15:09:48,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:48,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:48,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:49,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:50,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:50,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 15:09:50,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:50,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1900 [2020-10-28 15:09:50,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:50,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:50,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:09:50,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 15:09:50,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:09:50,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:50,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:50,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:50,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:50,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:50,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:50,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:09:50,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:50,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:50,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:50,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:50,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:50,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:09:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 216 proven. 169 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 15:09:50,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962318062] [2020-10-28 15:09:50,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:50,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:09:50,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823609186] [2020-10-28 15:09:50,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:09:50,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:50,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:09:50,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:09:50,856 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 17 states. [2020-10-28 15:09:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:51,633 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2020-10-28 15:09:51,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:09:51,634 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-28 15:09:51,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:51,635 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:09:51,635 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 15:09:51,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:09:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 15:09:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-28 15:09:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 15:09:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-10-28 15:09:51,661 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 54 [2020-10-28 15:09:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:51,661 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-10-28 15:09:51,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:09:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-10-28 15:09:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 15:09:51,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:51,662 INFO L422 BasicCegarLoop]: trace histogram [22, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:51,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:09:51,662 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:51,664 INFO L82 PathProgramCache]: Analyzing trace with hash 481494446, now seen corresponding path program 21 times [2020-10-28 15:09:51,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:51,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665601339] [2020-10-28 15:09:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:51,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:51,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:52,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:53,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:53,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 15:09:53,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:53,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1440 [2020-10-28 15:09:53,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:53,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:53,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:09:53,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 15:09:53,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 15:09:53,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:53,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:53,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:53,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:53,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:53,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:53,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:09:53,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:53,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:53,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:53,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:53,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:53,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 232 proven. 196 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 15:09:53,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665601339] [2020-10-28 15:09:53,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:53,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:09:53,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671379464] [2020-10-28 15:09:53,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:09:53,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:53,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:09:53,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:09:53,367 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 18 states. [2020-10-28 15:09:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:54,151 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2020-10-28 15:09:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:09:54,151 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2020-10-28 15:09:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:54,152 INFO L225 Difference]: With dead ends: 66 [2020-10-28 15:09:54,152 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 15:09:54,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:09:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 15:09:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-28 15:09:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 15:09:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2020-10-28 15:09:54,166 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 56 [2020-10-28 15:09:54,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:54,166 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2020-10-28 15:09:54,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:09:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2020-10-28 15:09:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 15:09:54,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:54,171 INFO L422 BasicCegarLoop]: trace histogram [23, 15, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:54,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:09:54,173 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:54,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:54,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1306228461, now seen corresponding path program 22 times [2020-10-28 15:09:54,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:54,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142478895] [2020-10-28 15:09:54,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:54,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:54,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:54,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:55,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:55,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 15:09:55,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:55,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1677 [2020-10-28 15:09:55,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:55,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:55,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:09:55,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:09:55,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:09:55,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:55,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:55,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:55,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:55,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:55,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:55,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:55,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:55,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:55,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:55,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:55,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:55,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 261 proven. 72 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-28 15:09:55,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142478895] [2020-10-28 15:09:55,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:55,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:09:55,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139198491] [2020-10-28 15:09:55,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:09:55,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:56,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:09:56,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:09:56,000 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand 12 states. [2020-10-28 15:09:56,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:56,426 INFO L93 Difference]: Finished difference Result 98 states and 129 transitions. [2020-10-28 15:09:56,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:09:56,426 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-10-28 15:09:56,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:56,427 INFO L225 Difference]: With dead ends: 98 [2020-10-28 15:09:56,427 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 15:09:56,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:09:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 15:09:56,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-28 15:09:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 15:09:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-10-28 15:09:56,441 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 58 [2020-10-28 15:09:56,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:56,442 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-10-28 15:09:56,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:09:56,442 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-10-28 15:09:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 15:09:56,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:56,445 INFO L422 BasicCegarLoop]: trace histogram [24, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:56,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:09:56,446 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:56,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1980555210, now seen corresponding path program 23 times [2020-10-28 15:09:56,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:56,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676301563] [2020-10-28 15:09:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:56,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:56,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:57,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:58,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:58,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 15:09:58,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:09:58,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1941 [2020-10-28 15:09:58,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:58,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:58,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:09:58,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 15:09:58,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 15:09:58,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:58,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:58,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:58,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:58,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:58,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:58,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:09:58,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:58,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:58,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:58,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:58,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:58,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 279 proven. 225 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 15:09:58,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676301563] [2020-10-28 15:09:58,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:58,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:09:58,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591415563] [2020-10-28 15:09:58,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:09:58,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:58,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:09:58,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:09:58,709 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 19 states. [2020-10-28 15:09:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:09:59,648 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2020-10-28 15:09:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:09:59,649 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-28 15:09:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:09:59,649 INFO L225 Difference]: With dead ends: 70 [2020-10-28 15:09:59,650 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 15:09:59,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:09:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 15:09:59,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-28 15:09:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 15:09:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2020-10-28 15:09:59,663 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 60 [2020-10-28 15:09:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:09:59,663 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2020-10-28 15:09:59,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:09:59,663 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2020-10-28 15:09:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 15:09:59,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:09:59,664 INFO L422 BasicCegarLoop]: trace histogram [25, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:09:59,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:09:59,664 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:09:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:09:59,665 INFO L82 PathProgramCache]: Analyzing trace with hash -808967781, now seen corresponding path program 24 times [2020-10-28 15:09:59,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:09:59,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991786223] [2020-10-28 15:09:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:09:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:59,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:59,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:59,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:01,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:01,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 15:10:01,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:01,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2217 [2020-10-28 15:10:01,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:01,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:01,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:10:01,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:01,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:10:01,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:02,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:02,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:02,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:02,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:02,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:02,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:10:02,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:02,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:02,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:02,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:02,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:02,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 310 proven. 