./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label33.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/Problem15_label33.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 3b224e5b59fa802cc1cab883bc2ee3c11a4d9f971ca8ff2d73a49e3c295424dc --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:29:13,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:29:13,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:29:13,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:29:13,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:29:13,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:29:13,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:29:13,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:29:13,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:29:13,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:29:13,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:29:13,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:29:13,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:29:13,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:29:13,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:29:13,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:29:13,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:29:13,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:29:13,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:29:13,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:29:13,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:29:13,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:29:13,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:29:13,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:29:13,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:29:13,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:29:13,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:29:13,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:29:13,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:29:13,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:29:13,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:29:13,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:29:13,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:29:13,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:29:13,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:29:13,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:29:13,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:29:13,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:29:13,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:29:13,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:29:13,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:29:13,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:29:13,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:29:13,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:29:13,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:29:13,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:29:13,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:29:13,549 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:29:13,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:29:13,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:29:13,550 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:29:13,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:29:13,551 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:29:13,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:29:13,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:29:13,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:29:13,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:29:13,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:29:13,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:29:13,553 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:29:13,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:29:13,553 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:29:13,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:29:13,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:29:13,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:29:13,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:29:13,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:29:13,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:29:13,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:29:13,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:29:13,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:29:13,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:29:13,555 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:29:13,555 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:29:13,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:29:13,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:29:13,556 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b224e5b59fa802cc1cab883bc2ee3c11a4d9f971ca8ff2d73a49e3c295424dc [2021-12-22 09:29:13,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:29:13,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:29:13,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:29:13,815 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:29:13,815 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:29:13,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label33.c [2021-12-22 09:29:13,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad4943f3d/3c6389451172458fabf966367f92952e/FLAG94ff1a777 [2021-12-22 09:29:14,503 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:29:14,504 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label33.c [2021-12-22 09:29:14,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad4943f3d/3c6389451172458fabf966367f92952e/FLAG94ff1a777 [2021-12-22 09:29:14,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad4943f3d/3c6389451172458fabf966367f92952e [2021-12-22 09:29:14,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:29:14,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:29:14,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:29:14,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:29:14,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:29:14,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:29:14" (1/1) ... [2021-12-22 09:29:14,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b3a9787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:29:14, skipping insertion in model container [2021-12-22 09:29:14,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:29:14" (1/1) ... [2021-12-22 09:29:14,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:29:14,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:29:15,113 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/Problem15_label33.c[2841,2854] [2021-12-22 09:29:15,422 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:29:15,429 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:29:15,454 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/Problem15_label33.c[2841,2854] [2021-12-22 09:29:15,627 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:29:15,641 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:29:15,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:29:15 WrapperNode [2021-12-22 09:29:15,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:29:15,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:29:15,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:29:15,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:29:15,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:29:15" (1/1) ... [2021-12-22 09:29:15,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:29:15" (1/1) ... [2021-12-22 09:29:15,860 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-22 09:29:15,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:29:15,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:29:15,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:29:15,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:29:15,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:29:15" (1/1) ... [2021-12-22 09:29:15,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:29:15" (1/1) ... [2021-12-22 09:29:15,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:29:15" (1/1) ... [2021-12-22 09:29:15,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:29:15" (1/1) ... [2021-12-22 09:29:15,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:29:15" (1/1) ... [2021-12-22 09:29:15,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:29:15" (1/1) ... [2021-12-22 09:29:16,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:29:15" (1/1) ... [2021-12-22 09:29:16,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:29:16,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:29:16,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:29:16,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:29:16,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:29:15" (1/1) ... [2021-12-22 09:29:16,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:29:16,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:29:16,108 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 09:29:16,115 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 09:29:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:29:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:29:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:29:16,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:29:16,260 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:29:16,263 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:29:18,558 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:29:18,573 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:29:18,574 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:29:18,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:29:18 BoogieIcfgContainer [2021-12-22 09:29:18,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:29:18,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:29:18,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:29:18,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:29:18,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:29:14" (1/3) ... [2021-12-22 09:29:18,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1adf4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:29:18, skipping insertion in model container [2021-12-22 09:29:18,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:29:15" (2/3) ... [2021-12-22 09:29:18,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1adf4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:29:18, skipping insertion in model container [2021-12-22 09:29:18,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:29:18" (3/3) ... [2021-12-22 