/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/psyco/psyco_abp_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 17:11:29,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 17:11:29,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 17:11:29,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 17:11:29,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 17:11:29,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 17:11:29,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 17:11:29,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 17:11:29,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 17:11:29,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 17:11:29,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 17:11:29,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 17:11:29,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 17:11:29,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 17:11:29,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 17:11:29,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 17:11:29,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 17:11:29,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 17:11:29,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 17:11:29,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 17:11:29,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 17:11:29,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 17:11:29,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 17:11:29,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 17:11:29,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 17:11:29,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 17:11:29,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 17:11:29,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 17:11:29,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 17:11:29,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 17:11:29,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 17:11:29,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 17:11:29,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 17:11:29,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 17:11:29,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 17:11:29,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 17:11:29,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 17:11:29,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 17:11:29,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 17:11:29,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 17:11:29,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 17:11:29,797 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 17:11:29,854 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 17:11:29,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 17:11:29,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 17:11:29,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 17:11:29,859 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 17:11:29,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 17:11:29,860 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 17:11:29,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 17:11:29,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 17:11:29,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 17:11:29,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 17:11:29,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 17:11:29,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 17:11:29,862 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 17:11:29,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 17:11:29,863 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 17:11:29,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 17:11:29,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 17:11:29,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 17:11:29,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 17:11:29,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 17:11:29,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 17:11:29,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 17:11:29,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 17:11:29,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 17:11:29,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 17:11:29,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 17:11:29,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 17:11:29,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 17:11:29,866 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 17:11:30,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 17:11:30,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 17:11:30,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 17:11:30,337 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 17:11:30,338 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 17:11:30,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2020-10-28 17:11:30,440 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efedc01c3/3e2fa79b76b04bffb128ea8dcea7fb5c/FLAGd0de107e5 [2020-10-28 17:11:31,133 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 17:11:31,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2020-10-28 17:11:31,159 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efedc01c3/3e2fa79b76b04bffb128ea8dcea7fb5c/FLAGd0de107e5 [2020-10-28 17:11:31,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efedc01c3/3e2fa79b76b04bffb128ea8dcea7fb5c [2020-10-28 17:11:31,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 17:11:31,459 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 17:11:31,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 17:11:31,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 17:11:31,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 17:11:31,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:11:31" (1/1) ... [2020-10-28 17:11:31,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13f78def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:11:31, skipping insertion in model container [2020-10-28 17:11:31,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:11:31" (1/1) ... [2020-10-28 17:11:31,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 17:11:31,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 17:11:31,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:11:31,840 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 17:11:31,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:11:31,987 INFO L208 MainTranslator]: Completed translation [2020-10-28 17:11:31,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:11:31 WrapperNode [2020-10-28 17:11:31,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 17:11:31,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 17:11:31,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 17:11:31,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 17:11:32,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:11:31" (1/1) ... [2020-10-28 17:11:32,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:11:31" (1/1) ... [2020-10-28 17:11:32,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:11:31" (1/1) ... [2020-10-28 17:11:32,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:11:31" (1/1) ... [2020-10-28 17:11:32,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:11:31" (1/1) ... [2020-10-28 17:11:32,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:11:31" (1/1) ... [2020-10-28 17:11:32,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:11:31" (1/1) ... [2020-10-28 17:11:32,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 17:11:32,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 17:11:32,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 17:11:32,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 17:11:32,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:11:31" (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 17:11:32,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 17:11:32,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 17:11:32,200 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 17:11:32,200 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 17:11:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 17:11:32,200 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 17:11:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 17:11:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 17:11:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 17:11:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 17:11:32,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 17:11:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 17:11:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 17:11:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 17:11:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 17:11:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 17:11:33,184 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 17:11:33,185 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 17:11:33,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:11:33 BoogieIcfgContainer [2020-10-28 17:11:33,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 17:11:33,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 17:11:33,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 17:11:33,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 17:11:33,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 05:11:31" (1/3) ... [2020-10-28 17:11:33,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424a165e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:11:33, skipping insertion in model container [2020-10-28 17:11:33,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:11:31" (2/3) ... [2020-10-28 17:11:33,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424a165e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:11:33, skipping insertion in model container [2020-10-28 17:11:33,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:11:33" (3/3) ... [2020-10-28 17:11:33,199 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-1.c [2020-10-28 17:11:33,214 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 17:11:33,220 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 17:11:33,235 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 17:11:33,267 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 17:11:33,268 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 17:11:33,268 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 17:11:33,268 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 17:11:33,268 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 17:11:33,268 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 17:11:33,268 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 17:11:33,269 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 17:11:33,297 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states. [2020-10-28 17:11:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 17:11:33,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:33,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:11:33,308 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:33,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:33,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1814028682, now seen corresponding path program 1 times [2020-10-28 17:11:33,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:33,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435547001] [2020-10-28 17:11:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:33,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:33,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:33,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:33,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 17:11:33,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:11:33,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-28 17:11:33,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:33,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:33,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:33,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:11:33,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:33,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 17:11:33,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:33,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:33,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:33,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:33,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:33,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 17:11:33,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:33,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:33,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:33,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:33,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:33,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:11:33,996 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 17:11:33,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435547001] [2020-10-28 17:11:33,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:11:33,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 17:11:34,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612635870] [2020-10-28 17:11:34,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 17:11:34,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:34,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 17:11:34,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 17:11:34,024 INFO L87 Difference]: Start difference. First operand 119 states. Second operand 3 states. [2020-10-28 17:11:34,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:34,136 INFO L93 Difference]: Finished difference Result 229 states and 432 transitions. [2020-10-28 17:11:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 17:11:34,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-28 17:11:34,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:34,155 INFO L225 Difference]: With dead ends: 229 [2020-10-28 17:11:34,156 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 17:11:34,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 17:11:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 17:11:34,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-28 17:11:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 17:11:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 182 transitions. [2020-10-28 17:11:34,227 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 182 transitions. Word has length 15 [2020-10-28 17:11:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:34,228 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 182 transitions. [2020-10-28 17:11:34,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 17:11:34,228 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 182 transitions. [2020-10-28 17:11:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 17:11:34,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:34,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:11:34,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 17:11:34,230 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash -272448032, now seen corresponding path program 1 times [2020-10-28 17:11:34,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:34,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762686600] [2020-10-28 17:11:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:34,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:34,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:34,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:34,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:34,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 17:11:34,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:11:34,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-28 17:11:34,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:34,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:34,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:11:34,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:11:34,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 17:11:34,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:34,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:34,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:34,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:34,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:34,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:34,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 17:11:34,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:34,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:34,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:34,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:34,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:34,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:34,620 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 17:11:34,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762686600] [2020-10-28 17:11:34,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:11:34,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:11:34,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169637639] [2020-10-28 17:11:34,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:11:34,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:11:34,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:11:34,624 INFO L87 Difference]: Start difference. First operand 111 states and 182 transitions. Second operand 4 states. [2020-10-28 17:11:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:35,211 INFO L93 Difference]: Finished difference Result 225 states and 374 transitions. [2020-10-28 17:11:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:11:35,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 17:11:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:35,214 INFO L225 Difference]: With dead ends: 225 [2020-10-28 17:11:35,214 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 17:11:35,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:35,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 17:11:35,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-28 17:11:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 17:11:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 193 transitions. [2020-10-28 17:11:35,233 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 193 transitions. Word has length 16 [2020-10-28 17:11:35,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:35,234 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 193 transitions. [2020-10-28 17:11:35,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:11:35,234 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 193 transitions. [2020-10-28 17:11:35,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 17:11:35,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:35,236 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] [2020-10-28 17:11:35,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 17:11:35,236 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:35,237 INFO L82 PathProgramCache]: Analyzing trace with hash -651907819, now seen corresponding path program 1 times [2020-10-28 17:11:35,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:35,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354441862] [2020-10-28 17:11:35,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:35,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:35,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:35,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:35,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 17:11:35,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:11:35,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-28 17:11:35,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:35,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:35,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:11:35,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:11:35,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 17:11:35,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:11:35,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:35,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:35,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:35,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:35,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:35,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 17:11:35,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:35,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:35,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:35,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:35,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:35,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 17:11:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 17:11:35,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354441862] [2020-10-28 17:11:35,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:11:35,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:11:35,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198774686] [2020-10-28 17:11:35,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:11:35,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:35,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:11:35,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:11:35,566 INFO L87 Difference]: Start difference. First operand 120 states and 193 transitions. Second operand 4 states. [2020-10-28 17:11:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:36,173 INFO L93 Difference]: Finished difference Result 346 states and 566 transitions. [2020-10-28 17:11:36,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:11:36,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-28 17:11:36,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:36,177 INFO L225 Difference]: With dead ends: 346 [2020-10-28 17:11:36,178 INFO L226 Difference]: Without dead ends: 224 [2020-10-28 17:11:36,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:36,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-28 17:11:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 201. [2020-10-28 17:11:36,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-28 17:11:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 336 transitions. [2020-10-28 17:11:36,213 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 336 transitions. Word has length 22 [2020-10-28 17:11:36,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:36,214 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 336 transitions. [2020-10-28 17:11:36,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:11:36,214 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 336 transitions. [2020-10-28 17:11:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 17:11:36,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:36,218 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] [2020-10-28 17:11:36,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 17:11:36,219 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:36,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:36,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1822595601, now seen corresponding path program 1 times [2020-10-28 17:11:36,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:36,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636364102] [2020-10-28 17:11:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:36,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:36,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:36,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 17:11:36,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:36,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-28 