./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem14_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/Problem14_label04.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 fbc8b86e86cd6737c503bef017b2b1abd25895fb1927b426e7290e477fc0b63c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:24:25,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:24:25,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:24:26,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:24:26,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:24:26,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:24:26,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:24:26,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:24:26,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:24:26,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:24:26,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:24:26,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:24:26,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:24:26,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:24:26,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:24:26,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:24:26,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:24:26,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:24:26,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:24:26,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:24:26,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:24:26,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:24:26,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:24:26,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:24:26,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:24:26,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:24:26,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:24:26,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:24:26,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:24:26,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:24:26,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:24:26,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:24:26,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:24:26,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:24:26,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:24:26,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:24:26,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:24:26,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:24:26,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:24:26,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:24:26,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:24:26,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:24:26,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:24:26,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:24:26,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:24:26,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:24:26,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:24:26,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:24:26,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:24:26,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:24:26,084 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:24:26,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:24:26,085 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:24:26,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:24:26,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:24:26,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:24:26,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:24:26,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:24:26,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:24:26,086 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:24:26,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:24:26,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:24:26,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:24:26,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:24:26,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:24:26,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:24:26,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:24:26,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:24:26,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:24:26,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:24:26,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:24:26,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:24:26,089 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:24:26,089 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:24:26,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:24:26,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:24:26,089 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbc8b86e86cd6737c503bef017b2b1abd25895fb1927b426e7290e477fc0b63c [2021-12-22 09:24:26,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:24:26,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:24:26,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:24:26,295 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:24:26,296 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:24:26,297 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem14_label04.c [2021-12-22 09:24:26,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/719e67e27/a257919cd7124927943ec582fd5925d6/FLAG15d979007 [2021-12-22 09:24:26,697 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:24:26,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem14_label04.c [2021-12-22 09:24:26,706 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/719e67e27/a257919cd7124927943ec582fd5925d6/FLAG15d979007 [2021-12-22 09:24:27,080 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/719e67e27/a257919cd7124927943ec582fd5925d6 [2021-12-22 09:24:27,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:24:27,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:24:27,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:24:27,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:24:27,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:24:27,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:24:27" (1/1) ... [2021-12-22 09:24:27,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a398df1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:24:27, skipping insertion in model container [2021-12-22 09:24:27,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:24:27" (1/1) ... [2021-12-22 09:24:27,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:24:27,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:24:27,292 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/Problem14_label04.c[5382,5395] [2021-12-22 09:24:27,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:24:27,457 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:24:27,481 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/Problem14_label04.c[5382,5395] [2021-12-22 09:24:27,604 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:24:27,613 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:24:27,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:24:27 WrapperNode [2021-12-22 09:24:27,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:24:27,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:24:27,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:24:27,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:24:27,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:24:27" (1/1) ... [2021-12-22 09:24:27,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:24:27" (1/1) ... [2021-12-22 09:24:27,699 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2021-12-22 09:24:27,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:24:27,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:24:27,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:24:27,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:24:27,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:24:27" (1/1) ... [2021-12-22 09:24:27,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:24:27" (1/1) ... [2021-12-22 09:24:27,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:24:27" (1/1) ... [2021-12-22 09:24:27,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:24:27" (1/1) ... [2021-12-22 09:24:27,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:24:27" (1/1) ... [2021-12-22 09:24:27,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:24:27" (1/1) ... [2021-12-22 09:24:27,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:24:27" (1/1) ... [2021-12-22 09:24:27,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:24:27,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:24:27,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:24:27,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:24:27,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:24:27" (1/1) ... [2021-12-22 09:24:27,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:24:27,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:24:27,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 09:24:27,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 09:24:27,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:24:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:24:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:24:27,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:24:27,879 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:24:27,881 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:24:28,593 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:24:28,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:24:28,599 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:24:28,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:24:28 BoogieIcfgContainer [2021-12-22 09:24:28,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:24:28,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:24:28,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:24:28,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:24:28,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:24:27" (1/3) ... [2021-12-22 09:24:28,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41657543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:24:28, skipping insertion in model container [2021-12-22 09:24:28,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:24:27" (2/3) ... [2021-12-22 09:24:28,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41657543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:24:28, skipping insertion in model container [2021-12-22 09:24:28,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:24:28" (3/3) ... [2021-12-22 09:24:28,606 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label04.c [2021-12-22 09:24:28,609 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:24:28,609 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:24:28,639 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:24:28,644 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 09:24:28,644 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:24:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 09:24:28,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:28,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:28,671 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:28,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:28,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1382487458, now seen corresponding path program 1 times [2021-12-22 09:24:28,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:28,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611352542] [2021-12-22 09:24:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:28,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:24:28,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:28,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611352542] [2021-12-22 09:24:28,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611352542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:28,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:24:28,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:24:28,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736954816] [2021-12-22 