09:29:18,585 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label33.c [2021-12-22 09:29:18,589 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:29:18,589 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:29:18,645 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:29:18,653 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 09:29:18,653 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:29:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 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 09:29:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 09:29:18,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:18,696 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] [2021-12-22 09:29:18,696 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:18,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:18,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1644072970, now seen corresponding path program 1 times [2021-12-22 09:29:18,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:18,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446665760] [2021-12-22 09:29:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:18,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:18,912 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 09:29:18,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:18,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446665760] [2021-12-22 09:29:18,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446665760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:18,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:29:18,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:29:18,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81747080] [2021-12-22 09:29:18,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:18,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:18,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:18,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:18,949 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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 09:29:21,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:21,010 INFO L93 Difference]: Finished difference Result 1154 states and 2106 transitions. [2021-12-22 09:29:21,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:29:21,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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 22 [2021-12-22 09:29:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:21,026 INFO L225 Difference]: With dead ends: 1154 [2021-12-22 09:29:21,026 INFO L226 Difference]: Without dead ends: 665 [2021-12-22 09:29:21,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:21,033 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 299 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:21,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 383 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-22 09:29:21,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-12-22 09:29:21,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663. [2021-12-22 09:29:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.4818731117824773) internal successors, (981), 662 states have internal predecessors, (981), 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 09:29:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 981 transitions. [2021-12-22 09:29:21,094 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 981 transitions. Word has length 22 [2021-12-22 09:29:21,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:21,094 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 981 transitions. [2021-12-22 09:29:21,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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 09:29:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 981 transitions. [2021-12-22 09:29:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-22 09:29:21,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:21,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:29:21,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:29:21,098 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:21,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash -45802427, now seen corresponding path program 1 times [2021-12-22 09:29:21,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:21,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781900883] [2021-12-22 09:29:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:21,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:29:21,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:21,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781900883] [2021-12-22 09:29:21,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781900883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:21,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:29:21,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:29:21,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274222358] [2021-12-22 09:29:21,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:21,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:21,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:21,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:21,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:21,221 INFO L87 Difference]: Start difference. First operand 663 states and 981 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 09:29:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:22,656 INFO L93 Difference]: Finished difference Result 1624 states and 2315 transitions. [2021-12-22 09:29:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:29:22,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 87 [2021-12-22 09:29:22,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:22,661 INFO L225 Difference]: With dead ends: 1624 [2021-12-22 09:29:22,661 INFO L226 Difference]: Without dead ends: 963 [2021-12-22 09:29:22,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:22,665 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 237 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:22,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 337 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 09:29:22,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-12-22 09:29:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-12-22 09:29:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.362785862785863) internal successors, (1311), 962 states have internal predecessors, (1311), 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 09:29:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1311 transitions. [2021-12-22 09:29:22,705 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1311 transitions. Word has length 87 [2021-12-22 09:29:22,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:22,705 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1311 transitions. [2021-12-22 09:29:22,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 09:29:22,706 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1311 transitions. [2021-12-22 09:29:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-22 09:29:22,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:22,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:29:22,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:29:22,708 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:22,709 INFO L85 PathProgramCache]: Analyzing trace with hash 623723668, now seen corresponding path program 1 times [2021-12-22 09:29:22,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:22,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192759255] [2021-12-22 09:29:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:22,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:29:22,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:22,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192759255] [2021-12-22 09:29:22,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192759255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:22,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:29:22,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:29:22,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901324874] [2021-12-22 09:29:22,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:22,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 09:29:22,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:22,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 09:29:22,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:29:22,819 INFO L87 Difference]: Start difference. First operand 963 states and 1311 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 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 09:29:24,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:24,659 INFO L93 Difference]: Finished difference Result 2244 states and 3201 transitions. [2021-12-22 09:29:24,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:29:24,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 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 92 [2021-12-22 09:29:24,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:24,666 INFO L225 Difference]: With dead ends: 2244 [2021-12-22 09:29:24,666 INFO L226 Difference]: Without dead ends: 1582 [2021-12-22 09:29:24,668 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 09:29:24,675 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 362 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:24,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 365 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-22 09:29:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-12-22 09:29:24,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1266. [2021-12-22 09:29:24,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 1.3043478260869565) internal successors, (1650), 1265 states have internal predecessors, (1650), 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 09:29:24,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1650 transitions. [2021-12-22 09:29:24,710 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1650 transitions. Word has length 92 [2021-12-22 09:29:24,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:24,712 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1650 transitions. [2021-12-22 09:29:24,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 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 09:29:24,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1650 transitions. [2021-12-22 09:29:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-22 09:29:24,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:24,725 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:29:24,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:29:24,726 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:24,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:24,726 INFO L85 PathProgramCache]: Analyzing trace with hash 54482937, now seen corresponding path program 1 times [2021-12-22 09:29:24,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:24,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374813873] [2021-12-22 09:29:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:24,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:29:24,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:24,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374813873] [2021-12-22 09:29:24,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374813873] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:24,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:29:24,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:29:24,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804826941] [2021-12-22 09:29:24,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:24,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:29:24,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:24,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:29:24,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:29:24,895 INFO L87 Difference]: Start difference. First operand 1266 states and 1650 transitions. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 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 09:29:27,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:27,637 INFO L93 Difference]: Finished difference Result 4668 states and 6169 transitions. [2021-12-22 09:29:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:29:27,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 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 188 [2021-12-22 09:29:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:27,652 INFO L225 Difference]: With dead ends: 4668 [2021-12-22 09:29:27,652 INFO L226 Difference]: Without dead ends: 3404 [2021-12-22 09:29:27,654 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 09:29:27,661 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 488 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:27,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 346 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1953 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 09:29:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2021-12-22 09:29:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 3381. [2021-12-22 09:29:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 1.2363905325443787) internal successors, (4179), 3380 states have internal predecessors, (4179), 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 09:29:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 4179 transitions. [2021-12-22 09:29:27,736 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 4179 transitions. Word has length 188 [2021-12-22 09:29:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:27,737 INFO L470 AbstractCegarLoop]: Abstraction has 3381 states and 4179 transitions. [2021-12-22 09:29:27,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 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 09:29:27,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 4179 transitions. [2021-12-22 09:29:27,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-22 09:29:27,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:27,740 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:29:27,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:29:27,740 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:27,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2015607761, now seen corresponding path program 1 times [2021-12-22 09:29:27,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:27,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901830035] [2021-12-22 09:29:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:27,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 09:29:27,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901830035] [2021-12-22 09:29:27,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901830035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:27,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:29:27,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:29:27,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649700192] [2021-12-22 09:29:27,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:27,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:27,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:27,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:27,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:27,897 INFO L87 Difference]: Start difference. First operand 3381 states and 4179 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 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 09:29:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:29,159 INFO L93 Difference]: Finished difference Result 8563 states and 10751 transitions. [2021-12-22 09:29:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:29:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 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 192 [2021-12-22 09:29:29,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:29,181 INFO L225 Difference]: With dead ends: 8563 [2021-12-22 09:29:29,181 INFO L226 Difference]: Without dead ends: 5483 [2021-12-22 09:29:29,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:29,186 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:29,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:29:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2021-12-22 09:29:29,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5478. [2021-12-22 09:29:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.1683403322987036) internal successors, (6399), 5477 states have internal predecessors, (6399), 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 09:29:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6399 transitions. [2021-12-22 09:29:29,309 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6399 transitions. Word has length 192 [2021-12-22 09:29:29,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:29,311 INFO L470 AbstractCegarLoop]: Abstraction has 5478 states and 6399 transitions. [2021-12-22 09:29:29,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 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 09:29:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6399 transitions. [2021-12-22 09:29:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-12-22 09:29:29,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:29,318 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:29:29,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:29:29,320 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:29,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1797140107, now seen corresponding path program 1 times [2021-12-22 09:29:29,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:29,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745825918] [2021-12-22 09:29:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:29,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 09:29:29,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:29,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745825918] [2021-12-22 09:29:29,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745825918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:29,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:29:29,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:29:29,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939194216] [2021-12-22 09:29:29,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:29,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:29,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:29,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:29,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:29,540 INFO L87 Difference]: Start difference. First operand 5478 states and 6399 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 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 09:29:30,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:30,688 INFO L93 Difference]: Finished difference Result 10655 states and 12485 transitions. [2021-12-22 09:29:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:29:30,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 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 294 [2021-12-22 09:29:30,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:30,707 INFO L225 Difference]: With dead ends: 10655 [2021-12-22 09:29:30,708 INFO L226 Difference]: Without dead ends: 5478 [2021-12-22 09:29:30,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:30,716 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:30,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:29:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-12-22 09:29:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 5478. [2021-12-22 09:29:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.1672448420668249) internal successors, (6393), 5477 states have internal predecessors, (6393), 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 09:29:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6393 transitions. [2021-12-22 09:29:30,831 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6393 transitions. Word has length 294 [2021-12-22 09:29:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:30,831 INFO L470 AbstractCegarLoop]: Abstraction has 5478 states and 6393 transitions. [2021-12-22 09:29:30,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 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 09:29:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6393 transitions. [2021-12-22 09:29:30,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-12-22 09:29:30,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:30,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:29:30,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:29:30,836 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:30,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:30,837 INFO L85 PathProgramCache]: Analyzing trace with hash 80345414, now seen corresponding path program 1 times [2021-12-22 09:29:30,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:30,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115320967] [2021-12-22 09:29:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:30,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 