./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label45.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/eca-rers2012/Problem13_label45.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 2e210509e505e706510a09c6375318a552974bcae2c812476edd01f44c4d9064 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 23:56:26,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 23:56:26,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 23:56:26,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 23:56:26,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 23:56:26,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 23:56:26,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 23:56:26,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 23:56:26,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 23:56:26,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 23:56:26,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 23:56:26,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 23:56:26,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 23:56:26,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 23:56:26,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 23:56:26,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 23:56:26,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 23:56:26,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 23:56:26,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 23:56:26,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 23:56:26,712 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 23:56:26,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 23:56:26,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 23:56:26,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 23:56:26,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 23:56:26,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 23:56:26,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 23:56:26,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 23:56:26,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 23:56:26,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 23:56:26,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 23:56:26,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 23:56:26,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 23:56:26,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 23:56:26,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 23:56:26,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 23:56:26,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 23:56:26,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 23:56:26,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 23:56:26,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 23:56:26,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 23:56:26,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 23:56:26,739 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 23:56:26,765 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 23:56:26,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 23:56:26,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 23:56:26,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 23:56:26,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 23:56:26,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 23:56:26,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 23:56:26,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 23:56:26,768 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 23:56:26,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 23:56:26,769 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 23:56:26,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 23:56:26,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 23:56:26,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 23:56:26,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 23:56:26,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 23:56:26,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 23:56:26,770 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 23:56:26,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 23:56:26,770 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 23:56:26,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 23:56:26,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 23:56:26,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 23:56:26,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 23:56:26,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:56:26,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 23:56:26,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 23:56:26,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 23:56:26,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 23:56:26,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 23:56:26,772 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 23:56:26,772 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 23:56:26,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 23:56:26,773 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e210509e505e706510a09c6375318a552974bcae2c812476edd01f44c4d9064 [2022-07-20 23:56:27,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 23:56:27,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 23:56:27,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 23:56:27,037 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 23:56:27,037 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 23:56:27,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label45.c [2022-07-20 23:56:27,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bcd8a472/ec77b9e16c494a03934f0b330813662a/FLAGc925a0d24 [2022-07-20 23:56:27,702 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 23:56:27,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label45.c [2022-07-20 23:56:27,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bcd8a472/ec77b9e16c494a03934f0b330813662a/FLAGc925a0d24 [2022-07-20 23:56:28,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bcd8a472/ec77b9e16c494a03934f0b330813662a [2022-07-20 23:56:28,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 23:56:28,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 23:56:28,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 23:56:28,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 23:56:28,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 23:56:28,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:56:28" (1/1) ... [2022-07-20 23:56:28,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693dc1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:56:28, skipping insertion in model container [2022-07-20 23:56:28,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:56:28" (1/1) ... [2022-07-20 23:56:28,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 23:56:28,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 23:56:28,317 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/eca-rers2012/Problem13_label45.c[1393,1406] [2022-07-20 23:56:29,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:56:29,018 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 23:56:29,031 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/eca-rers2012/Problem13_label45.c[1393,1406] [2022-07-20 23:56:29,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:56:29,411 INFO L208 MainTranslator]: Completed translation [2022-07-20 23:56:29,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:56:29 WrapperNode [2022-07-20 23:56:29,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 23:56:29,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 23:56:29,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 23:56:29,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 23:56:29,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:56:29" (1/1) ... [2022-07-20 23:56:29,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:56:29" (1/1) ... [2022-07-20 23:56:30,096 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-20 23:56:30,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 23:56:30,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 23:56:30,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 23:56:30,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 23:56:30,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:56:29" (1/1) ... [2022-07-20 23:56:30,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:56:29" (1/1) ... [2022-07-20 23:56:30,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:56:29" (1/1) ... [2022-07-20 23:56:30,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:56:29" (1/1) ... [2022-07-20 23:56:30,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:56:29" (1/1) ... [2022-07-20 23:56:30,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:56:29" (1/1) ... [2022-07-20 23:56:30,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:56:29" (1/1) ... [2022-07-20 23:56:30,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 23:56:30,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 23:56:30,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 23:56:30,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 23:56:30,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:56:29" (1/1) ... [2022-07-20 23:56:30,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:56:30,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:56:30,614 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) [2022-07-20 23:56:30,668 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 [2022-07-20 23:56:30,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 23:56:30,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 23:56:30,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 23:56:30,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 23:56:30,767 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 23:56:30,799 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 23:56:34,118 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 23:56:34,134 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 23:56:34,134 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 23:56:34,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:56:34 BoogieIcfgContainer [2022-07-20 23:56:34,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 23:56:34,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 23:56:34,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 23:56:34,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 23:56:34,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:56:28" (1/3) ... [2022-07-20 23:56:34,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4324f7de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:56:34, skipping insertion in model container [2022-07-20 23:56:34,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:56:29" (2/3) ... [2022-07-20 23:56:34,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4324f7de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:56:34, skipping insertion in model container [2022-07-20 23:56:34,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:56:34" (3/3) ... [2022-07-20 23:56:34,143 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label45.c [2022-07-20 23:56:34,153 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 23:56:34,153 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 23:56:34,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 23:56:34,214 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6b4ba84a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@a43c51c [2022-07-20 23:56:34,214 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 23:56:34,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) [2022-07-20 23:56:34,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 23:56:34,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:34,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:56:34,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:34,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1810726993, now seen corresponding path program 1 times [2022-07-20 23:56:34,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:34,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627690048] [2022-07-20 23:56:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:34,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:56:34,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:34,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627690048] [2022-07-20 23:56:34,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627690048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:34,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:34,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:56:34,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489110005] [2022-07-20 23:56:34,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:34,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:34,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:34,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:34,356 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-20 23:56:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:37,674 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2022-07-20 23:56:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:37,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-07-20 23:56:37,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:37,694 INFO L225 Difference]: With dead ends: 3121 [2022-07-20 23:56:37,695 INFO L226 Difference]: Without dead ends: 1944 [2022-07-20 23:56:37,701 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:37,703 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 982 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:37,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [982 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-20 23:56:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-07-20 23:56:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2022-07-20 23:56:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 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) [2022-07-20 23:56:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2022-07-20 23:56:37,779 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 7 [2022-07-20 23:56:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:37,780 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2022-07-20 23:56:37,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-20 23:56:37,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2022-07-20 23:56:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-20 23:56:37,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:37,782 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-20 23:56:37,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 23:56:37,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:37,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:37,783 INFO L85 PathProgramCache]: Analyzing trace with hash -887325142, now seen corresponding path program 1 times [2022-07-20 23:56:37,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:37,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053036891] [2022-07-20 23:56:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:37,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:56:37,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:37,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053036891] [2022-07-20 23:56:37,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053036891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:37,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:37,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:56:37,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100123355] [2022-07-20 23:56:37,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:37,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:37,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:37,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:37,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:37,986 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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) [2022-07-20 23:56:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:40,951 INFO L93 Difference]: Finished difference Result 5351 states and 9369 transitions. [2022-07-20 23:56:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:40,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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 72 [2022-07-20 23:56:40,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:40,962 INFO L225 Difference]: With dead ends: 5351 [2022-07-20 23:56:40,962 INFO L226 Difference]: Without dead ends: 3480 [2022-07-20 23:56:40,969 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:40,970 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 884 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:40,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1079 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-20 23:56:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2022-07-20 23:56:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3479. [2022-07-20 23:56:41,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 1.518688901667625) internal successors, (5282), 3478 states have internal predecessors, (5282), 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) [2022-07-20 23:56:41,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5282 transitions. [2022-07-20 23:56:41,019 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5282 transitions. Word has length 72 [2022-07-20 23:56:41,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:41,020 INFO L495 AbstractCegarLoop]: Abstraction has 3479 states and 5282 transitions. [2022-07-20 23:56:41,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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) [2022-07-20 23:56:41,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5282 transitions. [2022-07-20 23:56:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-20 23:56:41,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:41,024 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-20 23:56:41,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 23:56:41,026 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash -631194865, now seen corresponding path program 1 times [2022-07-20 23:56:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:41,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106489480] [2022-07-20 23:56:41,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:41,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:56:41,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:41,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106489480] [2022-07-20 23:56:41,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106489480] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:41,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:41,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:56:41,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715413550] [2022-07-20 23:56:41,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:41,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:41,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:41,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:41,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:41,145 INFO L87 Difference]: Start difference. First operand 3479 states and 5282 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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) [2022-07-20 23:56:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:44,144 INFO L93 Difference]: Finished difference Result 10144 states and 15439 transitions. [2022-07-20 23:56:44,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:44,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 74 [2022-07-20 23:56:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:44,202 INFO L225 Difference]: With dead ends: 10144 [2022-07-20 23:56:44,202 INFO L226 Difference]: Without dead ends: 6667 [2022-07-20 23:56:44,216 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:44,237 INFO L413 NwaCegarLoop]: 745 mSDtfsCounter, 977 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:44,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 879 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-20 23:56:44,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2022-07-20 23:56:44,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6657. [2022-07-20 23:56:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 6656 states have (on average 1.3728966346153846) internal successors, (9138), 6656 states have internal predecessors, (9138), 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) [2022-07-20 23:56:44,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 9138 transitions. [2022-07-20 23:56:44,474 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 9138 transitions. Word has length 74 [2022-07-20 23:56:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:44,476 INFO L495 AbstractCegarLoop]: Abstraction has 6657 states and 9138 transitions. [2022-07-20 23:56:44,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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) [2022-07-20 23:56:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 9138 transitions. [2022-07-20 23:56:44,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-20 23:56:44,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:44,481 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-20 23:56:44,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 23:56:44,482 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:44,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:44,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1387066238, now seen corresponding path program 1 times [2022-07-20 23:56:44,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:44,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080204918] [2022-07-20 23:56:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:44,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:56:44,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:44,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080204918] [2022-07-20 23:56:44,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080204918] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:44,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:44,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:56:44,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602755405] [2022-07-20 23:56:44,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:44,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:44,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:44,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:44,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:44,573 INFO L87 Difference]: Start difference. First operand 6657 states and 9138 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2022-07-20 23:56:47,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:47,464 INFO L93 Difference]: Finished difference Result 19637 states and 26969 transitions. [2022-07-20 23:56:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:47,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 80 [2022-07-20 23:56:47,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:47,496 INFO L225 Difference]: With dead ends: 19637 [2022-07-20 23:56:47,496 INFO L226 Difference]: Without dead ends: 12982 [2022-07-20 23:56:47,503 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:47,509 INFO L413 NwaCegarLoop]: 1012 mSDtfsCounter, 791 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:47,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1163 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 23:56:47,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12982 states. [2022-07-20 23:56:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12175. [2022-07-20 23:56:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12175 states, 12174 states have (on average 1.2529160505996386) internal successors, (15253), 12174 states have internal predecessors, (15253), 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) [2022-07-20 23:56:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12175 states to 12175 states and 15253 transitions. [2022-07-20 23:56:47,653 INFO L78 Accepts]: Start accepts. Automaton has 12175 states and 15253 transitions. Word has length 80 [2022-07-20 23:56:47,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:47,654 INFO L495 AbstractCegarLoop]: Abstraction has 12175 states and 15253 transitions. [2022-07-20 23:56:47,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2022-07-20 23:56:47,655 INFO L276 IsEmpty]: Start isEmpty. Operand 12175 states and 15253 transitions. [2022-07-20 23:56:47,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-20 23:56:47,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:47,657 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-20 23:56:47,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 23:56:47,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:47,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:47,658 INFO L85 PathProgramCache]: Analyzing trace with hash -920876442, now seen corresponding path program 1 times [2022-07-20 23:56:47,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:47,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993223063] [2022-07-20 23:56:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:47,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:56:47,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:47,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993223063] [2022-07-20 23:56:47,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993223063] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:56:47,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511877282] [2022-07-20 23:56:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:47,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:56:47,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:56:47,775 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) [2022-07-20 23:56:47,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 23:56:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:47,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:56:47,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:56:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 23:56:48,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:56:48,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511877282] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:48,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:56:48,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-20 23:56:48,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380575763] [2022-07-20 23:56:48,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:48,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:48,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:48,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:48,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 23:56:48,011 INFO L87 Difference]: Start difference. First operand 12175 states and 15253 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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) [2022-07-20 23:56:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:50,975 INFO L93 Difference]: Finished difference Result 36312 states and 45491 transitions. [2022-07-20 23:56:50,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:50,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 96 [2022-07-20 23:56:50,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:51,030 INFO L225 Difference]: With dead ends: 36312 [2022-07-20 23:56:51,030 INFO L226 Difference]: Without dead ends: 24139 [2022-07-20 23:56:51,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 23:56:51,046 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 1053 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:51,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1053 Valid, 922 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2631 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 23:56:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24139 states. [2022-07-20 23:56:51,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24139 to 24121. [2022-07-20 23:56:51,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24121 states, 24120 states have (on average 1.2004145936981758) internal successors, (28954), 24120 states have internal predecessors, (28954), 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) [2022-07-20 23:56:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24121 states to 24121 states and 28954 transitions. [2022-07-20 23:56:51,557 INFO L78 Accepts]: Start accepts. Automaton has 24121 states and 28954 transitions. Word has length 96 [2022-07-20 23:56:51,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:51,563 INFO L495 AbstractCegarLoop]: Abstraction has 24121 states and 28954 transitions. [2022-07-20 23:56:51,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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) [2022-07-20 23:56:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 24121 states and 28954 transitions. [2022-07-20 23:56:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-20 23:56:51,569 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:51,569 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-20 23:56:51,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 23:56:51,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:56:51,784 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:51,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1730478932, now seen corresponding path program 1 times [2022-07-20 23:56:51,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:51,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771811324] [2022-07-20 23:56:51,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:51,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 23:56:51,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:51,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771811324] [2022-07-20 23:56:51,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771811324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:51,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:51,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:56:51,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117664331] [2022-07-20 23:56:51,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:51,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:51,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:51,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:51,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:51,869 INFO L87 Difference]: Start difference. First operand 24121 states and 28954 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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) [2022-07-20 23:56:54,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:54,085 INFO L93 Difference]: Finished difference Result 49027 states and 58708 transitions. [2022-07-20 23:56:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:54,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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 199 [2022-07-20 23:56:54,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:54,138 INFO L225 Difference]: With dead ends: 49027 [2022-07-20 23:56:54,139 INFO L226 Difference]: Without dead ends: 24908 [2022-07-20 23:56:54,160 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:54,160 INFO L413 NwaCegarLoop]: 1083 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:54,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 1212 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 23:56:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24908 states. [2022-07-20 23:56:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24908 to 24908. [2022-07-20 23:56:54,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24908 states, 24907 states have (on average 1.1942827317621552) internal successors, (29746), 24907 states have internal predecessors, (29746), 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) [2022-07-20 23:56:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24908 states to 24908 states and 29746 transitions. [2022-07-20 23:56:54,567 INFO L78 Accepts]: Start accepts. Automaton has 24908 states and 29746 transitions. Word has length 199 [2022-07-20 23:56:54,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:54,568 INFO L495 AbstractCegarLoop]: Abstraction has 24908 states and 29746 transitions. [2022-07-20 23:56:54,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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) [2022-07-20 23:56:54,568 INFO L276 IsEmpty]: Start isEmpty. Operand 24908 states and 29746 transitions. [2022-07-20 23:56:54,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-20 23:56:54,569 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:54,570 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-20 23:56:54,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 23:56:54,570 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:54,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:54,571 INFO L85 PathProgramCache]: Analyzing trace with hash -326571061, now seen corresponding path program 1 times [2022-07-20 23:56:54,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:54,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971511664] [2022-07-20 23:56:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:54,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:56:54,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971511664] [2022-07-20 23:56:54,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971511664] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:54,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:54,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:54,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633798391] [2022-07-20 23:56:54,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:54,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:54,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:54,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:54,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:54,660 INFO L87 Difference]: Start difference. First operand 24908 states and 29746 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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) [2022-07-20 23:56:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:57,815 INFO L93 Difference]: Finished difference Result 61634 states and 75007 transitions. [2022-07-20 23:56:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:57,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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 206 [2022-07-20 23:56:57,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:57,870 INFO L225 Difference]: With dead ends: 61634 [2022-07-20 23:56:57,870 INFO L226 Difference]: Without dead ends: 37515 [2022-07-20 23:56:57,892 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:57,892 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 861 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:57,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 945 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 23:56:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37515 states. [2022-07-20 23:56:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37515 to 35930. [2022-07-20 23:56:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35930 states, 35929 states have (on average 1.1823874864315733) internal successors, (42482), 35929 states have internal predecessors, (42482), 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) [2022-07-20 23:56:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35930 states to 35930 states and 42482 transitions. [2022-07-20 23:56:58,344 INFO L78 Accepts]: Start accepts. Automaton has 35930 states and 42482 transitions. Word has length 206 [2022-07-20 23:56:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:58,346 INFO L495 AbstractCegarLoop]: Abstraction has 35930 states and 42482 transitions. [2022-07-20 23:56:58,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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) [2022-07-20 23:56:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 35930 states and 42482 transitions. [2022-07-20 23:56:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-20 23:56:58,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:58,348 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-20 23:56:58,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 23:56:58,348 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:58,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:58,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1890222288, now seen corresponding path program 1 times [2022-07-20 23:56:58,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:58,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154630063] [2022-07-20 23:56:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:58,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:56:58,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:58,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154630063] [2022-07-20 23:56:58,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154630063] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:58,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:58,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:58,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570569649] [2022-07-20 23:56:58,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:58,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:58,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:58,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:58,434 INFO L87 Difference]: Start difference. First operand 35930 states and 42482 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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) [2022-07-20 23:57:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:57:01,160 INFO L93 Difference]: Finished difference Result 70920 states and 83963 transitions. [2022-07-20 23:57:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:57:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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 221 [2022-07-20 23:57:01,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:57:01,201 INFO L225 Difference]: With dead ends: 70920 [2022-07-20 23:57:01,201 INFO L226 Difference]: Without dead ends: 35779 [2022-07-20 23:57:01,224 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:57:01,225 INFO L413 NwaCegarLoop]: 1504 mSDtfsCounter, 1036 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:57:01,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 1641 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:57:01,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35779 states. [2022-07-20 23:57:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35779 to 34200. [2022-07-20 23:57:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34200 states, 34199 states have (on average 1.1296821544489606) internal successors, (38634), 34199 states have internal predecessors, (38634), 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) [2022-07-20 23:57:01,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34200 states to 34200 states and 38634 transitions. [2022-07-20 23:57:01,787 INFO L78 Accepts]: Start accepts. Automaton has 34200 states and 38634 transitions. Word has length 221 [2022-07-20 23:57:01,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:57:01,788 INFO L495 AbstractCegarLoop]: Abstraction has 34200 states and 38634 transitions. [2022-07-20 23:57:01,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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) [2022-07-20 23:57:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand 34200 states and 38634 transitions. [2022-07-20 23:57:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-07-20 23:57:01,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:57:01,794 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 23:57:01,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 23:57:01,794 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:57:01,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:57:01,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1768382239, now seen corresponding path program 1 times [2022-07-20 23:57:01,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:57:01,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567936876] [2022-07-20 23:57:01,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:01,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:57:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 23:57:01,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:57:01,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567936876] [2022-07-20 23:57:01,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567936876] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:57:01,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:57:01,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:57:01,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400405048] [2022-07-20 23:57:01,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:57:01,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:57:01,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:57:01,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:57:01,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:57:01,893 INFO L87 Difference]: Start difference. First operand 34200 states and 38634 transitions. Second operand has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 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) [2022-07-20 23:57:07,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:57:07,916 INFO L93 Difference]: Finished difference Result 100862 states and 114153 transitions. [2022-07-20 23:57:07,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:57:07,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 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 290 [2022-07-20 23:57:07,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:57:07,994 INFO L225 Difference]: With dead ends: 100862 [2022-07-20 23:57:07,994 INFO L226 Difference]: Without dead ends: 67451 [2022-07-20 23:57:08,017 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:57:08,017 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 1718 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 5996 mSolverCounterSat, 1104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 7100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1104 IncrementalHoareTripleChecker+Valid, 5996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:57:08,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 756 Invalid, 7100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1104 Valid, 5996 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-07-20 23:57:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67451 states. [2022-07-20 23:57:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67451 to 65761. [2022-07-20 23:57:08,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65761 states, 65760 states have (on average 1.1186587591240875) internal successors, (73563), 65760 states have internal predecessors, (73563), 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) [2022-07-20 23:57:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65761 states to 65761 states and 73563 transitions. [2022-07-20 23:57:08,681 INFO L78 Accepts]: Start accepts. Automaton has 65761 states and 73563 transitions. Word has length 290 [2022-07-20 23:57:08,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:57:08,681 INFO L495 AbstractCegarLoop]: Abstraction has 65761 states and 73563 transitions. [2022-07-20 23:57:08,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 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) [2022-07-20 23:57:08,682 INFO L276 IsEmpty]: Start isEmpty. Operand 65761 states and 73563 transitions. [2022-07-20 23:57:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-07-20 23:57:08,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:57:08,685 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 23:57:08,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 23:57:08,686 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:57:08,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:57:08,686 INFO L85 PathProgramCache]: Analyzing trace with hash -293262909, now seen corresponding path program 1 times [2022-07-20 23:57:08,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:57:08,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362872859] [2022-07-20 23:57:08,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:08,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:57:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 23:57:08,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:57:08,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362872859] [2022-07-20 23:57:08,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362872859] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:57:08,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:57:08,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:57:08,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916094599] [2022-07-20 23:57:08,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:57:08,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:57:08,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:57:08,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:57:08,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:57:08,788 INFO L87 Difference]: Start difference. First operand 65761 states and 73563 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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) [2022-07-20 23:57:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:57:11,713 INFO L93 Difference]: Finished difference Result 144134 states and 160907 transitions. [2022-07-20 23:57:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:57:11,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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 304 [2022-07-20 23:57:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:57:11,826 INFO L225 Difference]: With dead ends: 144134 [2022-07-20 23:57:11,826 INFO L226 Difference]: Without dead ends: 79162 [2022-07-20 23:57:11,860 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:57:11,861 INFO L413 NwaCegarLoop]: 1001 mSDtfsCounter, 728 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:57:11,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1177 Invalid, 2869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:57:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79162 states. [2022-07-20 23:57:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79162 to 78365. [2022-07-20 23:57:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78365 states, 78364 states have (on average 1.106732683375019) internal successors, (86728), 78364 states have internal predecessors, (86728), 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) [2022-07-20 23:57:12,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78365 states to 78365 states and 86728 transitions. [2022-07-20 23:57:12,981 INFO L78 Accepts]: Start accepts. Automaton has 78365 states and 86728 transitions. Word has length 304 [2022-07-20 23:57:12,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:57:12,981 INFO L495 AbstractCegarLoop]: Abstraction has 78365 states and 86728 transitions. [2022-07-20 23:57:12,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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) [2022-07-20 23:57:12,982 INFO L276 IsEmpty]: Start isEmpty. Operand 78365 states and 86728 transitions. [2022-07-20 23:57:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-07-20 23:57:13,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:57:13,002 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:57:13,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 23:57:13,002 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:57:13,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:57:13,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2041023051, now seen corresponding path program 1 times [2022-07-20 23:57:13,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:57:13,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608199684] [2022-07-20 23:57:13,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:13,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:57:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 178 proven. 113 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 23:57:13,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:57:13,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608199684] [2022-07-20 23:57:13,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608199684] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:57:13,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693452172] [2022-07-20 23:57:13,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:13,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:57:13,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:57:13,583 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) [2022-07-20 23:57:13,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 23:57:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:13,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:57:13,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:57:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-20 23:57:13,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:57:13,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693452172] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:57:13,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:57:13,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-20 23:57:13,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827725284] [2022-07-20 23:57:13,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:57:13,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:57:13,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:57:13,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:57:13,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:57:13,847 INFO L87 Difference]: Start difference. First operand 78365 states and 86728 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2022-07-20 23:57:16,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:57:16,859 INFO L93 Difference]: Finished difference Result 155939 states and 172661 transitions. [2022-07-20 23:57:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:57:16,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 333 [2022-07-20 23:57:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:57:16,957 INFO L225 Difference]: With dead ends: 155939 [2022-07-20 23:57:16,957 INFO L226 Difference]: Without dead ends: 78363 [2022-07-20 23:57:16,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:57:16,988 INFO L413 NwaCegarLoop]: 1343 mSDtfsCounter, 1113 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:57:16,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 1422 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 23:57:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78363 states. [2022-07-20 23:57:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78363 to 78362. [2022-07-20 23:57:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78362 states, 78361 states have (on average 1.0850167813070277) internal successors, (85023), 78361 states have internal predecessors, (85023), 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) [2022-07-20 23:57:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78362 states to 78362 states and 85023 transitions. [2022-07-20 23:57:17,954 INFO L78 Accepts]: Start accepts. Automaton has 78362 states and 85023 transitions. Word has length 333 [2022-07-20 23:57:17,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:57:17,954 INFO L495 AbstractCegarLoop]: Abstraction has 78362 states and 85023 transitions. [2022-07-20 23:57:17,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2022-07-20 23:57:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 78362 states and 85023 transitions. [2022-07-20 23:57:17,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-07-20 23:57:17,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:57:17,978 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 23:57:18,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 23:57:18,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-20 23:57:18,178 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:57:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:57:18,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1359381949, now seen corresponding path program 1 times [2022-07-20 23:57:18,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:57:18,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502448466] [2022-07-20 23:57:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:18,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:57:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 226 proven. 5 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-20 23:57:18,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:57:18,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502448466] [2022-07-20 23:57:18,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502448466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:57:18,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689477452] [2022-07-20 23:57:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:18,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:57:18,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:57:18,368 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) [2022-07-20 23:57:18,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 23:57:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:18,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 23:57:18,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:57:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-20 23:57:19,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:57:19,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689477452] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:57:19,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:57:19,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-20 23:57:19,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740002133] [2022-07-20 23:57:19,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:57:19,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:57:19,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:57:19,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:57:19,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 23:57:19,017 INFO L87 Difference]: Start difference. First operand 78362 states and 85023 transitions. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 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) [2022-07-20 23:57:25,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:57:25,418 INFO L93 Difference]: Finished difference Result 188382 states and 204603 transitions. [2022-07-20 23:57:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:57:25,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 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 336 [2022-07-20 23:57:25,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:57:25,543 INFO L225 Difference]: With dead ends: 188382 [2022-07-20 23:57:25,544 INFO L226 Difference]: Without dead ends: 110809 [2022-07-20 23:57:25,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 23:57:25,580 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 1697 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 5786 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1697 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 6640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 5786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-07-20 23:57:25,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1697 Valid, 637 Invalid, 6640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 5786 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-07-20 23:57:25,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110809 states. [2022-07-20 23:57:26,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110809 to 109125. [2022-07-20 23:57:26,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109125 states, 109124 states have (on average 1.0852791319966277) internal successors, (118430), 109124 states have internal predecessors, (118430), 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) [2022-07-20 23:57:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109125 states to 109125 states and 118430 transitions. [2022-07-20 23:57:26,874 INFO L78 Accepts]: Start accepts. Automaton has 109125 states and 118430 transitions. Word has length 336 [2022-07-20 23:57:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:57:26,874 INFO L495 AbstractCegarLoop]: Abstraction has 109125 states and 118430 transitions. [2022-07-20 23:57:26,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 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) [2022-07-20 23:57:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 109125 states and 118430 transitions. [2022-07-20 23:57:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-07-20 23:57:26,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:57:26,877 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-07-20 23:57:26,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 23:57:27,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:57:27,094 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:57:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:57:27,095 INFO L85 PathProgramCache]: Analyzing trace with hash 448404453, now seen corresponding path program 1 times [2022-07-20 23:57:27,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:57:27,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469408072] [2022-07-20 23:57:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:27,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:57:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-20 23:57:27,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:57:27,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469408072] [2022-07-20 23:57:27,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469408072] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:57:27,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:57:27,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:57:27,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88347579] [2022-07-20 23:57:27,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:57:27,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:57:27,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:57:27,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:57:27,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:57:27,458 INFO L87 Difference]: Start difference. First operand 109125 states and 118430 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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) [2022-07-20 23:57:30,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:57:30,951 INFO L93 Difference]: Finished difference Result 252884 states and 276258 transitions. [2022-07-20 23:57:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:57:30,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 369 [2022-07-20 23:57:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:57:31,140 INFO L225 Difference]: With dead ends: 252884 [2022-07-20 23:57:31,141 INFO L226 Difference]: Without dead ends: 144548 [2022-07-20 23:57:31,175 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:57:31,178 INFO L413 NwaCegarLoop]: 1757 mSDtfsCounter, 787 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 730 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 730 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:57:31,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 1896 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [730 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-20 23:57:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144548 states. [2022-07-20 23:57:32,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144548 to 136663. [2022-07-20 23:57:32,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136663 states, 136662 states have (on average 1.0765611508685662) internal successors, (147125), 136662 states have internal predecessors, (147125), 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) [2022-07-20 23:57:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136663 states to 136663 states and 147125 transitions. [2022-07-20 23:57:32,806 INFO L78 Accepts]: Start accepts. Automaton has 136663 states and 147125 transitions. Word has length 369 [2022-07-20 23:57:32,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:57:32,807 INFO L495 AbstractCegarLoop]: Abstraction has 136663 states and 147125 transitions. [2022-07-20 23:57:32,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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) [2022-07-20 23:57:32,807 INFO L276 IsEmpty]: Start isEmpty. Operand 136663 states and 147125 transitions. [2022-07-20 23:57:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-07-20 23:57:32,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:57:32,811 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:57:32,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 23:57:32,811 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:57:32,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:57:32,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1658991805, now seen corresponding path program 1 times [2022-07-20 23:57:32,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:57:32,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033567073] [2022-07-20 23:57:32,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:32,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:57:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-20 23:57:33,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:57:33,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033567073] [2022-07-20 23:57:33,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033567073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:57:33,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:57:33,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:57:33,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280246949] [2022-07-20 23:57:33,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:57:33,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:57:33,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:57:33,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:57:33,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:57:33,239 INFO L87 Difference]: Start difference. First operand 136663 states and 147125 transitions. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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) [2022-07-20 23:57:36,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:57:36,574 INFO L93 Difference]: Finished difference Result 276476 states and 297426 transitions. [2022-07-20 23:57:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:57:36,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 411 [2022-07-20 23:57:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:57:36,766 INFO L225 Difference]: With dead ends: 276476 [2022-07-20 23:57:36,766 INFO L226 Difference]: Without dead ends: 140602 [2022-07-20 23:57:36,845 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:57:36,845 INFO L413 NwaCegarLoop]: 1380 mSDtfsCounter, 1031 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:57:36,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 1466 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 23:57:37,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140602 states. [2022-07-20 23:57:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140602 to 136651. [2022-07-20 23:57:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136651 states, 136650 states have (on average 1.0645810464690817) internal successors, (145475), 136650 states have internal predecessors, (145475), 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) [2022-07-20 23:57:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136651 states to 136651 states and 145475 transitions. [2022-07-20 23:57:38,646 INFO L78 Accepts]: Start accepts. Automaton has 136651 states and 145475 transitions. Word has length 411 [2022-07-20 23:57:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:57:38,659 INFO L495 AbstractCegarLoop]: Abstraction has 136651 states and 145475 transitions. [2022-07-20 23:57:38,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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) [2022-07-20 23:57:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand 136651 states and 145475 transitions. [2022-07-20 23:57:38,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-07-20 23:57:38,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:57:38,681 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 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] [2022-07-20 23:57:38,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 23:57:38,682 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:57:38,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:57:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1835753279, now seen corresponding path program 1 times [2022-07-20 23:57:38,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:57:38,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940475599] [2022-07-20 23:57:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:38,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:57:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 450 proven. 113 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-07-20 23:57:38,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:57:38,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940475599] [2022-07-20 23:57:38,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940475599] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:57:38,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167949327] [2022-07-20 23:57:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:38,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:57:38,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:57:38,964 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) [2022-07-20 23:57:38,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 23:57:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:39,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:57:39,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:57:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 494 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 23:57:39,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:57:39,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167949327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:57:39,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:57:39,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-20 23:57:39,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019946674] [2022-07-20 23:57:39,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:57:39,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:57:39,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:57:39,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:57:39,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:57:39,170 INFO L87 Difference]: Start difference. First operand 136651 states and 145475 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2022-07-20 23:57:42,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:57:42,357 INFO L93 Difference]: Finished difference Result 274873 states and 292534 transitions. [2022-07-20 23:57:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:57:42,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 470 [2022-07-20 23:57:42,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:57:42,557 INFO L225 Difference]: With dead ends: 274873 [2022-07-20 23:57:42,557 INFO L226 Difference]: Without dead ends: 139011 [2022-07-20 23:57:42,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:57:42,630 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 1034 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:57:42,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 529 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [669 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 23:57:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139011 states. [2022-07-20 23:57:44,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139011 to 136636. [2022-07-20 23:57:44,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136636 states, 136635 states have (on average 1.0588209463168294) internal successors, (144672), 136635 states have internal predecessors, (144672), 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) [2022-07-20 23:57:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136636 states to 136636 states and 144672 transitions. [2022-07-20 23:57:44,277 INFO L78 Accepts]: Start accepts. Automaton has 136636 states and 144672 transitions. Word has length 470 [2022-07-20 23:57:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:57:44,278 INFO L495 AbstractCegarLoop]: Abstraction has 136636 states and 144672 transitions. [2022-07-20 23:57:44,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2022-07-20 23:57:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 136636 states and 144672 transitions. [2022-07-20 23:57:44,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-07-20 23:57:44,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:57:44,285 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:57:44,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-20 23:57:44,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-20 23:57:44,499 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:57:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:57:44,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2110920467, now seen corresponding path program 1 times [2022-07-20 23:57:44,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:57:44,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228926804] [2022-07-20 23:57:44,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:44,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:57:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 484 proven. 113 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-07-20 23:57:44,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:57:44,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228926804] [2022-07-20 23:57:44,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228926804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:57:44,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031443107] [2022-07-20 23:57:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:44,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:57:44,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:57:44,715 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) [2022-07-20 23:57:44,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 23:57:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:44,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:57:44,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:57:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 550 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 23:57:45,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:57:45,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031443107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:57:45,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:57:45,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-20 23:57:45,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69924141] [2022-07-20 23:57:45,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:57:45,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:57:45,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:57:45,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:57:45,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:57:45,350 INFO L87 Difference]: Start difference. First operand 136636 states and 144672 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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) [2022-07-20 23:57:48,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:57:48,555 INFO L93 Difference]: Finished difference Result 302403 states and 320777 transitions. [2022-07-20 23:57:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:57:48,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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 487 [2022-07-20 23:57:48,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:57:48,739 INFO L225 Difference]: With dead ends: 302403 [2022-07-20 23:57:48,739 INFO L226 Difference]: Without dead ends: 166556 [2022-07-20 23:57:48,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:57:48,785 INFO L413 NwaCegarLoop]: 1596 mSDtfsCounter, 856 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:57:48,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 1717 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 23:57:48,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166556 states. [2022-07-20 23:57:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166556 to 163392. [2022-07-20 23:57:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163392 states, 163391 states have (on average 1.0560618393913985) internal successors, (172551), 163391 states have internal predecessors, (172551), 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) [2022-07-20 23:57:50,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163392 states to 163392 states and 172551 transitions. [2022-07-20 23:57:50,624 INFO L78 Accepts]: Start accepts. Automaton has 163392 states and 172551 transitions. Word has length 487 [2022-07-20 23:57:50,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:57:50,624 INFO L495 AbstractCegarLoop]: Abstraction has 163392 states and 172551 transitions. [2022-07-20 23:57:50,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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) [2022-07-20 23:57:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 163392 states and 172551 transitions. [2022-07-20 23:57:50,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-07-20 23:57:50,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:57:50,632 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:57:50,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 23:57:50,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-20 23:57:50,849 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:57:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:57:50,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1524835936, now seen corresponding path program 1 times [2022-07-20 23:57:50,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:57:50,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828918193] [2022-07-20 23:57:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:50,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:57:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 247 proven. 113 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 23:57:51,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:57:51,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828918193] [2022-07-20 23:57:51,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828918193] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:57:51,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864140026] [2022-07-20 23:57:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:51,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:57:51,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:57:51,784 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) [2022-07-20 23:57:51,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 23:57:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:52,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 23:57:52,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:57:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-20 23:57:52,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:57:52,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864140026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:57:52,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:57:52,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-20 23:57:52,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599043551] [2022-07-20 23:57:52,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:57:52,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:57:52,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:57:52,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:57:52,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:57:52,619 INFO L87 Difference]: Start difference. First operand 163392 states and 172551 transitions. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 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) [2022-07-20 23:57:55,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:57:55,771 INFO L93 Difference]: Finished difference Result 312623 states and 330739 transitions. [2022-07-20 23:57:55,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:57:55,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 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 498 [2022-07-20 23:57:55,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:57:55,947 INFO L225 Difference]: With dead ends: 312623 [2022-07-20 23:57:55,947 INFO L226 Difference]: Without dead ends: 166552 [2022-07-20 23:57:56,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:57:56,002 INFO L413 NwaCegarLoop]: 998 mSDtfsCounter, 682 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 2547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:57:56,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 1132 Invalid, 2547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 23:57:56,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166552 states. [2022-07-20 23:57:57,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166552 to 166542. [2022-07-20 23:57:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166542 states, 166541 states have (on average 1.0514708089899785) internal successors, (175113), 166541 states have internal predecessors, (175113), 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) [2022-07-20 23:57:57,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166542 states to 166542 states and 175113 transitions. [2022-07-20 23:57:57,962 INFO L78 Accepts]: Start accepts. Automaton has 166542 states and 175113 transitions. Word has length 498 [2022-07-20 23:57:57,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:57:57,963 INFO L495 AbstractCegarLoop]: Abstraction has 166542 states and 175113 transitions. [2022-07-20 23:57:57,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 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) [2022-07-20 23:57:57,963 INFO L276 IsEmpty]: Start isEmpty. Operand 166542 states and 175113 transitions. [2022-07-20 23:57:57,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2022-07-20 23:57:57,969 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:57:57,969 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:57:57,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-20 23:57:58,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-20 23:57:58,184 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:57:58,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:57:58,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1468928245, now seen corresponding path program 1 times [2022-07-20 23:57:58,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:57:58,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984662045] [2022-07-20 23:57:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:58,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:57:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 226 proven. 5 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-20 23:57:58,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:57:58,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984662045] [2022-07-20 23:57:58,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984662045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:57:58,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819638515] [2022-07-20 23:57:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:58,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:57:58,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:57:58,416 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) [2022-07-20 23:57:58,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 23:57:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:58,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 23:57:58,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:57:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 295 proven. 10 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-20 23:57:59,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 23:58:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 295 proven. 10 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-20 23:58:00,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819638515] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 23:58:00,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 23:58:00,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-20 23:58:00,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198835550] [2022-07-20 23:58:00,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 23:58:00,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 23:58:00,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:58:00,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 23:58:00,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-20 23:58:00,180 INFO L87 Difference]: Start difference. First operand 166542 states and 175113 transitions. Second operand has 8 states, 8 states have (on average 77.625) internal successors, (621), 8 states have internal predecessors, (621), 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)