17:11:36,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:36,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:36,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:11:36,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:11:36,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 17:11:36,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:36,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:36,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:36,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:36,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:36,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:36,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 17:11:36,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:36,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:36,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:36,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:36,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:36,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:11:36,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636364102] [2020-10-28 17:11:36,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:11:36,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:11:36,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163892331] [2020-10-28 17:11:36,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:11:36,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:36,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:11:36,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:11:36,492 INFO L87 Difference]: Start difference. First operand 201 states and 336 transitions. Second operand 4 states. [2020-10-28 17:11:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:37,202 INFO L93 Difference]: Finished difference Result 308 states and 506 transitions. [2020-10-28 17:11:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:11:37,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-28 17:11:37,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:37,205 INFO L225 Difference]: With dead ends: 308 [2020-10-28 17:11:37,206 INFO L226 Difference]: Without dead ends: 291 [2020-10-28 17:11:37,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:37,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-28 17:11:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 271. [2020-10-28 17:11:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-28 17:11:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 450 transitions. [2020-10-28 17:11:37,240 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 450 transitions. Word has length 22 [2020-10-28 17:11:37,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:37,241 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 450 transitions. [2020-10-28 17:11:37,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:11:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 450 transitions. [2020-10-28 17:11:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 17:11:37,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:37,242 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] [2020-10-28 17:11:37,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 17:11:37,243 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:37,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:37,243 INFO L82 PathProgramCache]: Analyzing trace with hash 55202777, now seen corresponding path program 1 times [2020-10-28 17:11:37,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:37,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493921023] [2020-10-28 17:11:37,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:37,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:37,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:37,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:37,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 17:11:37,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:11:37,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-28 17:11:37,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:37,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:37,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:11:37,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:11:37,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 17:11:37,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:37,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:37,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:37,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:37,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:37,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:37,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 17:11:37,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:37,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:37,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:37,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:37,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:37,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:11:37,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493921023] [2020-10-28 17:11:37,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:11:37,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:11:37,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663474065] [2020-10-28 17:11:37,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:11:37,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:37,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:11:37,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:11:37,518 INFO L87 Difference]: Start difference. First operand 271 states and 450 transitions. Second operand 4 states. [2020-10-28 17:11:38,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:38,117 INFO L93 Difference]: Finished difference Result 507 states and 847 transitions. [2020-10-28 17:11:38,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:11:38,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-28 17:11:38,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:38,124 INFO L225 Difference]: With dead ends: 507 [2020-10-28 17:11:38,124 INFO L226 Difference]: Without dead ends: 242 [2020-10-28 17:11:38,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:38,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-28 17:11:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2020-10-28 17:11:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-28 17:11:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 390 transitions. [2020-10-28 17:11:38,142 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 390 transitions. Word has length 23 [2020-10-28 17:11:38,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:38,143 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 390 transitions. [2020-10-28 17:11:38,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:11:38,143 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 390 transitions. [2020-10-28 17:11:38,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 17:11:38,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:38,145 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:11:38,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 17:11:38,145 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:38,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1113693870, now seen corresponding path program 1 times [2020-10-28 17:11:38,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:38,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721344713] [2020-10-28 17:11:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:38,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:38,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:38,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:38,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 17:11:38,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:11:38,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-28 17:11:38,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:38,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:38,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:11:38,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:11:38,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 17:11:38,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:38,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:38,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:38,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:38,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:38,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:38,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:11:38,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:38,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:38,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:38,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:38,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:38,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 17 [2020-10-28 17:11:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:11:38,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721344713] [2020-10-28 17:11:38,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:11:38,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 17:11:38,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207897999] [2020-10-28 17:11:38,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 17:11:38,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:38,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 17:11:38,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:38,554 INFO L87 Difference]: Start difference. First operand 241 states and 390 transitions. Second operand 5 states. [2020-10-28 17:11:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:39,896 INFO L93 Difference]: Finished difference Result 620 states and 997 transitions. [2020-10-28 17:11:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 17:11:39,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-28 17:11:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:39,902 INFO L225 Difference]: With dead ends: 620 [2020-10-28 17:11:39,902 INFO L226 Difference]: Without dead ends: 381 [2020-10-28 17:11:39,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:11:39,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-28 17:11:39,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 323. [2020-10-28 17:11:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-28 17:11:39,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 540 transitions. [2020-10-28 17:11:39,930 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 540 transitions. Word has length 29 [2020-10-28 17:11:39,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:39,931 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 540 transitions. [2020-10-28 17:11:39,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 17:11:39,931 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 540 transitions. [2020-10-28 17:11:39,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 17:11:39,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:39,933 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:11:39,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 17:11:39,933 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:39,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:39,935 INFO L82 PathProgramCache]: Analyzing trace with hash 304347244, now seen corresponding path program 1 times [2020-10-28 17:11:39,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:39,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617311543] [2020-10-28 17:11:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:39,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:40,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:40,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 17:11:40,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:40,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-28 17:11:40,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:40,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:40,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:11:40,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 17:11:40,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:11:40,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:40,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:40,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:40,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:40,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:40,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:40,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 17:11:40,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:40,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:40,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:40,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:40,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:40,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:11:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 17:11:40,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617311543] [2020-10-28 17:11:40,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:11:40,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:11:40,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457748663] [2020-10-28 17:11:40,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:11:40,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:40,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:11:40,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:11:40,212 INFO L87 Difference]: Start difference. First operand 323 states and 540 transitions. Second operand 4 states. [2020-10-28 17:11:40,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:40,454 INFO L93 Difference]: Finished difference Result 599 states and 1000 transitions. [2020-10-28 17:11:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:11:40,455 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-28 17:11:40,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:40,458 INFO L225 Difference]: With dead ends: 599 [2020-10-28 17:11:40,458 INFO L226 Difference]: Without dead ends: 282 [2020-10-28 17:11:40,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-28 17:11:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2020-10-28 17:11:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-28 17:11:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 456 transitions. [2020-10-28 17:11:40,480 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 456 transitions. Word has length 29 [2020-10-28 17:11:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:40,483 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 456 transitions. [2020-10-28 17:11:40,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:11:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 456 transitions. [2020-10-28 17:11:40,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 17:11:40,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:40,493 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 17:11:40,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 17:11:40,493 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:40,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:40,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1435814795, now seen corresponding path program 1 times [2020-10-28 17:11:40,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:40,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218849673] [2020-10-28 17:11:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:40,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:40,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:40,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:40,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 17:11:40,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:11:40,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-28 17:11:40,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:40,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:40,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:11:40,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:11:40,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 17:11:40,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:40,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:41,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:41,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:41,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:41,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:41,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:11:41,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:41,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:41,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:41,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 17:11:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:11:41,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218849673] [2020-10-28 17:11:41,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:11:41,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 17:11:41,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742734260] [2020-10-28 17:11:41,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 17:11:41,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:41,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 17:11:41,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:41,026 INFO L87 Difference]: Start difference. First operand 281 states and 456 transitions. Second operand 5 states. [2020-10-28 17:11:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:42,017 INFO L93 Difference]: Finished difference Result 535 states and 876 transitions. [2020-10-28 17:11:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 17:11:42,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-28 17:11:42,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:42,023 INFO L225 Difference]: With dead ends: 535 [2020-10-28 17:11:42,023 INFO L226 Difference]: Without dead ends: 522 [2020-10-28 17:11:42,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 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 17:11:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-10-28 17:11:42,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 489. [2020-10-28 17:11:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-10-28 17:11:42,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 799 transitions. [2020-10-28 17:11:42,052 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 799 transitions. Word has length 31 [2020-10-28 17:11:42,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:42,053 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 799 transitions. [2020-10-28 17:11:42,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 17:11:42,053 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 799 transitions. [2020-10-28 17:11:42,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 17:11:42,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:42,055 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 17:11:42,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 17:11:42,055 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:42,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1915329473, now seen corresponding path program 1 times [2020-10-28 17:11:42,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:42,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286631202] [2020-10-28 17:11:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:42,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:42,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:42,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:42,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 17:11:42,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:11:42,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-28 17:11:42,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:42,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:42,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:11:42,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:11:42,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 17:11:42,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:42,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:42,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:42,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:42,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:42,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:42,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:11:42,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:42,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:42,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:42,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:42,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:42,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:11:42,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286631202] [2020-10-28 17:11:42,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:11:42,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 17:11:42,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915999365] [2020-10-28 17:11:42,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 17:11:42,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:42,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 17:11:42,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:42,453 INFO L87 Difference]: Start difference. First operand 489 states and 799 transitions. Second operand 5 states. [2020-10-28 17:11:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:43,362 INFO L93 Difference]: Finished difference Result 558 states and 901 transitions. [2020-10-28 17:11:43,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 17:11:43,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-28 17:11:43,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:43,366 INFO L225 Difference]: With dead ends: 558 [2020-10-28 17:11:43,367 INFO L226 Difference]: Without dead ends: 552 [2020-10-28 17:11:43,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:11:43,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2020-10-28 17:11:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 535. [2020-10-28 17:11:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-28 17:11:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 871 transitions. [2020-10-28 17:11:43,395 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 871 transitions. Word has length 32 [2020-10-28 17:11:43,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:43,395 INFO L481 AbstractCegarLoop]: Abstraction has 535 states and 871 transitions. [2020-10-28 17:11:43,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 17:11:43,396 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 871 transitions. [2020-10-28 17:11:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 17:11:43,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:43,396 INFO L422 BasicCegarLoop]: trace histogram [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 17:11:43,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 17:11:43,397 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash -257354898, now seen corresponding path program 1 times [2020-10-28 17:11:43,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:43,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411235643] [2020-10-28 17:11:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:43,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:43,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:43,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:43,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 17:11:43,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:11:43,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-28 