09:29:30,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:30,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115320967] [2021-12-22 09:29:30,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115320967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:30,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:29:30,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:29:30,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471738562] [2021-12-22 09:29:30,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:30,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:30,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:30,975 INFO L87 Difference]: Start difference. First operand 5478 states and 6393 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 09:29:32,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:32,579 INFO L93 Difference]: Finished difference Result 11851 states and 14145 transitions. [2021-12-22 09:29:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:29:32,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 309 [2021-12-22 09:29:32,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:32,601 INFO L225 Difference]: With dead ends: 11851 [2021-12-22 09:29:32,602 INFO L226 Difference]: Without dead ends: 6674 [2021-12-22 09:29:32,608 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 09:29:32,609 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 293 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:32,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 322 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:29:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6674 states. [2021-12-22 09:29:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6674 to 4577. [2021-12-22 09:29:32,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4577 states, 4576 states have (on average 1.1840034965034965) internal successors, (5418), 4576 states have internal predecessors, (5418), 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 09:29:32,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4577 states to 4577 states and 5418 transitions. [2021-12-22 09:29:32,708 INFO L78 Accepts]: Start accepts. Automaton has 4577 states and 5418 transitions. Word has length 309 [2021-12-22 09:29:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:32,708 INFO L470 AbstractCegarLoop]: Abstraction has 4577 states and 5418 transitions. [2021-12-22 09:29:32,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 09:29:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 4577 states and 5418 transitions. [2021-12-22 09:29:32,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-12-22 09:29:32,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:32,714 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:29:32,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:29:32,714 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:32,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:32,715 INFO L85 PathProgramCache]: Analyzing trace with hash 617556295, now seen corresponding path program 1 times [2021-12-22 09:29:32,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:32,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219113834] [2021-12-22 09:29:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:32,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 39 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:29:33,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:33,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219113834] [2021-12-22 09:29:33,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219113834] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:29:33,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111876395] [2021-12-22 09:29:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:33,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:29:33,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:29:33,059 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 09:29:33,115 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 09:29:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:33,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:29:33,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:29:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:29:33,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:29:33,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111876395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:33,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:29:33,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-22 09:29:33,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569997532] [2021-12-22 09:29:33,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:33,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:33,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:33,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:33,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:29:33,853 INFO L87 Difference]: Start difference. First operand 4577 states and 5418 transitions. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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 09:29:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:35,304 INFO L93 Difference]: Finished difference Result 10958 states and 13239 transitions. [2021-12-22 09:29:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:29:35,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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 368 [2021-12-22 09:29:35,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:35,325 INFO L225 Difference]: With dead ends: 10958 [2021-12-22 09:29:35,325 INFO L226 Difference]: Without dead ends: 6682 [2021-12-22 09:29:35,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:29:35,331 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 249 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:35,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 345 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 09:29:35,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6682 states. [2021-12-22 09:29:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6682 to 6380. [2021-12-22 09:29:35,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6380 states, 6379 states have (on average 1.166483774886346) internal successors, (7441), 6379 states have internal predecessors, (7441), 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 09:29:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6380 states to 6380 states and 7441 transitions. [2021-12-22 09:29:35,412 INFO L78 Accepts]: Start accepts. Automaton has 6380 states and 7441 transitions. Word has length 368 [2021-12-22 09:29:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:35,413 INFO L470 AbstractCegarLoop]: Abstraction has 6380 states and 7441 transitions. [2021-12-22 09:29:35,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 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 09:29:35,413 INFO L276 IsEmpty]: Start isEmpty. Operand 6380 states and 7441 transitions. [2021-12-22 09:29:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-12-22 09:29:35,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:35,419 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:29:35,444 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 09:29:35,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:29:35,644 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:35,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1152331073, now seen corresponding path program 1 times [2021-12-22 09:29:35,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:35,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794573778] [2021-12-22 09:29:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:35,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 241 proven. 39 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 09:29:35,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:35,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794573778] [2021-12-22 09:29:35,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794573778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:29:35,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376439090] [2021-12-22 09:29:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:35,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:29:35,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:29:35,841 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 09:29:35,879 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 09:29:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:35,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 09:29:35,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:29:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 241 proven. 39 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 09:29:36,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:29:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 241 proven. 39 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 09:29:38,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376439090] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:29:38,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:29:38,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-22 09:29:38,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913723741] [2021-12-22 09:29:38,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:29:38,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 09:29:38,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:38,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 09:29:38,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:29:38,082 INFO L87 Difference]: Start difference. First operand 6380 states and 7441 transitions. Second operand has 9 states, 9 states have (on average 72.66666666666667) internal successors, (654), 8 states have internal predecessors, (654), 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 09:29:43,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:43,455 INFO L93 Difference]: Finished difference Result 18999 states and 21936 transitions. [2021-12-22 09:29:43,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 09:29:43,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 72.66666666666667) internal successors, (654), 8 states have internal predecessors, (654), 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 385 [2021-12-22 09:29:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:43,491 INFO L225 Difference]: With dead ends: 18999 [2021-12-22 09:29:43,491 INFO L226 Difference]: Without dead ends: 7278 [2021-12-22 09:29:43,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 764 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-22 