/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/array-fpi/s3lif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:18:13,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:18:13,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:18:13,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:18:13,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:18:13,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:18:13,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:18:13,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:18:13,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:18:13,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:18:13,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:18:13,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:18:13,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:18:13,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:18:13,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:18:13,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:18:13,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:18:13,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:18:13,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:18:13,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:18:13,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:18:13,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:18:13,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:18:13,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:18:13,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:18:13,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:18:13,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:18:13,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:18:13,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:18:13,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:18:13,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:18:13,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:18:13,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:18:13,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:18:13,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:18:13,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:18:13,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:18:13,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:18:13,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:18:13,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:18:13,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:18:13,313 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 09:18:13,384 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:18:13,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:18:13,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:18:13,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:18:13,394 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:18:13,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:18:13,397 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:18:13,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:18:13,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:18:13,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:18:13,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:18:13,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:18:13,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:18:13,401 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:18:13,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:18:13,401 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:18:13,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:18:13,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:18:13,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:18:13,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:18:13,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:18:13,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:18:13,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:18:13,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:18:13,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:18:13,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:18:13,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:18:13,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:18:13,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:18:13,406 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:18:13,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:18:14,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:18:14,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:18:14,030 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:18:14,037 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:18:14,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s3lif.c [2020-10-28 09:18:14,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a50dbaa8/7eecb4e70ff44ae9b0438a5baa841aee/FLAGbdb38af97 [2020-10-28 09:18:14,772 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:18:14,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s3lif.c [2020-10-28 09:18:14,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a50dbaa8/7eecb4e70ff44ae9b0438a5baa841aee/FLAGbdb38af97 [2020-10-28 09:18:15,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4a50dbaa8/7eecb4e70ff44ae9b0438a5baa841aee [2020-10-28 09:18:15,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:18:15,158 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:18:15,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:18:15,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:18:15,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:18:15,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:18:15" (1/1) ... [2020-10-28 09:18:15,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fb2df7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:15, skipping insertion in model container [2020-10-28 09:18:15,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:18:15" (1/1) ... [2020-10-28 09:18:15,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:18:15,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:18:15,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:18:15,494 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:18:15,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:18:15,559 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:18:15,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:15 WrapperNode [2020-10-28 09:18:15,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:18:15,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:18:15,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:18:15,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:18:15,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:15" (1/1) ... [2020-10-28 09:18:15,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:15" (1/1) ... [2020-10-28 09:18:15,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:15" (1/1) ... [2020-10-28 09:18:15,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:15" (1/1) ... [2020-10-28 09:18:15,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:15" (1/1) ... [2020-10-28 09:18:15,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:15" (1/1) ... [2020-10-28 09:18:15,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:15" (1/1) ... [2020-10-28 09:18:15,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:18:15,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:18:15,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:18:15,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:18:15,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:15" (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 09:18:15,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:18:15,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:18:15,714 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:18:15,714 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:18:15,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:18:15,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:18:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:18:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:18:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:18:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:18:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:18:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:18:15,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:18:15,716 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:18:15,716 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:18:15,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:18:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:18:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:18:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:18:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:18:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:18:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:18:16,354 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:18:16,356 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 09:18:16,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:18:16 BoogieIcfgContainer [2020-10-28 09:18:16,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:18:16,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:18:16,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:18:16,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:18:16,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:18:15" (1/3) ... [2020-10-28 09:18:16,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f56bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:18:16, skipping insertion in model container [2020-10-28 09:18:16,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:15" (2/3) ... [2020-10-28 09:18:16,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f56bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:18:16, skipping insertion in model container [2020-10-28 09:18:16,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:18:16" (3/3) ... [2020-10-28 09:18:16,379 INFO L111 eAbstractionObserver]: Analyzing ICFG s3lif.c [2020-10-28 09:18:16,400 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:18:16,407 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:18:16,429 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:18:16,482 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:18:16,482 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:18:16,482 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:18:16,482 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:18:16,482 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:18:16,483 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:18:16,483 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:18:16,483 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:18:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-28 09:18:16,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:18:16,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:16,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:16,528 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:16,539 INFO L82 PathProgramCache]: Analyzing trace with hash 371341983, now seen corresponding path program 1 times [2020-10-28 09:18:16,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:16,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285288678] [2020-10-28 09:18:16,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:16,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:16,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:17,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:17,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:17,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:17,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 09:18:17,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:18:17,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1126 [2020-10-28 09:18:17,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:17,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:17,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:17,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:18:17,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:17,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:18:18,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:18,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:18,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:18,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:18,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:18,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 09:18:18,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:18,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:18,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:18,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:18:18,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:18,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:18,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:18,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:18,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:18,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:18:18,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:18,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:18,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:18,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 09:18:18,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:18,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:18,158 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 09:18:18,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285288678] [2020-10-28 09:18:18,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:18:18,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:18:18,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384492945] [2020-10-28 09:18:18,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:18:18,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:18,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:18:18,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:18:18,190 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-28 09:18:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:18,337 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-28 09:18:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:18:18,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-28 09:18:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:18,348 INFO L225 Difference]: With dead ends: 65 [2020-10-28 09:18:18,349 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:18:18,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 09:18:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:18:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 09:18:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 09:18:18,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 09:18:18,401 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2020-10-28 09:18:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:18,402 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 09:18:18,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:18:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 09:18:18,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:18:18,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:18,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:18,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:18:18,405 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:18,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:18,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1793608214, now seen corresponding path program 1 times [2020-10-28 09:18:18,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:18,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677771471] [2020-10-28 09:18:18,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:18,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:18,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:18,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:18,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:18,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 09:18:18,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:18:18,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-28 09:18:18,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:18,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:18,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:18:18,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:18:18,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:18:18,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:19,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:19,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:19,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:19,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:19,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:19,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:18:19,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:19,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:19,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:19,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:19,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:19,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:19,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:19,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:19,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:19,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:19,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:19,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:18:19,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:19,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:19,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:18:19,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:19,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:18:19,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:19,135 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 09:18:19,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677771471] [2020-10-28 09:18:19,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:18:19,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:18:19,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371910240] [2020-10-28 09:18:19,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:18:19,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:19,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:18:19,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:18:19,140 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-28 09:18:19,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:19,343 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-28 09:18:19,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:18:19,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-28 09:18:19,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:19,345 INFO L225 Difference]: With dead ends: 46 [2020-10-28 09:18:19,346 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 09:18:19,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:18:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 09:18:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 09:18:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 09:18:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-28 09:18:19,358 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-28 09:18:19,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:19,359 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-28 09:18:19,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:18:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-28 09:18:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:18:19,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:19,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:19,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:18:19,361 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:19,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:19,362 INFO L82 PathProgramCache]: Analyzing trace with hash -2090381425, now seen corresponding path program 1 times [2020-10-28 09:18:19,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:19,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552466483] [2020-10-28 