./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e5dd58415aac7d1d5a1692f51a0046cae2819bd35dc6a9ac29c06647e84dab1f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:55:14,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:55:14,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:55:14,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:55:14,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:55:14,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:55:14,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:55:14,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:55:14,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:55:14,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:55:14,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:55:14,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:55:14,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:55:14,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:55:14,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:55:14,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:55:14,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:55:14,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:55:14,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:55:14,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:55:14,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:55:14,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:55:14,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:55:14,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:55:14,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:55:14,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:55:14,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:55:14,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:55:14,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:55:14,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:55:14,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:55:14,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:55:14,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:55:14,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:55:14,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:55:14,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:55:14,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:55:14,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:55:14,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:55:14,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:55:14,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:55:14,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:55:14,762 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:55:14,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:55:14,764 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:55:14,764 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:55:14,764 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:55:14,765 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:55:14,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:55:14,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:55:14,766 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:55:14,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:55:14,767 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:55:14,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:55:14,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:55:14,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:55:14,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:55:14,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:55:14,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:55:14,768 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:55:14,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:55:14,768 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:55:14,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:55:14,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:55:14,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:55:14,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:55:14,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:55:14,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:55:14,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:55:14,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:55:14,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:55:14,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:55:14,770 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:55:14,770 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:55:14,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:55:14,770 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5dd58415aac7d1d5a1692f51a0046cae2819bd35dc6a9ac29c06647e84dab1f [2021-12-28 01:55:15,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:55:15,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:55:15,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:55:15,083 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:55:15,084 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:55:15,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c [2021-12-28 01:55:15,152 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54935e11a/044a000494b14baa8ae8b9eadfb270e2/FLAGae3def448 [2021-12-28 01:55:15,873 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:55:15,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c [2021-12-28 01:55:15,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54935e11a/044a000494b14baa8ae8b9eadfb270e2/FLAGae3def448 [2021-12-28 01:55:16,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54935e11a/044a000494b14baa8ae8b9eadfb270e2 [2021-12-28 01:55:16,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:55:16,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:55:16,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:55:16,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:55:16,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:55:16,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:55:16" (1/1) ... [2021-12-28 01:55:16,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc13114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:55:16, skipping insertion in model container [2021-12-28 01:55:16,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:55:16" (1/1) ... [2021-12-28 01:55:16,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:55:16,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:55:17,461 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c[377340,377353] [2021-12-28 01:55:17,483 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c[383339,383352] [2021-12-28 01:55:17,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:55:17,586 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:55:18,310 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c[377340,377353] [2021-12-28 01:55:18,317 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label44+token_ring.01.cil-1.c[383339,383352] [2021-12-28 01:55:18,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:55:18,372 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:55:18,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:55:18 WrapperNode [2021-12-28 01:55:18,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:55:18,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:55:18,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:55:18,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:55:18,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:55:18" (1/1) ... [2021-12-28 01:55:18,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:55:18" (1/1) ... [2021-12-28 01:55:18,701 INFO L137 Inliner]: procedures = 46, calls = 44, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 12561 [2021-12-28 01:55:18,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:55:18,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:55:18,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:55:18,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:55:18,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:55:18" (1/1) ... [2021-12-28 01:55:18,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:55:18" (1/1) ... [2021-12-28 01:55:18,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:55:18" (1/1) ... [2021-12-28 01:55:18,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:55:18" (1/1) ... [2021-12-28 01:55:19,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:55:18" (1/1) ... [2021-12-28 01:55:19,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:55:18" (1/1) ... [2021-12-28 01:55:19,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:55:18" (1/1) ... [2021-12-28 01:55:19,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:55:19,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:55:19,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:55:19,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:55:19,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:55:18" (1/1) ... [2021-12-28 01:55:19,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:55:19,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:55:19,181 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 01:55:19,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 01:55:19,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:55:19,246 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-28 01:55:19,246 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-28 01:55:19,247 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-28 01:55:19,247 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-28 01:55:19,247 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 01:55:19,247 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 01:55:19,247 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-28 01:55:19,247 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-28 01:55:19,247 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-28 01:55:19,247 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-28 01:55:19,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:55:19,248 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-28 01:55:19,248 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-28 01:55:19,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:55:19,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:55:19,387 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:55:19,388 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:55:24,150 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:55:24,168 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:55:24,169 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-28 01:55:24,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:55:24 BoogieIcfgContainer [2021-12-28 01:55:24,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:55:24,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:55:24,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:55:24,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:55:24,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:55:16" (1/3) ... [2021-12-28 01:55:24,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9cec9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:55:24, skipping insertion in model container [2021-12-28 01:55:24,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:55:18" (2/3) ... [2021-12-28 01:55:24,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9cec9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:55:24, skipping insertion in model container [2021-12-28 01:55:24,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:55:24" (3/3) ... [2021-12-28 01:55:24,179 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label44+token_ring.01.cil-1.c [2021-12-28 01:55:24,182 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:55:24,182 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 01:55:24,218 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:55:24,222 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 01:55:24,223 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 01:55:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 2290 states, 2266 states have (on average 1.8587819947043247) internal successors, (4212), 2269 states have internal predecessors, (4212), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-28 01:55:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:55:24,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:24,261 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:24,261 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:24,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:24,265 INFO L85 PathProgramCache]: Analyzing trace with hash -36301034, now seen corresponding path program 1 times [2021-12-28 01:55:24,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:24,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128698422] [2021-12-28 01:55:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:24,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:24,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:24,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:24,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:24,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:24,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:55:24,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:24,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128698422] [2021-12-28 01:55:24,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128698422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:24,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:55:24,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:55:24,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928177542] [2021-12-28 01:55:24,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:24,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:55:24,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:24,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:55:24,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:55:24,473 INFO L87 Difference]: Start difference. First operand has 2290 states, 2266 states have (on average 1.8587819947043247) internal successors, (4212), 2269 states have internal predecessors, (4212), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:55:25,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:25,005 INFO L93 Difference]: Finished difference Result 