90 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 15:10:02,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991786223] [2020-10-28 15:10:02,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:02,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:10:02,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920821897] [2020-10-28 15:10:02,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:10:02,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:02,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:10:02,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:10:02,032 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand 13 states. [2020-10-28 15:10:02,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:02,557 INFO L93 Difference]: Finished difference Result 104 states and 137 transitions. [2020-10-28 15:10:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:10:02,558 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-28 15:10:02,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:02,559 INFO L225 Difference]: With dead ends: 104 [2020-10-28 15:10:02,559 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 15:10:02,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:10:02,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 15:10:02,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-28 15:10:02,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 15:10:02,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2020-10-28 15:10:02,571 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 62 [2020-10-28 15:10:02,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:02,572 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2020-10-28 15:10:02,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:10:02,572 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2020-10-28 15:10:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 15:10:02,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:02,573 INFO L422 BasicCegarLoop]: trace histogram [26, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:02,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:10:02,573 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:02,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:02,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1650487102, now seen corresponding path program 25 times [2020-10-28 15:10:02,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:02,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888841281] [2020-10-28 15:10:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:02,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:02,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:03,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:05,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:05,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 15:10:05,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:05,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3105 [2020-10-28 15:10:05,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:05,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:05,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:10:05,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:10:05,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 15:10:05,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:05,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:05,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:05,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:05,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:05,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:05,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:05,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:05,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:05,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:05,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:05,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:05,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 330 proven. 256 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-28 15:10:05,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888841281] [2020-10-28 15:10:05,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:05,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:10:05,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101915877] [2020-10-28 15:10:05,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:10:06,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:06,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:10:06,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:10:06,001 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 20 states. [2020-10-28 15:10:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:07,043 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-10-28 15:10:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:10:07,044 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-28 15:10:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:07,045 INFO L225 Difference]: With dead ends: 74 [2020-10-28 15:10:07,045 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 15:10:07,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:10:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 15:10:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-28 15:10:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:10:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2020-10-28 15:10:07,060 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 64 [2020-10-28 15:10:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:07,060 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2020-10-28 15:10:07,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:10:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2020-10-28 15:10:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 15:10:07,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:07,061 INFO L422 BasicCegarLoop]: trace histogram [27, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:07,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:10:07,061 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:07,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1109249699, now seen corresponding path program 26 times [2020-10-28 15:10:07,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:07,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816720816] [2020-10-28 15:10:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:07,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:07,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:07,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:09,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:09,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 15:10:09,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:09,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2730 [2020-10-28 15:10:09,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:09,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:09,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:10:09,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 15:10:09,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 15:10:09,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:10,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:10,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:10,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:10,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:10,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:10,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:10,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:10,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:10,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:10,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:10,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:10,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 350 proven. 289 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-28 15:10:10,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816720816] [2020-10-28 15:10:10,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:10,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:10:10,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38531312] [2020-10-28 15:10:10,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:10:10,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:10,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:10:10,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:10:10,130 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand 21 states. [2020-10-28 15:10:11,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:11,250 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2020-10-28 15:10:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:10:11,251 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 66 [2020-10-28 15:10:11,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:11,252 INFO L225 Difference]: With dead ends: 76 [2020-10-28 15:10:11,252 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 15:10:11,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:10:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 15:10:11,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-28 15:10:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 15:10:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2020-10-28 15:10:11,264 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 66 [2020-10-28 15:10:11,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:11,264 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2020-10-28 15:10:11,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:10:11,264 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2020-10-28 15:10:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 15:10:11,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:11,265 INFO L422 BasicCegarLoop]: trace histogram [28, 18, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:11,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:10:11,265 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:11,266 INFO L82 PathProgramCache]: Analyzing trace with hash 671148232, now seen corresponding path program 27 times [2020-10-28 15:10:11,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:11,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134095556] [2020-10-28 15:10:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:11,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:11,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:12,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:14,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:14,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 15:10:14,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:14,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3139 [2020-10-28 15:10:14,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:14,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:14,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:10:14,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:14,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:10:14,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:14,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:14,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:14,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:14,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:14,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:14,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:10:14,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:14,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:14,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:14,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:14,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:14,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 385 proven. 110 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 15:10:14,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134095556] [2020-10-28 15:10:14,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:14,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:10:14,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635465250] [2020-10-28 15:10:14,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:10:14,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:14,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:10:14,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:10:14,578 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand 14 states. [2020-10-28 15:10:15,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:15,153 INFO L93 Difference]: Finished difference Result 114 states and 151 transitions. [2020-10-28 15:10:15,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:10:15,154 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-10-28 15:10:15,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:15,155 INFO L225 Difference]: With dead ends: 114 [2020-10-28 15:10:15,155 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 15:10:15,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:10:15,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 15:10:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-28 15:10:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 15:10:15,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2020-10-28 15:10:15,168 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 68 [2020-10-28 15:10:15,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:15,168 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2020-10-28 15:10:15,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:10:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2020-10-28 15:10:15,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 15:10:15,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:15,169 INFO L422 BasicCegarLoop]: trace histogram [29, 18, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:15,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:10:15,170 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:15,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1459826731, now seen corresponding path program 28 times [2020-10-28 15:10:15,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:15,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988575989] [2020-10-28 15:10:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:15,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:15,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:16,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:17,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:17,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 15:10:17,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:17,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2464 [2020-10-28 15:10:17,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:17,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:17,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:10:17,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 15:10:17,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 15:10:17,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:18,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:18,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:18,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:18,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:18,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:18,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:18,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:18,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:18,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:18,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:18,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:18,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 407 proven. 324 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 15:10:18,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988575989] [2020-10-28 15:10:18,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:18,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:10:18,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644949651] [2020-10-28 15:10:18,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:10:18,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:18,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:10:18,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:10:18,037 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand 22 states. [2020-10-28 15:10:19,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:19,268 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2020-10-28 15:10:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:10:19,269 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2020-10-28 15:10:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:19,271 INFO L225 Difference]: With dead ends: 80 [2020-10-28 15:10:19,271 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 15:10:19,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:10:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 15:10:19,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-28 15:10:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 15:10:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2020-10-28 15:10:19,282 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 70 [2020-10-28 15:10:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:19,283 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2020-10-28 15:10:19,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:10:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2020-10-28 15:10:19,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 15:10:19,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:19,284 INFO L422 BasicCegarLoop]: trace histogram [30, 19, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:19,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:10:19,284 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:19,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:19,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1726740400, now seen corresponding path program 29 times [2020-10-28 15:10:19,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:19,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563457822] [2020-10-28 15:10:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:19,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:19,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:20,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:21,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:21,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 15:10:21,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:21,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2597 [2020-10-28 15:10:21,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:21,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:21,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:10:21,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:21,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 15:10:21,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:22,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:22,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:22,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:22,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:22,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:22,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:22,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:22,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:22,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:22,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:22,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:22,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 444 proven. 