17:11:43,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:43,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:43,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:11:43,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 17:11:43,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 17:11:43,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:43,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:43,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:43,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:43,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:43,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:43,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:11:43,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:43,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:43,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:43,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:43,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:43,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 17:11:43,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411235643] [2020-10-28 17:11:43,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:11:43,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:11:43,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841955122] [2020-10-28 17:11:43,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:11:43,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:43,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:11:43,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:11:43,594 INFO L87 Difference]: Start difference. First operand 535 states and 871 transitions. Second operand 4 states. [2020-10-28 17:11:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:43,932 INFO L93 Difference]: Finished difference Result 1095 states and 1771 transitions. [2020-10-28 17:11:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:11:43,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-28 17:11:43,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:43,939 INFO L225 Difference]: With dead ends: 1095 [2020-10-28 17:11:43,940 INFO L226 Difference]: Without dead ends: 566 [2020-10-28 17:11:43,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:43,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-10-28 17:11:43,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 565. [2020-10-28 17:11:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2020-10-28 17:11:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 891 transitions. [2020-10-28 17:11:43,977 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 891 transitions. Word has length 33 [2020-10-28 17:11:43,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:43,978 INFO L481 AbstractCegarLoop]: Abstraction has 565 states and 891 transitions. [2020-10-28 17:11:43,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:11:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 891 transitions. [2020-10-28 17:11:43,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 17:11:43,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:43,980 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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 17:11:43,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 17:11:43,981 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:43,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:43,981 INFO L82 PathProgramCache]: Analyzing trace with hash -740511781, now seen corresponding path program 1 times [2020-10-28 17:11:43,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:43,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438540549] [2020-10-28 17:11:43,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:44,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:44,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:44,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:44,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:44,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 17:11:44,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:11:44,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-10-28 17:11:44,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:44,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:44,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:11:44,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 17:11:44,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 17:11:44,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:44,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:44,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:44,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:44,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:44,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:44,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:11:44,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:44,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:44,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 17:11:44,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438540549] [2020-10-28 17:11:44,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:11:44,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:11:44,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501990496] [2020-10-28 17:11:44,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:11:44,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:44,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:11:44,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:11:44,892 INFO L87 Difference]: Start difference. First operand 565 states and 891 transitions. Second operand 4 states. [2020-10-28 17:11:45,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:45,210 INFO L93 Difference]: Finished difference Result 1125 states and 1777 transitions. [2020-10-28 17:11:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:11:45,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-28 17:11:45,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:45,218 INFO L225 Difference]: With dead ends: 1125 [2020-10-28 17:11:45,218 INFO L226 Difference]: Without dead ends: 566 [2020-10-28 17:11:45,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-10-28 17:11:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 565. [2020-10-28 17:11:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2020-10-28 17:11:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 885 transitions. [2020-10-28 17:11:45,249 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 885 transitions. Word has length 41 [2020-10-28 17:11:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:45,250 INFO L481 AbstractCegarLoop]: Abstraction has 565 states and 885 transitions. [2020-10-28 17:11:45,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:11:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 885 transitions. [2020-10-28 17:11:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 17:11:45,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:45,251 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:11:45,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 17:11:45,252 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:45,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2091531186, now seen corresponding path program 1 times [2020-10-28 17:11:45,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:45,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743150878] [2020-10-28 17:11:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:45,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:45,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:45,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:45,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 17:11:45,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:11:45,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 563 [2020-10-28 17:11:45,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:45,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:45,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:11:45,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:11:45,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 17:11:45,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:45,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:45,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:45,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:45,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:45,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:45,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:11:45,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:45,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:45,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:45,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:45,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:45,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 17:11:45,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743150878] [2020-10-28 17:11:45,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:11:45,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 17:11:45,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184719991] [2020-10-28 17:11:45,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 17:11:45,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:45,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 17:11:45,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:45,973 INFO L87 Difference]: Start difference. First operand 565 states and 885 transitions. Second operand 5 states. [2020-10-28 17:11:46,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:46,860 INFO L93 Difference]: Finished difference Result 661 states and 1023 transitions. [2020-10-28 17:11:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 17:11:46,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-10-28 17:11:46,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:46,866 INFO L225 Difference]: With dead ends: 661 [2020-10-28 17:11:46,866 INFO L226 Difference]: Without dead ends: 651 [2020-10-28 17:11:46,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 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 17:11:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2020-10-28 17:11:46,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 620. [2020-10-28 17:11:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2020-10-28 17:11:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 970 transitions. [2020-10-28 17:11:46,898 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 970 transitions. Word has length 42 [2020-10-28 17:11:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:46,899 INFO L481 AbstractCegarLoop]: Abstraction has 620 states and 970 transitions. [2020-10-28 17:11:46,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 17:11:46,899 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 970 transitions. [2020-10-28 17:11:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 17:11:46,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:46,900 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:11:46,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 17:11:46,900 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:46,901 INFO L82 PathProgramCache]: Analyzing trace with hash -58121282, now seen corresponding path program 1 times [2020-10-28 17:11:46,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:46,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491742804] [2020-10-28 17:11:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:46,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:47,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:47,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:47,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 17:11:47,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:11:47,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 612 [2020-10-28 17:11:47,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:47,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:47,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:11:47,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:11:47,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 17:11:47,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:11:47,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:47,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:47,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:47,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:47,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:47,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:11:47,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:47,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:47,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:47,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:47,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:47,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:11:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 17:11:47,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491742804] [2020-10-28 17:11:47,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:11:47,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 17:11:47,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065151827] [2020-10-28 17:11:47,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 17:11:47,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:47,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 17:11:47,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:47,721 INFO L87 Difference]: Start difference. First operand 620 states and 970 transitions. Second operand 5 states. [2020-10-28 17:11:48,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:48,620 INFO L93 Difference]: Finished difference Result 656 states and 1010 transitions. [2020-10-28 17:11:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 17:11:48,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-28 17:11:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:48,628 INFO L225 Difference]: With dead ends: 656 [2020-10-28 17:11:48,628 INFO L226 Difference]: Without dead ends: 643 [2020-10-28 17:11:48,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:11:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2020-10-28 17:11:48,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 620. [2020-10-28 17:11:48,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2020-10-28 17:11:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 944 transitions. [2020-10-28 17:11:48,660 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 944 transitions. Word has length 43 [2020-10-28 17:11:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:48,660 INFO L481 AbstractCegarLoop]: Abstraction has 620 states and 944 transitions. [2020-10-28 17:11:48,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 17:11:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 944 transitions. [2020-10-28 17:11:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 17:11:48,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:48,661 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:11:48,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 17:11:48,662 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:48,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:48,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1549649939, now seen corresponding path program 1 times [2020-10-28 17:11:48,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:48,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439594120] [2020-10-28 17:11:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:48,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:48,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:48,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 17:11:48,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:48,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-28 17:11:48,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:48,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:48,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:11:48,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:11:48,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 17:11:48,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:49,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:49,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:49,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:49,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:49,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:49,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:11:49,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:49,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:49,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:49,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:49,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:49,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:11:49,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439594120] [2020-10-28 17:11:49,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:11:49,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 17:11:49,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465404280] [2020-10-28 17:11:49,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:11:49,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:49,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:11:49,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:11:49,221 INFO L87 Difference]: Start difference. First operand 620 states and 944 transitions. Second operand 6 states. [2020-10-28 17:11:50,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:50,365 INFO L93 Difference]: Finished difference Result 638 states and 964 transitions. [2020-10-28 17:11:50,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:11:50,366 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-28 17:11:50,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:50,370 INFO L225 Difference]: With dead ends: 638 [2020-10-28 17:11:50,370 INFO L226 Difference]: Without dead ends: 635 [2020-10-28 17:11:50,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 17:11:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2020-10-28 17:11:50,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 621. [2020-10-28 17:11:50,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-10-28 17:11:50,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 945 transitions. [2020-10-28 17:11:50,403 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 945 transitions. Word has length 45 [2020-10-28 17:11:50,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:50,403 INFO L481 AbstractCegarLoop]: Abstraction has 621 states and 945 transitions. [2020-10-28 17:11:50,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:11:50,404 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 945 transitions. [2020-10-28 17:11:50,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 17:11:50,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:50,404 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:11:50,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 17:11:50,405 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:50,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1207110944, now seen corresponding path program 1 times [2020-10-28 17:11:50,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:50,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400274600] [2020-10-28 17:11:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:50,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:50,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:50,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:50,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 17:11:50,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:11:50,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-28 17:11:50,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:50,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:50,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:11:50,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 17:11:50,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 17:11:50,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:50,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:50,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:50,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:50,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:50,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:50,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:11:50,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:50,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:50,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:50,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:50,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:50,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:11:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 17:11:50,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400274600] [2020-10-28 17:11:50,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:11:50,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:11:50,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100896791] [2020-10-28 17:11:50,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:11:50,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:50,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:11:50,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:11:50,734 INFO L87 Difference]: Start difference. First operand 621 states and 945 transitions. Second operand 4 states. [2020-10-28 17:11:51,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:51,034 INFO L93 Difference]: Finished difference Result 1257 states and 1900 transitions. [2020-10-28 17:11:51,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:11:51,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-28 17:11:51,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:51,040 INFO L225 Difference]: With dead ends: 1257 [2020-10-28 17:11:51,040 INFO L226 Difference]: Without dead ends: 642 [2020-10-28 17:11:51,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:51,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2020-10-28 17:11:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 641. [2020-10-28 17:11:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2020-10-28 17:11:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 953 transitions. [2020-10-28 17:11:51,077 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 953 transitions. Word has length 46 [2020-10-28 17:11:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:51,078 INFO L481 AbstractCegarLoop]: Abstraction has 641 states and 953 transitions. [2020-10-28 17:11:51,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:11:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 953 transitions. [2020-10-28 17:11:51,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 17:11:51,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:51,079 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:11:51,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 17:11:51,080 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:51,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:51,080 INFO L82 PathProgramCache]: Analyzing trace with hash 872163668, now seen corresponding path program 1 times [2020-10-28 17:11:51,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:51,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762035346] [2020-10-28 