4705 states and 8678 transitions. [2021-12-28 01:55:25,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:55:25,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 01:55:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:25,039 INFO L225 Difference]: With dead ends: 4705 [2021-12-28 01:55:25,039 INFO L226 Difference]: Without dead ends: 2354 [2021-12-28 01:55:25,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:55:25,052 INFO L933 BasicCegarLoop]: 4187 mSDtfsCounter, 4313 mSDsluCounter, 12342 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4321 SdHoareTripleChecker+Valid, 16529 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:25,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4321 Valid, 16529 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:55:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2021-12-28 01:55:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2313. [2021-12-28 01:55:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2273 states have (on average 1.8376594808622966) internal successors, (4177), 2276 states have internal predecessors, (4177), 25 states have call successors, (25), 12 states have call predecessors, (25), 13 states have return successors, (28), 25 states have call predecessors, (28), 25 states have call successors, (28) [2021-12-28 01:55:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 4230 transitions. [2021-12-28 01:55:25,158 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 4230 transitions. Word has length 57 [2021-12-28 01:55:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:25,159 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 4230 transitions. [2021-12-28 01:55:25,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:55:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 4230 transitions. [2021-12-28 01:55:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:55:25,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:25,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:25,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:55:25,162 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:25,163 INFO L85 PathProgramCache]: Analyzing trace with hash -948253030, now seen corresponding path program 1 times [2021-12-28 01:55:25,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:25,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000021009] [2021-12-28 01:55:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:25,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:25,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:25,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:25,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:25,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:25,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:55:25,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:25,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000021009] [2021-12-28 01:55:25,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000021009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:25,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:55:25,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:55:25,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449732832] [2021-12-28 01:55:25,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:25,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:55:25,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:25,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:55:25,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:55:25,308 INFO L87 Difference]: Start difference. First operand 2313 states and 4230 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:55:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:25,961 INFO L93 Difference]: Finished difference Result 2645 states and 4704 transitions. [2021-12-28 01:55:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:55:25,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 01:55:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:25,970 INFO L225 Difference]: With dead ends: 2645 [2021-12-28 01:55:25,971 INFO L226 Difference]: Without dead ends: 2462 [2021-12-28 01:55:25,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:55:25,973 INFO L933 BasicCegarLoop]: 4176 mSDtfsCounter, 4231 mSDsluCounter, 16299 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4239 SdHoareTripleChecker+Valid, 20475 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:25,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4239 Valid, 20475 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 01:55:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-12-28 01:55:26,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2398. [2021-12-28 01:55:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2341 states have (on average 1.8248611704399829) internal successors, (4272), 2345 states have internal predecessors, (4272), 35 states have call successors, (35), 18 states have call predecessors, (35), 20 states have return successors, (40), 36 states have call predecessors, (40), 35 states have call successors, (40) [2021-12-28 01:55:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 4347 transitions. [2021-12-28 01:55:26,014 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 4347 transitions. Word has length 57 [2021-12-28 01:55:26,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:26,014 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 4347 transitions. [2021-12-28 01:55:26,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:55:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 4347 transitions. [2021-12-28 01:55:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:55:26,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:26,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:26,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:55:26,016 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:26,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1297326424, now seen corresponding path program 1 times [2021-12-28 01:55:26,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:26,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160125401] [2021-12-28 01:55:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:26,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:26,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:26,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:26,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:26,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:26,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:55:26,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:26,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160125401] [2021-12-28 01:55:26,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160125401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:26,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:55:26,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:55:26,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067515633] [2021-12-28 01:55:26,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:26,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:55:26,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:26,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:55:26,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:55:26,077 INFO L87 Difference]: Start difference. First operand 2398 states and 4347 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:55:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:26,576 INFO L93 Difference]: Finished difference Result 2981 states and 5171 transitions. [2021-12-28 01:55:26,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:55:26,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 01:55:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:26,585 INFO L225 Difference]: With dead ends: 2981 [2021-12-28 01:55:26,586 INFO L226 Difference]: Without dead ends: 2713 [2021-12-28 01:55:26,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:55:26,588 INFO L933 BasicCegarLoop]: 4166 mSDtfsCounter, 4285 mSDsluCounter, 16291 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4295 SdHoareTripleChecker+Valid, 20457 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:26,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4295 Valid, 20457 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:55:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-28 01:55:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2563. [2021-12-28 01:55:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2474 states have (on average 1.8023443815683104) internal successors, (4459), 2480 states have internal predecessors, (4459), 53 states have call successors, (53), 30 states have call predecessors, (53), 34 states have return successors, (66), 56 states have call predecessors, (66), 53 states have call successors, (66) [2021-12-28 01:55:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 4578 transitions. [2021-12-28 01:55:26,638 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 4578 transitions. Word has length 57 [2021-12-28 01:55:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:26,638 INFO L470 AbstractCegarLoop]: Abstraction has 2563 states and 4578 transitions. [2021-12-28 01:55:26,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:55:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 4578 transitions. [2021-12-28 01:55:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:55:26,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:26,640 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:26,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:55:26,641 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:26,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:26,641 INFO L85 PathProgramCache]: Analyzing trace with hash 399933146, now seen corresponding path program 1 times [2021-12-28 01:55:26,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:26,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776613823] [2021-12-28 01:55:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:26,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:26,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:26,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:26,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:26,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:26,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:55:26,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:26,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776613823] [2021-12-28 01:55:26,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776613823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:26,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:55:26,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:55:26,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470958346] [2021-12-28 01:55:26,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:26,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:55:26,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:26,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:55:26,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:55:26,700 INFO L87 Difference]: Start difference. First operand 2563 states and 4578 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:55:27,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:27,238 INFO L93 Difference]: Finished difference Result 3503 states and 5902 transitions. [2021-12-28 01:55:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:55:27,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 01:55:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:27,249 INFO L225 Difference]: With dead ends: 3503 [2021-12-28 01:55:27,249 INFO L226 Difference]: Without dead ends: 3070 [2021-12-28 01:55:27,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:55:27,252 INFO L933 BasicCegarLoop]: 4167 mSDtfsCounter, 4228 mSDsluCounter, 16273 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4235 SdHoareTripleChecker+Valid, 20440 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:27,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4235 Valid, 20440 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 01:55:27,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-12-28 01:55:27,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2862. [2021-12-28 01:55:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2715 states have (on average 1.7661141804788214) internal successors, (4795), 2725 states have internal predecessors, (4795), 85 states have call successors, (85), 52 states have call predecessors, (85), 60 states have return successors, (120), 92 states have call predecessors, (120), 85 states have call successors, (120) [2021-12-28 01:55:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 5000 transitions. [2021-12-28 01:55:27,310 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 5000 transitions. Word has length 57 [2021-12-28 01:55:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:27,310 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 5000 transitions. [2021-12-28 01:55:27,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:55:27,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 5000 transitions. [2021-12-28 01:55:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:55:27,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:27,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:27,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:55:27,313 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:27,313 INFO L85 PathProgramCache]: Analyzing trace with hash 648079640, now seen corresponding path program 1 times [2021-12-28 01:55:27,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:27,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805956014] [2021-12-28 01:55:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:27,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:27,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:27,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:27,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:27,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:27,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:55:27,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:27,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805956014] [2021-12-28 01:55:27,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805956014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:27,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:55:27,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:55:27,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550394530] [2021-12-28 01:55:27,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:27,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:55:27,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:55:27,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:55:27,363 INFO L87 Difference]: Start difference. First operand 2862 states and 5000 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:55:27,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:27,808 INFO L93 Difference]: Finished difference Result 4199 states and 6894 transitions. [2021-12-28 01:55:27,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:55:27,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 01:55:27,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:27,819 INFO L225 Difference]: With dead ends: 4199 [2021-12-28 01:55:27,820 INFO L226 Difference]: Without dead ends: 3468 [2021-12-28 01:55:27,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-28 01:55:27,824 INFO L933 BasicCegarLoop]: 4213 mSDtfsCounter, 4340 mSDsluCounter, 12156 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4363 SdHoareTripleChecker+Valid, 16369 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:27,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4363 Valid, 16369 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:55:27,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2021-12-28 01:55:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 3263. [2021-12-28 01:55:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3033 states have (on average 1.7213979558193209) internal successors, (5221), 3052 states have internal predecessors, (5221), 134 states have call successors, (134), 82 states have call predecessors, (134), 94 states have return successors, (179), 136 states have call predecessors, (179), 134 states have call successors, (179) [2021-12-28 01:55:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 5534 transitions. [2021-12-28 01:55:27,896 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 5534 transitions. Word has length 57 [2021-12-28 01:55:27,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:27,897 INFO L470 AbstractCegarLoop]: Abstraction has 3263 states and 5534 transitions. [2021-12-28 01:55:27,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:55:27,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 5534 transitions. [2021-12-28 01:55:27,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-28 01:55:27,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:27,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:27,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:55:27,901 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:27,901 INFO L85 PathProgramCache]: Analyzing trace with hash 12281189, now seen corresponding path program 1 times [2021-12-28 01:55:27,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:27,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725051027] [2021-12-28 01:55:27,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:27,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:27,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:27,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:27,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 01:55:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 01:55:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 01:55:28,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:28,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725051027] [2021-12-28 01:55:28,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725051027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:55:28,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482196615] [2021-12-28 01:55:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:28,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:55:28,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:55:28,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:55:28,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 01:55:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:55:28,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:55:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 01:55:28,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:55:28,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482196615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:28,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:55:28,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:55:28,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23305727] [2021-12-28 01:55:28,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:28,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:55:28,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:28,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:55:28,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:55:28,404 INFO L87 Difference]: Start difference. First operand 3263 states and 5534 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:55:28,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:28,477 INFO L93 Difference]: Finished difference Result 5442 states and 8608 transitions. [2021-12-28 01:55:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:55:28,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 92 [2021-12-28 01:55:28,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:28,492 INFO L225 Difference]: With dead ends: 5442 [2021-12-28 01:55:28,492 INFO L226 Difference]: Without dead ends: 4311 [2021-12-28 01:55:28,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:55:28,497 INFO L933 BasicCegarLoop]: 4217 mSDtfsCounter, 114 mSDsluCounter, 4096 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 8313 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:28,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 8313 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:55:28,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-12-28 01:55:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 4311. [2021-12-28 01:55:28,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4311 states, 3872 states have (on average 1.6417871900826446) internal successors, (6357), 3904 states have internal predecessors, (6357), 253 states have call successors, (253), 160 states have call predecessors, (253), 184 states have return successors, (376), 262 states have call predecessors, (376), 253 states have call successors, (376) [2021-12-28 01:55:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4311 states to 4311 states and 6986 transitions. [2021-12-28 01:55:28,594 INFO L78 Accepts]: Start accepts. Automaton has 4311 states and 6986 transitions. Word has length 92 [2021-12-28 01:55:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:28,594 INFO L470 AbstractCegarLoop]: Abstraction has 4311 states and 6986 transitions. [2021-12-28 01:55:28,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:55:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 4311 states and 6986 transitions. [2021-12-28 01:55:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-28 01:55:28,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:28,599 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:28,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 01:55:28,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-28 01:55:28,819 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:28,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:28,819 INFO L85 PathProgramCache]: Analyzing trace with hash -788169551, now seen corresponding path program 1 times [2021-12-28 01:55:28,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:28,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004329749] [2021-12-28 01:55:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:28,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 01:55:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-28 01:55:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-28 01:55:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-28 01:55:28,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:28,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004329749] [2021-12-28 01:55:28,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004329749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:55:28,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541329772] [2021-12-28 01:55:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:28,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:55:28,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:55:28,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:55:28,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 01:55:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:29,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:55:29,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:55:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 01:55:29,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:55:29,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541329772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:29,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:55:29,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 01:55:29,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15441869] [2021-12-28 01:55:29,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:29,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:55:29,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:29,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:55:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:55:29,209 INFO L87 Difference]: Start difference. First operand 4311 states and 6986 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-28 01:55:29,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:29,330 INFO L93 Difference]: Finished difference Result 8527 states and 12855 transitions. [2021-12-28 01:55:29,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:55:29,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 118 [2021-12-28 01:55:29,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:29,368 INFO L225 Difference]: With dead ends: 8527 [2021-12-28 01:55:29,368 INFO L226 Difference]: Without dead ends: 6351 [2021-12-28 01:55:29,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:55:29,376 INFO L933 BasicCegarLoop]: 4117 mSDtfsCounter, 4026 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4026 SdHoareTripleChecker+Valid, 4237 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:29,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4026 Valid, 4237 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:55:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-12-28 01:55:29,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 6293. [2021-12-28 01:55:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6293 states, 5460 states have (on average 1.5576923076923077) internal successors, (8505), 5521 states have internal predecessors, (8505), 473 states have call successors, (473), 310 states have call predecessors, (473), 358 states have return successors, (688), 477 states have call predecessors, (688), 473 states have call successors, (688) [2021-12-28 01:55:29,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6293 states to 6293 states and 9666 transitions. [2021-12-28 01:55:29,548 INFO L78 Accepts]: Start accepts. Automaton has 6293 states and 9666 transitions. Word has length 118 [2021-12-28 01:55:29,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:29,549 INFO L470 AbstractCegarLoop]: Abstraction has 6293 states and 9666 transitions. [2021-12-28 01:55:29,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-28 01:55:29,550 INFO L276 IsEmpty]: Start isEmpty. Operand 6293 states and 9666 transitions. [2021-12-28 01:55:29,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-28 01:55:29,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:29,558 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:29,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 01:55:29,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-28 01:55:29,777 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:29,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:29,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1080279049, now seen corresponding path program 1 times [2021-12-28 01:55:29,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:29,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550607421] [2021-12-28 01:55:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:29,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:29,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:29,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:29,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:29,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:29,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:29,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:55:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:29,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 01:55:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:29,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:29,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-28 01:55:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:29,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:29,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 01:55:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-28 01:55:29,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:29,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550607421] [2021-12-28 01:55:29,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550607421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:55:29,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146973275] [2021-12-28 01:55:29,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:29,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:55:29,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:55:29,896 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:55:29,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 01:55:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:29,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 01:55:29,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:55:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-28 01:55:30,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:55:30,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146973275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:30,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:55:30,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:55:30,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153519694] [2021-12-28 01:55:30,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:30,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:55:30,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:30,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:55:30,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:55:30,170 INFO L87 Difference]: Start difference. First operand 6293 states and 9666 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 01:55:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:30,372 INFO L93 Difference]: Finished difference Result 9515 states and 14095 transitions. [2021-12-28 01:55:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:55:30,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 134 [2021-12-28 01:55:30,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:30,394 INFO L225 Difference]: With dead ends: 9515 [2021-12-28 01:55:30,394 INFO L226 Difference]: Without dead ends: 6621 [2021-12-28 01:55:30,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:55:30,406 INFO L933 BasicCegarLoop]: 4120 mSDtfsCounter, 4059 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4059 SdHoareTripleChecker+Valid, 4248 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:30,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4059 Valid, 4248 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:55:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6621 states. [2021-12-28 01:55:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6621 to 6583. [2021-12-28 01:55:30,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 5718 states have (on average 1.5318293109478838) internal successors, (8759), 5779 states have internal predecessors, (8759), 479 states have call successors, (479), 336 states have call predecessors, (479), 384 states have return successors, (720), 483 states have call predecessors, (720), 479 states have call successors, (720) [2021-12-28 01:55:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 9958 transitions. [2021-12-28 01:55:30,617 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 9958 transitions. Word has length 134 [2021-12-28 01:55:30,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:30,617 INFO L470 AbstractCegarLoop]: Abstraction has 6583 states and 9958 transitions. [2021-12-28 01:55:30,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 01:55:30,618 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 9958 transitions. [2021-12-28 01:55:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 01:55:30,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:30,629 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:30,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 01:55:30,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:55:30,844 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:30,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:30,844 INFO L85 PathProgramCache]: Analyzing trace with hash 703612430, now seen corresponding path program 1 times [2021-12-28 01:55:30,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:30,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025562634] [2021-12-28 01:55:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:30,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:30,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:30,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:30,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:30,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:30,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:30,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:55:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:30,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:55:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:30,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:30,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:55:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:30,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:30,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-28 01:55:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-28 01:55:30,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:30,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025562634] [2021-12-28 01:55:30,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025562634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:55:30,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467702374] [2021-12-28 01:55:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:30,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:55:30,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:55:30,965 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:55:30,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 01:55:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:31,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 01:55:31,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:55:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 01:55:31,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:55:31,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467702374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:31,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:55:31,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:55:31,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39076403] [2021-12-28 01:55:31,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:31,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:55:31,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:31,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:55:31,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:55:31,228 INFO L87 Difference]: Start difference. First operand 6583 states and 9958 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 01:55:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:31,369 INFO L93 Difference]: Finished difference Result 8950 states and 13283 transitions. [2021-12-28 01:55:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:55:31,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2021-12-28 01:55:31,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:31,387 INFO L225 Difference]: With dead ends: 8950 [2021-12-28 01:55:31,388 INFO L226 Difference]: Without dead ends: 6617 [2021-12-28 01:55:31,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:55:31,398 INFO L933 BasicCegarLoop]: 4205 mSDtfsCounter, 99 mSDsluCounter, 4087 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 8292 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:31,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 8292 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:55:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-12-28 01:55:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 6559. [2021-12-28 01:55:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6559 states, 5694 states have (on average 1.5175623463294696) internal successors, (8641), 5755 states have internal predecessors, (8641), 479 states have call successors, (479), 336 states have call predecessors, (479), 384 states have return successors, (720), 483 states have call predecessors, (720), 479 states have call successors, (720) [2021-12-28 01:55:31,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6559 states to 6559 states and 9840 transitions. [2021-12-28 01:55:31,602 INFO L78 Accepts]: Start accepts. Automaton has 6559 states and 9840 transitions. Word has length 135 [2021-12-28 01:55:31,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:31,603 INFO L470 AbstractCegarLoop]: Abstraction has 6559 states and 9840 transitions. [2021-12-28 01:55:31,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 01:55:31,603 INFO L276 IsEmpty]: Start isEmpty. Operand 6559 states and 9840 transitions. [2021-12-28 01:55:31,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 01:55:31,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:31,612 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:31,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-28 01:55:31,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:55:31,847 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:31,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1285829934, now seen corresponding path program 1 times [2021-12-28 01:55:31,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:31,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727329975] [2021-12-28 01:55:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:31,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:31,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:31,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:31,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:31,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:31,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:31,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:55:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:31,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:55:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:31,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:31,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:55:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:31,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:31,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-28 01:55:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-28 01:55:31,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:31,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727329975] [2021-12-28 01:55:31,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727329975] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:55:31,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067457485] [2021-12-28 01:55:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:31,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:55:31,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:55:31,945 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:55:31,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 01:55:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:32,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:55:32,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:55:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 01:55:32,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:55:32,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067457485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:32,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:55:32,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:55:32,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975231005] [2021-12-28 01:55:32,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:32,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:55:32,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:32,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:55:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:55:32,205 INFO L87 Difference]: Start difference. First operand 6559 states and 9840 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 01:55:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:32,383 INFO L93 Difference]: Finished difference Result 9831 states and 14294 transitions. [2021-12-28 01:55:32,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:55:32,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 135 [2021-12-28 01:55:32,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:32,398 INFO L225 Difference]: With dead ends: 9831 [2021-12-28 01:55:32,398 INFO L226 Difference]: Without dead ends: 5941 [2021-12-28 01:55:32,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:55:32,408 INFO L933 BasicCegarLoop]: 4100 mSDtfsCounter, 4077 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4077 SdHoareTripleChecker+Valid, 4124 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:32,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4077 Valid, 4124 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:55:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5941 states. [2021-12-28 01:55:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5941 to 5711. [2021-12-28 01:55:32,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5711 states, 5012 states have (on average 1.5157621707901037) internal successors, (7597), 5057 states have internal predecessors, (7597), 391 states have call successors, (391), 274 states have call predecessors, (391), 306 states have return successors, (510), 387 states have call predecessors, (510), 391 states have call successors, (510) [2021-12-28 01:55:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5711 states to 5711 states and 8498 transitions. [2021-12-28 01:55:32,551 INFO L78 Accepts]: Start accepts. Automaton has 5711 states and 8498 transitions. Word has length 135 [2021-12-28 01:55:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:32,551 INFO L470 AbstractCegarLoop]: Abstraction has 5711 states and 8498 transitions. [2021-12-28 01:55:32,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 01:55:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 5711 states and 8498 transitions. [2021-12-28 01:55:32,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:55:32,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:32,558 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:32,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 01:55:32,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-28 01:55:32,772 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:32,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:32,772 INFO L85 PathProgramCache]: Analyzing trace with hash -371269117, now seen corresponding path program 1 times [2021-12-28 01:55:32,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:32,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216506384] [2021-12-28 01:55:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:32,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:32,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:32,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:32,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:32,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:32,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:32,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:55:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:32,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:55:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:32,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:32,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:55:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:32,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:32,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 01:55:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-28 01:55:32,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:32,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216506384] [2021-12-28 01:55:32,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216506384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:55:32,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952871516] [2021-12-28 01:55:32,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:32,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:55:32,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:55:32,886 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:55:32,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 01:55:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:32,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 01:55:32,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:55:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-28 01:55:33,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:55:33,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952871516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:33,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:55:33,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-28 01:55:33,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751623662] [2021-12-28 01:55:33,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:33,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:55:33,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:33,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:55:33,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:55:33,207 INFO L87 Difference]: Start difference. First operand 5711 states and 8498 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:55:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:33,390 INFO L93 Difference]: Finished difference Result 7117 states and 10335 transitions. [2021-12-28 01:55:33,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:55:33,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-28 01:55:33,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:33,401 INFO L225 Difference]: With dead ends: 7117 [2021-12-28 01:55:33,401 INFO L226 Difference]: Without dead ends: 4791 [2021-12-28 01:55:33,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:55:33,408 INFO L933 BasicCegarLoop]: 4078 mSDtfsCounter, 4094 mSDsluCounter, 8053 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4102 SdHoareTripleChecker+Valid, 12131 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:33,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4102 Valid, 12131 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:55:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2021-12-28 01:55:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 4779. [2021-12-28 01:55:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4779 states, 4262 states have (on average 1.544580009385265) internal successors, (6583), 4289 states have internal predecessors, (6583), 295 states have call successors, (295), 204 states have call predecessors, (295), 220 states have return successors, (354), 289 states have call predecessors, (354), 295 states have call successors, (354) [2021-12-28 01:55:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4779 states to 4779 states and 7232 transitions. [2021-12-28 01:55:33,527 INFO L78 Accepts]: Start accepts. Automaton has 4779 states and 7232 transitions. Word has length 136 [2021-12-28 01:55:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:33,527 INFO L470 AbstractCegarLoop]: Abstraction has 4779 states and 7232 transitions. [2021-12-28 01:55:33,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:55:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4779 states and 7232 transitions. [2021-12-28 01:55:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:55:33,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:33,531 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:33,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 01:55:33,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:55:33,750 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:33,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:33,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1678411515, now seen corresponding path program 1 times [2021-12-28 01:55:33,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:33,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158086491] [2021-12-28 01:55:33,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:33,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:33,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:33,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:33,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:33,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:33,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:33,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:55:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:33,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:55:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:33,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:33,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:55:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:33,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:33,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 01:55:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-28 01:55:33,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:33,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158086491] [2021-12-28 01:55:33,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158086491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:55:33,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187447106] [2021-12-28 01:55:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:33,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:55:33,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:55:33,840 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:55:33,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 01:55:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:33,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 01:55:33,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:55:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-28 01:55:34,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:55:34,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187447106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:34,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:55:34,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-28 01:55:34,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711117917] [2021-12-28 01:55:34,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:34,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:55:34,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:34,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:55:34,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:55:34,132 INFO L87 Difference]: Start difference. First operand 4779 states and 7232 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:55:34,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:34,446 INFO L93 Difference]: Finished difference Result 7083 states and 10147 transitions. [2021-12-28 01:55:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:55:34,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-28 01:55:34,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:34,456 INFO L225 Difference]: With dead ends: 7083 [2021-12-28 01:55:34,456 INFO L226 Difference]: Without dead ends: 4732 [2021-12-28 01:55:34,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-28 01:55:34,462 INFO L933 BasicCegarLoop]: 4090 mSDtfsCounter, 4115 mSDsluCounter, 8048 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4123 SdHoareTripleChecker+Valid, 12138 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:34,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4123 Valid, 12138 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:55:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2021-12-28 01:55:34,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 3773. [2021-12-28 01:55:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3773 states, 3468 states have (on average 1.6000576701268743) internal successors, (5549), 3483 states have internal predecessors, (5549), 173 states have call successors, (173), 122 states have call predecessors, (173), 130 states have return successors, (203), 169 states have call predecessors, (203), 173 states have call successors, (203) [2021-12-28 01:55:34,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3773 states to 3773 states and 5925 transitions. [2021-12-28 01:55:34,557 INFO L78 Accepts]: Start accepts. Automaton has 3773 states and 5925 transitions. Word has length 136 [2021-12-28 01:55:34,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:34,558 INFO L470 AbstractCegarLoop]: Abstraction has 3773 states and 5925 transitions. [2021-12-28 01:55:34,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:55:34,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3773 states and 5925 transitions. [2021-12-28 01:55:34,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:55:34,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:34,560 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:34,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 01:55:34,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:55:34,777 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:34,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:34,777 INFO L85 PathProgramCache]: Analyzing trace with hash 219085251, now seen corresponding path program 1 times [2021-12-28 01:55:34,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:34,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345190374] [2021-12-28 01:55:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:34,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:34,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:34,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:34,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:34,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:34,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:34,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:55:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:34,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:55:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:34,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:34,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:55:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:34,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:34,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 01:55:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:34,890 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-28 01:55:34,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:34,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345190374] [2021-12-28 01:55:34,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345190374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:55:34,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169380107] [2021-12-28 01:55:34,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:34,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:55:34,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:55:34,908 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:55:34,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 01:55:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:34,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 01:55:34,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:55:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-28 01:55:35,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:55:35,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169380107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:35,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:55:35,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-28 01:55:35,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157023138] [2021-12-28 01:55:35,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:35,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:55:35,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:35,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:55:35,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:55:35,172 INFO L87 Difference]: Start difference. First operand 3773 states and 5925 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:55:35,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:35,286 INFO L93 Difference]: Finished difference Result 4900 states and 7289 transitions. [2021-12-28 01:55:35,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:55:35,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-28 01:55:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:35,292 INFO L225 Difference]: With dead ends: 4900 [2021-12-28 01:55:35,293 INFO L226 Difference]: Without dead ends: 3258 [2021-12-28 01:55:35,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:55:35,297 INFO L933 BasicCegarLoop]: 4090 mSDtfsCounter, 48 mSDsluCounter, 12279 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 16369 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:35,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 16369 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:55:35,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2021-12-28 01:55:35,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 3222. [2021-12-28 01:55:35,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3222 states, 3024 states have (on average 1.6537698412698412) internal successors, (5001), 3035 states have internal predecessors, (5001), 110 states have call successors, (110), 79 states have call predecessors, (110), 86 states have return successors, (121), 108 states have call predecessors, (121), 110 states have call successors, (121) [2021-12-28 01:55:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3222 states to 3222 states and 5232 transitions. [2021-12-28 01:55:35,368 INFO L78 Accepts]: Start accepts. Automaton has 3222 states and 5232 transitions. Word has length 136 [2021-12-28 01:55:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:35,369 INFO L470 AbstractCegarLoop]: Abstraction has 3222 states and 5232 transitions. [2021-12-28 01:55:35,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:55:35,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3222 states and 5232 transitions. [2021-12-28 01:55:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:55:35,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:35,387 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:35,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 01:55:35,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-28 01:55:35,604 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:35,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:35,604 INFO L85 PathProgramCache]: Analyzing trace with hash 731116351, now seen corresponding path program 1 times [2021-12-28 01:55:35,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:35,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451047842] [2021-12-28 01:55:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:35,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:35,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:35,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:35,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:35,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:35,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:35,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:55:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:35,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:55:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:35,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:35,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:55:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:35,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:35,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 01:55:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-28 01:55:35,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:35,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451047842] [2021-12-28 01:55:35,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451047842] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:55:35,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88523172] [2021-12-28 01:55:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:35,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:55:35,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:55:35,680 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:55:35,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 01:55:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:35,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 01:55:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:55:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-28 01:55:35,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:55:35,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88523172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:35,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:55:35,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-28 01:55:35,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270686160] [2021-12-28 01:55:35,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:35,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:55:35,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:35,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:55:35,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:55:35,884 INFO L87 Difference]: Start difference. First operand 3222 states and 5232 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:55:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:35,964 INFO L93 Difference]: Finished difference Result 4341 states and 6571 transitions. [2021-12-28 01:55:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:55:35,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-28 01:55:35,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:35,970 INFO L225 Difference]: With dead ends: 4341 [2021-12-28 01:55:35,970 INFO L226 Difference]: Without dead ends: 3250 [2021-12-28 01:55:35,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:55:35,973 INFO L933 BasicCegarLoop]: 4089 mSDtfsCounter, 10 mSDsluCounter, 12266 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16355 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:35,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 16355 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:55:35,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2021-12-28 01:55:36,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3234. [2021-12-28 01:55:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3036 states have (on average 1.6442687747035574) internal successors, (4992), 3047 states have internal predecessors, (4992), 110 states have call successors, (110), 79 states have call predecessors, (110), 86 states have return successors, (121), 108 states have call predecessors, (121), 110 states have call successors, (121) [2021-12-28 01:55:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 5223 transitions. [2021-12-28 01:55:36,043 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 5223 transitions. Word has length 136 [2021-12-28 01:55:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:36,044 INFO L470 AbstractCegarLoop]: Abstraction has 3234 states and 5223 transitions. [2021-12-28 01:55:36,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:55:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 5223 transitions. [2021-12-28 01:55:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:55:36,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:36,047 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:36,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 01:55:36,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 01:55:36,259 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash -26178757, now seen corresponding path program 1 times [2021-12-28 01:55:36,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:36,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188428843] [2021-12-28 01:55:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:36,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:55:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:55:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:55:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 01:55:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-28 01:55:36,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:36,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188428843] [2021-12-28 01:55:36,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188428843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:36,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:55:36,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:55:36,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922794169] [2021-12-28 01:55:36,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:36,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:55:36,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:36,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:55:36,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:55:36,341 INFO L87 Difference]: Start difference. First operand 3234 states and 5223 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-28 01:55:36,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:36,738 INFO L93 Difference]: Finished difference Result 4191 states and 6295 transitions. [2021-12-28 01:55:36,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 01:55:36,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 136 [2021-12-28 01:55:36,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:36,747 INFO L225 Difference]: With dead ends: 4191 [2021-12-28 01:55:36,747 INFO L226 Difference]: Without dead ends: 4189 [2021-12-28 01:55:36,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:55:36,749 INFO L933 BasicCegarLoop]: 4160 mSDtfsCounter, 4428 mSDsluCounter, 12146 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4451 SdHoareTripleChecker+Valid, 16306 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:36,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4451 Valid, 16306 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:55:36,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-12-28 01:55:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3610. [2021-12-28 01:55:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3610 states, 3346 states have (on average 1.5971309025702332) internal successors, (5344), 3361 states have internal predecessors, (5344), 144 states have call successors, (144), 103 states have call predecessors, (144), 118 states have return successors, (163), 146 states have call predecessors, (163), 144 states have call successors, (163) [2021-12-28 01:55:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 5651 transitions. [2021-12-28 01:55:36,876 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 5651 transitions. Word has length 136 [2021-12-28 01:55:36,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:36,876 INFO L470 AbstractCegarLoop]: Abstraction has 3610 states and 5651 transitions. [2021-12-28 01:55:36,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-28 01:55:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 5651 transitions. [2021-12-28 01:55:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-28 01:55:36,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:36,880 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:36,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:55:36,880 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:36,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:36,881 INFO L85 PathProgramCache]: Analyzing trace with hash -970573154, now seen corresponding path program 2 times [2021-12-28 01:55:36,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:36,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347114687] [2021-12-28 01:55:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:36,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:55:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:55:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:55:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:55:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:55:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:55:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:55:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:55:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 01:55:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-28 01:55:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:55:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-28 01:55:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-28 01:55:36,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:36,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347114687] [2021-12-28 01:55:36,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347114687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:36,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:55:36,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:55:36,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301348917] [2021-12-28 01:55:36,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:36,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:55:36,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:36,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:55:36,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:55:36,971 INFO L87 Difference]: Start difference. First operand 3610 states and 5651 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-28 01:55:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:37,442 INFO L93 Difference]: Finished difference Result 5333 states and 7624 transitions. [2021-12-28 01:55:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 01:55:37,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 175 [2021-12-28 01:55:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:37,448 INFO L225 Difference]: With dead ends: 5333 [2021-12-28 01:55:37,448 INFO L226 Difference]: Without dead ends: 2123 [2021-12-28 01:55:37,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:55:37,453 INFO L933 BasicCegarLoop]: 4120 mSDtfsCounter, 4539 mSDsluCounter, 12130 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4554 SdHoareTripleChecker+Valid, 16250 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:37,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4554 Valid, 16250 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:55:37,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-12-28 01:55:37,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2123. [2021-12-28 01:55:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 1.8656927426955703) internal successors, (3959), 2122 states have internal predecessors, (3959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:55:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3959 transitions. [2021-12-28 01:55:37,478 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3959 transitions. Word has length 175 [2021-12-28 01:55:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:37,478 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 3959 transitions. [2021-12-28 01:55:37,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-28 01:55:37,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3959 transitions. [2021-12-28 01:55:37,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1655 [2021-12-28 01:55:37,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:37,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:37,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:55:37,516 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:37,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:37,517 INFO L85 PathProgramCache]: Analyzing trace with hash 829492429, now seen corresponding path program 1 times [2021-12-28 01:55:37,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:37,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803960599] [2021-12-28 01:55:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:37,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:55:38,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:38,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803960599] [2021-12-28 01:55:38,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803960599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:38,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:55:38,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:55:38,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216240692] [2021-12-28 01:55:38,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:38,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:55:38,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:38,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:55:38,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:55:38,386 INFO L87 Difference]: Start difference. First operand 2123 states and 3959 transitions. Second operand has 3 states, 3 states have (on average 551.3333333333334) internal successors, (1654), 2 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:55:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:42,941 INFO L93 Difference]: Finished difference Result 6077 states and 11442 transitions. [2021-12-28 01:55:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:55:42,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 551.3333333333334) internal successors, (1654), 2 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1654 [2021-12-28 01:55:42,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:42,951 INFO L225 Difference]: With dead ends: 6077 [2021-12-28 01:55:42,951 INFO L226 Difference]: Without dead ends: 3957 [2021-12-28 01:55:42,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:55:42,956 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 517 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 5893 mSolverCounterSat, 1830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 7723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1830 IncrementalHoareTripleChecker+Valid, 5893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:42,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 826 Invalid, 7723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1830 Valid, 5893 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-28 01:55:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2021-12-28 01:55:42,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3894. [2021-12-28 01:55:43,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3894 states, 3893 states have (on average 1.8659131774980735) internal successors, (7264), 3893 states have internal predecessors, (7264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:55:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3894 states to 3894 states and 7264 transitions. [2021-12-28 01:55:43,008 INFO L78 Accepts]: Start accepts. Automaton has 3894 states and 7264 transitions. Word has length 1654 [2021-12-28 01:55:43,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:43,010 INFO L470 AbstractCegarLoop]: Abstraction has 3894 states and 7264 transitions. [2021-12-28 01:55:43,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 551.3333333333334) internal successors, (1654), 2 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:55:43,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3894 states and 7264 transitions. [2021-12-28 01:55:43,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1661 [2021-12-28 01:55:43,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:43,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:43,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 01:55:43,066 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:43,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:43,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2076117814, now seen corresponding path program 1 times [2021-12-28 01:55:43,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:43,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940776012] [2021-12-28 01:55:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:43,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:55:43,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:43,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940776012] [2021-12-28 01:55:43,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940776012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:43,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:55:43,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:55:43,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802114587] [2021-12-28 01:55:43,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:43,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:55:43,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:43,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:55:43,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:55:43,573 INFO L87 Difference]: Start difference. First operand 3894 states and 7264 transitions. Second operand has 3 states, 3 states have (on average 553.3333333333334) internal successors, (1660), 2 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:55:48,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:48,696 INFO L93 Difference]: Finished difference Result 9618 states and 17979 transitions. [2021-12-28 01:55:48,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:55:48,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 553.3333333333334) internal successors, (1660), 2 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1660 [2021-12-28 01:55:48,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:48,708 INFO L225 Difference]: With dead ends: 9618 [2021-12-28 01:55:48,709 INFO L226 Difference]: Without dead ends: 5727 [2021-12-28 01:55:48,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:55:48,715 INFO L933 BasicCegarLoop]: 1353 mSDtfsCounter, 1998 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 5245 mSolverCounterSat, 2286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1998 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 7531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2286 IncrementalHoareTripleChecker+Valid, 5245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:48,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1998 Valid, 1574 Invalid, 7531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2286 Valid, 5245 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-28 01:55:48,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5727 states. [2021-12-28 01:55:48,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5727 to 5644. [2021-12-28 01:55:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5644 states, 5643 states have (on average 1.6266170476696793) internal successors, (9179), 5643 states have internal predecessors, (9179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:55:48,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5644 states to 5644 states and 9179 transitions. [2021-12-28 01:55:48,784 INFO L78 Accepts]: Start accepts. Automaton has 5644 states and 9179 transitions. Word has length 1660 [2021-12-28 01:55:48,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:48,785 INFO L470 AbstractCegarLoop]: Abstraction has 5644 states and 9179 transitions. [2021-12-28 01:55:48,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 553.3333333333334) internal successors, (1660), 2 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:55:48,785 INFO L276 IsEmpty]: Start isEmpty. Operand 5644 states and 9179 transitions. [2021-12-28 01:55:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1662 [2021-12-28 01:55:48,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:48,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:48,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 01:55:48,808 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:48,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:48,808 INFO L85 PathProgramCache]: Analyzing trace with hash 999087907, now seen corresponding path program 1 times [2021-12-28 01:55:48,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:48,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133035075] [2021-12-28 01:55:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:48,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:55:49,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:49,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133035075] [2021-12-28 01:55:49,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133035075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:49,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:55:49,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:55:49,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756113752] [2021-12-28 01:55:49,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:49,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:55:49,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:49,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:55:49,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:55:49,786 INFO L87 Difference]: Start difference. First operand 5644 states and 9179 transitions. Second operand has 4 states, 4 states have (on average 415.25) internal successors, (1661), 3 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:55:57,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:55:57,630 INFO L93 Difference]: Finished difference Result 18023 states and 29367 transitions. [2021-12-28 01:55:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:55:57,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 415.25) internal successors, (1661), 3 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1661 [2021-12-28 01:55:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:55:57,649 INFO L225 Difference]: With dead ends: 18023 [2021-12-28 01:55:57,649 INFO L226 Difference]: Without dead ends: 10730 [2021-12-28 01:55:57,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:55:57,658 INFO L933 BasicCegarLoop]: 1044 mSDtfsCounter, 3047 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 9251 mSolverCounterSat, 3900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3047 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 13151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3900 IncrementalHoareTripleChecker+Valid, 9251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-12-28 01:55:57,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3047 Valid, 1315 Invalid, 13151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3900 Valid, 9251 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2021-12-28 01:55:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10730 states. [2021-12-28 01:55:57,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10730 to 10730. [2021-12-28 01:55:57,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10730 states, 10729 states have (on average 1.3039425855158915) internal successors, (13990), 10729 states have internal predecessors, (13990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:55:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10730 states to 10730 states and 13990 transitions. [2021-12-28 01:55:57,763 INFO L78 Accepts]: Start accepts. Automaton has 10730 states and 13990 transitions. Word has length 1661 [2021-12-28 01:55:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:55:57,763 INFO L470 AbstractCegarLoop]: Abstraction has 10730 states and 13990 transitions. [2021-12-28 01:55:57,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 415.25) internal successors, (1661), 3 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:55:57,764 INFO L276 IsEmpty]: Start isEmpty. Operand 10730 states and 13990 transitions. [2021-12-28 01:55:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1673 [2021-12-28 01:55:57,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:55:57,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:55:57,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 01:55:57,791 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:55:57,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:55:57,792 INFO L85 PathProgramCache]: Analyzing trace with hash 2010037851, now seen corresponding path program 1 times [2021-12-28 01:55:57,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:55:57,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739677683] [2021-12-28 01:55:57,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:55:57,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:55:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:55:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:55:58,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:55:58,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739677683] [2021-12-28 01:55:58,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739677683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:55:58,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:55:58,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:55:58,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460128352] [2021-12-28 01:55:58,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:55:58,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:55:58,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:55:58,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:55:58,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:55:58,385 INFO L87 Difference]: Start difference. First operand 10730 states and 13990 transitions. Second operand has 3 states, 3 states have (on average 557.3333333333334) internal successors, (1672), 3 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:56:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:56:02,393 INFO L93 Difference]: Finished difference Result 31696 states and 41305 transitions. [2021-12-28 01:56:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:56:02,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 557.3333333333334) internal successors, (1672), 3 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1672 [2021-12-28 01:56:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:56:02,427 INFO L225 Difference]: With dead ends: 31696 [2021-12-28 01:56:02,427 INFO L226 Difference]: Without dead ends: 20969 [2021-12-28 01:56:02,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:56:02,443 INFO L933 BasicCegarLoop]: 3093 mSDtfsCounter, 344 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 4531 mSolverCounterSat, 1137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 5668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1137 IncrementalHoareTripleChecker+Valid, 4531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-28 01:56:02,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 3332 Invalid, 5668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1137 Valid, 4531 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-28 01:56:02,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20969 states. [2021-12-28 01:56:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20969 to 20962. [2021-12-28 01:56:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20962 states, 20961 states have (on average 1.2017079337817853) internal successors, (25189), 20961 states have internal predecessors, (25189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:56:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20962 states to 20962 states and 25189 transitions. [2021-12-28 01:56:02,673 INFO L78 Accepts]: Start accepts. Automaton has 20962 states and 25189 transitions. Word has length 1672 [2021-12-28 01:56:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:56:02,674 INFO L470 AbstractCegarLoop]: Abstraction has 20962 states and 25189 transitions. [2021-12-28 01:56:02,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 557.3333333333334) internal successors, (1672), 3 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:56:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 20962 states and 25189 transitions. [2021-12-28 01:56:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1674 [2021-12-28 01:56:02,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:56:02,715 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:56:02,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 01:56:02,716 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:56:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:56:02,717 INFO L85 PathProgramCache]: Analyzing trace with hash -36266618, now seen corresponding path program 1 times [2021-12-28 01:56:02,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:56:02,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554059496] [2021-12-28 01:56:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:56:02,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:56:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:56:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 01:56:03,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:56:03,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554059496] [2021-12-28 01:56:03,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554059496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:56:03,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:56:03,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:56:03,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259190326] [2021-12-28 01:56:03,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:56:03,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:56:03,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:56:03,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:56:03,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:56:03,096 INFO L87 Difference]: Start difference. First operand 20962 states and 25189 transitions. Second operand has 3 states, 3 states have (on average 554.3333333333334) internal successors, (1663), 2 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:56:05,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:56:05,824 INFO L93 Difference]: Finished difference Result 62298 states and 74805 transitions. [2021-12-28 01:56:05,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:56:05,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 554.3333333333334) internal successors, (1663), 2 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1673 [2021-12-28 01:56:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:56:05,893 INFO L225 Difference]: With dead ends: 62298 [2021-12-28 01:56:05,893 INFO L226 Difference]: Without dead ends: 41339 [2021-12-28 01:56:06,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:56:06,029 INFO L933 BasicCegarLoop]: 1233 mSDtfsCounter, 2244 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 4644 mSolverCounterSat, 912 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2244 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 5556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 912 IncrementalHoareTripleChecker+Valid, 4644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-28 01:56:06,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2244 Valid, 1408 Invalid, 5556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [912 Valid, 4644 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-28 01:56:06,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41339 states. [2021-12-28 01:56:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41339 to 41337. [2021-12-28 01:56:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41337 states, 41336 states have (on average 1.1456357654344882) internal successors, (47356), 41336 states have internal predecessors, (47356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:56:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41337 states to 41337 states and 47356 transitions. [2021-12-28 01:56:06,414 INFO L78 Accepts]: Start accepts. Automaton has 41337 states and 47356 transitions. Word has length 1673 [2021-12-28 01:56:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:56:06,415 INFO L470 AbstractCegarLoop]: Abstraction has 41337 states and 47356 transitions. [2021-12-28 01:56:06,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 554.3333333333334) internal successors, (1663), 2 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:56:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 41337 states and 47356 transitions. [2021-12-28 01:56:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1736 [2021-12-28 01:56:06,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:56:06,467 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:56:06,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 01:56:06,468 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:56:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:56:06,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1157163599, now seen corresponding path program 1 times [2021-12-28 01:56:06,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:56:06,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300624939] [2021-12-28 01:56:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:56:06,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:56:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:56:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 01:56:06,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:56:06,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300624939] [2021-12-28 01:56:06,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300624939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:56:06,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:56:06,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:56:06,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002700974] [2021-12-28 01:56:06,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:56:06,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:56:06,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:56:06,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:56:06,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:56:06,872 INFO L87 Difference]: Start difference. First operand 41337 states and 47356 transitions. Second operand has 3 states, 3 states have (on average 575.0) internal successors, (1725), 2 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:56:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:56:10,085 INFO L93 Difference]: Finished difference Result 120030 states and 137668 transitions. [2021-12-28 01:56:10,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:56:10,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 575.0) internal successors, (1725), 2 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1735 [2021-12-28 01:56:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:56:10,182 INFO L225 Difference]: With dead ends: 120030 [2021-12-28 01:56:10,183 INFO L226 Difference]: Without dead ends: 78696 [2021-12-28 01:56:10,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:56:10,232 INFO L933 BasicCegarLoop]: 1282 mSDtfsCounter, 2233 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 4275 mSolverCounterSat, 1277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2233 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 5552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1277 IncrementalHoareTripleChecker+Valid, 4275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-28 01:56:10,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2233 Valid, 1415 Invalid, 5552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1277 Valid, 4275 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-28 01:56:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78696 states. [2021-12-28 01:56:11,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78696 to 75296. [2021-12-28 01:56:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75296 states, 75295 states have (on average 1.1140314761936383) internal successors, (83881), 75295 states have internal predecessors, (83881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:56:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75296 states to 75296 states and 83881 transitions. [2021-12-28 01:56:11,155 INFO L78 Accepts]: Start accepts. Automaton has 75296 states and 83881 transitions. Word has length 1735 [2021-12-28 01:56:11,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:56:11,156 INFO L470 AbstractCegarLoop]: Abstraction has 75296 states and 83881 transitions. [2021-12-28 01:56:11,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 575.0) internal successors, (1725), 2 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:56:11,156 INFO L276 IsEmpty]: Start isEmpty. Operand 75296 states and 83881 transitions. [2021-12-28 01:56:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1757 [2021-12-28 01:56:11,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:56:11,239 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:56:11,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 01:56:11,239 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:56:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:56:11,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1970493138, now seen corresponding path program 1 times [2021-12-28 01:56:11,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:56:11,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319435926] [2021-12-28 01:56:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:56:11,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:56:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:56:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-28 01:56:11,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:56:11,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319435926] [2021-12-28 01:56:11,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319435926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:56:11,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:56:11,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:56:11,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422436266] [2021-12-28 01:56:11,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:56:11,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:56:11,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:56:11,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:56:11,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:56:11,659 INFO L87 Difference]: Start difference. First operand 75296 states and 83881 transitions. Second operand has 3 states, 3 states have (on average 564.0) internal successors, (1692), 2 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:56:16,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:56:16,527 INFO L93 Difference]: Finished difference Result 216832 states and 241610 transitions. [2021-12-28 01:56:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:56:16,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 564.0) internal successors, (1692), 2 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1756 [2021-12-28 01:56:16,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:56:16,747 INFO L225 Difference]: With dead ends: 216832 [2021-12-28 01:56:16,748 INFO L226 Difference]: Without dead ends: 141539 [2021-12-28 01:56:16,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:56:16,792 INFO L933 BasicCegarLoop]: 993 mSDtfsCounter, 2090 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 4516 mSolverCounterSat, 1361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2090 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 5877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1361 IncrementalHoareTripleChecker+Valid, 4516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-28 01:56:16,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2090 Valid, 1126 Invalid, 5877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1361 Valid, 4516 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-28 01:56:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141539 states. [2021-12-28 01:56:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141539 to 136426.