132 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-28 15:10:22,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563457822] [2020-10-28 15:10:22,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:22,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:10:22,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328449842] [2020-10-28 15:10:22,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:10:22,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:22,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:10:22,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:10:22,079 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 15 states. [2020-10-28 15:10:22,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:22,716 INFO L93 Difference]: Finished difference Result 120 states and 159 transitions. [2020-10-28 15:10:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:10:22,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 72 [2020-10-28 15:10:22,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:22,718 INFO L225 Difference]: With dead ends: 120 [2020-10-28 15:10:22,718 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 15:10:22,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:10:22,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 15:10:22,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-28 15:10:22,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 15:10:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2020-10-28 15:10:22,730 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 72 [2020-10-28 15:10:22,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:22,731 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2020-10-28 15:10:22,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:10:22,731 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2020-10-28 15:10:22,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 15:10:22,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:22,731 INFO L422 BasicCegarLoop]: trace histogram [31, 19, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:22,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:10:22,732 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:22,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:22,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1695409715, now seen corresponding path program 30 times [2020-10-28 15:10:22,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:22,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389940180] [2020-10-28 15:10:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:22,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:22,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:24,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:25,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:25,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:10:25,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:25,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2552 [2020-10-28 15:10:25,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:25,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:25,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:10:25,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 15:10:25,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 15:10:25,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:25,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:25,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:25,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:25,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:25,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:25,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:25,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:25,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:25,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 468 proven. 361 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-28 15:10:25,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389940180] [2020-10-28 15:10:25,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:25,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:10:25,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475294653] [2020-10-28 15:10:25,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:10:25,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:25,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:10:25,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:10:25,697 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand 23 states. [2020-10-28 15:10:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:26,980 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2020-10-28 15:10:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:10:26,981 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 74 [2020-10-28 15:10:26,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:26,982 INFO L225 Difference]: With dead ends: 84 [2020-10-28 15:10:26,982 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 15:10:26,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:10:26,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 15:10:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-28 15:10:26,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 15:10:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2020-10-28 15:10:26,995 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 74 [2020-10-28 15:10:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:26,996 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2020-10-28 15:10:26,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:10:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2020-10-28 15:10:26,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 15:10:26,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:26,996 INFO L422 BasicCegarLoop]: trace histogram [32, 20, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:26,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:10:26,997 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:26,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:26,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1330207832, now seen corresponding path program 31 times [2020-10-28 15:10:26,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:26,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99336263] [2020-10-28 15:10:26,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:27,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:27,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:28,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:30,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:30,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 15:10:30,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:30,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3232 [2020-10-28 15:10:30,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:30,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:30,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 15:10:30,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 15:10:30,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 15:10:30,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:30,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:30,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:30,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:30,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:30,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:30,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:30,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:30,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:30,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:30,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:30,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:30,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 492 proven. 400 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-28 15:10:30,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99336263] [2020-10-28 15:10:30,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:30,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 15:10:30,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898810947] [2020-10-28 15:10:30,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 15:10:30,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:30,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 15:10:30,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:10:30,670 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 24 states. [2020-10-28 15:10:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:32,017 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2020-10-28 15:10:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:10:32,017 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2020-10-28 15:10:32,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:32,018 INFO L225 Difference]: With dead ends: 86 [2020-10-28 15:10:32,018 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 15:10:32,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:10:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 15:10:32,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-28 15:10:32,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 15:10:32,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-10-28 15:10:32,037 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 76 [2020-10-28 15:10:32,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:32,037 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-10-28 15:10:32,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 15:10:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-10-28 15:10:32,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 15:10:32,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:32,038 INFO L422 BasicCegarLoop]: trace histogram [33, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:32,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:10:32,039 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:32,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1736450755, now seen corresponding path program 32 times [2020-10-28 15:10:32,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:32,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867722419] [2020-10-28 15:10:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:32,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:32,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:33,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:35,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 15:10:35,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:35,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3581 [2020-10-28 15:10:35,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:35,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:35,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:10:35,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:35,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:10:35,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:35,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:35,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:35,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:35,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:35,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:35,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:35,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:35,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:35,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:35,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:35,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:35,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 533 proven. 156 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-28 15:10:35,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867722419] [2020-10-28 15:10:35,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:35,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:10:35,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019932346] [2020-10-28 15:10:35,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:10:35,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:35,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:10:35,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:10:35,843 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 16 states. [2020-10-28 15:10:36,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:36,548 INFO L93 Difference]: Finished difference Result 130 states and 173 transitions. [2020-10-28 15:10:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:10:36,548 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-10-28 15:10:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:36,549 INFO L225 Difference]: With dead ends: 130 [2020-10-28 15:10:36,550 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 15:10:36,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:10:36,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 15:10:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-28 15:10:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 15:10:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2020-10-28 15:10:36,561 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 78 [2020-10-28 15:10:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:36,561 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2020-10-28 15:10:36,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:10:36,561 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2020-10-28 15:10:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 15:10:36,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:36,562 INFO L422 BasicCegarLoop]: trace histogram [34, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:36,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:10:36,563 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:36,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:36,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1862698208, now seen corresponding path program 33 times [2020-10-28 15:10:36,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:36,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700431070] [2020-10-28 15:10:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:36,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:36,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:38,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:40,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 15:10:40,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:40,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3793 [2020-10-28 15:10:40,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:40,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:40,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:10:40,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 15:10:40,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 15:10:40,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:40,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:40,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:40,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:40,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:40,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:40,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:40,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:40,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:40,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:40,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:40,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:40,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 559 proven. 