09:18:19,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:19,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:19,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:19,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:20,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:20,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:20,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:20,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:21,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:23,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:23,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:18:23,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:18:23,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4006 [2020-10-28 09:18:23,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:23,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:18:23,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:23,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:18:23,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:18:24,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:24,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:24,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:24,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:24,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:24,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:18:24,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:24,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:24,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:24,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:24,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:24,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:24,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:24,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:24,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:24,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:24,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:24,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:24,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:24,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:24,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:24,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:24,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:24,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:18:24,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552466483] [2020-10-28 09:18:24,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:24,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:18:24,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202966236] [2020-10-28 09:18:24,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:18:24,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:24,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:18:24,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:18:24,071 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 14 states. [2020-10-28 09:18:24,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:24,781 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-10-28 09:18:24,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:18:24,783 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-28 09:18:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:24,788 INFO L225 Difference]: With dead ends: 49 [2020-10-28 09:18:24,788 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 09:18:24,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:18:24,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 09:18:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-10-28 09:18:24,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 09:18:24,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-28 09:18:24,801 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 31 [2020-10-28 09:18:24,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:24,801 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-28 09:18:24,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:18:24,802 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-28 09:18:24,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:18:24,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:24,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:24,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:18:24,803 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:24,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:24,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1617779857, now seen corresponding path program 1 times [2020-10-28 09:18:24,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:24,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074588787] [2020-10-28 09:18:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:24,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:24,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:24,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:25,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:26,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:26,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:18:26,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:18:26,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1518 [2020-10-28 09:18:26,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:26,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:26,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:18:26,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:18:26,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:18:26,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:26,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:26,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:26,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:26,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:26,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:26,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:18:26,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:26,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:26,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:26,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:26,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:26,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:26,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:26,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:26,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:26,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:26,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:26,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:26,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:26,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:26,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:26,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:26,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:26,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:18:26,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074588787] [2020-10-28 09:18:26,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:26,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:18:26,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460771020] [2020-10-28 09:18:26,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:18:26,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:26,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:18:26,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:18:26,531 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-10-28 09:18:26,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:26,806 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-28 09:18:26,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:18:26,807 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-28 09:18:26,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:26,808 INFO L225 Difference]: With dead ends: 52 [2020-10-28 09:18:26,809 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 09:18:26,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:18:26,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 09:18:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 09:18:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 09:18:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-28 09:18:26,820 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 31 [2020-10-28 09:18:26,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:26,821 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-28 09:18:26,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:18:26,821 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-28 09:18:26,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:18:26,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:26,823 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:26,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:18:26,823 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:26,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:26,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1912294515, now seen corresponding path program 2 times [2020-10-28 09:18:26,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:26,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457545906] [2020-10-28 09:18:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:26,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:26,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:27,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:27,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 09:18:27,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:18:27,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-28 09:18:27,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:27,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:27,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:18:27,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:27,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:18:27,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:27,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:27,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:27,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:27,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:27,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:27,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:18:27,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:27,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:27,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:27,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:27,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:27,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:27,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:27,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:27,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:27,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:27,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:27,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:27,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:27,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:27,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:27,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:27,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:27,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:18:27,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457545906] [2020-10-28 09:18:27,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:27,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:18:27,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343345618] [2020-10-28 09:18:27,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:18:27,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:27,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:18:27,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:18:27,926 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2020-10-28 09:18:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:28,207 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-10-28 09:18:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:18:28,208 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-28 09:18:28,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:28,209 INFO L225 Difference]: With dead ends: 85 [2020-10-28 09:18:28,209 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:18:28,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:18:28,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:18:28,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2020-10-28 09:18:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 09:18:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-28 09:18:28,220 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 33 [2020-10-28 09:18:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:28,221 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-28 09:18:28,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:18:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-28 09:18:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 09:18:28,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:28,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:28,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:18:28,223 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:28,224 INFO L82 PathProgramCache]: Analyzing trace with hash 820807280, now seen corresponding path program 3 times [2020-10-28 09:18:28,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:28,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752922720] [2020-10-28 09:18:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:28,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:28,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:28,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:28,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:29,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:29,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:29,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:29,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:30,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:30,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:33,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:33,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 09:18:33,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:18:33,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:18:33,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:33,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:33,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:18:33,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:33,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:18:33,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:33,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:33,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:33,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:33,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:33,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:33,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:18:33,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:33,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:33,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:33,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:33,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:33,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:33,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:33,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:33,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:33,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:33,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:33,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:18:33,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:33,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:33,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 09:18:33,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752922720] [2020-10-28 09:18:33,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:33,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:18:33,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642697808] [2020-10-28 09:18:33,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:18:33,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:33,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:18:33,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:18:33,392 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-10-28 09:18:33,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:33,737 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-28 09:18:33,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:18:33,739 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-28 09:18:33,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:33,740 INFO L225 Difference]: With dead ends: 51 [2020-10-28 09:18:33,740 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 09:18:33,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:18:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 09:18:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-28 09:18:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 09:18:33,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-28 09:18:33,758 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 36 [2020-10-28 09:18:33,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:33,758 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-28 09:18:33,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:18:33,759 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-28 09:18:33,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:18:33,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:33,766 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:33,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:18:33,766 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:33,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:33,769 INFO L82 PathProgramCache]: Analyzing trace with hash -283658706, now seen corresponding path program 4 times [2020-10-28 09:18:33,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:33,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587192272] [2020-10-28 09:18:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:33,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:34,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:34,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:35,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:35,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:36,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:36,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:37,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:38,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:38,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:38,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:18:38,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:18:38,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:18:38,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:38,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:38,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:18:38,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:38,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:18:38,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:39,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:40,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:40,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:40,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:40,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:40,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:18:40,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:40,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:40,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:40,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:40,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:40,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:40,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:40,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:40,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:40,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:18:40,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:40,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:40,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:40,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:40,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:40,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:18:40,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587192272] [2020-10-28 