09:24:28,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:28,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:24:28,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:28,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:24:28,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:24:28,939 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 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 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:30,057 INFO L93 Difference]: Finished difference Result 850 states and 1558 transitions. [2021-12-22 09:24:30,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:24:30,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2021-12-22 09:24:30,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:30,074 INFO L225 Difference]: With dead ends: 850 [2021-12-22 09:24:30,075 INFO L226 Difference]: Without dead ends: 538 [2021-12-22 09:24:30,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:24:30,094 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 484 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:30,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 194 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 09:24:30,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-12-22 09:24:30,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-12-22 09:24:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.4487895716945995) internal successors, (778), 537 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 778 transitions. [2021-12-22 09:24:30,156 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 778 transitions. Word has length 52 [2021-12-22 09:24:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:30,156 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 778 transitions. [2021-12-22 09:24:30,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 778 transitions. [2021-12-22 09:24:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-22 09:24:30,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:30,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:24:30,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:24:30,160 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:30,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:30,161 INFO L85 PathProgramCache]: Analyzing trace with hash 327314734, now seen corresponding path program 1 times [2021-12-22 09:24:30,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:30,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784500592] [2021-12-22 09:24:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:30,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:24:30,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:30,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784500592] [2021-12-22 09:24:30,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784500592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:30,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:24:30,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:24:30,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812951360] [2021-12-22 09:24:30,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:30,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:24:30,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:30,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:24:30,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:24:30,309 INFO L87 Difference]: Start difference. First operand 538 states and 778 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:30,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:30,935 INFO L93 Difference]: Finished difference Result 1281 states and 1978 transitions. [2021-12-22 09:24:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:24:30,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 3 states have internal predecessors, (132), 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 132 [2021-12-22 09:24:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:30,938 INFO L225 Difference]: With dead ends: 1281 [2021-12-22 09:24:30,938 INFO L226 Difference]: Without dead ends: 894 [2021-12-22 09:24:30,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:24:30,940 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 118 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:30,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 119 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 09:24:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-12-22 09:24:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 716. [2021-12-22 09:24:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.220979020979021) internal successors, (873), 715 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 873 transitions. [2021-12-22 09:24:30,957 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 873 transitions. Word has length 132 [2021-12-22 09:24:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:30,958 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 873 transitions. [2021-12-22 09:24:30,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 873 transitions. [2021-12-22 09:24:30,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-22 09:24:30,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:30,965 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:30,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:24:30,965 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:30,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:30,966 INFO L85 PathProgramCache]: Analyzing trace with hash 138717315, now seen corresponding path program 1 times [2021-12-22 09:24:30,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:30,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682120002] [2021-12-22 09:24:30,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:30,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 99 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:24:31,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:31,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682120002] [2021-12-22 09:24:31,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682120002] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:24:31,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578223342] [2021-12-22 09:24:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:31,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:31,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:24:31,136 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:24:31,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:24:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:31,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:24:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:24:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-22 09:24:31,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:24:31,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578223342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:31,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:24:31,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:24:31,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269428780] [2021-12-22 09:24:31,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:31,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:31,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:31,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:31,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:24:31,603 INFO L87 Difference]: Start difference. First operand 716 states and 873 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:32,022 INFO L93 Difference]: Finished difference Result 1608 states and 2071 transitions. [2021-12-22 09:24:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:32,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 223 [2021-12-22 09:24:32,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:32,028 INFO L225 Difference]: With dead ends: 1608 [2021-12-22 09:24:32,028 INFO L226 Difference]: Without dead ends: 1072 [2021-12-22 09:24:32,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:24:32,031 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 131 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:32,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 85 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:24:32,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-12-22 09:24:32,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 894. [2021-12-22 09:24:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 1.211646136618141) internal successors, (1082), 893 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:32,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1082 transitions. [2021-12-22 09:24:32,060 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1082 transitions. Word has length 223 [2021-12-22 09:24:32,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:32,062 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1082 transitions. [2021-12-22 09:24:32,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:32,062 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1082 transitions. [2021-12-22 09:24:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-22 09:24:32,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:32,074 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:32,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 09:24:32,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:32,289 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:32,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:32,290 INFO L85 PathProgramCache]: Analyzing trace with hash 880914236, now seen corresponding path program 1 times [2021-12-22 09:24:32,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:32,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841382275] [2021-12-22 09:24:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:32,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:24:32,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:32,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841382275] [2021-12-22 09:24:32,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841382275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:32,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:24:32,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:24:32,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708954110] [2021-12-22 09:24:32,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:32,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:32,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:32,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:32,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:32,430 INFO L87 Difference]: Start difference. First operand 894 states and 1082 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:32,835 INFO L93 Difference]: Finished difference Result 1964 states and 2415 transitions. [2021-12-22 09:24:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:32,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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 226 [2021-12-22 09:24:32,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:32,839 INFO L225 Difference]: With dead ends: 1964 [2021-12-22 09:24:32,839 INFO L226 Difference]: Without dead ends: 1250 [2021-12-22 09:24:32,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:32,845 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 111 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:32,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 58 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:24:32,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-12-22 09:24:32,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2021-12-22 09:24:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.1753402722177742) internal successors, (1468), 1249 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1468 transitions. [2021-12-22 09:24:32,863 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1468 transitions. Word has length 226 [2021-12-22 09:24:32,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:32,864 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1468 transitions. [2021-12-22 09:24:32,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:32,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1468 transitions. [2021-12-22 09:24:32,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-12-22 09:24:32,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:32,883 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:32,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:24:32,884 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:32,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:32,884 INFO L85 PathProgramCache]: Analyzing trace with hash 142603424, now seen corresponding path program 1 times [2021-12-22 09:24:32,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:32,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705993887] [2021-12-22 09:24:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:32,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 228 proven. 