441 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-28 15:10:40,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700431070] [2020-10-28 15:10:40,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:40,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:10:40,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620740083] [2020-10-28 15:10:40,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:10:40,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:40,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:10:40,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:10:40,832 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand 25 states. [2020-10-28 15:10:42,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:42,296 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2020-10-28 15:10:42,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:10:42,297 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2020-10-28 15:10:42,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:42,299 INFO L225 Difference]: With dead ends: 90 [2020-10-28 15:10:42,299 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 15:10:42,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:10:42,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 15:10:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-28 15:10:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 15:10:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2020-10-28 15:10:42,311 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 80 [2020-10-28 15:10:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:42,311 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2020-10-28 15:10:42,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:10:42,312 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2020-10-28 15:10:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 15:10:42,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:42,312 INFO L422 BasicCegarLoop]: trace histogram [35, 22, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:42,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:10:42,312 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:42,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1114307643, now seen corresponding path program 34 times [2020-10-28 15:10:42,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:42,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256459737] [2020-10-28 15:10:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:42,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:42,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:44,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:46,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:46,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 15:10:46,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:46,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4363 [2020-10-28 15:10:46,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:46,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:46,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 15:10:46,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 15:10:46,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 15:10:46,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:47,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:47,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:47,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:47,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:47,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:47,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:47,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:47,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:47,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:47,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:47,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:47,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 585 proven. 484 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-28 15:10:47,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256459737] [2020-10-28 15:10:47,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:47,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 15:10:47,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418583628] [2020-10-28 15:10:47,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 15:10:47,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:47,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 15:10:47,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:10:47,196 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand 26 states. [2020-10-28 15:10:48,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:48,729 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2020-10-28 15:10:48,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:10:48,730 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2020-10-28 15:10:48,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:48,731 INFO L225 Difference]: With dead ends: 92 [2020-10-28 15:10:48,731 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 15:10:48,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:10:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 15:10:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-28 15:10:48,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 15:10:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2020-10-28 15:10:48,746 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 82 [2020-10-28 15:10:48,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:48,746 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2020-10-28 15:10:48,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 15:10:48,746 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2020-10-28 15:10:48,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 15:10:48,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:48,747 INFO L422 BasicCegarLoop]: trace histogram [36, 23, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:48,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:10:48,747 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:48,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:48,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1568711318, now seen corresponding path program 35 times [2020-10-28 15:10:48,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:48,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550973485] [2020-10-28 15:10:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:48,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:48,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:51,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:53,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:53,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 15:10:53,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:53,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4751 [2020-10-28 15:10:53,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:53,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:10:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:10:53,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 15:10:53,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:53,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:53,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:53,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:53,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:53,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:53,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:53,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:53,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:53,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:53,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:53,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:53,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 630 proven. 182 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-28 15:10:53,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550973485] [2020-10-28 15:10:53,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:53,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:10:53,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672790740] [2020-10-28 15:10:53,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:10:53,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:53,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:10:53,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:10:53,745 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand 17 states. [2020-10-28 15:10:54,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:10:54,512 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2020-10-28 15:10:54,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:10:54,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 84 [2020-10-28 15:10:54,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:10:54,514 INFO L225 Difference]: With dead ends: 140 [2020-10-28 15:10:54,514 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 15:10:54,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:10:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 15:10:54,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-28 15:10:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 15:10:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2020-10-28 15:10:54,526 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 84 [2020-10-28 15:10:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:10:54,526 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2020-10-28 15:10:54,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:10:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2020-10-28 15:10:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 15:10:54,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:10:54,527 INFO L422 BasicCegarLoop]: trace histogram [37, 23, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:10:54,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 15:10:54,527 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:10:54,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:10:54,528 INFO L82 PathProgramCache]: Analyzing trace with hash -607879475, now seen corresponding path program 36 times [2020-10-28 15:10:54,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:10:54,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945552299] [2020-10-28 15:10:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:10:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:54,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:54,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:57,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:59,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:59,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 15:10:59,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:10:59,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4844 [2020-10-28 15:10:59,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:59,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:59,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 15:10:59,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 15:10:59,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 15:10:59,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:59,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:10:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:10:59,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:10:59,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:10:59,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:10:59,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:10:59,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:10:59,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:10:59,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:10:59,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:10:59,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:10:59,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:10:59,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:10:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 658 proven. 529 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-28 15:10:59,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945552299] [2020-10-28 15:10:59,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:10:59,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 15:10:59,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244992345] [2020-10-28 15:10:59,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 15:10:59,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:10:59,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 15:10:59,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:10:59,908 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand 27 states. [2020-10-28 15:11:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:01,514 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2020-10-28 15:11:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 15:11:01,515 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 86 [2020-10-28 15:11:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:01,516 INFO L225 Difference]: With dead ends: 96 [2020-10-28 15:11:01,516 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 15:11:01,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 15:11:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 15:11:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-28 15:11:01,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 15:11:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2020-10-28 15:11:01,532 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 86 [2020-10-28 15:11:01,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:01,533 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2020-10-28 15:11:01,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 15:11:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2020-10-28 15:11:01,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 15:11:01,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:01,534 INFO L422 BasicCegarLoop]: trace histogram [38, 24, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:01,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:11:01,534 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:01,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:01,534 INFO L82 PathProgramCache]: Analyzing trace with hash -222546318, now seen corresponding path program 37 times [2020-10-28 15:11:01,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:01,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774387395] [2020-10-28 15:11:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:01,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:01,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:04,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:06,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 15:11:06,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:06,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4830 [2020-10-28 15:11:06,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:06,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:06,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:11:06,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:06,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 15:11:06,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:06,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:06,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:06,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:06,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:06,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:06,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:11:06,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:06,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:06,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:06,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:06,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:06,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 705 proven. 210 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-28 15:11:06,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774387395] [2020-10-28 15:11:06,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:06,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:11:06,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869755163] [2020-10-28 15:11:06,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:11:06,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:06,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:11:06,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:11:06,616 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand 18 states. [2020-10-28 15:11:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:07,415 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2020-10-28 15:11:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:11:07,416 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 88 [2020-10-28 15:11:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:07,417 INFO L225 Difference]: With dead ends: 146 [2020-10-28 15:11:07,417 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 15:11:07,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:11:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 15:11:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-28 15:11:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 15:11:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2020-10-28 15:11:07,442 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 88 [2020-10-28 15:11:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:07,443 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2020-10-28 15:11:07,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:11:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2020-10-28 15:11:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 15:11:07,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:07,444 INFO L422 BasicCegarLoop]: trace histogram [39, 24, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:07,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:11:07,444 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:07,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:07,444 INFO L82 PathProgramCache]: Analyzing trace with hash -671355307, now seen corresponding path program 38 times [2020-10-28 15:11:07,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:07,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899646959] [2020-10-28 15:11:07,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:07,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:07,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:08,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:10,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:10,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 15:11:10,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:10,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3339 [2020-10-28 15:11:10,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:10,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:10,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 15:11:10,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 15:11:10,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 15:11:10,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:11,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:11,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:11,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:11,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:11,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:11,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:11,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:11,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:11,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:11,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:11,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:11,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 735 proven. 