09:29:43,503 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 2856 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 6167 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2856 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 6895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 6167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:43,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2856 Valid, 285 Invalid, 6895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 6167 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-22 09:29:43,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7278 states. [2021-12-22 09:29:43,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7278 to 6677. [2021-12-22 09:29:43,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6677 states, 6676 states have (on average 1.1065008987417615) internal successors, (7387), 6676 states have internal predecessors, (7387), 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 09:29:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6677 states to 6677 states and 7387 transitions. [2021-12-22 09:29:43,607 INFO L78 Accepts]: Start accepts. Automaton has 6677 states and 7387 transitions. Word has length 385 [2021-12-22 09:29:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:43,608 INFO L470 AbstractCegarLoop]: Abstraction has 6677 states and 7387 transitions. [2021-12-22 09:29:43,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 72.66666666666667) internal successors, (654), 8 states have internal predecessors, (654), 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 09:29:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 6677 states and 7387 transitions. [2021-12-22 09:29:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-12-22 09:29:43,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:43,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:29:43,643 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 09:29:43,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-22 09:29:43,840 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:43,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:43,841 INFO L85 PathProgramCache]: Analyzing trace with hash -295380571, now seen corresponding path program 1 times [2021-12-22 09:29:43,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:43,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761455435] [2021-12-22 09:29:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:43,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-22 09:29:43,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:43,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761455435] [2021-12-22 09:29:43,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761455435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:43,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:29:43,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:29:43,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924495443] [2021-12-22 09:29:43,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:43,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:43,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:43,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:43,996 INFO L87 Difference]: Start difference. First operand 6677 states and 7387 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 09:29:44,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:44,989 INFO L93 Difference]: Finished difference Result 15147 states and 16840 transitions. [2021-12-22 09:29:44,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:29:44,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 399 [2021-12-22 09:29:44,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:45,003 INFO L225 Difference]: With dead ends: 15147 [2021-12-22 09:29:45,003 INFO L226 Difference]: Without dead ends: 8472 [2021-12-22 09:29:45,011 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 09:29:45,012 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 303 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:45,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 549 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:29:45,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8472 states. [2021-12-22 09:29:45,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8472 to 8171. [2021-12-22 09:29:45,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8171 states, 8170 states have (on average 1.086046511627907) internal successors, (8873), 8170 states have internal predecessors, (8873), 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 09:29:45,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 8873 transitions. [2021-12-22 09:29:45,160 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 8873 transitions. Word has length 399 [2021-12-22 09:29:45,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:45,160 INFO L470 AbstractCegarLoop]: Abstraction has 8171 states and 8873 transitions. [2021-12-22 09:29:45,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 09:29:45,161 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 8873 transitions. [2021-12-22 09:29:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2021-12-22 09:29:45,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:45,164 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:29:45,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:29:45,165 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:45,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:45,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1744934925, now seen corresponding path program 1 times [2021-12-22 09:29:45,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:45,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648093923] [2021-12-22 09:29:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:45,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-22 09:29:45,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:45,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648093923] [2021-12-22 09:29:45,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648093923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:45,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:29:45,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:29:45,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629405694] [2021-12-22 09:29:45,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:45,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:45,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:45,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:45,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:45,382 INFO L87 Difference]: Start difference. First operand 8171 states and 8873 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 09:29:46,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:46,211 INFO L93 Difference]: Finished difference Result 16338 states and 17786 transitions. [2021-12-22 09:29:46,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:29:46,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 523 [2021-12-22 09:29:46,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:46,224 INFO L225 Difference]: With dead ends: 16338 [2021-12-22 09:29:46,224 INFO L226 Difference]: Without dead ends: 8468 [2021-12-22 09:29:46,231 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 09:29:46,232 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 438 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:46,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 70 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:29:46,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8468 states. [2021-12-22 09:29:46,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8468 to 8169. [2021-12-22 09:29:46,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8169 states, 8168 states have (on average 1.085822722820764) internal successors, (8869), 8168 states have internal predecessors, (8869), 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 09:29:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8169 states to 8169 states and 8869 transitions. [2021-12-22 09:29:46,361 INFO L78 Accepts]: Start accepts. Automaton has 8169 states and 8869 transitions. Word has length 523 [2021-12-22 09:29:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:46,362 INFO L470 AbstractCegarLoop]: Abstraction has 8169 states and 8869 transitions. [2021-12-22 09:29:46,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 09:29:46,362 INFO L276 IsEmpty]: Start isEmpty. Operand 8169 states and 8869 transitions. [2021-12-22 09:29:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2021-12-22 09:29:46,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:46,367 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:29:46,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 09:29:46,367 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:46,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:46,368 INFO L85 PathProgramCache]: Analyzing trace with hash 403777590, now seen corresponding path program 1 times [2021-12-22 09:29:46,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:46,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835610476] [2021-12-22 09:29:46,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:46,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-12-22 09:29:46,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:46,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835610476] [2021-12-22 09:29:46,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835610476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:46,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:29:46,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:29:46,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708223518] [2021-12-22 09:29:46,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:46,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:46,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:46,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:46,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:46,599 INFO L87 Difference]: Start difference. First operand 8169 states and 8869 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 09:29:47,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:47,773 INFO L93 Difference]: Finished difference Result 19054 states and 20734 transitions. [2021-12-22 09:29:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:29:47,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 549 [2021-12-22 09:29:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:47,786 INFO L225 Difference]: With dead ends: 19054 [2021-12-22 09:29:47,786 INFO L226 Difference]: Without dead ends: 10887 [2021-12-22 09:29:47,793 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 09:29:47,795 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 315 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:47,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 250 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 09:29:47,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10887 states. [2021-12-22 09:29:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 8471. [2021-12-22 09:29:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8471 states, 8470 states have (on average 1.084297520661157) internal successors, (9184), 8470 states have internal predecessors, (9184), 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 09:29:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8471 states to 8471 states and 9184 transitions. [2021-12-22 09:29:47,924 INFO L78 Accepts]: Start accepts. Automaton has 8471 states and 9184 transitions. Word has length 549 [2021-12-22 09:29:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:47,925 INFO L470 AbstractCegarLoop]: Abstraction has 8471 states and 9184 transitions. [2021-12-22 09:29:47,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 09:29:47,925 INFO L276 IsEmpty]: Start isEmpty. Operand 8471 states and 9184 transitions. [2021-12-22 09:29:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2021-12-22 09:29:47,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:47,931 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:29:47,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:29:47,932 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:47,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1462599689, now seen corresponding path program 1 times [2021-12-22 09:29:47,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:47,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737472202] [2021-12-22 09:29:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:47,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-22 09:29:48,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:48,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737472202] [2021-12-22 09:29:48,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737472202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:48,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:29:48,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:29:48,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708841282] [2021-12-22 09:29:48,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:48,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:48,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:48,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:48,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:48,134 INFO L87 Difference]: Start difference. First operand 8471 states and 9184 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 09:29:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:49,009 INFO L93 Difference]: Finished difference Result 19630 states and 21365 transitions. [2021-12-22 09:29:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:29:49,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 557 [2021-12-22 09:29:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:49,061 INFO L225 Difference]: With dead ends: 19630 [2021-12-22 09:29:49,062 INFO L226 Difference]: Without dead ends: 11161 [2021-12-22 09:29:49,070 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 09:29:49,072 INFO L933 BasicCegarLoop]: 500 mSDtfsCounter, 294 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:49,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 538 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:29:49,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11161 states. [2021-12-22 09:29:49,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11161 to 10563. [2021-12-22 09:29:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10563 states, 10562 states have (on average 1.0707252414315471) internal successors, (11309), 10562 states have internal predecessors, (11309), 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 09:29:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10563 states to 10563 states and 11309 transitions. [2021-12-22 09:29:49,206 INFO L78 Accepts]: Start accepts. Automaton has 10563 states and 11309 transitions. Word has length 557 [2021-12-22 09:29:49,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:49,207 INFO L470 AbstractCegarLoop]: Abstraction has 10563 states and 11309 transitions. [2021-12-22 09:29:49,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 09:29:49,207 INFO L276 IsEmpty]: Start isEmpty. Operand 10563 states and 11309 transitions. [2021-12-22 09:29:49,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2021-12-22 09:29:49,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:49,212 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:29:49,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 09:29:49,213 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1954156080, now seen corresponding path program 1 times [2021-12-22 09:29:49,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:49,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324294750] [2021-12-22 09:29:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:49,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 306 proven. 106 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 09:29:49,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:49,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324294750] [2021-12-22 09:29:49,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324294750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:29:49,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888166844] [2021-12-22 09:29:49,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:49,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:29:49,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:29:49,494 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 09:29:49,504 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 09:29:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:49,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:29:49,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:29:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-12-22 09:29:50,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:29:50,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888166844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:50,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:29:50,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:29:50,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193611561] [2021-12-22 09:29:50,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:50,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:50,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:50,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:50,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:29:50,553 INFO L87 Difference]: Start difference. First operand 10563 states and 11309 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 09:29:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:51,675 INFO L93 Difference]: Finished difference Result 25026 states and 26919 transitions. [2021-12-22 09:29:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:29:51,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 560 [2021-12-22 09:29:51,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:51,687 INFO L225 Difference]: With dead ends: 25026 [2021-12-22 09:29:51,687 INFO L226 Difference]: Without dead ends: 14465 [2021-12-22 09:29:51,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:29:51,696 INFO L933 BasicCegarLoop]: 494 mSDtfsCounter, 302 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:51,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 528 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 09:29:51,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14465 states. [2021-12-22 09:29:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14465 to 14454. [2021-12-22 09:29:51,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14454 states, 14453 states have (on average 1.0642081228810627) internal successors, (15381), 14453 states have internal predecessors, (15381), 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 09:29:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14454 states to 14454 states and 15381 transitions. [2021-12-22 09:29:51,866 INFO L78 Accepts]: Start accepts. Automaton has 14454 states and 15381 transitions. Word has length 560 [2021-12-22 09:29:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:51,867 INFO L470 AbstractCegarLoop]: Abstraction has 14454 states and 15381 transitions. [2021-12-22 09:29:51,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 09:29:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 14454 states and 15381 transitions. [2021-12-22 09:29:51,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2021-12-22 09:29:51,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:51,872 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:29:51,895 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 09:29:52,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:29:52,096 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:52,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:52,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1191492702, now seen corresponding path program 1 times [2021-12-22 09:29:52,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:52,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693227736] [2021-12-22 09:29:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:52,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 229 proven. 264 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-22 09:29:52,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:52,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693227736] [2021-12-22 09:29:52,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693227736] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:29:52,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156265681] [2021-12-22 09:29:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:52,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:29:52,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:29:52,369 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 09:29:52,409 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 09:29:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:52,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:29:52,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:29:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-12-22 09:29:53,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:29:53,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156265681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:53,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:29:53,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-22 09:29:53,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895385349] [2021-12-22 09:29:53,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:53,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:53,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:53,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:53,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:29:53,287 INFO L87 Difference]: Start difference. First operand 14454 states and 15381 transitions. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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 09:29:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:54,242 INFO L93 Difference]: Finished difference Result 32194 states and 34307 transitions. [2021-12-22 09:29:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:29:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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 561 [2021-12-22 09:29:54,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:54,254 INFO L225 Difference]: With dead ends: 32194 [2021-12-22 09:29:54,254 INFO L226 Difference]: Without dead ends: 18041 [2021-12-22 09:29:54,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 561 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:29:54,260 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 332 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:54,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 419 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:29:54,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18041 states. [2021-12-22 09:29:54,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18041 to 14453. [2021-12-22 09:29:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14453 states, 14452 states have (on average 1.0677414890672572) internal successors, (15431), 14452 states have internal predecessors, (15431), 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 09:29:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14453 states to 14453 states and 15431 transitions. [2021-12-22 09:29:54,420 INFO L78 Accepts]: Start accepts. Automaton has 14453 states and 15431 transitions. Word has length 561 [2021-12-22 09:29:54,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:54,421 INFO L470 AbstractCegarLoop]: Abstraction has 14453 states and 15431 transitions. [2021-12-22 09:29:54,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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 09:29:54,422 INFO L276 IsEmpty]: Start isEmpty. Operand 14453 states and 15431 transitions. [2021-12-22 09:29:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2021-12-22 09:29:54,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:54,431 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 09:29:54,455 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 09:29:54,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 09:29:54,655 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:54,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:54,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1533077222, now seen corresponding path program 1 times [2021-12-22 09:29:54,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:54,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802923225] [2021-12-22 09:29:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:54,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-12-22 09:29:54,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:54,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802923225] [2021-12-22 09:29:54,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802923225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:54,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:29:54,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:29:54,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402066503] [2021-12-22 09:29:54,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:54,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:54,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:54,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:54,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:54,883 INFO L87 Difference]: Start difference. First operand 14453 states and 15431 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 09:29:55,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:55,859 INFO L93 Difference]: Finished difference Result 32789 states and 35166 transitions. [2021-12-22 09:29:55,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:29:55,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 647 [2021-12-22 09:29:55,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:55,873 INFO L225 Difference]: With dead ends: 32789 [2021-12-22 09:29:55,873 INFO L226 Difference]: Without dead ends: 18338 [2021-12-22 09:29:55,883 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 09:29:55,884 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 336 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:55,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 165 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:29:55,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18338 states. [2021-12-22 09:29:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18338 to 17141. [2021-12-22 09:29:56,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17141 states, 17140 states have (on average 1.0593932322053676) internal successors, (18158), 17140 states have internal predecessors, (18158), 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 09:29:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17141 states to 17141 states and 18158 transitions. [2021-12-22 09:29:56,072 INFO L78 Accepts]: Start accepts. Automaton has 17141 states and 18158 transitions. Word has length 647 [2021-12-22 09:29:56,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:56,072 INFO L470 AbstractCegarLoop]: Abstraction has 17141 states and 18158 transitions. [2021-12-22 09:29:56,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 09:29:56,073 INFO L276 IsEmpty]: Start isEmpty. Operand 17141 states and 18158 transitions. [2021-12-22 09:29:56,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2021-12-22 09:29:56,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:56,082 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 09:29:56,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 09:29:56,083 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:56,083 INFO L85 PathProgramCache]: Analyzing trace with hash -272361112, now seen corresponding path program 1 times [2021-12-22 09:29:56,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:56,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806573705] [2021-12-22 09:29:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:56,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-12-22 09:29:56,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:56,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806573705] [2021-12-22 09:29:56,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806573705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:56,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:29:56,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:29:56,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499092466] [2021-12-22 09:29:56,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:56,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:56,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:56,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:56,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:29:56,335 INFO L87 Difference]: Start difference. First operand 17141 states and 18158 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 09:29:57,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:29:57,259 INFO L93 Difference]: Finished difference Result 37268 states and 39641 transitions. [2021-12-22 09:29:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:29:57,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 647 [2021-12-22 09:29:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:29:57,280 INFO L225 Difference]: With dead ends: 37268 [2021-12-22 09:29:57,280 INFO L226 Difference]: Without dead ends: 20129 [2021-12-22 09:29:57,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 09:29:57,293 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 339 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:29:57,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 134 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:29:57,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20129 states. [2021-12-22 09:29:57,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20129 to 19231. [2021-12-22 09:29:57,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19231 states, 19230 states have (on average 1.059854394175767) internal successors, (20381), 19230 states have internal predecessors, (20381), 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 09:29:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19231 states to 19231 states and 20381 transitions. [2021-12-22 09:29:57,463 INFO L78 Accepts]: Start accepts. Automaton has 19231 states and 20381 transitions. Word has length 647 [2021-12-22 09:29:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:29:57,463 INFO L470 AbstractCegarLoop]: Abstraction has 19231 states and 20381 transitions. [2021-12-22 09:29:57,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 09:29:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 19231 states and 20381 transitions. [2021-12-22 09:29:57,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2021-12-22 09:29:57,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:29:57,475 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:29:57,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 09:29:57,476 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:29:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:29:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash 125938064, now seen corresponding path program 1 times [2021-12-22 09:29:57,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:29:57,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939741982] [2021-12-22 09:29:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:57,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:29:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 411 proven. 98 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-12-22 09:29:57,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:29:57,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939741982] [2021-12-22 09:29:57,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939741982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:29:57,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685510731] [2021-12-22 09:29:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:29:57,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:29:57,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:29:57,782 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 09:29:57,808 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 09:29:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:29:57,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:29:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:29:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 507 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-12-22 09:29:59,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:29:59,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685510731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:29:59,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:29:59,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-22 09:29:59,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797550024] [2021-12-22 09:29:59,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:29:59,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:29:59,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:29:59,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:29:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:29:59,044 INFO L87 Difference]: Start difference. First operand 19231 states and 20381 transitions. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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 09:30:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:00,031 INFO L93 Difference]: Finished difference Result 40871 states and 43288 transitions. [2021-12-22 09:30:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:30:00,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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 668 [2021-12-22 09:30:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:00,056 INFO L225 Difference]: With dead ends: 40871 [2021-12-22 09:30:00,056 INFO L226 Difference]: Without dead ends: 21941 [2021-12-22 09:30:00,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:30:00,061 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 263 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:00,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 148 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:30:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21941 states. [2021-12-22 09:30:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21941 to 18931. [2021-12-22 09:30:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18931 states, 18930 states have (on average 1.0565768621236133) internal successors, (20001), 18930 states have internal predecessors, (20001), 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 09:30:00,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18931 states to 18931 states and 20001 transitions. [2021-12-22 09:30:00,206 INFO L78 Accepts]: Start accepts. Automaton has 18931 states and 20001 transitions. Word has length 668 [2021-12-22 09:30:00,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:00,207 INFO L470 AbstractCegarLoop]: Abstraction has 18931 states and 20001 transitions. [2021-12-22 09:30:00,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 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 09:30:00,207 INFO L276 IsEmpty]: Start isEmpty. Operand 18931 states and 20001 transitions. [2021-12-22 09:30:00,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2021-12-22 09:30:00,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:00,216 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:00,239 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 09:30:00,433 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,SelfDestructingSolverStorable17 [2021-12-22 09:30:00,433 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:00,434 INFO L85 PathProgramCache]: Analyzing trace with hash 502470634, now seen corresponding path program 1 times [2021-12-22 09:30:00,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:00,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033512818] [2021-12-22 09:30:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:00,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 407 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-12-22 09:30:00,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:00,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033512818] [2021-12-22 09:30:00,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033512818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:30:00,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:30:00,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:30:00,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585369482] [2021-12-22 09:30:00,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:30:00,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:30:00,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:00,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:30:00,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:30:00,717 INFO L87 Difference]: Start difference. First operand 18931 states and 20001 transitions. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 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 09:30:01,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:30:01,902 INFO L93 Difference]: Finished difference Result 38034 states and 40190 transitions. [2021-12-22 09:30:01,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 09:30:01,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 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 680 [2021-12-22 09:30:01,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:30:01,918 INFO L225 Difference]: With dead ends: 38034 [2021-12-22 09:30:01,918 INFO L226 Difference]: Without dead ends: 19404 [2021-12-22 09:30:01,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:30:01,929 INFO L933 BasicCegarLoop]: 460 mSDtfsCounter, 455 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:30:01,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 516 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 09:30:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19404 states. [2021-12-22 09:30:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19404 to 18632. [2021-12-22 09:30:02,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18632 states, 18631 states have (on average 1.0561966614781815) internal successors, (19678), 18631 states have internal predecessors, (19678), 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 09:30:02,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18632 states to 18632 states and 19678 transitions. [2021-12-22 09:30:02,073 INFO L78 Accepts]: Start accepts. Automaton has 18632 states and 19678 transitions. Word has length 680 [2021-12-22 09:30:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:30:02,073 INFO L470 AbstractCegarLoop]: Abstraction has 18632 states and 19678 transitions. [2021-12-22 09:30:02,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 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 09:30:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 18632 states and 19678 transitions. [2021-12-22 09:30:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2021-12-22 09:30:02,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:30:02,083 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:30:02,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 09:30:02,084 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:30:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:30:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1805975336, now seen corresponding path program 1 times [2021-12-22 09:30:02,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:30:02,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356791996] [2021-12-22 09:30:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:02,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:30:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 566 proven. 106 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-22 09:30:02,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:30:02,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356791996] [2021-12-22 09:30:02,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356791996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:30:02,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574987534] [2021-12-22 09:30:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:30:02,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:30:02,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:30:02,395 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 09:30:02,397 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 09:30:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:30:02,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 09:30:02,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:30:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 566 proven. 106 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-22 09:30:03,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:30:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 566 proven. 106 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-22 09:30:07,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574987534] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:30:07,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:30:07,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-22 09:30:07,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176803417] [2021-12-22 09:30:07,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:30:07,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 09:30:07,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:30:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 09:30:07,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:30:07,117 INFO L87 Difference]: Start difference. First operand 18632 states and 19678 transitions. Second operand has 9 states, 9 states have (on average 149.22222222222223) internal successors, (1343), 8 states have internal predecessors, (1343), 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)