17:11:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:51,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:51,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:51,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:51,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:51,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:52,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:52,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 17:11:52,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:11:52,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-10-28 17:11:52,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:52,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:52,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:11:52,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 17:11:52,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 17:11:52,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:52,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:52,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:52,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:52,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:52,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:52,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:11:52,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:52,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:52,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:52,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-28 17:11:52,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762035346] [2020-10-28 17:11:52,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:11:52,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:11:52,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611860249] [2020-10-28 17:11:52,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:11:52,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:52,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:11:52,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:11:52,269 INFO L87 Difference]: Start difference. First operand 641 states and 953 transitions. Second operand 4 states. [2020-10-28 17:11:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:52,903 INFO L93 Difference]: Finished difference Result 671 states and 984 transitions. [2020-10-28 17:11:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:11:52,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-28 17:11:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:52,908 INFO L225 Difference]: With dead ends: 671 [2020-10-28 17:11:52,908 INFO L226 Difference]: Without dead ends: 661 [2020-10-28 17:11:52,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-10-28 17:11:52,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 641. [2020-10-28 17:11:52,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2020-10-28 17:11:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 946 transitions. [2020-10-28 17:11:52,956 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 946 transitions. Word has length 56 [2020-10-28 17:11:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:52,957 INFO L481 AbstractCegarLoop]: Abstraction has 641 states and 946 transitions. [2020-10-28 17:11:52,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:11:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 946 transitions. [2020-10-28 17:11:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 17:11:52,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:52,958 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:11:52,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 17:11:52,958 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:52,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:52,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1130329106, now seen corresponding path program 1 times [2020-10-28 17:11:52,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:52,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032395844] [2020-10-28 17:11:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:53,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:53,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:53,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:53,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:53,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 17:11:53,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:11:53,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-28 17:11:53,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:53,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:53,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:11:53,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 17:11:53,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 17:11:53,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:53,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:53,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:53,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:53,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:53,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:53,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 17:11:53,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:53,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:53,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:53,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:53,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:53,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-28 17:11:53,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032395844] [2020-10-28 17:11:53,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:11:53,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:11:53,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523826580] [2020-10-28 17:11:53,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:11:53,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:53,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:11:53,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:11:53,638 INFO L87 Difference]: Start difference. First operand 641 states and 946 transitions. Second operand 4 states. [2020-10-28 17:11:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:53,982 INFO L93 Difference]: Finished difference Result 1003 states and 1471 transitions. [2020-10-28 17:11:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:11:53,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-28 17:11:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:53,985 INFO L225 Difference]: With dead ends: 1003 [2020-10-28 17:11:53,986 INFO L226 Difference]: Without dead ends: 368 [2020-10-28 17:11:53,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:11:53,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-10-28 17:11:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 367. [2020-10-28 17:11:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-28 17:11:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 527 transitions. [2020-10-28 17:11:54,026 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 527 transitions. Word has length 56 [2020-10-28 17:11:54,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:54,027 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 527 transitions. [2020-10-28 17:11:54,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:11:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 527 transitions. [2020-10-28 17:11:54,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 17:11:54,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:54,028 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:11:54,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 17:11:54,029 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:54,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:54,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1177529757, now seen corresponding path program 1 times [2020-10-28 17:11:54,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:54,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169174273] [2020-10-28 17:11:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:54,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:54,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:54,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:54,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 17:11:54,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:11:54,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 885 [2020-10-28 17:11:54,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:54,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:54,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:11:54,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:11:54,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 17:11:54,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:55,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:55,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:55,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:55,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:55,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:55,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 17:11:55,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:55,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:55,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:55,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:55,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:55,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:11:55,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169174273] [2020-10-28 17:11:55,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:11:55,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 17:11:55,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785558863] [2020-10-28 17:11:55,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 17:11:55,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:55,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 17:11:55,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:11:55,182 INFO L87 Difference]: Start difference. First operand 367 states and 527 transitions. Second operand 7 states. [2020-10-28 17:11:56,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:11:56,661 INFO L93 Difference]: Finished difference Result 456 states and 647 transitions. [2020-10-28 17:11:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 17:11:56,664 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-28 17:11:56,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:11:56,667 INFO L225 Difference]: With dead ends: 456 [2020-10-28 17:11:56,667 INFO L226 Difference]: Without dead ends: 450 [2020-10-28 17:11:56,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-28 17:11:56,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-28 17:11:56,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 410. [2020-10-28 17:11:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-10-28 17:11:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 591 transitions. [2020-10-28 17:11:56,695 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 591 transitions. Word has length 57 [2020-10-28 17:11:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:11:56,696 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 591 transitions. [2020-10-28 17:11:56,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 17:11:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 591 transitions. [2020-10-28 17:11:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 17:11:56,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:11:56,697 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:11:56,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 17:11:56,697 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:11:56,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:11:56,698 INFO L82 PathProgramCache]: Analyzing trace with hash -211541169, now seen corresponding path program 1 times [2020-10-28 17:11:56,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:11:56,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377270018] [2020-10-28 17:11:56,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:11:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:56,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:56,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:56,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:58,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:58,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 17:11:58,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:11:58,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1982 [2020-10-28 17:11:58,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:58,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:58,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:11:58,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:11:58,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 17:11:58,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:58,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:11:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:11:58,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:11:58,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:11:58,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:11:58,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:11:58,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:11:58,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:11:58,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:11:58,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:11:58,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:11:58,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:11:58,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:11:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 17:11:58,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377270018] [2020-10-28 17:11:58,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:11:58,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 17:11:58,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711159669] [2020-10-28 17:11:58,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:11:58,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:11:58,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:11:58,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:11:58,834 INFO L87 Difference]: Start difference. First operand 410 states and 591 transitions. Second operand 6 states. [2020-10-28 17:12:00,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:00,085 INFO L93 Difference]: Finished difference Result 951 states and 1369 transitions. [2020-10-28 17:12:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:12:00,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-28 17:12:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:00,095 INFO L225 Difference]: With dead ends: 951 [2020-10-28 17:12:00,095 INFO L226 Difference]: Without dead ends: 547 [2020-10-28 17:12:00,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 17:12:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-10-28 17:12:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 498. [2020-10-28 17:12:00,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-28 17:12:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 722 transitions. [2020-10-28 17:12:00,125 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 722 transitions. Word has length 60 [2020-10-28 17:12:00,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:00,125 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 722 transitions. [2020-10-28 17:12:00,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:12:00,125 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 722 transitions. [2020-10-28 17:12:00,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 17:12:00,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:00,126 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:00,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 17:12:00,126 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:00,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1232609523, now seen corresponding path program 1 times [2020-10-28 17:12:00,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:00,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562898910] [2020-10-28 17:12:00,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:00,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:00,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:00,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 17:12:00,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:00,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-28 17:12:00,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:00,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:00,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:12:00,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:12:00,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 17:12:00,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:00,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:00,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:00,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:00,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:00,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:00,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:12:00,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:00,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:00,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:00,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:00,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:00,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 17:12:00,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562898910] [2020-10-28 17:12:00,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:12:00,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 17:12:00,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303679949] [2020-10-28 17:12:00,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:12:00,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:00,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:12:00,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:12:00,766 INFO L87 Difference]: Start difference. First operand 498 states and 722 transitions. Second operand 6 states. [2020-10-28 17:12:01,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:01,668 INFO L93 Difference]: Finished difference Result 528 states and 756 transitions. [2020-10-28 17:12:01,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:12:01,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-28 17:12:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:01,672 INFO L225 Difference]: With dead ends: 528 [2020-10-28 17:12:01,672 INFO L226 Difference]: Without dead ends: 524 [2020-10-28 17:12:01,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 17:12:01,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-10-28 17:12:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 498. [2020-10-28 17:12:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-28 17:12:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 721 transitions. [2020-10-28 17:12:01,700 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 721 transitions. Word has length 60 [2020-10-28 17:12:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:01,700 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 721 transitions. [2020-10-28 17:12:01,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:12:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 721 transitions. [2020-10-28 17:12:01,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 17:12:01,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:01,701 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:01,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 17:12:01,701 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:01,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:01,702 INFO L82 PathProgramCache]: Analyzing trace with hash 798796411, now seen corresponding path program 1 times [2020-10-28 17:12:01,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:01,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156802866] [2020-10-28 17:12:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:01,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:02,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:02,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 17:12:02,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:02,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-28 17:12:02,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:02,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:02,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:12:02,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:12:02,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 17:12:02,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:02,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:02,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:02,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:02,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:02,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:02,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:12:02,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:02,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:02,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:02,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:02,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:02,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:12:02,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156802866] [2020-10-28 17:12:02,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:12:02,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 17:12:02,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768005238] [2020-10-28 17:12:02,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 17:12:02,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:02,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 17:12:02,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:12:02,196 INFO L87 Difference]: Start difference. First operand 498 states and 721 transitions. Second operand 7 states. [2020-10-28 17:12:03,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:03,333 INFO L93 Difference]: Finished difference Result 513 states and 737 transitions. [2020-10-28 17:12:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 17:12:03,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-10-28 17:12:03,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:03,338 INFO L225 Difference]: With dead ends: 513 [2020-10-28 17:12:03,338 INFO L226 Difference]: Without dead ends: 510 [2020-10-28 17:12:03,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-28 17:12:03,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-10-28 17:12:03,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 498. [2020-10-28 17:12:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-28 17:12:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 720 transitions. [2020-10-28 17:12:03,366 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 720 transitions. Word has length 61 [2020-10-28 17:12:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:03,366 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 720 transitions. [2020-10-28 17:12:03,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 17:12:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 720 transitions. [2020-10-28 17:12:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 17:12:03,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:03,367 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:03,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 17:12:03,367 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:03,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:03,368 INFO L82 PathProgramCache]: Analyzing trace with hash -134972222, now seen