576 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-28 15:11:11,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899646959] [2020-10-28 15:11:11,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:11,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 15:11:11,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764013727] [2020-10-28 15:11:11,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 15:11:11,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:11,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 15:11:11,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:11:11,376 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 28 states. [2020-10-28 15:11:13,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:13,035 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2020-10-28 15:11:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:11:13,035 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 90 [2020-10-28 15:11:13,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:13,037 INFO L225 Difference]: With dead ends: 100 [2020-10-28 15:11:13,037 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 15:11:13,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 15:11:13,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 15:11:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-28 15:11:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 15:11:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-10-28 15:11:13,052 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 90 [2020-10-28 15:11:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:13,052 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-10-28 15:11:13,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 15:11:13,053 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-10-28 15:11:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 15:11:13,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:13,054 INFO L422 BasicCegarLoop]: trace histogram [40, 25, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:13,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 15:11:13,054 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:13,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:13,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1093278726, now seen corresponding path program 39 times [2020-10-28 15:11:13,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:13,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748814825] [2020-10-28 15:11:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:13,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:13,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:13,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:16,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:16,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 15:11:16,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:16,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3760 [2020-10-28 15:11:16,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:16,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 15:11:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 15:11:16,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 15:11:16,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:17,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:17,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:17,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:17,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:17,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:17,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:17,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:17,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:17,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:17,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:17,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:17,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 765 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-28 15:11:17,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748814825] [2020-10-28 15:11:17,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:17,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 15:11:17,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463014641] [2020-10-28 15:11:17,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 15:11:17,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:17,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 15:11:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:11:17,429 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 29 states. [2020-10-28 15:11:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:19,132 INFO L93 Difference]: Finished difference Result 102 states and 129 transitions. [2020-10-28 15:11:19,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:11:19,133 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2020-10-28 15:11:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:19,134 INFO L225 Difference]: With dead ends: 102 [2020-10-28 15:11:19,135 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 15:11:19,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 15:11:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 15:11:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-28 15:11:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 15:11:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2020-10-28 15:11:19,149 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 92 [2020-10-28 15:11:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:19,149 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2020-10-28 15:11:19,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 15:11:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2020-10-28 15:11:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 15:11:19,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:19,151 INFO L422 BasicCegarLoop]: trace histogram [41, 26, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:19,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:11:19,151 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:19,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:19,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1460208735, now seen corresponding path program 40 times [2020-10-28 15:11:19,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:19,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432147940] [2020-10-28 15:11:19,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:19,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:19,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:19,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:23,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:23,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 15:11:23,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:23,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4129 [2020-10-28 15:11:23,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:23,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:23,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:11:23,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:23,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 15:11:23,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:23,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:23,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:23,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:23,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:23,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:23,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:23,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:23,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:23,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:23,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:23,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:23,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 816 proven. 240 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-28 15:11:23,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432147940] [2020-10-28 15:11:23,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:23,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:11:23,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144328349] [2020-10-28 15:11:23,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:11:23,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:23,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:11:23,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:11:23,575 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand 19 states. [2020-10-28 15:11:24,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:24,475 INFO L93 Difference]: Finished difference Result 156 states and 209 transitions. [2020-10-28 15:11:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:11:24,475 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-10-28 15:11:24,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:24,477 INFO L225 Difference]: With dead ends: 156 [2020-10-28 15:11:24,477 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 15:11:24,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:11:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 15:11:24,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-28 15:11:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 15:11:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions. [2020-10-28 15:11:24,490 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 94 [2020-10-28 15:11:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:24,490 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions. [2020-10-28 15:11:24,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:11:24,491 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions. [2020-10-28 15:11:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 15:11:24,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:24,491 INFO L422 BasicCegarLoop]: trace histogram [42, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:24,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:11:24,492 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:24,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1920334334, now seen corresponding path program 41 times [2020-10-28 15:11:24,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:24,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361460074] [2020-10-28 15:11:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:24,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:24,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:24,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:28,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:28,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 15:11:28,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:28,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4056 [2020-10-28 15:11:28,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:28,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:28,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 15:11:28,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 15:11:28,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 15:11:28,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:29,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:29,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:29,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:29,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:29,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:29,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:29,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:29,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:29,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:29,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:29,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:29,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 848 proven. 676 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-28 15:11:29,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361460074] [2020-10-28 15:11:29,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:29,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 15:11:29,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600050134] [2020-10-28 15:11:29,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 15:11:29,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:29,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 15:11:29,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:11:29,205 INFO L87 Difference]: Start difference. First operand 97 states and 123 transitions. Second operand 30 states. [2020-10-28 15:11:31,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:31,100 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2020-10-28 15:11:31,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 15:11:31,100 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 96 [2020-10-28 15:11:31,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:31,102 INFO L225 Difference]: With dead ends: 106 [2020-10-28 15:11:31,102 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 15:11:31,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 15:11:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 15:11:31,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-28 15:11:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 15:11:31,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-10-28 15:11:31,119 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 96 [2020-10-28 15:11:31,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:31,120 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-10-28 15:11:31,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 15:11:31,120 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-10-28 15:11:31,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 15:11:31,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:31,121 INFO L422 BasicCegarLoop]: trace histogram [43, 27, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:31,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:11:31,121 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:31,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:31,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1228719207, now seen corresponding path program 42 times [2020-10-28 15:11:31,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:31,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763239887] [2020-10-28 15:11:31,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:31,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:31,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:31,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:35,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:35,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 15:11:35,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:35,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4512 [2020-10-28 15:11:35,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:35,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:35,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:11:35,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:35,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 15:11:35,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:35,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:35,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:35,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:35,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:35,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:35,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:35,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:35,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:35,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:35,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 901 proven. 272 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-28 15:11:36,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763239887] [2020-10-28 15:11:36,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:36,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:11:36,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856156172] [2020-10-28 15:11:36,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:11:36,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:36,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:11:36,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:11:36,020 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 20 states. [2020-10-28 15:11:36,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:36,970 INFO L93 Difference]: Finished difference Result 162 states and 217 transitions. [2020-10-28 15:11:36,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:11:36,971 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2020-10-28 15:11:36,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:36,971 INFO L225 Difference]: With dead ends: 162 [2020-10-28 15:11:36,972 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 15:11:36,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:11:36,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 15:11:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-28 15:11:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 15:11:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2020-10-28 15:11:36,989 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 98 [2020-10-28 15:11:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:36,989 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2020-10-28 15:11:36,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:11:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2020-10-28 15:11:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 15:11:36,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:36,990 INFO L422 BasicCegarLoop]: trace histogram [44, 27, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:36,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 15:11:36,990 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:36,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:36,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1850621066, now seen corresponding path program 43 times [2020-10-28 15:11:36,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:36,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320754757] [2020-10-28 15:11:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:37,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:37,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:37,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:41,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:41,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 15:11:41,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:41,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4888 [2020-10-28 15:11:41,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:41,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 15:11:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 15:11:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 15:11:41,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:42,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:42,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:42,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:42,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:42,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:42,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:42,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:42,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:42,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:42,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:42,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:42,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 935 proven. 