130 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-22 09:24:33,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:33,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705993887] [2021-12-22 09:24:33,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705993887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:24:33,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626017355] [2021-12-22 09:24:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:33,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:33,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:24:33,064 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:24:33,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:24:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:24:33,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:24:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-22 09:24:33,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:24:33,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626017355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:33,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:24:33,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-12-22 09:24:33,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703000977] [2021-12-22 09:24:33,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:33,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:33,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:33,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:33,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:24:33,726 INFO L87 Difference]: Start difference. First operand 1250 states and 1468 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:34,109 INFO L93 Difference]: Finished difference Result 2854 states and 3498 transitions. [2021-12-22 09:24:34,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:34,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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 386 [2021-12-22 09:24:34,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:34,118 INFO L225 Difference]: With dead ends: 2854 [2021-12-22 09:24:34,119 INFO L226 Difference]: Without dead ends: 1962 [2021-12-22 09:24:34,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:24:34,120 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 65 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:34,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 47 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:24:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-12-22 09:24:34,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1962. [2021-12-22 09:24:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.1662417134115248) internal successors, (2287), 1961 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2287 transitions. [2021-12-22 09:24:34,171 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2287 transitions. Word has length 386 [2021-12-22 09:24:34,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:34,172 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 2287 transitions. [2021-12-22 09:24:34,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:34,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2287 transitions. [2021-12-22 09:24:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2021-12-22 09:24:34,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:34,176 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:34,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 09:24:34,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:34,392 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:34,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1255761555, now seen corresponding path program 1 times [2021-12-22 09:24:34,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:34,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116344481] [2021-12-22 09:24:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:34,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-22 09:24:34,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:34,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116344481] [2021-12-22 09:24:34,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116344481] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:24:34,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722936676] [2021-12-22 09:24:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:34,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:34,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:24:34,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:24:34,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 09:24:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:34,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:24:34,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:24:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-12-22 09:24:35,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:24:35,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722936676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:35,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:24:35,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-22 09:24:35,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344773483] [2021-12-22 09:24:35,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:35,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:35,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:35,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:35,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:24:35,232 INFO L87 Difference]: Start difference. First operand 1962 states and 2287 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:35,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:35,620 INFO L93 Difference]: Finished difference Result 2854 states and 3290 transitions. [2021-12-22 09:24:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:35,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 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 432 [2021-12-22 09:24:35,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:35,627 INFO L225 Difference]: With dead ends: 2854 [2021-12-22 09:24:35,627 INFO L226 Difference]: Without dead ends: 2852 [2021-12-22 09:24:35,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:24:35,628 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:35,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 28 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:24:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-12-22 09:24:35,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1784. [2021-12-22 09:24:35,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.1402131239484015) internal successors, (2033), 1783 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2033 transitions. [2021-12-22 09:24:35,653 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2033 transitions. Word has length 432 [2021-12-22 09:24:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:35,653 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 2033 transitions. [2021-12-22 09:24:35,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:35,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2033 transitions. [2021-12-22 09:24:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-12-22 09:24:35,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:35,658 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:35,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 09:24:35,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:35,875 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:35,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:35,875 INFO L85 PathProgramCache]: Analyzing trace with hash -35807260, now seen corresponding path program 1 times [2021-12-22 09:24:35,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:35,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833695205] [2021-12-22 09:24:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:35,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 439 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-22 09:24:36,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:36,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833695205] [2021-12-22 09:24:36,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833695205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:36,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:24:36,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:24:36,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084863014] [2021-12-22 09:24:36,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:36,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:24:36,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:24:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:24:36,019 INFO L87 Difference]: Start difference. First operand 1784 states and 2033 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:36,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:36,490 INFO L93 Difference]: Finished difference Result 3417 states and 3936 transitions. [2021-12-22 09:24:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:24:36,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 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 434 [2021-12-22 09:24:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:36,496 INFO L225 Difference]: With dead ends: 3417 [2021-12-22 09:24:36,496 INFO L226 Difference]: Without dead ends: 1962 [2021-12-22 09:24:36,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:24:36,498 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 125 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:36,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 17 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:24:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-12-22 09:24:36,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1784. [2021-12-22 09:24:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.089736399326977) internal successors, (1943), 1783 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 1943 transitions. [2021-12-22 09:24:36,519 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 1943 transitions. Word has length 434 [2021-12-22 09:24:36,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:36,520 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 1943 transitions. [2021-12-22 09:24:36,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:36,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 1943 transitions. [2021-12-22 09:24:36,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2021-12-22 09:24:36,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:36,522 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:36,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:24:36,522 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1854062487, now seen corresponding path program 1 times [2021-12-22 09:24:36,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:36,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524958416] [2021-12-22 09:24:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:36,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-22 09:24:36,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:36,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524958416] [2021-12-22 09:24:36,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524958416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:36,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:24:36,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:24:36,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898513606] [2021-12-22 09:24:36,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:36,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:36,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:36,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:36,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:36,628 