corresponding path program 1 times [2020-10-28 17:12:03,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:03,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413492003] [2020-10-28 17:12:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:03,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:03,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:04,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:04,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 17:12:04,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:12:04,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-10-28 17:12:04,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:04,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:04,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:12:04,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:12:04,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 17:12:04,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:04,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:04,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:04,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:04,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:04,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:04,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:12:04,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:04,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:04,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:04,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:04,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:04,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:12:04,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413492003] [2020-10-28 17:12:04,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:12:04,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 17:12:04,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950118318] [2020-10-28 17:12:04,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 17:12:04,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:04,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 17:12:04,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 17:12:04,778 INFO L87 Difference]: Start difference. First operand 498 states and 720 transitions. Second operand 8 states. [2020-10-28 17:12:06,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:06,371 INFO L93 Difference]: Finished difference Result 526 states and 752 transitions. [2020-10-28 17:12:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 17:12:06,374 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-28 17:12:06,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:06,377 INFO L225 Difference]: With dead ends: 526 [2020-10-28 17:12:06,377 INFO L226 Difference]: Without dead ends: 523 [2020-10-28 17:12:06,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-28 17:12:06,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-28 17:12:06,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 499. [2020-10-28 17:12:06,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-10-28 17:12:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 721 transitions. [2020-10-28 17:12:06,405 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 721 transitions. Word has length 68 [2020-10-28 17:12:06,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:06,405 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 721 transitions. [2020-10-28 17:12:06,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 17:12:06,405 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 721 transitions. [2020-10-28 17:12:06,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 17:12:06,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:06,407 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:06,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 17:12:06,407 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:06,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:06,407 INFO L82 PathProgramCache]: Analyzing trace with hash 2053058480, now seen corresponding path program 1 times [2020-10-28 17:12:06,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:06,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137130926] [2020-10-28 17:12:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:06,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:07,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:07,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 17:12:07,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:07,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-28 17:12:07,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:07,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:07,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 17:12:07,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:12:07,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 17:12:07,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:07,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:07,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:07,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:07,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:07,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:07,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:12:07,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:07,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:07,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:07,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:07,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:07,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 17:12:07,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137130926] [2020-10-28 17:12:07,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:12:07,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 17:12:07,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670579183] [2020-10-28 17:12:07,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 17:12:07,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:07,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 17:12:07,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:12:07,217 INFO L87 Difference]: Start difference. First operand 499 states and 721 transitions. Second operand 7 states. [2020-10-28 17:12:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:08,909 INFO L93 Difference]: Finished difference Result 1150 states and 1652 transitions. [2020-10-28 17:12:08,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 17:12:08,910 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 78 [2020-10-28 17:12:08,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:08,915 INFO L225 Difference]: With dead ends: 1150 [2020-10-28 17:12:08,915 INFO L226 Difference]: Without dead ends: 657 [2020-10-28 17:12:08,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 17:12:08,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2020-10-28 17:12:08,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 587. [2020-10-28 17:12:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-10-28 17:12:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 854 transitions. [2020-10-28 17:12:08,948 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 854 transitions. Word has length 78 [2020-10-28 17:12:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:08,948 INFO L481 AbstractCegarLoop]: Abstraction has 587 states and 854 transitions. [2020-10-28 17:12:08,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 17:12:08,948 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 854 transitions. [2020-10-28 17:12:08,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 17:12:08,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:08,950 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:08,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 17:12:08,950 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:08,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:08,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1540844238, now seen corresponding path program 1 times [2020-10-28 17:12:08,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:08,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431338484] [2020-10-28 17:12:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:09,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:09,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:09,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:11,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:11,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 17:12:11,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:12:11,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2363 [2020-10-28 17:12:11,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:11,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:11,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:12:11,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-28 17:12:11,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 17:12:11,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:11,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:11,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:11,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:11,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:11,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:11,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:12:11,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:11,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:11,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:11,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:11,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:11,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 17:12:11,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431338484] [2020-10-28 17:12:11,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:12:11,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 17:12:11,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205152538] [2020-10-28 17:12:11,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 17:12:11,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:11,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 17:12:11,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:12:11,490 INFO L87 Difference]: Start difference. First operand 587 states and 854 transitions. Second operand 5 states. [2020-10-28 17:12:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:12,258 INFO L93 Difference]: Finished difference Result 603 states and 869 transitions. [2020-10-28 17:12:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:12:12,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-28 17:12:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:12,264 INFO L225 Difference]: With dead ends: 603 [2020-10-28 17:12:12,264 INFO L226 Difference]: Without dead ends: 598 [2020-10-28 17:12:12,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 17:12:12,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-10-28 17:12:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 586. [2020-10-28 17:12:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-28 17:12:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 842 transitions. [2020-10-28 17:12:12,297 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 842 transitions. Word has length 78 [2020-10-28 17:12:12,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:12,297 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 842 transitions. [2020-10-28 17:12:12,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 17:12:12,297 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 842 transitions. [2020-10-28 17:12:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 17:12:12,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:12,298 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:12,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 17:12:12,300 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:12,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:12,301 INFO L82 PathProgramCache]: Analyzing trace with hash -89889665, now seen corresponding path program 1 times [2020-10-28 17:12:12,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:12,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650602196] [2020-10-28 17:12:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:12,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:12,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:12,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:14,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:14,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 17:12:14,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:12:14,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1939 [2020-10-28 17:12:14,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:14,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:14,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:12:14,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-28 17:12:14,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:12:14,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:14,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:14,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:14,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:14,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:14,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:14,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:12:14,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:14,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:14,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:14,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:14,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:14,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-28 17:12:14,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650602196] [2020-10-28 17:12:14,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:12:14,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 17:12:14,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690329346] [2020-10-28 17:12:14,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 17:12:14,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:14,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 17:12:14,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:12:14,496 INFO L87 Difference]: Start difference. First operand 586 states and 842 transitions. Second operand 5 states. [2020-10-28 17:12:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:15,238 INFO L93 Difference]: Finished difference Result 604 states and 859 transitions. [2020-10-28 17:12:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:12:15,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-10-28 17:12:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:15,242 INFO L225 Difference]: With dead ends: 604 [2020-10-28 17:12:15,242 INFO L226 Difference]: Without dead ends: 600 [2020-10-28 17:12:15,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 17:12:15,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2020-10-28 17:12:15,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 586. [2020-10-28 17:12:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-28 17:12:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 838 transitions. [2020-10-28 17:12:15,273 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 838 transitions. Word has length 88 [2020-10-28 17:12:15,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:15,273 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 838 transitions. [2020-10-28 17:12:15,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 17:12:15,273 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 838 transitions. [2020-10-28 17:12:15,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 17:12:15,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:15,275 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:15,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 17:12:15,275 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:15,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:15,275 INFO L82 PathProgramCache]: Analyzing trace with hash -2014756210, now seen corresponding path program 1 times [2020-10-28 17:12:15,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:15,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994134917] [2020-10-28 17:12:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:15,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:16,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:16,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 17:12:16,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:16,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 885 [2020-10-28 17:12:16,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:16,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:16,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 17:12:16,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:12:16,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 17:12:16,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:16,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:16,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:16,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:16,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:16,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:16,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:12:16,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:16,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:16,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:16,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:16,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:16,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 17:12:16,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994134917] [2020-10-28 17:12:16,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:12:16,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 17:12:16,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240929971] [2020-10-28 17:12:16,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 17:12:16,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:16,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 17:12:16,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:12:16,343 INFO L87 Difference]: Start difference. First operand 586 states and 838 transitions. Second operand 7 states. [2020-10-28 17:12:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:17,272 INFO L93 Difference]: Finished difference Result 763 states and 1083 transitions. [2020-10-28 17:12:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 17:12:17,274 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 90 [2020-10-28 17:12:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:17,278 INFO L225 Difference]: With dead ends: 763 [2020-10-28 17:12:17,278 INFO L226 Difference]: Without dead ends: 757 [2020-10-28 17:12:17,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 17:12:17,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2020-10-28 17:12:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 717. [2020-10-28 17:12:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 717 states. [2020-10-28 17:12:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1027 transitions. [2020-10-28 17:12:17,324 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1027 transitions. Word has length 90 [2020-10-28 17:12:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:17,325 INFO L481 AbstractCegarLoop]: Abstraction has 717 states and 1027 transitions. [2020-10-28 17:12:17,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 17:12:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1027 transitions. [2020-10-28 17:12:17,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 17:12:17,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:17,326 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:17,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 17:12:17,326 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:17,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1973035492, now seen corresponding path program 1 times [2020-10-28 17:12:17,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:17,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383268609] [2020-10-28 17:12:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:17,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:18,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:18,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 17:12:18,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:18,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-28 17:12:18,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:18,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:18,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 17:12:18,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:12:18,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 17:12:18,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:18,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:18,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:18,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:18,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:18,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:18,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:12:18,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:18,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:18,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:18,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:18,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:18,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:12:18,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383268609] [2020-10-28 17:12:18,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:12:18,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 17:12:18,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269316194] [2020-10-28 17:12:18,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 17:12:18,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:18,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 17:12:18,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 17:12:18,856 INFO L87 Difference]: Start difference. First operand 717 states and 1027 transitions. Second operand 10 states. [2020-10-28 17:12:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:20,857 INFO L93 Difference]: Finished difference Result 746 states and 1060 transitions. [2020-10-28 17:12:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 17:12:20,858 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 91 [2020-10-28 17:12:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:20,864 INFO L225 Difference]: With dead ends: 746 [2020-10-28 17:12:20,864 INFO L226 Difference]: Without dead ends: 743 [2020-10-28 17:12:20,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-28 17:12:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-10-28 17:12:20,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 718. [2020-10-28 17:12:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2020-10-28 17:12:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1028 transitions. [2020-10-28 17:12:20,909 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1028 transitions. Word has length 91 [2020-10-28 17:12:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:20,910 INFO L481 AbstractCegarLoop]: Abstraction has 718 states and 1028 transitions. [2020-10-28 17:12:20,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 17:12:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1028 transitions. [2020-10-28 17:12:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 17:12:20,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:20,911 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:20,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 17:12:20,912 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:20,912 INFO L82 PathProgramCache]: Analyzing trace with hash -524778164, now seen corresponding path program 1 times [2020-10-28 17:12:20,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:20,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288013194] [2020-10-28 17:12:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:20,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:21,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:21,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:23,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:23,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 17:12:23,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:12:23,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2951 [2020-10-28 17:12:23,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:23,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:23,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:12:23,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-28 17:12:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 17:12:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:24,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:24,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:24,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:24,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:24,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:24,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:12:24,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:24,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:24,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:24,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:24,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:24,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 105 proven. 