729 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-28 15:11:42,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320754757] [2020-10-28 15:11:42,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:42,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 15:11:42,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520305874] [2020-10-28 15:11:42,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 15:11:42,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:42,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 15:11:42,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:11:42,549 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand 31 states. [2020-10-28 15:11:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:44,463 INFO L93 Difference]: Finished difference Result 110 states and 139 transitions. [2020-10-28 15:11:44,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:11:44,464 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 100 [2020-10-28 15:11:44,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:44,465 INFO L225 Difference]: With dead ends: 110 [2020-10-28 15:11:44,465 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 15:11:44,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 15:11:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 15:11:44,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-28 15:11:44,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 15:11:44,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 131 transitions. [2020-10-28 15:11:44,484 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 131 transitions. Word has length 100 [2020-10-28 15:11:44,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:44,484 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 131 transitions. [2020-10-28 15:11:44,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 15:11:44,484 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 131 transitions. [2020-10-28 15:11:44,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 15:11:44,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:44,485 INFO L422 BasicCegarLoop]: trace histogram [45, 28, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:44,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 15:11:44,485 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:44,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:44,486 INFO L82 PathProgramCache]: Analyzing trace with hash 164460783, now seen corresponding path program 44 times [2020-10-28 15:11:44,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:44,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547321556] [2020-10-28 15:11:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:44,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:44,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:45,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:49,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:49,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 15:11:49,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:49,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4910 [2020-10-28 15:11:49,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:49,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:49,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 15:11:49,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 15:11:49,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 15:11:49,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:50,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:50,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:50,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:50,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:50,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:50,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:11:50,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:50,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:50,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:50,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:50,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:50,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 969 proven. 784 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-28 15:11:50,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547321556] [2020-10-28 15:11:50,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:50,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 15:11:50,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476489675] [2020-10-28 15:11:50,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 15:11:50,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:50,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 15:11:50,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:11:50,156 INFO L87 Difference]: Start difference. First operand 103 states and 131 transitions. Second operand 32 states. [2020-10-28 15:11:52,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:52,165 INFO L93 Difference]: Finished difference Result 112 states and 142 transitions. [2020-10-28 15:11:52,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 15:11:52,166 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 102 [2020-10-28 15:11:52,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:52,167 INFO L225 Difference]: With dead ends: 112 [2020-10-28 15:11:52,167 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 15:11:52,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 15:11:52,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 15:11:52,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-28 15:11:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 15:11:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 134 transitions. [2020-10-28 15:11:52,186 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 134 transitions. Word has length 102 [2020-10-28 15:11:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:52,186 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 134 transitions. [2020-10-28 15:11:52,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 15:11:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 134 transitions. [2020-10-28 15:11:52,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 15:11:52,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:52,187 INFO L422 BasicCegarLoop]: trace histogram [46, 29, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:52,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 15:11:52,188 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:52,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:52,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1032900588, now seen corresponding path program 45 times [2020-10-28 15:11:52,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:52,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276906462] [2020-10-28 15:11:52,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:52,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:52,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:52,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:57,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:57,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 15:11:57,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:57,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:11:57,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:57,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:57,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:11:57,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:57,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 15:11:57,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:57,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:57,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:57,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:57,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:57,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:57,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:57,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:57,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:57,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:57,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:57,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:57,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1026 proven. 306 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-28 15:11:57,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276906462] [2020-10-28 15:11:57,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:57,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:11:57,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119280556] [2020-10-28 15:11:57,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:11:57,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:57,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:11:57,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:11:57,543 INFO L87 Difference]: Start difference. First operand 105 states and 134 transitions. Second operand 21 states. [2020-10-28 15:11:58,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:58,590 INFO L93 Difference]: Finished difference Result 172 states and 231 transitions. [2020-10-28 15:11:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:11:58,595 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-10-28 15:11:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:58,596 INFO L225 Difference]: With dead ends: 172 [2020-10-28 15:11:58,596 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 15:11:58,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:11:58,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 15:11:58,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-28 15:11:58,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-28 15:11:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 136 transitions. [2020-10-28 15:11:58,613 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 136 transitions. Word has length 104 [2020-10-28 15:11:58,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:58,614 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 136 transitions. [2020-10-28 15:11:58,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:11:58,614 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 136 transitions. [2020-10-28 15:11:58,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 15:11:58,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:58,615 INFO L422 BasicCegarLoop]: trace histogram [47, 29, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:58,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 15:11:58,615 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:58,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:58,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1040237047, now seen corresponding path program 46 times [2020-10-28 15:11:58,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:58,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826334002] [2020-10-28 15:11:58,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:58,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:58,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:59,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:03,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:03,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 15:12:03,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:03,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4949 [2020-10-28 15:12:03,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:03,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:03,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 15:12:03,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 15:12:03,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 15:12:03,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:04,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:04,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:04,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:04,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:04,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:04,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:04,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:04,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:04,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:04,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:04,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:04,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1062 proven. 841 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-28 15:12:04,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826334002] [2020-10-28 15:12:04,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:04,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 15:12:04,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434796678] [2020-10-28 15:12:04,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 15:12:04,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:04,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 15:12:04,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:12:04,369 INFO L87 Difference]: Start difference. First operand 107 states and 136 transitions. Second operand 33 states. [2020-10-28 15:12:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:06,510 INFO L93 Difference]: Finished difference Result 116 states and 147 transitions. [2020-10-28 15:12:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 15:12:06,511 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 106 [2020-10-28 15:12:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:06,512 INFO L225 Difference]: With dead ends: 116 [2020-10-28 15:12:06,512 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 15:12:06,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 15:12:06,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 15:12:06,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-28 15:12:06,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 15:12:06,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 139 transitions. [2020-10-28 15:12:06,529 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 139 transitions. Word has length 106 [2020-10-28 15:12:06,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:06,529 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 139 transitions. [2020-10-28 15:12:06,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 15:12:06,529 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 139 transitions. [2020-10-28 15:12:06,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 15:12:06,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:06,530 INFO L422 BasicCegarLoop]: trace histogram [48, 30, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:06,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 15:12:06,530 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:06,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:06,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1225500900, now seen corresponding path program 47 times [2020-10-28 15:12:06,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:06,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861173614] [2020-10-28 15:12:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:06,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:06,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:06,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:11,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:11,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 15:12:11,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:11,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 15:12:11,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:11,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:11,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 15:12:11,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 15:12:11,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 15:12:11,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:12,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:12,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:12,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:12,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:12,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:12,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:12:12,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:12,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:12,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:12,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:12,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:12,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1098 proven. 