INFO L87 Difference]: Start difference. First operand 1784 states and 1943 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:37,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:37,024 INFO L93 Difference]: Finished difference Result 3922 states and 4347 transitions. [2021-12-22 09:24:37,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:37,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 445 [2021-12-22 09:24:37,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:37,030 INFO L225 Difference]: With dead ends: 3922 [2021-12-22 09:24:37,030 INFO L226 Difference]: Without dead ends: 2496 [2021-12-22 09:24:37,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:37,032 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:37,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 202 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:24:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-12-22 09:24:37,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2496. [2021-12-22 09:24:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 1.092184368737475) internal successors, (2725), 2495 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 2725 transitions. [2021-12-22 09:24:37,063 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 2725 transitions. Word has length 445 [2021-12-22 09:24:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:37,063 INFO L470 AbstractCegarLoop]: Abstraction has 2496 states and 2725 transitions. [2021-12-22 09:24:37,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 2725 transitions. [2021-12-22 09:24:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-12-22 09:24:37,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:37,066 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:37,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:24:37,066 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:37,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:37,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1718197722, now seen corresponding path program 1 times [2021-12-22 09:24:37,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:37,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541621644] [2021-12-22 09:24:37,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:37,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 519 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-22 09:24:37,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:37,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541621644] [2021-12-22 09:24:37,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541621644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:37,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:24:37,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:24:37,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152606198] [2021-12-22 09:24:37,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:37,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:37,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:37,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:37,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:37,198 INFO L87 Difference]: Start difference. First operand 2496 states and 2725 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:37,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:37,580 INFO L93 Difference]: Finished difference Result 5880 states and 6513 transitions. [2021-12-22 09:24:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:37,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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 486 [2021-12-22 09:24:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:37,589 INFO L225 Difference]: With dead ends: 5880 [2021-12-22 09:24:37,589 INFO L226 Difference]: Without dead ends: 3742 [2021-12-22 09:24:37,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:37,592 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 74 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:37,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 50 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:24:37,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2021-12-22 09:24:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3742. [2021-12-22 09:24:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3742 states, 3741 states have (on average 1.0828655439722) internal successors, (4051), 3741 states have internal predecessors, (4051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 4051 transitions. [2021-12-22 09:24:37,632 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 4051 transitions. Word has length 486 [2021-12-22 09:24:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:37,633 INFO L470 AbstractCegarLoop]: Abstraction has 3742 states and 4051 transitions. [2021-12-22 09:24:37,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:37,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 4051 transitions. [2021-12-22 09:24:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2021-12-22 09:24:37,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:37,636 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:37,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 09:24:37,636 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:37,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1589037133, now seen corresponding path program 1 times [2021-12-22 09:24:37,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:37,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141440657] [2021-12-22 09:24:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:37,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 685 proven. 0 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2021-12-22 09:24:37,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:37,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141440657] [2021-12-22 09:24:37,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141440657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:37,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:24:37,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:24:37,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814531570] [2021-12-22 09:24:37,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:37,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:37,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:37,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:37,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:37,776 INFO L87 Difference]: Start difference. First operand 3742 states and 4051 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) [2021-12-22 09:24:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:38,152 INFO L93 Difference]: Finished difference Result 6948 states and 7546 transitions. [2021-12-22 09:24:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:38,152 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 522 [2021-12-22 09:24:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:38,160 INFO L225 Difference]: With dead ends: 6948 [2021-12-22 09:24:38,160 INFO L226 Difference]: Without dead ends: 3564 [2021-12-22 09:24:38,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:38,163 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 103 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:38,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 242 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 09:24:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-12-22 09:24:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 3208. [2021-12-22 09:24:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 1.078578110383536) internal successors, (3459), 3207 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 3459 transitions. [2021-12-22 09:24:38,197 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 3459 transitions. Word has length 522 [2021-12-22 09:24:38,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:38,198 INFO L470 AbstractCegarLoop]: Abstraction has 3208 states and 3459 transitions. [2021-12-22 09:24:38,198 INFO L471 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) [2021-12-22 09:24:38,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 3459 transitions. [2021-12-22 09:24:38,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2021-12-22 09:24:38,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:38,201 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:38,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:24:38,202 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:38,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:38,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1310836641, now seen corresponding path program 1 times [2021-12-22 09:24:38,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:38,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886845283] [2021-12-22 09:24:38,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:38,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 892 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-22 09:24:38,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:38,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886845283] [2021-12-22 09:24:38,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886845283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:24:38,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576941488] [2021-12-22 09:24:38,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:38,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:38,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:24:38,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:24:38,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 09:24:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:38,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:24:38,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:24:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 892 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-22 09:24:39,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:24:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 892 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-12-22 09:24:40,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576941488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:24:40,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:24:40,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-22 09:24:40,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490336800] [2021-12-22 09:24:40,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:24:40,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 09:24:40,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:40,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 09:24:40,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:24:40,156 INFO L87 Difference]: Start difference. First operand 3208 states and 3459 transitions. Second operand has 6 states, 6 states have (on average 116.5) internal successors, (699), 6 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:40,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:40,930 INFO L93 Difference]: Finished difference Result 7482 states and 8139 transitions. [2021-12-22 09:24:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 09:24:40,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 116.5) internal successors, (699), 6 states have internal predecessors, (699), 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 641 [2021-12-22 09:24:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:40,940 INFO L225 Difference]: With dead ends: 7482 [2021-12-22 09:24:40,941 INFO L226 Difference]: Without dead ends: 4632 [2021-12-22 09:24:40,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1284 GetRequests, 1280 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:24:40,943 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 361 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:40,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 64 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:24:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2021-12-22 09:24:40,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 4276. [2021-12-22 09:24:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4276 states, 4275 states have (on average 1.0776608187134502) internal successors, (4607), 4275 states have internal predecessors, (4607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 4607 transitions. [2021-12-22 09:24:40,992 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 4607 transitions. Word has length 641 [2021-12-22 09:24:40,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:40,992 INFO L470 AbstractCegarLoop]: Abstraction has 4276 states and 4607 transitions. [2021-12-22 09:24:40,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 116.5) internal successors, (699), 6 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:40,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 4607 transitions. [2021-12-22 09:24:40,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2021-12-22 09:24:40,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:40,997 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:41,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 09:24:41,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:41,215 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:41,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:41,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2043682623, now seen corresponding path program 1 times [2021-12-22 09:24:41,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:41,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375404277] [2021-12-22 09:24:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:41,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 1038 proven. 0 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2021-12-22 09:24:41,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:41,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375404277] [2021-12-22 09:24:41,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375404277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:41,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:24:41,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:24:41,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406337685] [2021-12-22 09:24:41,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:41,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:41,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:41,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:41,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:41,425 INFO L87 Difference]: Start difference. First operand 4276 states and 4607 transitions. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:41,863 INFO L93 Difference]: Finished difference Result 9618 states and 10448 transitions. [2021-12-22 09:24:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:41,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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 713 [2021-12-22 09:24:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:41,888 INFO L225 Difference]: With dead ends: 9618 [2021-12-22 09:24:41,888 INFO L226 Difference]: Without dead ends: 5700 [2021-12-22 09:24:41,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:41,893 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 110 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:41,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 37 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:24:41,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5700 states. [2021-12-22 09:24:41,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5700 to 5344. [2021-12-22 09:24:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5344 states, 5343 states have (on average 1.078420363091896) internal successors, (5762), 5343 states have internal predecessors, (5762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 5762 transitions. [2021-12-22 09:24:41,966 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 5762 transitions. Word has length 713 [2021-12-22 09:24:41,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:41,966 INFO L470 AbstractCegarLoop]: Abstraction has 5344 states and 5762 transitions. [2021-12-22 09:24:41,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 5762 transitions. [2021-12-22 09:24:41,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2021-12-22 09:24:41,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:41,972 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:41,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:24:41,972 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:41,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:41,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1828962068, now seen corresponding path program 1 times [2021-12-22 09:24:41,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:41,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591027299] [2021-12-22 09:24:41,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:41,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 1146 proven. 93 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2021-12-22 09:24:42,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:42,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591027299] [2021-12-22 09:24:42,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591027299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:24:42,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963808728] [2021-12-22 09:24:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:42,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:42,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:24:42,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:24:42,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 09:24:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:42,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:24:42,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:24:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 1239 proven. 0 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2021-12-22 09:24:43,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:24:43,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963808728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:43,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:24:43,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:24:43,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124145928] [2021-12-22 09:24:43,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:43,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:43,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:43,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:43,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:24:43,568 INFO L87 Difference]: Start difference. First operand 5344 states and 5762 transitions. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:43,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:43,937 INFO L93 Difference]: Finished difference Result 10864 states and 11716 transitions. [2021-12-22 09:24:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:43,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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 731 [2021-12-22 09:24:43,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:43,945 INFO L225 Difference]: With dead ends: 10864 [2021-12-22 09:24:43,945 INFO L226 Difference]: Without dead ends: 5878 [2021-12-22 09:24:43,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 730 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:24:43,950 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 8 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:43,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 64 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 09:24:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-12-22 09:24:43,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 5522. [2021-12-22 09:24:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5522 states, 5521 states have (on average 1.0760731751494295) internal successors, (5941), 5521 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5522 states to 5522 states and 5941 transitions. [2021-12-22 09:24:44,005 INFO L78 Accepts]: Start accepts. Automaton has 5522 states and 5941 transitions. Word has length 731 [2021-12-22 09:24:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:44,006 INFO L470 AbstractCegarLoop]: Abstraction has 5522 states and 5941 transitions. [2021-12-22 09:24:44,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:44,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5522 states and 5941 transitions. [2021-12-22 09:24:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2021-12-22 09:24:44,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:44,011 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:44,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 09:24:44,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 09:24:44,226 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:44,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:44,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1867062169, now seen corresponding path program 1 times [2021-12-22 09:24:44,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:44,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604786347] [2021-12-22 09:24:44,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:44,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1758 backedges. 1071 proven. 0 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2021-12-22 09:24:44,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:44,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604786347] [2021-12-22 09:24:44,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604786347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:44,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:24:44,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:24:44,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189054063] [2021-12-22 09:24:44,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:44,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:44,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:44,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:44,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:44,419 INFO L87 Difference]: Start difference. First operand 5522 states and 5941 transitions. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:44,780 INFO L93 Difference]: Finished difference Result 10864 states and 11735 transitions. [2021-12-22 09:24:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:44,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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 758 [2021-12-22 09:24:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:44,787 INFO L225 Difference]: With dead ends: 10864 [2021-12-22 09:24:44,787 INFO L226 Difference]: Without dead ends: 5700 [2021-12-22 09:24:44,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:44,792 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 21 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:44,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 227 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 09:24:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5700 states. [2021-12-22 09:24:44,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5700 to 5700. [2021-12-22 09:24:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5700 states, 5699 states have (on average 1.0701877522372345) internal successors, (6099), 5699 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:44,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5700 states to 5700 states and 6099 transitions. [2021-12-22 09:24:44,845 INFO L78 Accepts]: Start accepts. Automaton has 5700 states and 6099 transitions. Word has length 758 [2021-12-22 09:24:44,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:44,846 INFO L470 AbstractCegarLoop]: Abstraction has 5700 states and 6099 transitions. [2021-12-22 09:24:44,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:44,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5700 states and 6099 transitions. [2021-12-22 09:24:44,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 809 [2021-12-22 09:24:44,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:44,852 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:44,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 09:24:44,853 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:44,853 INFO L85 PathProgramCache]: Analyzing trace with hash -540711606, now seen corresponding path program 1 times [2021-12-22 09:24:44,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:44,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464989145] [2021-12-22 09:24:44,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:44,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2231 backedges. 1215 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-12-22 09:24:45,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:45,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464989145] [2021-12-22 09:24:45,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464989145] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:24:45,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523827369] [2021-12-22 09:24:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:45,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:45,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:24:45,196 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:24:45,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 09:24:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:45,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 09:24:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:24:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2231 backedges. 928 proven. 0 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2021-12-22 09:24:46,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:24:46,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523827369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:46,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:24:46,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-12-22 09:24:46,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512436646] [2021-12-22 09:24:46,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:46,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:24:46,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:46,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:24:46,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:24:46,611 INFO L87 Difference]: Start difference. First operand 5700 states and 6099 transitions. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:47,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:47,068 INFO L93 Difference]: Finished difference Result 7532 states and 8149 transitions. [2021-12-22 09:24:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:24:47,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 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 808 [2021-12-22 09:24:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:47,077 INFO L225 Difference]: With dead ends: 7532 [2021-12-22 09:24:47,077 INFO L226 Difference]: Without dead ends: 7530 [2021-12-22 09:24:47,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 806 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:24:47,080 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 87 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:47,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 47 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 445 Invalid, 0 Unknown, 282 Unchecked, 0.4s Time] [2021-12-22 09:24:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7530 states. [2021-12-22 09:24:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7530 to 7352. [2021-12-22 09:24:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7352 states, 7351 states have (on average 1.0835260508774316) internal successors, (7965), 7351 states have internal predecessors, (7965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7352 states to 7352 states and 7965 transitions. [2021-12-22 09:24:47,149 INFO L78 Accepts]: Start accepts. Automaton has 7352 states and 7965 transitions. Word has length 808 [2021-12-22 09:24:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:47,150 INFO L470 AbstractCegarLoop]: Abstraction has 7352 states and 7965 transitions. [2021-12-22 09:24:47,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 7352 states and 7965 transitions. [2021-12-22 09:24:47,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2021-12-22 09:24:47,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:47,156 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:24:47,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 09:24:47,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 09:24:47,374 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:47,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:47,375 INFO L85 PathProgramCache]: Analyzing trace with hash -172725225, now seen corresponding path program 1 times [2021-12-22 09:24:47,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:47,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166165123] [2021-12-22 09:24:47,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:47,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1954 backedges. 837 proven. 2 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-12-22 09:24:47,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:47,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166165123] [2021-12-22 09:24:47,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166165123] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:24:47,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979295573] [2021-12-22 09:24:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:47,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:47,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:24:47,696 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:24:47,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 09:24:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:47,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:24:47,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:24:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1954 backedges. 839 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-12-22 09:24:48,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:24:48,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979295573] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:48,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:24:48,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:24:48,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042722327] [2021-12-22 09:24:48,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:48,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:48,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:48,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:48,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:24:48,953 INFO L87 Difference]: Start difference. First operand 7352 states and 7965 transitions. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:49,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:49,357 INFO L93 Difference]: Finished difference Result 14702 states and 15940 transitions. [2021-12-22 09:24:49,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:49,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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 810 [2021-12-22 09:24:49,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:49,368 INFO L225 Difference]: With dead ends: 14702 [2021-12-22 09:24:49,368 INFO L226 Difference]: Without dead ends: 7708 [2021-12-22 09:24:49,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 813 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:24:49,374 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 71 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:49,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 245 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 09:24:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7708 states. [2021-12-22 09:24:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7708 to 7174. [2021-12-22 09:24:49,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7174 states, 7173 states have (on average 1.0770946605325527) internal successors, (7726), 7173 states have internal predecessors, (7726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7174 states to 7174 states and 7726 transitions. [2021-12-22 09:24:49,442 INFO L78 Accepts]: Start accepts. Automaton has 7174 states and 7726 transitions. Word has length 810 [2021-12-22 09:24:49,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:49,443 INFO L470 AbstractCegarLoop]: Abstraction has 7174 states and 7726 transitions. [2021-12-22 09:24:49,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:49,443 INFO L276 IsEmpty]: Start isEmpty. Operand 7174 states and 7726 transitions. [2021-12-22 09:24:49,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2021-12-22 09:24:49,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:49,449 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:49,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 09:24:49,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:49,667 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:49,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:49,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2108387026, now seen corresponding path program 1 times [2021-12-22 09:24:49,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:49,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745150104] [2021-12-22 09:24:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:49,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 1251 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-12-22 09:24:49,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:49,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745150104] [2021-12-22 09:24:49,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745150104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:24:49,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578868969] [2021-12-22 09:24:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:49,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:49,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:24:49,904 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:24:49,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 09:24:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:50,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 09:24:50,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:24:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 964 proven. 0 refuted. 0 times theorem prover too weak. 1303 trivial. 0 not checked. [2021-12-22 09:24:51,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:24:51,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578868969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:51,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:24:51,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-12-22 09:24:51,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143700921] [2021-12-22 09:24:51,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:51,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:24:51,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:51,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:24:51,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:24:51,490 INFO L87 Difference]: Start difference. First operand 7174 states and 7726 transitions. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:51,882 INFO L93 Difference]: Finished difference Result 7760 states and 8334 transitions. [2021-12-22 09:24:51,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:24:51,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 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 841 [2021-12-22 09:24:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:51,892 INFO L225 Difference]: With dead ends: 7760 [2021-12-22 09:24:51,892 INFO L226 Difference]: Without dead ends: 7758 [2021-12-22 09:24:51,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 839 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:24:51,894 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 55 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:51,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 46 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 445 Invalid, 0 Unknown, 298 Unchecked, 0.4s Time] [2021-12-22 09:24:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7758 states. [2021-12-22 09:24:51,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7758 to 7174. [2021-12-22 09:24:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7174 states, 7173 states have (on average 1.0770946605325527) internal successors, (7726), 7173 states have internal predecessors, (7726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7174 states to 7174 states and 7726 transitions. [2021-12-22 09:24:51,982 INFO L78 Accepts]: Start accepts. Automaton has 7174 states and 7726 transitions. Word has length 841 [2021-12-22 09:24:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:51,982 INFO L470 AbstractCegarLoop]: Abstraction has 7174 states and 7726 transitions. [2021-12-22 09:24:51,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:51,983 INFO L276 IsEmpty]: Start isEmpty. Operand 7174 states and 7726 transitions. [2021-12-22 09:24:51,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2021-12-22 09:24:51,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:51,988 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:52,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 09:24:52,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 09:24:52,206 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:52,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:52,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1692043947, now seen corresponding path program 1 times [2021-12-22 09:24:52,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:52,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400099262] [2021-12-22 09:24:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:52,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 1252 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-12-22 09:24:52,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:52,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400099262] [2021-12-22 09:24:52,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400099262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:24:52,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112452244] [2021-12-22 09:24:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:52,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:52,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:24:52,440 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:24:52,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 09:24:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:52,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 09:24:52,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:24:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 1340 proven. 537 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-22 09:24:55,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:25:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 1324 proven. 0 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-12-22 09:25:01,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112452244] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 09:25:01,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 09:25:01,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 13 [2021-12-22 09:25:01,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936578648] [2021-12-22 09:25:01,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:25:01,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 09:25:01,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:25:01,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 09:25:01,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=99, Unknown=1, NotChecked=0, Total=156 [2021-12-22 09:25:01,328 INFO L87 Difference]: Start difference. First operand 7174 states and 7726 transitions. Second operand has 5 states, 5 states have (on average 89.2) internal successors, (446), 5 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:25:01,841 INFO L93 Difference]: Finished difference Result 14456 states and 15578 transitions. [2021-12-22 09:25:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:25:01,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 89.2) internal successors, (446), 5 states have internal predecessors, (446), 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 842 [2021-12-22 09:25:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:25:01,854 INFO L225 Difference]: With dead ends: 14456 [2021-12-22 09:25:01,854 INFO L226 Difference]: Without dead ends: 7640 [2021-12-22 09:25:01,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1687 GetRequests, 1676 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=56, Invalid=99, Unknown=1, NotChecked=0, Total=156 [2021-12-22 09:25:01,859 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 131 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:25:01,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 69 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 571 Invalid, 0 Unknown, 231 Unchecked, 0.4s Time] [2021-12-22 09:25:01,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7640 states. [2021-12-22 09:25:01,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7640 to 7390. [2021-12-22 09:25:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7390 states, 7389 states have (on average 1.0755176613885506) internal successors, (7947), 7389 states have internal predecessors, (7947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7390 states to 7390 states and 7947 transitions. [2021-12-22 09:25:01,917 INFO L78 Accepts]: Start accepts. Automaton has 7390 states and 7947 transitions. Word has length 842 [2021-12-22 09:25:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:25:01,918 INFO L470 AbstractCegarLoop]: Abstraction has 7390 states and 7947 transitions. [2021-12-22 09:25:01,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.2) internal successors, (446), 5 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 7390 states and 7947 transitions. [2021-12-22 09:25:01,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2021-12-22 09:25:01,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:25:01,924 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:25:01,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 09:25:02,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 09:25:02,142 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:25:02,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:25:02,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1769411558, now seen corresponding path program 1 times [2021-12-22 09:25:02,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:25:02,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516090791] [2021-12-22 09:25:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:25:02,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:25:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:25:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 1259 proven. 72 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-12-22 09:25:02,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:25:02,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516090791] [2021-12-22 09:25:02,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516090791] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:25:02,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112039451] [2021-12-22 09:25:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:25:02,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:25:02,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:25:02,576 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:25:02,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 09:25:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:25:02,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 09:25:02,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:25:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 1340 proven. 544 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-22 09:25:05,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:25:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 1331 proven. 0 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2021-12-22 09:25:06,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112039451] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 09:25:06,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 09:25:06,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 13 [2021-12-22 09:25:06,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661412293] [2021-12-22 09:25:06,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:25:06,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 09:25:06,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:25:06,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 09:25:06,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-22 09:25:06,276 INFO L87 Difference]: Start difference. First operand 7390 states and 7947 transitions. Second operand has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:06,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:25:06,796 INFO L93 Difference]: Finished difference Result 14778 states and 15913 transitions. [2021-12-22 09:25:06,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:25:06,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 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 849 [2021-12-22 09:25:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:25:06,829 INFO L225 Difference]: With dead ends: 14778 [2021-12-22 09:25:06,830 INFO L226 Difference]: Without dead ends: 7746 [2021-12-22 09:25:06,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1701 GetRequests, 1690 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-22 09:25:06,834 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 287 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:25:06,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 10 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 09:25:06,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7746 states. [2021-12-22 09:25:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7746 to 7390. [2021-12-22 09:25:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7390 states, 7389 states have (on average 1.0755176613885506) internal successors, (7947), 7389 states have internal predecessors, (7947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7390 states to 7390 states and 7947 transitions. [2021-12-22 09:25:06,894 INFO L78 Accepts]: Start accepts. Automaton has 7390 states and 7947 transitions. Word has length 849 [2021-12-22 09:25:06,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:25:06,894 INFO L470 AbstractCegarLoop]: Abstraction has 7390 states and 7947 transitions. [2021-12-22 09:25:06,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:06,894 INFO L276 IsEmpty]: Start isEmpty. Operand 7390 states and 7947 transitions. [2021-12-22 09:25:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 854 [2021-12-22 09:25:06,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:25:06,900 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:25:06,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-22 09:25:07,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:25:07,118 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:25:07,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:25:07,119 INFO L85 PathProgramCache]: Analyzing trace with hash 725789310, now seen corresponding path program 1 times [2021-12-22 09:25:07,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:25:07,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574983085] [2021-12-22 09:25:07,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:25:07,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:25:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:25:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2264 backedges. 1270 proven. 0 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2021-12-22 09:25:07,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:25:07,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574983085] [2021-12-22 09:25:07,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574983085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:25:07,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:25:07,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:25:07,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897153285] [2021-12-22 09:25:07,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:25:07,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:25:07,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:25:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:25:07,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:25:07,309 INFO L87 Difference]: Start difference. First operand 7390 states and 7947 transitions. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:25:07,721 INFO L93 Difference]: Finished difference Result 14600 states and 15723 transitions. [2021-12-22 09:25:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:25:07,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 853 [2021-12-22 09:25:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:25:07,731 INFO L225 Difference]: With dead ends: 14600 [2021-12-22 09:25:07,731 INFO L226 Difference]: Without dead ends: 7568 [2021-12-22 09:25:07,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:25:07,737 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:25:07,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 226 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:25:07,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7568 states. [2021-12-22 09:25:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7568 to 7390. [2021-12-22 09:25:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7390 states, 7389 states have (on average 1.0691568547841386) internal successors, (7900), 7389 states have internal predecessors, (7900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:07,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7390 states to 7390 states and 7900 transitions. [2021-12-22 09:25:07,813 INFO L78 Accepts]: Start accepts. Automaton has 7390 states and 7900 transitions. Word has length 853 [2021-12-22 09:25:07,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:25:07,814 INFO L470 AbstractCegarLoop]: Abstraction has 7390 states and 7900 transitions. [2021-12-22 09:25:07,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:07,814 INFO L276 IsEmpty]: Start isEmpty. Operand 7390 states and 7900 transitions. [2021-12-22 09:25:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2021-12-22 09:25:07,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:25:07,849 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 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, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:25:07,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 09:25:07,849 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:25:07,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:25:07,850 INFO L85 PathProgramCache]: Analyzing trace with hash 460020198, now seen corresponding path program 1 times [2021-12-22 09:25:07,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:25:07,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63246369] [2021-12-22 09:25:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:25:07,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:25:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:25:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2763 backedges. 881 proven. 0 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2021-12-22 09:25:08,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:25:08,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63246369] [2021-12-22 09:25:08,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63246369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:25:08,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:25:08,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 09:25:08,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471385507] [2021-12-22 09:25:08,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:25:08,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 09:25:08,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:25:08,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 09:25:08,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:25:08,122 INFO L87 Difference]: Start difference. First operand 7390 states and 7900 transitions. Second operand has 7 states, 7 states have (on average 43.0) internal successors, (301), 6 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:08,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:25:08,820 INFO L93 Difference]: Finished difference Result 14266 states and 15259 transitions. [2021-12-22 09:25:08,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 09:25:08,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 43.0) internal successors, (301), 6 states have internal predecessors, (301), 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 877 [2021-12-22 09:25:08,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:25:08,829 INFO L225 Difference]: With dead ends: 14266 [2021-12-22 09:25:08,829 INFO L226 Difference]: Without dead ends: 7134 [2021-12-22 09:25:08,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:25:08,834 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 96 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:25:08,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 33 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 09:25:08,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2021-12-22 09:25:08,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 7034. [2021-12-22 09:25:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7034 states, 7033 states have (on average 1.0629887672401535) internal successors, (7476), 7033 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 7476 transitions. [2021-12-22 09:25:08,899 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 7476 transitions. Word has length 877 [2021-12-22 09:25:08,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:25:08,899 INFO L470 AbstractCegarLoop]: Abstraction has 7034 states and 7476 transitions. [2021-12-22 09:25:08,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 43.0) internal successors, (301), 6 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 7476 transitions. [2021-12-22 09:25:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2021-12-22 09:25:08,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:25:08,906 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:25:08,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 09:25:08,906 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:25:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:25:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2126525007, now seen corresponding path program 1 times [2021-12-22 09:25:08,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:25:08,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451783401] [2021-12-22 09:25:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:25:08,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:25:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:25:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2513 backedges. 868 proven. 418 refuted. 0 times theorem prover too weak. 1227 trivial. 0 not checked. [2021-12-22 09:25:09,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:25:09,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451783401] [2021-12-22 09:25:09,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451783401] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:25:09,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169079978] [2021-12-22 09:25:09,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:25:09,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:25:09,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:25:09,260 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:25:09,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 09:25:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:25:09,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 09:25:09,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:25:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2513 backedges. 629 proven. 769 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-12-22 09:25:14,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:25:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2513 backedges. 762 proven. 0 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-12-22 09:25:15,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169079978] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 09:25:15,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 09:25:15,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 7] total 15 [2021-12-22 09:25:15,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325299297] [2021-12-22 09:25:15,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:25:15,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:25:15,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:25:15,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:25:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-22 09:25:15,951 INFO L87 Difference]: Start difference. First operand 7034 states and 7476 transitions. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:25:16,395 INFO L93 Difference]: Finished difference Result 7086 states and 7527 transitions. [2021-12-22 09:25:16,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:25:16,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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 927 [2021-12-22 09:25:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:25:16,403 INFO L225 Difference]: With dead ends: 7086 [2021-12-22 09:25:16,403 INFO L226 Difference]: Without dead ends: 7034 [2021-12-22 09:25:16,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1858 GetRequests, 1845 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-22 09:25:16,406 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 251 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:25:16,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 10 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 09:25:16,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7034 states. [2021-12-22 09:25:16,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7034 to 7034. [2021-12-22 09:25:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7034 states, 7033 states have (on average 1.0622778330726574) internal successors, (7471), 7033 states have internal predecessors, (7471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 7471 transitions. [2021-12-22 09:25:16,475 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 7471 transitions. Word has length 927 [2021-12-22 09:25:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:25:16,475 INFO L470 AbstractCegarLoop]: Abstraction has 7034 states and 7471 transitions. [2021-12-22 09:25:16,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:25:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 7471 transitions. [2021-12-22 09:25:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2021-12-22 09:25:16,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:25:16,483 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:25:16,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 09:25:16,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-22 09:25:16,701 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:25:16,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:25:16,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2053273363, now seen corresponding path program 1 times [2021-12-22 09:25:16,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:25:16,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575946752] [2021-12-22 09:25:16,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:25:16,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:25:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:25:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2585 backedges. 940 proven. 418 refuted. 0 times theorem prover too weak. 1227 trivial. 0 not checked. [2021-12-22 09:25:16,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:25:16,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575946752] [2021-12-22 09:25:16,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575946752] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:25:16,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364354733] [2021-12-22 09:25:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:25:16,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:25:16,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:25:16,996 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:25:16,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 09:25:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:25:17,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 09:25:17,216 INFO L286 TraceCheckSpWp]: Computing forward predicates...