13 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-28 17:12:24,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288013194] [2020-10-28 17:12:24,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:12:24,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 17:12:24,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809421248] [2020-10-28 17:12:24,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:12:24,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:24,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:12:24,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:12:24,184 INFO L87 Difference]: Start difference. First operand 718 states and 1028 transitions. Second operand 6 states. [2020-10-28 17:12:25,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:25,388 INFO L93 Difference]: Finished difference Result 1375 states and 1957 transitions. [2020-10-28 17:12:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 17:12:25,388 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2020-10-28 17:12:25,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:25,391 INFO L225 Difference]: With dead ends: 1375 [2020-10-28 17:12:25,391 INFO L226 Difference]: Without dead ends: 659 [2020-10-28 17:12:25,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-28 17:12:25,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2020-10-28 17:12:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 631. [2020-10-28 17:12:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-10-28 17:12:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 891 transitions. [2020-10-28 17:12:25,425 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 891 transitions. Word has length 103 [2020-10-28 17:12:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:25,425 INFO L481 AbstractCegarLoop]: Abstraction has 631 states and 891 transitions. [2020-10-28 17:12:25,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:12:25,425 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 891 transitions. [2020-10-28 17:12:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 17:12:25,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:25,427 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:25,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 17:12:25,427 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:25,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:25,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1307015488, now seen corresponding path program 1 times [2020-10-28 17:12:25,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:25,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413724709] [2020-10-28 17:12:25,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:25,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:25,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:25,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:26,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:26,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:30,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:30,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 17:12:30,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:12:30,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4712 [2020-10-28 17:12:30,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:30,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:30,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 17:12:30,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:12:30,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 17:12:30,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:30,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:30,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:30,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:30,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:30,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:30,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:12:30,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:30,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:30,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:30,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:30,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:30,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 57 proven. 118 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 17:12:30,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413724709] [2020-10-28 17:12:30,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:12:30,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 17:12:30,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916556869] [2020-10-28 17:12:30,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 17:12:30,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:30,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 17:12:30,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 17:12:30,309 INFO L87 Difference]: Start difference. First operand 631 states and 891 transitions. Second operand 8 states. [2020-10-28 17:12:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:31,832 INFO L93 Difference]: Finished difference Result 1393 states and 1964 transitions. [2020-10-28 17:12:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 17:12:31,833 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-10-28 17:12:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:31,837 INFO L225 Difference]: With dead ends: 1393 [2020-10-28 17:12:31,837 INFO L226 Difference]: Without dead ends: 768 [2020-10-28 17:12:31,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 17:12:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-10-28 17:12:31,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 718. [2020-10-28 17:12:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2020-10-28 17:12:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1016 transitions. [2020-10-28 17:12:31,874 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1016 transitions. Word has length 106 [2020-10-28 17:12:31,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:31,875 INFO L481 AbstractCegarLoop]: Abstraction has 718 states and 1016 transitions. [2020-10-28 17:12:31,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 17:12:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1016 transitions. [2020-10-28 17:12:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 17:12:31,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:31,876 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:31,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 17:12:31,877 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:31,877 INFO L82 PathProgramCache]: Analyzing trace with hash 629412522, now seen corresponding path program 1 times [2020-10-28 17:12:31,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:31,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143710379] [2020-10-28 17:12:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:31,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:32,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:32,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 17:12:32,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:32,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 834 [2020-10-28 17:12:32,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:32,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:32,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 17:12:32,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:12:32,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 17:12:32,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:33,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:33,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:33,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:33,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:33,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:33,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:12:33,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:33,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:33,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:33,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:33,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:33,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 24 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:12:33,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143710379] [2020-10-28 17:12:33,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:12:33,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 17:12:33,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579960433] [2020-10-28 17:12:33,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 17:12:33,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:33,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 17:12:33,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-28 17:12:33,091 INFO L87 Difference]: Start difference. First operand 718 states and 1016 transitions. Second operand 11 states. [2020-10-28 17:12:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:35,792 INFO L93 Difference]: Finished difference Result 745 states and 1046 transitions. [2020-10-28 17:12:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 17:12:35,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 107 [2020-10-28 17:12:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:35,796 INFO L225 Difference]: With dead ends: 745 [2020-10-28 17:12:35,796 INFO L226 Difference]: Without dead ends: 742 [2020-10-28 17:12:35,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2020-10-28 17:12:35,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2020-10-28 17:12:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 718. [2020-10-28 17:12:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2020-10-28 17:12:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1015 transitions. [2020-10-28 17:12:35,833 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1015 transitions. Word has length 107 [2020-10-28 17:12:35,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:35,833 INFO L481 AbstractCegarLoop]: Abstraction has 718 states and 1015 transitions. [2020-10-28 17:12:35,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 17:12:35,833 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1015 transitions. [2020-10-28 17:12:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 17:12:35,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:35,835 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:35,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 17:12:35,835 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:35,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1824477619, now seen corresponding path program 2 times [2020-10-28 17:12:35,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:35,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696610025] [2020-10-28 17:12:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:35,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:36,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:36,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:39,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:39,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 17:12:39,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:12:39,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3180 [2020-10-28 17:12:39,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:39,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:12:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-28 17:12:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 17:12:39,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:39,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:39,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:39,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:39,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:39,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:39,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:12:39,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:39,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:39,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:39,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:39,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:39,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 139 proven. 32 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 17:12:39,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696610025] [2020-10-28 17:12:39,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:12:39,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 17:12:39,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391110283] [2020-10-28 17:12:39,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 17:12:39,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:39,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 17:12:39,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 17:12:39,462 INFO L87 Difference]: Start difference. First operand 718 states and 1015 transitions. Second operand 8 states. [2020-10-28 17:12:41,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:41,597 INFO L93 Difference]: Finished difference Result 765 states and 1065 transitions. [2020-10-28 17:12:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 17:12:41,597 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 114 [2020-10-28 17:12:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:41,600 INFO L225 Difference]: With dead ends: 765 [2020-10-28 17:12:41,600 INFO L226 Difference]: Without dead ends: 762 [2020-10-28 17:12:41,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-28 17:12:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2020-10-28 17:12:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 718. [2020-10-28 17:12:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2020-10-28 17:12:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1011 transitions. [2020-10-28 17:12:41,638 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1011 transitions. Word has length 114 [2020-10-28 17:12:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:41,639 INFO L481 AbstractCegarLoop]: Abstraction has 718 states and 1011 transitions. [2020-10-28 17:12:41,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 17:12:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1011 transitions. [2020-10-28 17:12:41,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 17:12:41,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:41,641 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:41,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 17:12:41,641 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:41,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1979888799, now seen corresponding path program 2 times [2020-10-28 17:12:41,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:41,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106638322] [2020-10-28 17:12:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:41,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:42,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:42,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 17:12:42,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:42,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1152 [2020-10-28 17:12:42,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:42,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:42,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 17:12:42,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:12:42,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 17:12:42,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:42,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:42,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:42,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:42,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:42,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:42,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:12:42,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:42,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:42,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:42,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:42,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:42,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 68 proven. 206 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 17:12:42,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106638322] [2020-10-28 17:12:42,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:12:42,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 17:12:42,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046189260] [2020-10-28 17:12:42,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 17:12:42,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:42,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 17:12:42,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 17:12:42,984 INFO L87 Difference]: Start difference. First operand 718 states and 1011 transitions. Second operand 9 states. [2020-10-28 17:12:45,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:45,240 INFO L93 Difference]: Finished difference Result 1548 states and 2163 transitions. [2020-10-28 17:12:45,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 17:12:45,245 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 124 [2020-10-28 17:12:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:45,249 INFO L225 Difference]: With dead ends: 1548 [2020-10-28 17:12:45,249 INFO L226 Difference]: Without dead ends: 836 [2020-10-28 17:12:45,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-28 17:12:45,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2020-10-28 17:12:45,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 762. [2020-10-28 17:12:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2020-10-28 17:12:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1071 transitions. [2020-10-28 17:12:45,320 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1071 transitions. Word has length 124 [2020-10-28 17:12:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:45,320 INFO L481 AbstractCegarLoop]: Abstraction has 762 states and 1071 transitions. [2020-10-28 17:12:45,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 17:12:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1071 transitions. [2020-10-28 17:12:45,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 17:12:45,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:45,322 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:45,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 17:12:45,323 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:45,323 INFO L82 PathProgramCache]: Analyzing trace with hash -635172341, now seen corresponding path program 2 times [2020-10-28 17:12:45,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:45,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51652440] [2020-10-28 17:12:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:45,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:47,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:47,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 17:12:47,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:47,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1810 [2020-10-28 17:12:47,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:47,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:47,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 17:12:47,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:12:47,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-28 17:12:47,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:48,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:48,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:48,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:48,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:48,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:48,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:12:48,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:48,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:48,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:48,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:48,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:48,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 33 proven. 334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:12:48,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51652440] [2020-10-28 17:12:48,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:12:48,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 17:12:48,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169743522] [2020-10-28 17:12:48,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 17:12:48,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:48,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 17:12:48,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-28 17:12:48,131 INFO L87 Difference]: Start difference. First operand 762 states and 1071 transitions. Second operand 14 states. [2020-10-28 17:12:52,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:52,060 INFO L93 Difference]: Finished difference Result 803 states and 1118 transitions. [2020-10-28 17:12:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 17:12:52,066 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 137 [2020-10-28 17:12:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:52,069 INFO L225 Difference]: With dead ends: 803 [2020-10-28 17:12:52,069 INFO L226 Difference]: Without dead ends: 800 [2020-10-28 17:12:52,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2020-10-28 17:12:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2020-10-28 17:12:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 763. [2020-10-28 17:12:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 763 states. [2020-10-28 17:12:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1072 transitions. [2020-10-28 17:12:52,107 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1072 transitions. Word has length 137 [2020-10-28 17:12:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:52,107 INFO L481 AbstractCegarLoop]: Abstraction has 763 states and 1072 transitions. [2020-10-28 17:12:52,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 17:12:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1072 transitions. [2020-10-28 17:12:52,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-28 17:12:52,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:52,110 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:52,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 17:12:52,110 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:52,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:52,110 INFO L82 PathProgramCache]: Analyzing trace with hash -505671311, now seen corresponding path program 2 times [2020-10-28 17:12:52,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:52,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898756894] [2020-10-28 17:12:52,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:52,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:52,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:53,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:53,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:54,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:55,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:56,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:57,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:57,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-28 17:12:57,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 17:12:57,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 17:12:57,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:57,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:57,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:12:57,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-28 17:12:57,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 17:12:57,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:57,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:12:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:57,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:12:57,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:12:57,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:12:57,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:12:57,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:12:57,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:12:57,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:12:57,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:12:57,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:12:57,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:12:57,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:12:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 204 proven. 10 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2020-10-28 17:12:57,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898756894] [2020-10-28 17:12:57,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:12:57,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 17:12:57,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866035915] [2020-10-28 17:12:57,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 17:12:57,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:12:57,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 17:12:57,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 17:12:57,482 INFO L87 Difference]: Start difference. First operand 763 states and 1072 transitions. Second operand 8 states. [2020-10-28 17:12:58,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:12:58,875 INFO L93 Difference]: Finished difference Result 1240 states and 1727 transitions. [2020-10-28 17:12:58,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 17:12:58,876 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 152 [2020-10-28 17:12:58,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:12:58,878 INFO L225 Difference]: With dead ends: 1240 [2020-10-28 17:12:58,879 INFO L226 Difference]: Without dead ends: 483 [2020-10-28 17:12:58,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-28 17:12:58,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-10-28 17:12:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 446. [2020-10-28 17:12:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446 states. [2020-10-28 17:12:58,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 615 transitions. [2020-10-28 17:12:58,909 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 615 transitions. Word has length 152 [2020-10-28 17:12:58,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:12:58,910 INFO L481 AbstractCegarLoop]: Abstraction has 446 states and 615 transitions. [2020-10-28 17:12:58,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 17:12:58,910 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 615 transitions. [2020-10-28 17:12:58,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 17:12:58,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:12:58,912 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:12:58,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 17:12:58,912 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:12:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:12:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash 270696601, now seen corresponding path program 2 times [2020-10-28 17:12:58,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:12:58,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217964346] [2020-10-28 17:12:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:12:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:12:59,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:01,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:01,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 17:13:01,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:13:01,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2082 [2020-10-28 17:13:01,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:01,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:01,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 17:13:01,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:13:01,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-28 17:13:01,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:13:01,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:13:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:01,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:01,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:01,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:13:01,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:13:01,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:13:01,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:01,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:01,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:13:01,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:13:01,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:13:01,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:13:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 36 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:13:01,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217964346] [2020-10-28 17:13:01,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:13:01,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 17:13:01,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098251687] [2020-10-28 17:13:01,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 17:13:01,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:13:01,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 17:13:01,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 17:13:01,604 INFO L87 Difference]: Start difference. First operand 446 states and 615 transitions. Second operand 15 states. [2020-10-28 17:13:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:13:07,252 INFO L93 Difference]: Finished difference Result 507 states and 690 transitions. [2020-10-28 17:13:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 17:13:07,252 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 153 [2020-10-28 17:13:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:13:07,256 INFO L225 Difference]: With dead ends: 507 [2020-10-28 17:13:07,256 INFO L226 Difference]: Without dead ends: 504 [2020-10-28 17:13:07,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-28 17:13:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-10-28 17:13:07,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 468. [2020-10-28 17:13:07,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-10-28 17:13:07,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 645 transitions. [2020-10-28 17:13:07,283 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 645 transitions. Word has length 153 [2020-10-28 17:13:07,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:13:07,283 INFO L481 AbstractCegarLoop]: Abstraction has 468 states and 645 transitions. [2020-10-28 17:13:07,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 17:13:07,284 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 645 transitions. [2020-10-28 17:13:07,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-28 17:13:07,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:13:07,285 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 10, 10, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:13:07,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 17:13:07,285 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:13:07,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:13:07,286 INFO L82 PathProgramCache]: Analyzing trace with hash 278436178, now seen corresponding path program 3 times [2020-10-28 17:13:07,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:13:07,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562285175] [2020-10-28 17:13:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:13:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:07,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:09,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:09,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 17:13:09,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:13:09,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2555 [2020-10-28 17:13:09,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:09,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:09,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 17:13:09,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:13:09,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-28 17:13:09,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:13:10,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:13:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:10,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:10,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:10,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:13:10,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:13:10,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:13:10,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:10,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:10,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:13:10,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:13:10,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:13:10,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:13:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 98 proven. 470 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 17:13:10,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562285175] [2020-10-28 17:13:10,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:13:10,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 17:13:10,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705990029] [2020-10-28 17:13:10,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 17:13:10,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:13:10,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 17:13:10,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 17:13:10,146 INFO L87 Difference]: Start difference. First operand 468 states and 645 transitions. Second operand 11 states. [2020-10-28 17:13:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:13:12,331 INFO L93 Difference]: Finished difference Result 1049 states and 1438 transitions. [2020-10-28 17:13:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 17:13:12,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 170 [2020-10-28 17:13:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:13:12,335 INFO L225 Difference]: With dead ends: 1049 [2020-10-28 17:13:12,335 INFO L226 Difference]: Without dead ends: 587 [2020-10-28 17:13:12,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-28 17:13:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-28 17:13:12,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 490. [2020-10-28 17:13:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-10-28 17:13:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 676 transitions. [2020-10-28 17:13:12,364 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 676 transitions. Word has length 170 [2020-10-28 17:13:12,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:13:12,365 INFO L481 AbstractCegarLoop]: Abstraction has 490 states and 676 transitions. [2020-10-28 17:13:12,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 17:13:12,365 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 676 transitions. [2020-10-28 17:13:12,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-28 17:13:12,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:13:12,367 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 11, 11, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:13:12,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 17:13:12,367 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:13:12,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:13:12,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2128128954, now seen corresponding path program 3 times [2020-10-28 17:13:12,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:13:12,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476063624] [2020-10-28 17:13:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:13:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:12,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:16,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:16,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-28 17:13:16,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:13:16,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3856 [2020-10-28 17:13:16,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:16,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:16,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 17:13:16,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:13:16,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-28 17:13:16,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:13:17,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:13:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:17,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:17,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:17,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:13:17,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:13:17,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:13:17,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:17,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:17,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:13:17,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:13:17,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:13:17,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:13:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 45 proven. 656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:13:17,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476063624] [2020-10-28 17:13:17,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:13:17,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 17:13:17,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132743646] [2020-10-28 17:13:17,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 17:13:17,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:13:17,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 17:13:17,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-28 17:13:17,246 INFO L87 Difference]: Start difference. First operand 490 states and 676 transitions. Second operand 18 states. [2020-10-28 17:13:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:13:25,469 INFO L93 Difference]: Finished difference Result 585 states and 795 transitions. [2020-10-28 17:13:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 17:13:25,470 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2020-10-28 17:13:25,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:13:25,473 INFO L225 Difference]: With dead ends: 585 [2020-10-28 17:13:25,473 INFO L226 Difference]: Without dead ends: 582 [2020-10-28 17:13:25,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 17:13:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2020-10-28 17:13:25,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 534. [2020-10-28 17:13:25,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-10-28 17:13:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 736 transitions. [2020-10-28 17:13:25,503 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 736 transitions. Word has length 183 [2020-10-28 17:13:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:13:25,504 INFO L481 AbstractCegarLoop]: Abstraction has 534 states and 736 transitions. [2020-10-28 17:13:25,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 17:13:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 736 transitions. [2020-10-28 17:13:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-28 17:13:25,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:13:25,505 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 12, 12, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:13:25,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 17:13:25,506 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:13:25,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:13:25,506 INFO L82 PathProgramCache]: Analyzing trace with hash -980163512, now seen corresponding path program 3 times [2020-10-28 17:13:25,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:13:25,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038085707] [2020-10-28 17:13:25,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:13:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:25,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:29,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:29,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-28 17:13:29,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:13:29,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4016 [2020-10-28 17:13:29,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:29,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:29,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 17:13:29,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:13:29,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 185 [2020-10-28 17:13:29,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:13:30,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:13:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:30,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:30,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:30,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:13:30,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:13:30,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:13:30,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:30,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:30,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:13:30,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:13:30,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:13:30,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:13:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 48 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:13:30,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038085707] [2020-10-28 17:13:30,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:13:30,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 17:13:30,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159153397] [2020-10-28 17:13:30,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 17:13:30,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:13:30,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 17:13:30,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-28 17:13:30,326 INFO L87 Difference]: Start difference. First operand 534 states and 736 transitions. Second operand 19 states. [2020-10-28 17:13:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:13:39,198 INFO L93 Difference]: Finished difference Result 607 states and 825 transitions. [2020-10-28 17:13:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 17:13:39,199 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 199 [2020-10-28 17:13:39,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:13:39,203 INFO L225 Difference]: With dead ends: 607 [2020-10-28 17:13:39,203 INFO L226 Difference]: Without dead ends: 604 [2020-10-28 17:13:39,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 17:13:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-10-28 17:13:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 556. [2020-10-28 17:13:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-10-28 17:13:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 766 transitions. [2020-10-28 17:13:39,232 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 766 transitions. Word has length 199 [2020-10-28 17:13:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:13:39,232 INFO L481 AbstractCegarLoop]: Abstraction has 556 states and 766 transitions. [2020-10-28 17:13:39,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 17:13:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 766 transitions. [2020-10-28 17:13:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-28 17:13:39,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:13:39,235 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 13, 13, 8, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:13:39,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 17:13:39,235 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:13:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:13:39,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1787614845, now seen corresponding path program 4 times [2020-10-28 17:13:39,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:13:39,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27488516] [2020-10-28 17:13:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:13:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:39,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:44,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:44,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-28 17:13:44,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:13:44,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 17:13:44,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:44,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:44,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 17:13:44,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:13:44,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 194 [2020-10-28 17:13:44,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:13:44,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:13:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:44,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:44,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:44,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:13:44,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:13:44,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:13:44,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:44,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:44,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:13:44,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:13:44,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:13:44,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:13:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 128 proven. 