900 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-28 15:12:12,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861173614] [2020-10-28 15:12:12,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:12,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 15:12:12,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216212191] [2020-10-28 15:12:12,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 15:12:12,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:12,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 15:12:12,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 15:12:12,359 INFO L87 Difference]: Start difference. First operand 109 states and 139 transitions. Second operand 34 states. [2020-10-28 15:12:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:14,555 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2020-10-28 15:12:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 15:12:14,555 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 108 [2020-10-28 15:12:14,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:14,556 INFO L225 Difference]: With dead ends: 118 [2020-10-28 15:12:14,556 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 15:12:14,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 15:12:14,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 15:12:14,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-28 15:12:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 15:12:14,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 142 transitions. [2020-10-28 15:12:14,570 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 142 transitions. Word has length 108 [2020-10-28 15:12:14,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:14,570 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 142 transitions. [2020-10-28 15:12:14,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 15:12:14,570 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 142 transitions. [2020-10-28 15:12:14,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 15:12:14,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:14,571 INFO L422 BasicCegarLoop]: trace histogram [49, 31, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:14,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 15:12:14,571 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:14,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1051248895, now seen corresponding path program 48 times [2020-10-28 15:12:14,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:14,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910220812] [2020-10-28 15:12:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:14,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:14,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:15,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:19,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:19,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 15:12:19,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:19,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:12:19,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:19,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:19,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:12:19,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:19,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 15:12:19,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:19,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:19,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:19,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:19,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:19,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:19,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:19,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:19,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:19,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:19,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:19,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:19,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1159 proven. 342 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-28 15:12:19,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910220812] [2020-10-28 15:12:19,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:19,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:12:19,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104497170] [2020-10-28 15:12:19,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:12:19,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:19,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:12:19,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:12:19,956 INFO L87 Difference]: Start difference. First operand 111 states and 142 transitions. Second operand 22 states. [2020-10-28 15:12:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:21,084 INFO L93 Difference]: Finished difference Result 182 states and 245 transitions. [2020-10-28 15:12:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:12:21,084 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 110 [2020-10-28 15:12:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:21,086 INFO L225 Difference]: With dead ends: 182 [2020-10-28 15:12:21,086 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 15:12:21,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:12:21,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 15:12:21,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-10-28 15:12:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-28 15:12:21,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 144 transitions. [2020-10-28 15:12:21,105 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 144 transitions. Word has length 110 [2020-10-28 15:12:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:21,105 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 144 transitions. [2020-10-28 15:12:21,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:12:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 144 transitions. [2020-10-28 15:12:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 15:12:21,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:21,106 INFO L422 BasicCegarLoop]: trace histogram [50, 31, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:21,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 15:12:21,106 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:21,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:21,107 INFO L82 PathProgramCache]: Analyzing trace with hash -606170460, now seen corresponding path program 49 times [2020-10-28 15:12:21,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:21,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015153342] [2020-10-28 15:12:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:21,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:21,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:21,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:26,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:26,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 15:12:26,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:26,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 15:12:26,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:26,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:26,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 15:12:26,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 15:12:26,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 15:12:26,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:26,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:26,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:26,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:26,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:26,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:26,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:26,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:26,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:26,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:26,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:26,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:26,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1197 proven. 961 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-28 15:12:27,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015153342] [2020-10-28 15:12:27,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:27,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 15:12:27,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001513569] [2020-10-28 15:12:27,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 15:12:27,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:27,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 15:12:27,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:12:27,010 INFO L87 Difference]: Start difference. First operand 113 states and 144 transitions. Second operand 35 states. [2020-10-28 15:12:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:29,386 INFO L93 Difference]: Finished difference Result 122 states and 155 transitions. [2020-10-28 15:12:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 15:12:29,386 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 112 [2020-10-28 15:12:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:29,388 INFO L225 Difference]: With dead ends: 122 [2020-10-28 15:12:29,388 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 15:12:29,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 15:12:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 15:12:29,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-28 15:12:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 15:12:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 147 transitions. [2020-10-28 15:12:29,402 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 147 transitions. Word has length 112 [2020-10-28 15:12:29,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:29,403 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 147 transitions. [2020-10-28 15:12:29,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 15:12:29,403 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 147 transitions. [2020-10-28 15:12:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 15:12:29,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:29,404 INFO L422 BasicCegarLoop]: trace histogram [51, 32, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:29,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 15:12:29,404 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:29,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1419817097, now seen corresponding path program 50 times [2020-10-28 15:12:29,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:29,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015683130] [2020-10-28 15:12:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:29,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:29,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:29,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:34,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:34,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 15:12:34,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:34,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:12:34,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:34,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:34,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:12:34,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:34,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 15:12:34,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:34,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:34,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:34,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:34,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:34,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:34,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:12:34,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:34,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:34,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:34,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:34,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:34,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1260 proven. 380 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-28 15:12:34,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015683130] [2020-10-28 15:12:34,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:34,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:12:34,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193436652] [2020-10-28 15:12:34,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:12:34,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:34,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:12:34,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:12:34,827 INFO L87 Difference]: Start difference. First operand 115 states and 147 transitions. Second operand 23 states. [2020-10-28 15:12:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:35,938 INFO L93 Difference]: Finished difference Result 188 states and 253 transitions. [2020-10-28 15:12:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:12:35,939 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 114 [2020-10-28 15:12:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:35,941 INFO L225 Difference]: With dead ends: 188 [2020-10-28 15:12:35,941 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 15:12:35,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:12:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 15:12:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-28 15:12:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 15:12:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 149 transitions. [2020-10-28 15:12:35,959 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 149 transitions. Word has length 114 [2020-10-28 15:12:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:35,959 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 149 transitions. [2020-10-28 15:12:35,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:12:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 149 transitions. [2020-10-28 15:12:35,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 15:12:35,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:35,960 INFO L422 BasicCegarLoop]: trace histogram [52, 32, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:35,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 15:12:35,961 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:35,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:35,961 INFO L82 PathProgramCache]: Analyzing trace with hash -553942356, now seen corresponding path program 51 times [2020-10-28 15:12:35,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:35,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960632112] [2020-10-28 15:12:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:35,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:36,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:36,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:40,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:40,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 15:12:40,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:40,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:12:40,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:40,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:40,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 15:12:40,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 15:12:40,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 15:12:40,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:41,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:41,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:41,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:41,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:41,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:41,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:41,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:41,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:41,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:41,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:41,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:41,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1300 proven. 