09:18:40,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:40,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:18:40,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809702291] [2020-10-28 09:18:40,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:18:40,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:40,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:18:40,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:18:40,046 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 23 states. [2020-10-28 09:18:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:42,586 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-28 09:18:42,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:18:42,588 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2020-10-28 09:18:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:42,589 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:18:42,589 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 09:18:42,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:18:42,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 09:18:42,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-10-28 09:18:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 09:18:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-10-28 09:18:42,605 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 38 [2020-10-28 09:18:42,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:42,605 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-10-28 09:18:42,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:18:42,605 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-10-28 09:18:42,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:18:42,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:42,607 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:42,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:18:42,607 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:42,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:42,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1563522384, now seen corresponding path program 1 times [2020-10-28 09:18:42,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:42,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355292391] [2020-10-28 09:18:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:42,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:42,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:42,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:43,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:44,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:45,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:46,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:47,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:47,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:18:47,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:18:47,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:18:47,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:47,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:47,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:18:47,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:18:47,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:18:47,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:47,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:47,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:47,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:47,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:47,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:47,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 09:18:47,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:47,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:47,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:47,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:47,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:47,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:47,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:47,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:47,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:47,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:47,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:47,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:47,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:47,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:47,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:47,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:47,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:47,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:18:47,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355292391] [2020-10-28 09:18:47,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:47,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:18:47,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544612260] [2020-10-28 09:18:47,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:18:47,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:47,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:18:47,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:18:47,962 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 13 states. [2020-10-28 09:18:48,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:48,874 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-10-28 09:18:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:18:48,874 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-28 09:18:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:48,875 INFO L225 Difference]: With dead ends: 83 [2020-10-28 09:18:48,876 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 09:18:48,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:18:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 09:18:48,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 58. [2020-10-28 09:18:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 09:18:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-10-28 09:18:48,890 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 38 [2020-10-28 09:18:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:48,891 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-10-28 09:18:48,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:18:48,891 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-10-28 09:18:48,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:18:48,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:48,893 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:48,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:18:48,893 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:48,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:48,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2017163884, now seen corresponding path program 2 times [2020-10-28 09:18:48,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:48,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257962778] [2020-10-28 09:18:48,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:48,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:48,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:49,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:49,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:50,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:50,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:53,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:53,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:18:53,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:18:53,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4421 [2020-10-28 09:18:53,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:53,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:53,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:18:53,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:53,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:18:53,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:53,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:53,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:53,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:53,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:53,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:53,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:18:53,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:53,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:53,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:53,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:53,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:53,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:53,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:53,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:53,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:53,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:53,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:53,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:53,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:53,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:53,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:53,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:53,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:53,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 09:18:53,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257962778] [2020-10-28 09:18:53,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:53,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:18:53,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824864799] [2020-10-28 09:18:53,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:18:53,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:53,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:18:53,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:18:53,553 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 7 states. [2020-10-28 09:18:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:53,731 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-10-28 09:18:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:18:53,732 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-28 09:18:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:53,733 INFO L225 Difference]: With dead ends: 80 [2020-10-28 09:18:53,733 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 09:18:53,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:18:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 09:18:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 09:18:53,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 09:18:53,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-28 09:18:53,764 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 38 [2020-10-28 09:18:53,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:53,764 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-28 09:18:53,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:18:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-28 09:18:53,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 09:18:53,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:53,773 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:53,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:18:53,774 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:53,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:53,775 INFO L82 PathProgramCache]: Analyzing trace with hash -818549140, now seen corresponding path program 5 times [2020-10-28 09:18:53,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:53,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052485131] [2020-10-28 09:18:53,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:53,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:53,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:54,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:54,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 09:18:54,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:18:54,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1167 [2020-10-28 09:18:54,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:54,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:54,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:18:54,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:54,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:18:54,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:55,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:55,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:55,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:55,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:55,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:55,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:18:55,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:55,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:55,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:55,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:55,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:55,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:55,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:55,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:55,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:55,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:55,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:55,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:18:55,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:55,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:55,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:55,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:55,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:55,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 09:18:55,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052485131] [2020-10-28 09:18:55,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:55,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:18:55,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252902649] [2020-10-28 09:18:55,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:18:55,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:55,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:18:55,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:18:55,107 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 10 states. [2020-10-28 09:18:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:55,485 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2020-10-28 09:18:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:18:55,486 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-28 09:18:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:55,487 INFO L225 Difference]: With dead ends: 108 [2020-10-28 09:18:55,487 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 09:18:55,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:18:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 09:18:55,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 58. [2020-10-28 09:18:55,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 09:18:55,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-10-28 09:18:55,515 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2020-10-28 09:18:55,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:55,516 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-10-28 09:18:55,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:18:55,516 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-10-28 09:18:55,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 09:18:55,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:55,517 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:55,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:18:55,518 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:55,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:55,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1378355252, now seen corresponding path program 6 times [2020-10-28 09:18:55,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:55,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072885614] [2020-10-28 09:18:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:55,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:55,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:56,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:56,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:56,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:57,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:57,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:57,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:57,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:58,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:00,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:00,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 09:19:00,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:19:00,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:19:00,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:00,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:00,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:19:00,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:00,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:19:00,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:00,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:00,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:00,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:00,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:00,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:00,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:19:00,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:00,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:00,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:00,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:00,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:00,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:00,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:00,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:00,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:00,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:00,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:00,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:19:00,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:00,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:00,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:00,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:00,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:00,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 09:19:00,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072885614] [2020-10-28 09:19:00,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:00,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:19:00,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728009257] [2020-10-28 09:19:00,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:19:00,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:00,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:19:00,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:19:00,719 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 10 states. [2020-10-28 09:19:01,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:01,164 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-28 09:19:01,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:19:01,164 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-28 09:19:01,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:01,166 INFO L225 Difference]: With dead ends: 70 [2020-10-28 09:19:01,166 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:19:01,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:19:01,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:19:01,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-10-28 09:19:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 09:19:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-28 09:19:01,178 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 40 [2020-10-28 09:19:01,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:01,179 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-28 09:19:01,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:19:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-28 09:19:01,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:19:01,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:01,180 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:01,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:19:01,180 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:01,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:01,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1368274927, now seen corresponding path program 7 times [2020-10-28 09:19:01,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:01,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710721091] [2020-10-28 09:19:01,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:01,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:01,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:02,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:02,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:03,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:03,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:04,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:04,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:05,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:05,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:05,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:06,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:06,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:19:06,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:19:06,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:19:06,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:06,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:06,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:19:06,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:06,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:19:06,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:07,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:07,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:07,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:07,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:07,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:07,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:07,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:07,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:07,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:07,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:07,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:07,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:07,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:07,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:07,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:07,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:07,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:07,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:07,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:07,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:07,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:07,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:07,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:07,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:07,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710721091] [2020-10-28 09:19:07,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:07,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:19:07,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581933490] [2020-10-28 09:19:07,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:19:07,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:07,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:19:07,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:19:07,878 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 26 states. [2020-10-28 09:19:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:09,777 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-10-28 09:19:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:19:09,778 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 45 [2020-10-28 09:19:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:09,779 INFO L225 Difference]: With dead ends: 68 [2020-10-28 09:19:09,780 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 09:19:09,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:19:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 09:19:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-10-28 09:19:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 09:19:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-28 09:19:09,792 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 45 [2020-10-28 09:19:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:09,792 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-28 09:19:09,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:19:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-28 09:19:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:19:09,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:09,793 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:09,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:19:09,794 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:09,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:09,794 INFO L82 PathProgramCache]: Analyzing trace with hash -220072975, now seen corresponding path program 3 times [2020-10-28 09:19:09,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:09,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227504249] [2020-10-28 09:19:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:09,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:09,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:09,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:10,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:10,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:10,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:11,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:12,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:12,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:14,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:14,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:14,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:14,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:14,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:19:14,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:19:14,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:19:14,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:14,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:14,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:19:14,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:14,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:19:14,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:15,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:15,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:15,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:15,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:15,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:15,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:19:15,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:15,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:15,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:15,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:15,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:15,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:15,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:15,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:15,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:15,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:15,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:15,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:15,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:15,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:15,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:15,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:15,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:15,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:19:15,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227504249] [2020-10-28 09:19:15,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:15,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:19:15,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572778654] [2020-10-28 09:19:15,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:19:15,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:15,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:19:15,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:19:15,240 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 17 states. [2020-10-28 09:19:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:16,325 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-10-28 09:19:16,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:19:16,326 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-28 09:19:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:16,328 INFO L225 Difference]: With dead ends: 86 [2020-10-28 09:19:16,328 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 09:19:16,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:19:16,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 09:19:16,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2020-10-28 09:19:16,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 09:19:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-28 09:19:16,345 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 45 [2020-10-28 09:19:16,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:16,346 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-28 09:19:16,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:19:16,346 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-28 09:19:16,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:19:16,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:16,348 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:16,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:19:16,348 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:16,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:16,351 INFO L82 PathProgramCache]: Analyzing trace with hash 550626477, now seen corresponding path program 4 times [2020-10-28 09:19:16,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:16,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138923709] [2020-10-28 09:19:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:16,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:16,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:16,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:17,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:17,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:17,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:17,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:18,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:20,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:20,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:21,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:19:21,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:19:21,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:19:21,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:21,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:21,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:19:21,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:19:21,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:19:21,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:21,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:21,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:21,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:21,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:21,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:21,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:21,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:21,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:21,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:21,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:21,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:21,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:21,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:21,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:21,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:21,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:21,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:21,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:21,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 09:19:21,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138923709] [2020-10-28 09:19:21,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:21,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:19:21,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813157069] [2020-10-28 09:19:21,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:19:21,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:21,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:19:21,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:19:21,759 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 14 states. [2020-10-28 09:19:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:22,456 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-10-28 09:19:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:19:22,457 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-28 09:19:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:22,458 INFO L225 Difference]: With dead ends: 80 [2020-10-28 09:19:22,458 INFO L226 Difference]: Without dead ends: 62 [2020-10-28 09:19:22,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:19:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-28 09:19:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-28 09:19:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 09:19:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-28 09:19:22,484 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 45 [2020-10-28 09:19:22,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:22,485 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-28 09:19:22,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:19:22,488 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-10-28 09:19:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 09:19:22,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:22,489 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:22,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:19:22,489 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:22,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1846739949, now seen corresponding path program 8 times [2020-10-28 09:19:22,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:22,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307582506] [2020-10-28 09:19:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:22,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:22,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:24,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:24,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 09:19:24,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:24,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1733 [2020-10-28 09:19:24,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:24,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:24,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:19:24,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:24,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:19:24,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:24,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:24,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:24,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:24,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:24,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:24,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:19:24,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:24,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:24,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:24,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:24,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:24,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:24,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:24,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:24,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:24,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:24,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:24,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:24,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:24,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:24,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:24,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:24,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:24,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:19:24,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307582506] [2020-10-28 09:19:24,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:24,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:19:24,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40608084] [2020-10-28 09:19:24,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:19:24,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:24,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:19:24,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:19:24,395 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 12 states. [2020-10-28 09:19:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:24,855 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2020-10-28 09:19:24,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:19:24,855 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-28 09:19:24,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:24,857 INFO L225 Difference]: With dead ends: 138 [2020-10-28 09:19:24,857 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 09:19:24,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:19:24,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 09:19:24,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 59. [2020-10-28 09:19:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 09:19:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-28 09:19:24,868 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 47 [2020-10-28 09:19:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:24,869 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-28 09:19:24,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:19:24,869 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-28 09:19:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 09:19:24,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:24,871 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:24,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:19:24,872 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:24,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:24,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2062803320, now seen corresponding path program 9 times [2020-10-28 09:19:24,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:24,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726892709] [2020-10-28 09:19:24,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:24,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:24,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:24,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:26,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:27,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:27,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:27,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:27,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:27,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:27,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:28,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:28,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:28,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:28,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:28,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:28,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:29,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 09:19:29,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-28 09:19:29,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:19:29,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:29,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:29,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:19:29,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:29,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:19:29,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:30,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:30,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:30,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:30,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:30,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:30,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:30,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:30,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:30,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:30,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:30,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:30,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:30,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:30,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:30,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:30,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:30,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:30,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:30,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:30,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:30,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:30,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:30,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:30,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 09:19:30,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726892709] [2020-10-28 09:19:30,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:30,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:19:30,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965999016] [2020-10-28 09:19:30,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:19:30,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:30,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:19:30,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:19:30,084 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 12 states. [2020-10-28 09:19:30,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:30,733 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2020-10-28 09:19:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:19:30,734 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-28 09:19:30,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:30,735 INFO L225 Difference]: With dead ends: 73 [2020-10-28 09:19:30,735 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 09:19:30,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:19:30,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 09:19:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2020-10-28 09:19:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 09:19:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-28 09:19:30,750 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 50 [2020-10-28 09:19:30,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:30,751 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-28 09:19:30,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:19:30,751 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-28 09:19:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:19:30,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:30,752 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:30,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:19:30,752 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:30,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1179539386, now seen corresponding path program 10 times [2020-10-28 09:19:30,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:30,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653622043] [2020-10-28 09:19:30,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:30,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:31,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:31,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:32,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:32,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:33,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:33,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:35,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:35,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:35,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:19:35,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:19:35,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:19:35,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:35,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:35,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:19:35,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:35,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:19:35,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:36,620 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-28 09:19:36,842 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-28 09:19:38,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:38,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:38,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:38,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:38,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:38,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:19:38,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:38,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:38,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:38,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:38,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:38,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:38,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:38,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:38,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:38,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:38,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:38,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:38,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:38,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:38,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:38,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:38,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:38,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:19:38,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653622043] [2020-10-28 09:19:38,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:38,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:19:38,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523679106] [2020-10-28 09:19:38,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:19:38,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:38,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:19:38,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:19:38,430 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 30 states. [2020-10-28 09:19:39,262 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-28 09:19:40,814 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-28 09:19:41,038 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-28 09:19:41,705 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 107 [2020-10-28 09:19:43,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:43,050 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2020-10-28 09:19:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:19:43,051 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 52 [2020-10-28 09:19:43,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:43,052 INFO L225 Difference]: With dead ends: 81 [2020-10-28 09:19:43,052 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 09:19:43,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=223, Invalid=2429, Unknown=0, NotChecked=0, Total=2652 [2020-10-28 09:19:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 09:19:43,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-28 09:19:43,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 09:19:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-28 09:19:43,067 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 52 [2020-10-28 09:19:43,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:43,067 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-28 09:19:43,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:19:43,067 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-28 09:19:43,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:19:43,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:43,068 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:43,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:19:43,069 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:43,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:43,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1426484168, now seen corresponding path program 5 times [2020-10-28 09:19:43,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:43,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019886298] [2020-10-28 09:19:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:43,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:43,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:43,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:43,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:43,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:43,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:43,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:43,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:43,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:43,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:44,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:45,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:47,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:47,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:48,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:48,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:19:48,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 09:19:48,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:19:48,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:48,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:19:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:19:48,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:48,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:48,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:48,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:48,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:48,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:48,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:48,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:48,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:48,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:48,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:48,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:48,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:48,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:48,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:48,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:48,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:48,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:48,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:48,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:48,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:48,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:48,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:48,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019886298] [2020-10-28 09:19:48,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:48,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:19:48,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090693173] [2020-10-28 09:19:48,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:19:48,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:48,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:19:48,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:19:48,667 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 21 states. [2020-10-28 09:19:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:50,120 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2020-10-28 09:19:50,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:19:50,122 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-28 09:19:50,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:50,124 INFO L225 Difference]: With dead ends: 137 [2020-10-28 09:19:50,124 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 09:19:50,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:19:50,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 09:19:50,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 83. [2020-10-28 09:19:50,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:19:50,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-10-28 09:19:50,141 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 52 [2020-10-28 09:19:50,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:50,141 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-10-28 09:19:50,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:19:50,141 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-10-28 09:19:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:19:50,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:50,142 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:50,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:19:50,143 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:50,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash -960684668, now seen corresponding path program 6 times [2020-10-28 09:19:50,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:50,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448969878] [2020-10-28 09:19:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:50,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:50,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:50,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:50,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:50,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:51,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:51,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:52,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:52,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:55,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:19:55,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:19:55,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:19:55,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:55,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:55,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:19:55,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:19:55,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:19:55,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:55,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:55,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:55,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:55,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:55,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:19:55,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:55,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:55,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:55,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:55,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:55,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:55,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:55,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:55,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:55,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:55,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:55,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:55,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:55,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:55,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:55,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:55,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:19:55,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448969878] [2020-10-28 09:19:55,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:55,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:19:55,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970223420] [2020-10-28 09:19:55,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:19:55,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:55,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:19:55,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:19:55,954 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 18 states. [2020-10-28 09:19:56,536 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-28 09:19:57,347 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-28 09:19:58,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:58,019 INFO L93 Difference]: Finished difference Result 132 states and 151 transitions. [2020-10-28 09:19:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:19:58,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-28 09:19:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:58,021 INFO L225 Difference]: With dead ends: 132 [2020-10-28 09:19:58,021 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 09:19:58,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:19:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 09:19:58,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 83. [2020-10-28 09:19:58,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:19:58,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-10-28 09:19:58,042 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 52 [2020-10-28 09:19:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:58,043 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-10-28 09:19:58,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:19:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-10-28 09:19:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:19:58,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:58,048 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:58,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:19:58,049 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:58,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:58,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1038990776, now seen corresponding path program 7 times [2020-10-28 09:19:58,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:58,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792350549] [2020-10-28 09:19:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:58,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:01,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:01,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:01,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:03,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:03,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:20:03,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:20:03,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:20:03,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:03,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:03,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:20:03,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:20:03,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:20:03,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:03,341 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-28 09:20:03,600 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-10-28 09:20:03,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:03,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:03,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:03,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:03,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:03,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:03,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:03,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:03,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:03,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:03,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:03,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:03,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:03,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:03,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:03,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:03,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:03,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:03,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:03,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:03,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:03,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:03,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:03,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 09:20:03,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792350549] [2020-10-28 09:20:03,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:03,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:20:03,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971834113] [2020-10-28 09:20:03,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:20:03,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:03,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:20:03,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:20:03,958 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 17 states. [2020-10-28 09:20:05,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:05,118 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2020-10-28 09:20:05,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:20:05,119 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-28 09:20:05,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:05,120 INFO L225 Difference]: With dead ends: 119 [2020-10-28 09:20:05,121 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 09:20:05,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:20:05,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 09:20:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2020-10-28 09:20:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 09:20:05,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2020-10-28 09:20:05,135 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 52 [2020-10-28 09:20:05,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:05,135 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2020-10-28 09:20:05,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:20:05,135 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2020-10-28 09:20:05,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:20:05,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:05,136 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:05,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:20:05,136 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:05,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:05,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1528543876, now seen corresponding path program 11 times [2020-10-28 09:20:05,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:05,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631118150] [2020-10-28 09:20:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:05,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:05,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:07,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:07,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 09:20:07,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:07,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2721 [2020-10-28 09:20:07,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:07,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:07,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:20:07,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:07,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:20:07,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:08,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:08,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:08,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:08,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:08,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:08,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:08,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:08,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:08,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:08,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:08,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:08,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:08,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:08,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:08,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:08,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:08,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:08,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:08,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:08,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:08,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:08,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:08,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:08,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 09:20:08,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631118150] [2020-10-28 09:20:08,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:08,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:20:08,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262006431] [2020-10-28 09:20:08,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:20:08,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:08,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:20:08,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:20:08,050 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 14 states. [2020-10-28 09:20:08,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:08,527 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2020-10-28 09:20:08,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:20:08,527 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-28 09:20:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:08,528 INFO L225 Difference]: With dead ends: 132 [2020-10-28 09:20:08,529 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 09:20:08,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:20:08,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 09:20:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-10-28 09:20:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:20:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-28 09:20:08,547 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 54 [2020-10-28 09:20:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:08,547 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-28 09:20:08,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:20:08,547 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-28 09:20:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:20:08,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:08,548 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:08,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:20:08,548 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1364016719, now seen corresponding path program 12 times [2020-10-28 09:20:08,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:08,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937016440] [2020-10-28 09:20:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:08,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:08,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:10,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:11,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:13,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:20:13,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:20:13,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:20:13,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:13,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:13,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:20:13,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:13,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 09:20:13,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:14,263 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-28 09:20:14,415 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-28 09:20:14,586 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-28 09:20:14,808 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-28 09:20:14,989 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-28 09:20:15,217 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-28 09:20:15,416 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-10-28 09:20:15,717 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-10-28 09:20:15,942 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-28 09:20:16,175 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-28 09:20:16,380 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-28 09:20:16,701 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-28 09:20:16,933 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-28 09:20:17,183 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-28 09:20:17,405 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-28 09:20:17,643 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-28 09:20:17,854 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-28 09:20:18,068 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-28 09:20:18,291 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-28 09:20:18,510 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-28 09:20:18,735 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-28 09:20:19,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:19,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:19,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:19,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:19,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:19,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:19,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:19,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:19,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:19,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:19,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:19,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:19,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:19,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:19,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:19,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:19,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:19,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:19,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:19,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:19,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:19,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:19,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:19,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:19,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937016440] [2020-10-28 09:20:19,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:19,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 09:20:19,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789640523] [2020-10-28 09:20:19,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 09:20:19,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:19,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 09:20:19,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:20:19,826 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 39 states. [2020-10-28 09:20:20,745 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-28 09:20:21,294 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-28 09:20:21,502 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-28 09:20:22,022 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-28 09:20:22,321 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-28 09:20:22,668 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-28 09:20:22,971 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-28 09:20:23,231 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-28 09:20:23,573 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-10-28 09:20:23,817 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-28 09:20:24,321 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-28 09:20:24,624 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-28 09:20:25,265 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2020-10-28 09:20:25,609 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-10-28 09:20:27,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:27,343 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2020-10-28 09:20:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 09:20:27,345 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 59 [2020-10-28 09:20:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:27,347 INFO L225 Difference]: With dead ends: 101 [2020-10-28 09:20:27,347 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 09:20:27,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=326, Invalid=3964, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 09:20:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 09:20:27,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-10-28 09:20:27,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 09:20:27,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2020-10-28 09:20:27,364 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 59 [2020-10-28 09:20:27,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:27,364 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2020-10-28 09:20:27,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 09:20:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2020-10-28 09:20:27,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:20:27,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:27,365 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:27,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:20:27,366 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:27,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:27,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1786718545, now seen corresponding path program 8 times [2020-10-28 09:20:27,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:27,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579576046] [2020-10-28 09:20:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:27,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:27,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:27,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:27,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:27,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:27,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:29,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:29,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:29,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:30,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:30,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:30,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:32,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:32,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:32,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:32,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:32,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:20:32,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 09:20:32,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 09:20:32,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:32,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:32,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:20:32,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:32,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:20:32,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:32,976 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-10-28 09:20:33,135 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2020-10-28 09:20:33,356 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-10-28 09:20:33,603 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-10-28 09:20:33,771 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-28 09:20:33,933 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-28 09:20:34,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:34,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:34,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:34,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:34,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:34,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:34,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:34,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:34,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:34,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:34,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:34,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:34,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:34,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:34,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:34,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:34,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:34,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:34,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:34,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:34,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:34,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:34,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:34,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 09:20:34,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579576046] [2020-10-28 09:20:34,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:34,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:20:34,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767597889] [2020-10-28 09:20:34,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:20:34,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:34,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:20:34,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:20:34,623 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 23 states. [2020-10-28 09:20:35,736 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-28 09:20:35,972 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-28 09:20:36,144 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-28 09:20:36,599 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-28 09:20:36,860 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-28 09:20:37,133 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2020-10-28 09:20:37,328 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-28 09:20:37,562 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-28 09:20:37,745 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-10-28 09:20:38,521 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-28 09:20:38,873 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-28 09:20:39,058 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2020-10-28 09:20:39,411 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-10-28 09:20:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:39,780 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2020-10-28 09:20:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 09:20:39,781 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-10-28 09:20:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:39,782 INFO L225 Difference]: With dead ends: 109 [2020-10-28 09:20:39,782 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 09:20:39,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=581, Invalid=2281, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 09:20:39,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 09:20:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-10-28 09:20:39,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:20:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-10-28 09:20:39,807 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 59 [2020-10-28 09:20:39,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:39,808 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-10-28 09:20:39,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:20:39,808 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-10-28 09:20:39,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:20:39,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:39,809 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:39,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:20:39,809 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1230003213, now seen corresponding path program 9 times [2020-10-28 09:20:39,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:39,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973451607] [2020-10-28 09:20:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:39,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:39,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:39,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:40,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:40,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:40,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:42,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:42,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:44,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:44,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:44,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:44,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:20:44,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 09:20:44,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:20:44,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:44,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:44,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:20:44,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 09:20:44,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:20:44,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:45,133 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2020-10-28 09:20:45,342 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2020-10-28 09:20:45,548 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2020-10-28 09:20:46,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:46,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:46,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:46,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:46,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:46,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:46,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:46,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:46,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:46,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:46,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:46,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:46,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:46,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:46,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:46,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:46,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:46,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:46,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:46,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:46,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:46,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:46,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:46,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 09:20:46,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973451607] [2020-10-28 09:20:46,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:46,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:20:46,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737101664] [2020-10-28 09:20:46,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:20:46,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:46,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:20:46,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:20:46,048 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 20 states. [2020-10-28 09:20:46,605 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-10-28 09:20:47,549 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-28 09:20:48,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:48,207 INFO L93 Difference]: Finished difference Result 119 states and 137 transitions. [2020-10-28 09:20:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:20:48,208 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-28 09:20:48,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:48,209 INFO L225 Difference]: With dead ends: 119 [2020-10-28 09:20:48,209 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 09:20:48,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:20:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 09:20:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-28 09:20:48,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 09:20:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2020-10-28 09:20:48,227 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 59 [2020-10-28 09:20:48,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:48,228 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2020-10-28 09:20:48,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:20:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2020-10-28 09:20:48,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:20:48,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:48,229 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:48,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:20:48,229 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:48,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:48,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1007722543, now seen corresponding path program 10 times [2020-10-28 09:20:48,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:48,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812480129] [2020-10-28 09:20:48,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:48,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:48,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:48,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:49,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:49,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:52,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:53,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:53,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:20:53,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:20:53,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:20:53,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:53,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:53,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:20:53,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:53,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:20:53,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:54,014 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2020-10-28 09:20:54,159 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2020-10-28 09:20:54,311 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2020-10-28 09:20:54,520 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-28 09:20:54,668 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-28 09:20:54,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:54,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:54,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:54,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:54,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:54,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:54,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:54,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:54,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:54,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:54,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:54,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:54,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:54,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:54,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:54,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:54,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:54,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:54,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:54,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:54,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:54,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:54,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:54,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 09:20:54,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812480129] [2020-10-28 09:20:54,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:54,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:20:54,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90514712] [2020-10-28 09:20:54,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:20:54,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:54,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:20:54,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:20:54,986 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 21 states. [2020-10-28 09:20:56,554 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-28 09:20:56,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:56,763 INFO L93 Difference]: Finished difference Result 177 states and 217 transitions. [2020-10-28 09:20:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:20:56,768 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-28 09:20:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:56,770 INFO L225 Difference]: With dead ends: 177 [2020-10-28 09:20:56,770 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 09:20:56,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:20:56,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 09:20:56,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2020-10-28 09:20:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 09:20:56,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 144 transitions. [2020-10-28 09:20:56,798 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 144 transitions. Word has length 59 [2020-10-28 09:20:56,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:56,798 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 144 transitions. [2020-10-28 09:20:56,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:20:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 144 transitions. [2020-10-28 09:20:56,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:20:56,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:56,799 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:56,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:20:56,800 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:56,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:56,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1386648973, now seen corresponding path program 11 times [2020-10-28 09:20:56,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:56,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566756412] [2020-10-28 09:20:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:56,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:56,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:57,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:57,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:57,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:57,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:57,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:58,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:58,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:58,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:59,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:01,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:01,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:01,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:01,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:21:01,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:21:01,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:21:01,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:01,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:21:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:01,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:21:01,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:01,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:01,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:01,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:01,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:01,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:01,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:01,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:01,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:01,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:01,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:01,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:01,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:01,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:02,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:02,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:02,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:02,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:02,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:02,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:02,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:02,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:02,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:02,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:02,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-28 09:21:02,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566756412] [2020-10-28 09:21:02,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:02,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:21:02,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540551650] [2020-10-28 09:21:02,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:21:02,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:02,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:21:02,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:21:02,012 INFO L87 Difference]: Start difference. First operand 120 states and 144 transitions. Second operand 9 states. [2020-10-28 09:21:02,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:02,391 INFO L93 Difference]: Finished difference Result 166 states and 198 transitions. [2020-10-28 09:21:02,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:21:02,392 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-28 09:21:02,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:02,394 INFO L225 Difference]: With dead ends: 166 [2020-10-28 09:21:02,394 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 09:21:02,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:21:02,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 09:21:02,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-10-28 09:21:02,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 09:21:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2020-10-28 09:21:02,413 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 59 [2020-10-28 09:21:02,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:02,413 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2020-10-28 09:21:02,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:21:02,413 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2020-10-28 09:21:02,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:21:02,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:02,414 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:02,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:21:02,414 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:02,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:02,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1206194957, now seen corresponding path program 12 times [2020-10-28 09:21:02,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:02,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414437782] [2020-10-28 09:21:02,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:02,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:02,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:02,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:03,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:04,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:06,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:06,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:07,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:07,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 09:21:07,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:21:07,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:21:07,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:07,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:07,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:21:07,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:07,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 09:21:07,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:07,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:07,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:07,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:07,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:07,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:07,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:21:07,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:07,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:07,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:07,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:07,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:07,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:21:07,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:07,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:07,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:07,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:07,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:07,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:07,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:07,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:07,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:07,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:07,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:07,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-28 09:21:07,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414437782] [2020-10-28 09:21:07,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:07,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:21:07,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196088363] [2020-10-28 09:21:07,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:21:07,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:07,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:21:07,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:21:07,741 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand 16 states. [2020-10-28 09:21:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:08,817 INFO L93 Difference]: Finished difference Result 146 states and 165 transitions. [2020-10-28 09:21:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:21:08,818 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-28 09:21:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:08,819 INFO L225 Difference]: With dead ends: 146 [2020-10-28 09:21:08,820 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 09:21:08,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:21:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 09:21:08,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 79. [2020-10-28 09:21:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 09:21:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-10-28 09:21:08,836 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 61 [2020-10-28 09:21:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:08,837 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-10-28 09:21:08,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:21:08,837 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-10-28 09:21:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 09:21:08,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:08,837 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:08,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:21:08,838 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:08,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:08,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1414625216, now seen corresponding path program 13 times [2020-10-28 09:21:08,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:08,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950433781] [2020-10-28 09:21:08,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:08,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:08,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:08,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:09,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:09,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:09,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:09,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:09,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:09,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:10,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:10,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:10,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:13,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:13,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 09:21:13,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:21:13,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:21:13,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:13,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:13,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:21:13,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:13,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:21:13,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:14,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:14,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:14,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:14,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:14,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:14,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:21:14,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:14,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:14,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:14,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:14,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:14,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:14,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:14,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:14,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:14,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:14,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:14,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:14,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:14,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:14,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:14,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:14,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:14,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-28 09:21:14,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950433781] [2020-10-28 09:21:14,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:14,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:21:14,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251097954] [2020-10-28 09:21:14,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:21:14,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:14,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:21:14,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:21:14,101 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 16 states. [2020-10-28 09:21:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:14,691 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2020-10-28 09:21:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:21:14,692 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-10-28 09:21:14,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:14,693 INFO L225 Difference]: With dead ends: 120 [2020-10-28 09:21:14,694 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 09:21:14,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:21:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 09:21:14,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-10-28 09:21:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:21:14,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-28 09:21:14,713 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 64 [2020-10-28 09:21:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:14,713 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-28 09:21:14,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:21:14,713 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-28 09:21:14,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:21:14,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:14,714 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:14,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:21:14,714 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:14,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:14,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1874321502, now seen corresponding path program 14 times [2020-10-28 09:21:14,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:14,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369917074] [2020-10-28 09:21:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:14,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:15,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:17,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:19,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:19,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:21:19,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:21:19,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:21:19,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:19,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:19,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 09:21:19,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:19,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:21:19,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:20,247 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-28 09:21:20,375 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-10-28 09:21:20,530 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-28 09:21:20,731 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-28 09:21:20,901 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-28 09:21:21,126 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-28 09:21:21,393 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2020-10-28 09:21:21,601 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2020-10-28 09:21:21,883 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2020-10-28 09:21:22,176 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 65 [2020-10-28 09:21:22,431 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-28 09:21:22,736 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-10-28 09:21:23,073 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2020-10-28 09:21:23,346 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2020-10-28 09:21:23,582 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-28 09:21:23,778 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-28 09:21:23,964 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-28 09:21:24,152 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-28 09:21:24,396 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-28 09:21:24,613 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-28 09:21:24,844 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-28 09:21:25,058 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-28 09:21:25,292 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2020-10-28 09:21:26,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:26,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:26,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:26,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:26,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:26,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:26,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:26,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:26,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:26,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:26,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:26,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:26,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:26,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:26,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:26,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:26,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:26,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:26,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:26,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:26,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:26,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:26,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:26,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 78 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 09:21:27,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369917074] [2020-10-28 09:21:27,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:27,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 09:21:27,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205505924] [2020-10-28 09:21:27,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 09:21:27,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:27,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 09:21:27,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:21:27,035 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 41 states. [2020-10-28 09:21:27,926 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-28 09:21:28,949 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-28 09:21:29,155 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-28 09:21:29,466 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-28 09:21:29,660 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-28 09:21:30,179 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-10-28 09:21:30,362 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-28 09:21:30,616 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-28 09:21:31,006 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-28 09:21:31,220 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-28 09:21:31,804 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2020-10-28 09:21:32,042 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-10-28 09:21:32,312 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-28 09:21:32,742 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2020-10-28 09:21:33,032 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-10-28 09:21:33,296 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-10-28 09:21:33,565 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-28 09:21:33,962 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2020-10-28 09:21:34,428 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-28 09:21:34,638 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-28 09:21:34,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:34,992 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2020-10-28 09:21:34,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-28 09:21:34,993 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 66 [2020-10-28 09:21:34,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:34,994 INFO L225 Difference]: With dead ends: 108 [2020-10-28 09:21:34,994 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 09:21:34,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=588, Invalid=5112, Unknown=0, NotChecked=0, Total=5700 [2020-10-28 09:21:34,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 09:21:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-10-28 09:21:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 09:21:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-10-28 09:21:35,017 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 66 [2020-10-28 09:21:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:35,017 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-10-28 09:21:35,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 09:21:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-10-28 09:21:35,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:21:35,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:35,018 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:35,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:21:35,018 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:35,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:35,019 INFO L82 PathProgramCache]: Analyzing trace with hash 68883168, now seen corresponding path program 13 times [2020-10-28 09:21:35,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:35,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179192609] [2020-10-28 09:21:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:35,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:35,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:35,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:35,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:35,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:36,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:36,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:36,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:36,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:36,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:36,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:37,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:38,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:38,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:38,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:38,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:38,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:38,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:38,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:40,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:40,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:21:40,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-28 09:21:40,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:21:40,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:40,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:40,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:21:40,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:40,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:21:40,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:40,307 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2020-10-28 09:21:40,707 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2020-10-28 09:21:40,864 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-28 09:21:41,045 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-28 09:21:41,213 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-10-28 09:21:41,381 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-28 09:21:41,729 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-10-28 09:21:41,940 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-10-28 09:21:42,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:42,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:42,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:42,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:42,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:42,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:42,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:42,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:42,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:42,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:42,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:42,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:42,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:42,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:42,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:42,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:42,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:42,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:42,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:42,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:42,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:42,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:42,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:42,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 09:21:42,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179192609] [2020-10-28 09:21:42,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:42,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:21:42,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769640092] [2020-10-28 09:21:42,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:21:42,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:42,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:21:42,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:21:42,351 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 23 states. [2020-10-28 09:21:43,136 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-28 09:21:43,692 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-28 09:21:43,873 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-28 09:21:44,176 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-10-28 09:21:44,479 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-28 09:21:45,181 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-28 09:21:45,470 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-28 09:21:45,628 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-10-28 09:21:45,775 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-28 09:21:46,079 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-28 09:21:46,259 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-28 09:21:46,730 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55