842 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 17:13:44,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27488516] [2020-10-28 17:13:44,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:13:44,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 17:13:44,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611719918] [2020-10-28 17:13:44,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 17:13:44,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:13:44,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 17:13:44,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 17:13:44,673 INFO L87 Difference]: Start difference. First operand 556 states and 766 transitions. Second operand 13 states. [2020-10-28 17:13:47,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:13:47,347 INFO L93 Difference]: Finished difference Result 1237 states and 1694 transitions. [2020-10-28 17:13:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 17:13:47,349 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 216 [2020-10-28 17:13:47,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:13:47,353 INFO L225 Difference]: With dead ends: 1237 [2020-10-28 17:13:47,354 INFO L226 Difference]: Without dead ends: 687 [2020-10-28 17:13:47,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-28 17:13:47,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2020-10-28 17:13:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 578. [2020-10-28 17:13:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-28 17:13:47,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 797 transitions. [2020-10-28 17:13:47,387 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 797 transitions. Word has length 216 [2020-10-28 17:13:47,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:13:47,387 INFO L481 AbstractCegarLoop]: Abstraction has 578 states and 797 transitions. [2020-10-28 17:13:47,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 17:13:47,387 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 797 transitions. [2020-10-28 17:13:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-28 17:13:47,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:13:47,389 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 14, 14, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:13:47,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 17:13:47,390 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:13:47,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:13:47,390 INFO L82 PathProgramCache]: Analyzing trace with hash 689681193, now seen corresponding path program 4 times [2020-10-28 17:13:47,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:13:47,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252489] [2020-10-28 17:13:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:13:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:47,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:52,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:52,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-28 17:13:52,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:13:52,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-28 17:13:52,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:52,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:52,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 17:13:52,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:13:52,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 215 [2020-10-28 17:13:52,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:13:53,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:13:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:53,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:53,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:53,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:13:53,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:13:53,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:13:53,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:53,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:53,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:13:53,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:13:53,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:13:53,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:13:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 57 proven. 1086 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:13:53,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252489] [2020-10-28 17:13:53,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:13:53,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 17:13:53,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014692363] [2020-10-28 17:13:53,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 17:13:53,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:13:53,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 17:13:53,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-10-28 17:13:53,799 INFO L87 Difference]: Start difference. First operand 578 states and 797 transitions. Second operand 22 states. [2020-10-28 17:14:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:14:04,776 INFO L93 Difference]: Finished difference Result 686 states and 931 transitions. [2020-10-28 17:14:04,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 17:14:04,782 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 229 [2020-10-28 17:14:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:14:04,786 INFO L225 Difference]: With dead ends: 686 [2020-10-28 17:14:04,786 INFO L226 Difference]: Without dead ends: 683 [2020-10-28 17:14:04,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 17:14:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2020-10-28 17:14:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 622. [2020-10-28 17:14:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2020-10-28 17:14:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 857 transitions. [2020-10-28 17:14:04,822 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 857 transitions. Word has length 229 [2020-10-28 17:14:04,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:14:04,822 INFO L481 AbstractCegarLoop]: Abstraction has 622 states and 857 transitions. [2020-10-28 17:14:04,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 17:14:04,822 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 857 transitions. [2020-10-28 17:14:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-28 17:14:04,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:14:04,824 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 15, 15, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:14:04,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 17:14:04,825 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:14:04,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:14:04,825 INFO L82 PathProgramCache]: Analyzing trace with hash 680537527, now seen corresponding path program 4 times [2020-10-28 17:14:04,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:14:04,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843120429] [2020-10-28 17:14:04,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:14:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:14:04,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:14:10,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:14:10,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-28 17:14:10,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:14:10,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5172 [2020-10-28 17:14:10,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:14:10,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:14:10,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 17:14:10,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:14:10,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 231 [2020-10-28 17:14:10,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:14:11,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:14:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:14:11,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:14:11,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:14:11,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:14:11,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:14:11,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:14:11,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:14:11,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:14:11,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:14:11,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:14:11,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:14:11,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:14:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 60 proven. 1235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:14:11,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843120429] [2020-10-28 17:14:11,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:14:11,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 17:14:11,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441969875] [2020-10-28 17:14:11,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 17:14:11,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:14:11,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 17:14:11,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2020-10-28 17:14:11,309 INFO L87 Difference]: Start difference. First operand 622 states and 857 transitions. Second operand 23 states. [2020-10-28 17:14:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:14:22,499 INFO L93 Difference]: Finished difference Result 707 states and 960 transitions. [2020-10-28 17:14:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 17:14:22,499 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 245 [2020-10-28 17:14:22,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:14:22,502 INFO L225 Difference]: With dead ends: 707 [2020-10-28 17:14:22,503 INFO L226 Difference]: Without dead ends: 704 [2020-10-28 17:14:22,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=135, Invalid=1671, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 17:14:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2020-10-28 17:14:22,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 644. [2020-10-28 17:14:22,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2020-10-28 17:14:22,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 887 transitions. [2020-10-28 17:14:22,538 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 887 transitions. Word has length 245 [2020-10-28 17:14:22,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:14:22,538 INFO L481 AbstractCegarLoop]: Abstraction has 644 states and 887 transitions. [2020-10-28 17:14:22,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 17:14:22,538 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 887 transitions. [2020-10-28 17:14:22,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-28 17:14:22,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:14:22,541 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 16, 16, 10, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:14:22,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 17:14:22,541 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:14:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:14:22,541 INFO L82 PathProgramCache]: Analyzing trace with hash -558691340, now seen corresponding path program 5 times [2020-10-28 17:14:22,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:14:22,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935080994] [2020-10-28 17:14:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:14:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:14:22,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:14:27,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:14:27,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-28 17:14:27,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:14:27,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-28 17:14:27,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:14:27,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:14:27,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 17:14:27,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:14:27,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 240 [2020-10-28 17:14:27,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:14:27,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:14:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:14:27,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:14:27,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:14:27,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:14:27,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:14:27,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:14:27,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:14:27,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:14:27,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:14:27,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:14:27,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:14:27,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:14:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 158 proven. 1322 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-28 17:14:28,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935080994] [2020-10-28 17:14:28,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:14:28,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 17:14:28,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551205600] [2020-10-28 17:14:28,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 17:14:28,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:14:28,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 17:14:28,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 17:14:28,048 INFO L87 Difference]: Start difference. First operand 644 states and 887 transitions. Second operand 15 states. [2020-10-28 17:14:31,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:14:31,282 INFO L93 Difference]: Finished difference Result 1437 states and 1964 transitions. [2020-10-28 17:14:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 17:14:31,283 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 262 [2020-10-28 17:14:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:14:31,286 INFO L225 Difference]: With dead ends: 1437 [2020-10-28 17:14:31,286 INFO L226 Difference]: Without dead ends: 799 [2020-10-28 17:14:31,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-28 17:14:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2020-10-28 17:14:31,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 666. [2020-10-28 17:14:31,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2020-10-28 17:14:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 918 transitions. [2020-10-28 17:14:31,322 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 918 transitions. Word has length 262 [2020-10-28 17:14:31,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:14:31,322 INFO L481 AbstractCegarLoop]: Abstraction has 666 states and 918 transitions. [2020-10-28 17:14:31,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 17:14:31,323 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 918 transitions. [2020-10-28 17:14:31,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-28 17:14:31,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:14:31,325 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 17, 17, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:14:31,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 17:14:31,325 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:14:31,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:14:31,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1658777512, now seen corresponding path program 5 times [2020-10-28 17:14:31,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:14:31,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784888948] [2020-10-28 17:14:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:14:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:14:31,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:14:36,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:14:36,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-28 17:14:36,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:14:36,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-28 17:14:36,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:14:36,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:14:36,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 17:14:36,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:14:36,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 261 [2020-10-28 17:14:36,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:14:37,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:14:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:14:37,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:14:37,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:14:37,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:14:37,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:14:37,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 17:14:37,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:14:37,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:14:37,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:14:37,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:14:37,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:14:37,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:14:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 69 proven. 1624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:14:37,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784888948] [2020-10-28 17:14:37,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:14:37,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 17:14:37,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850225306] [2020-10-28 17:14:37,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 17:14:37,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:14:37,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 17:14:37,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-28 17:14:37,838 INFO L87 Difference]: Start difference. First operand 666 states and 918 transitions. Second operand 26 states. [2020-10-28 17:14:55,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:14:55,585 INFO L93 Difference]: Finished difference Result 785 states and 1065 transitions. [2020-10-28 17:14:55,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 17:14:55,586 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 275 [2020-10-28 17:14:55,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:14:55,592 INFO L225 Difference]: With dead ends: 785 [2020-10-28 17:14:55,592 INFO L226 Difference]: Without dead ends: 782 [2020-10-28 17:14:55,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 17:14:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2020-10-28 17:14:55,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 710. [2020-10-28 17:14:55,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 710 states. [2020-10-28 17:14:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 978 transitions. [2020-10-28 17:14:55,632 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 978 transitions. Word has length 275 [2020-10-28 17:14:55,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:14:55,632 INFO L481 AbstractCegarLoop]: Abstraction has 710 states and 978 transitions. [2020-10-28 17:14:55,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 17:14:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 978 transitions. [2020-10-28 17:14:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-28 17:14:55,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:14:55,635 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 18, 18, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:14:55,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 17:14:55,635 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:14:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:14:55,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2003520742, now seen corresponding path program 5 times [2020-10-28 17:14:55,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:14:55,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698469041] [2020-10-28 17:14:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:14:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:14:55,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:15:00,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:15:00,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-28 17:15:00,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:15:00,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-28 17:15:00,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:15:00,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:15:00,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 17:15:00,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 17:15:00,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 277 [2020-10-28 17:15:00,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:15:02,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:15:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:15:02,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:15:02,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:15:02,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:15:02,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:15:02,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:15:02,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:15:02,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:15:02,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:15:02,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:15:02,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:15:02,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:15:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 72 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:15:02,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698469041] [2020-10-28 17:15:02,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:15:02,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 17:15:02,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733278245] [2020-10-28 17:15:02,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 17:15:02,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:15:02,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 17:15:02,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=646, Unknown=0, NotChecked=0, Total=702 [2020-10-28 17:15:02,423 INFO L87 Difference]: Start difference. First operand 710 states and 978 transitions. Second operand 27 states.