1024 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-28 15:12:41,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960632112] [2020-10-28 15:12:41,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:41,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 15:12:41,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540085174] [2020-10-28 15:12:41,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 15:12:41,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:41,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 15:12:41,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 15:12:41,907 INFO L87 Difference]: Start difference. First operand 117 states and 149 transitions. Second operand 36 states. [2020-10-28 15:12:44,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:44,293 INFO L93 Difference]: Finished difference Result 126 states and 160 transitions. [2020-10-28 15:12:44,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 15:12:44,294 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 116 [2020-10-28 15:12:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:44,295 INFO L225 Difference]: With dead ends: 126 [2020-10-28 15:12:44,295 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 15:12:44,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 15:12:44,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 15:12:44,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-28 15:12:44,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 15:12:44,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 152 transitions. [2020-10-28 15:12:44,314 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 152 transitions. Word has length 116 [2020-10-28 15:12:44,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:44,315 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 152 transitions. [2020-10-28 15:12:44,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 15:12:44,315 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 152 transitions. [2020-10-28 15:12:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-28 15:12:44,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:44,316 INFO L422 BasicCegarLoop]: trace histogram [53, 33, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:44,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-28 15:12:44,316 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:44,316 INFO L82 PathProgramCache]: Analyzing trace with hash 71417489, now seen corresponding path program 52 times [2020-10-28 15:12:44,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:44,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297492393] [2020-10-28 15:12:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:44,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:44,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:44,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:49,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:49,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-28 15:12:49,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:49,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:12:49,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:49,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:49,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 15:12:49,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 15:12:49,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 15:12:49,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:50,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:50,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:50,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:50,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:50,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:50,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:50,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:50,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:50,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:50,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:50,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:50,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1340 proven. 1089 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-28 15:12:50,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297492393] [2020-10-28 15:12:50,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:50,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 15:12:50,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922175100] [2020-10-28 15:12:50,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 15:12:50,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:50,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 15:12:50,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:12:50,321 INFO L87 Difference]: Start difference. First operand 119 states and 152 transitions. Second operand 37 states. [2020-10-28 15:12:52,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:52,922 INFO L93 Difference]: Finished difference Result 128 states and 163 transitions. [2020-10-28 15:12:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 15:12:52,923 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 118 [2020-10-28 15:12:52,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:52,924 INFO L225 Difference]: With dead ends: 128 [2020-10-28 15:12:52,924 INFO L226 Difference]: Without dead ends: 122 [2020-10-28 15:12:52,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-28 15:12:52,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-28 15:12:52,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-28 15:12:52,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 15:12:52,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 155 transitions. [2020-10-28 15:12:52,945 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 155 transitions. Word has length 118 [2020-10-28 15:12:52,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:52,945 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 155 transitions. [2020-10-28 15:12:52,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 15:12:52,946 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 155 transitions. [2020-10-28 15:12:52,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 15:12:52,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:52,946 INFO L422 BasicCegarLoop]: trace histogram [54, 34, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:52,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-28 15:12:52,947 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:52,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:52,947 INFO L82 PathProgramCache]: Analyzing trace with hash -253192906, now seen corresponding path program 53 times [2020-10-28 15:12:52,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:52,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637331785] [2020-10-28 15:12:52,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:52,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:53,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:53,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:57,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:57,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 15:12:57,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:12:57,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:12:57,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:57,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:57,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 15:12:57,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:57,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 15:12:57,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:58,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:58,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:58,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:58,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:58,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:58,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:12:58,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:58,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:58,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:58,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:58,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:58,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1407 proven. 420 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-28 15:12:58,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637331785] [2020-10-28 15:12:58,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:58,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 15:12:58,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456410234] [2020-10-28 15:12:58,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 15:12:58,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:58,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 15:12:58,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:12:58,405 INFO L87 Difference]: Start difference. First operand 121 states and 155 transitions. Second operand 24 states. [2020-10-28 15:12:59,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:59,681 INFO L93 Difference]: Finished difference Result 198 states and 267 transitions. [2020-10-28 15:12:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:12:59,681 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 120 [2020-10-28 15:12:59,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:59,683 INFO L225 Difference]: With dead ends: 198 [2020-10-28 15:12:59,683 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 15:12:59,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:12:59,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 15:12:59,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-28 15:12:59,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-28 15:12:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 157 transitions. [2020-10-28 15:12:59,698 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 157 transitions. Word has length 120 [2020-10-28 15:12:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:59,698 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 157 transitions. [2020-10-28 15:12:59,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 15:12:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 157 transitions. [2020-10-28 15:12:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 15:12:59,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:59,699 INFO L422 BasicCegarLoop]: trace histogram [55, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:59,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-28 15:12:59,699 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:59,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:59,699 INFO L82 PathProgramCache]: Analyzing trace with hash -405274343, now seen corresponding path program 54 times [2020-10-28 15:12:59,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:59,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982419152] [2020-10-28 15:12:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:59,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:00,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:00,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:04,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:04,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 15:13:04,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:04,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:13:04,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:04,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:04,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 15:13:04,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 15:13:04,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 15:13:04,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:05,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:05,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:05,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:05,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:05,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:05,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:05,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:05,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:05,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:05,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:05,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:05,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1449 proven. 1156 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-28 15:13:05,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982419152] [2020-10-28 15:13:05,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:05,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 15:13:05,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627232293] [2020-10-28 15:13:05,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 15:13:05,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:05,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 15:13:05,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 15:13:05,766 INFO L87 Difference]: Start difference. First operand 123 states and 157 transitions. Second operand 38 states. [2020-10-28 15:13:08,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:08,462 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2020-10-28 15:13:08,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 15:13:08,463 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 122 [2020-10-28 15:13:08,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:08,465 INFO L225 Difference]: With dead ends: 132 [2020-10-28 15:13:08,465 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 15:13:08,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-28 15:13:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 15:13:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-28 15:13:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-28 15:13:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 160 transitions. [2020-10-28 15:13:08,485 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 160 transitions. Word has length 122 [2020-10-28 15:13:08,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:08,486 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 160 transitions. [2020-10-28 15:13:08,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 15:13:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 160 transitions. [2020-10-28 15:13:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 15:13:08,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:08,487 INFO L422 BasicCegarLoop]: trace histogram [56, 35, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:08,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-28 15:13:08,487 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:08,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1207457214, now seen corresponding path program 55 times [2020-10-28 15:13:08,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:08,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060271013] [2020-10-28 15:13:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:08,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:08,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:09,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:13,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:13,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 15:13:13,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:13:13,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:13:13,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:13,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:13,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:13:13,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:13:13,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 15:13:13,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:13,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:13,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:13,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:13,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:13,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:13,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:13:13,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:13,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:13,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:13,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:13,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:13,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1518 proven. 462 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-28 15:13:13,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060271013] [2020-10-28 15:13:13,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:13,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:13:13,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300550327] [2020-10-28 15:13:13,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:13:13,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:13,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:13:13,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:13:13,956 INFO L87 Difference]: Start difference. First operand 125 states and 160 transitions. Second operand 25 states. [2020-10-28 15:13:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:15,186 INFO L93 Difference]: Finished difference Result 204 states and 275 transitions. [2020-10-28 15:13:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:13:15,187 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 124 [2020-10-28 15:13:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:15,188 INFO L225 Difference]: With dead ends: 204 [2020-10-28 15:13:15,188 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 15:13:15,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:13:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 15:13:15,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-28 15:13:15,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 15:13:15,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 162 transitions. [2020-10-28 15:13:15,210 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 162 transitions. Word has length 124 [2020-10-28 15:13:15,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:15,211 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 162 transitions. [2020-10-28 15:13:15,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:13:15,211 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 162 transitions. [2020-10-28 15:13:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 15:13:15,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:15,212 INFO L422 BasicCegarLoop]: trace histogram [57, 35, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:15,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-28 15:13:15,212 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:15,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:15,213 INFO L82 PathProgramCache]: Analyzing trace with hash 532224033, now seen corresponding path program 56 times [2020-10-28 15:13:15,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:15,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417981997] [2020-10-28 15:13:15,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:15,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:15,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:16,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking...