./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label15.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label15.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro --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 c9240c4aeadc96e65569656f5eb1191209fe6aaacfd216b5c85e62d05a03467a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:13:18,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:13:18,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:13:18,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:13:18,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:13:18,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:13:18,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:13:18,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:13:18,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:13:18,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:13:18,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:13:18,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:13:18,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:13:18,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:13:18,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:13:18,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:13:18,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:13:18,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:13:18,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:13:18,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:13:18,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:13:18,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:13:18,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:13:18,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:13:18,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:13:18,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:13:18,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:13:18,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:13:18,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:13:18,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:13:18,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:13:18,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:13:18,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:13:18,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:13:18,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:13:18,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:13:18,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:13:18,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:13:18,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:13:18,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:13:18,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:13:18,380 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:13:18,404 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:13:18,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:13:18,405 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:13:18,405 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:13:18,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:13:18,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:13:18,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:13:18,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:13:18,408 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:13:18,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:13:18,409 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:13:18,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:13:18,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:13:18,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:13:18,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:13:18,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:13:18,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:13:18,410 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:13:18,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:13:18,411 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:13:18,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:13:18,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:13:18,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:13:18,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:13:18,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:13:18,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:13:18,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:13:18,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:13:18,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:13:18,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:13:18,414 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:13:18,414 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:13:18,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:13:18,415 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9240c4aeadc96e65569656f5eb1191209fe6aaacfd216b5c85e62d05a03467a [2022-11-18 20:13:18,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:13:18,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:13:18,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:13:18,737 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:13:18,739 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:13:18,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/eca-rers2012/Problem03_label15.c [2022-11-18 20:13:18,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/data/ece4760d8/4a2d2afb5adc4639a8d5ff50f5714ab0/FLAG11427c742 [2022-11-18 20:13:19,645 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:13:19,646 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/sv-benchmarks/c/eca-rers2012/Problem03_label15.c [2022-11-18 20:13:19,661 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/data/ece4760d8/4a2d2afb5adc4639a8d5ff50f5714ab0/FLAG11427c742 [2022-11-18 20:13:19,738 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/data/ece4760d8/4a2d2afb5adc4639a8d5ff50f5714ab0 [2022-11-18 20:13:19,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:13:19,746 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:13:19,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:13:19,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:13:19,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:13:19,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:13:19" (1/1) ... [2022-11-18 20:13:19,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b8384e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:19, skipping insertion in model container [2022-11-18 20:13:19,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:13:19" (1/1) ... [2022-11-18 20:13:19,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:13:19,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:13:20,713 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/sv-benchmarks/c/eca-rers2012/Problem03_label15.c[61228,61241] [2022-11-18 20:13:20,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:13:20,762 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:13:21,036 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/sv-benchmarks/c/eca-rers2012/Problem03_label15.c[61228,61241] [2022-11-18 20:13:21,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:13:21,068 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:13:21,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:21 WrapperNode [2022-11-18 20:13:21,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:13:21,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:13:21,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:13:21,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:13:21,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:21" (1/1) ... [2022-11-18 20:13:21,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:21" (1/1) ... [2022-11-18 20:13:21,268 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-18 20:13:21,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:13:21,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:13:21,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:13:21,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:13:21,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:21" (1/1) ... [2022-11-18 20:13:21,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:21" (1/1) ... [2022-11-18 20:13:21,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:21" (1/1) ... [2022-11-18 20:13:21,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:21" (1/1) ... [2022-11-18 20:13:21,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:21" (1/1) ... [2022-11-18 20:13:21,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:21" (1/1) ... [2022-11-18 20:13:21,412 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:21" (1/1) ... [2022-11-18 20:13:21,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:21" (1/1) ... [2022-11-18 20:13:21,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:13:21,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:13:21,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:13:21,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:13:21,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:21" (1/1) ... [2022-11-18 20:13:21,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:13:21,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:21,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:13:21,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:13:21,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:13:21,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:13:21,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:13:21,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:13:21,695 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:13:21,698 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:13:24,219 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:13:24,242 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:13:24,242 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 20:13:24,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:13:24 BoogieIcfgContainer [2022-11-18 20:13:24,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:13:24,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:13:24,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:13:24,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:13:24,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:13:19" (1/3) ... [2022-11-18 20:13:24,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4b7606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:13:24, skipping insertion in model container [2022-11-18 20:13:24,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:13:21" (2/3) ... [2022-11-18 20:13:24,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4b7606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:13:24, skipping insertion in model container [2022-11-18 20:13:24,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:13:24" (3/3) ... [2022-11-18 20:13:24,263 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label15.c [2022-11-18 20:13:24,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:13:24,288 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:13:24,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:13:24,383 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2a4cf68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:13:24,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:13:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-18 20:13:24,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:24,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:13:24,414 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:13:24,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:24,421 INFO L85 PathProgramCache]: Analyzing trace with hash -910941086, now seen corresponding path program 1 times [2022-11-18 20:13:24,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:24,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4743864] [2022-11-18 20:13:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:24,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:26,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:26,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4743864] [2022-11-18 20:13:26,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4743864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:26,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:13:26,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:13:26,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166589368] [2022-11-18 20:13:26,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:26,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:26,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:26,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:26,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:26,180 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:27,825 INFO L93 Difference]: Finished difference Result 824 states and 1460 transitions. [2022-11-18 20:13:27,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:27,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 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 200 [2022-11-18 20:13:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:27,863 INFO L225 Difference]: With dead ends: 824 [2022-11-18 20:13:27,864 INFO L226 Difference]: Without dead ends: 445 [2022-11-18 20:13:27,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:27,882 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:27,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 245 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-18 20:13:27,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-11-18 20:13:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 444. [2022-11-18 20:13:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.4221218961625282) internal successors, (630), 443 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:27,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 630 transitions. [2022-11-18 20:13:28,000 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 630 transitions. Word has length 200 [2022-11-18 20:13:28,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:28,006 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 630 transitions. [2022-11-18 20:13:28,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 630 transitions. [2022-11-18 20:13:28,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-18 20:13:28,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:28,022 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 20:13:28,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:13:28,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:13:28,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1872130817, now seen corresponding path program 1 times [2022-11-18 20:13:28,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:28,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661152885] [2022-11-18 20:13:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:28,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:28,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:28,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661152885] [2022-11-18 20:13:28,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661152885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:28,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:13:28,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:13:28,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506108722] [2022-11-18 20:13:28,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:28,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:28,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:28,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:28,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:28,458 INFO L87 Difference]: Start difference. First operand 444 states and 630 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:29,711 INFO L93 Difference]: Finished difference Result 1312 states and 1869 transitions. [2022-11-18 20:13:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:29,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2022-11-18 20:13:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:29,716 INFO L225 Difference]: With dead ends: 1312 [2022-11-18 20:13:29,717 INFO L226 Difference]: Without dead ends: 870 [2022-11-18 20:13:29,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:29,720 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:29,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 20:13:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-11-18 20:13:29,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 856. [2022-11-18 20:13:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.3883040935672515) internal successors, (1187), 855 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1187 transitions. [2022-11-18 20:13:29,759 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1187 transitions. Word has length 208 [2022-11-18 20:13:29,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:29,760 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1187 transitions. [2022-11-18 20:13:29,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:29,760 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1187 transitions. [2022-11-18 20:13:29,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-18 20:13:29,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:29,765 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:13:29,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:13:29,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:13:29,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:29,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1580219308, now seen corresponding path program 1 times [2022-11-18 20:13:29,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:29,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88817131] [2022-11-18 20:13:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:29,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:13:30,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:30,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88817131] [2022-11-18 20:13:30,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88817131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:30,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:13:30,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:13:30,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649581151] [2022-11-18 20:13:30,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:30,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:13:30,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:30,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:13:30,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:13:30,817 INFO L87 Difference]: Start difference. First operand 856 states and 1187 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:32,312 INFO L93 Difference]: Finished difference Result 1863 states and 2639 transitions. [2022-11-18 20:13:32,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:13:32,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 215 [2022-11-18 20:13:32,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:32,317 INFO L225 Difference]: With dead ends: 1863 [2022-11-18 20:13:32,317 INFO L226 Difference]: Without dead ends: 835 [2022-11-18 20:13:32,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:13:32,324 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 300 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:32,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 47 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 20:13:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-11-18 20:13:32,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 835. [2022-11-18 20:13:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 1.2613908872901678) internal successors, (1052), 834 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1052 transitions. [2022-11-18 20:13:32,353 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1052 transitions. Word has length 215 [2022-11-18 20:13:32,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:32,354 INFO L495 AbstractCegarLoop]: Abstraction has 835 states and 1052 transitions. [2022-11-18 20:13:32,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:32,354 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1052 transitions. [2022-11-18 20:13:32,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-18 20:13:32,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:32,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:13:32,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:13:32,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:13:32,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:32,361 INFO L85 PathProgramCache]: Analyzing trace with hash -762822200, now seen corresponding path program 1 times [2022-11-18 20:13:32,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:32,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564747243] [2022-11-18 20:13:32,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:32,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:33,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:33,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564747243] [2022-11-18 20:13:33,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564747243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:33,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:13:33,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:13:33,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951188665] [2022-11-18 20:13:33,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:33,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:33,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:33,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:33,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:33,033 INFO L87 Difference]: Start difference. First operand 835 states and 1052 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:34,012 INFO L93 Difference]: Finished difference Result 2086 states and 2701 transitions. [2022-11-18 20:13:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:34,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 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 228 [2022-11-18 20:13:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:34,018 INFO L225 Difference]: With dead ends: 2086 [2022-11-18 20:13:34,019 INFO L226 Difference]: Without dead ends: 1659 [2022-11-18 20:13:34,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:34,027 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 206 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:34,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 62 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 20:13:34,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-11-18 20:13:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1653. [2022-11-18 20:13:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 1.2433414043583535) internal successors, (2054), 1652 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2054 transitions. [2022-11-18 20:13:34,072 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2054 transitions. Word has length 228 [2022-11-18 20:13:34,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:34,073 INFO L495 AbstractCegarLoop]: Abstraction has 1653 states and 2054 transitions. [2022-11-18 20:13:34,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2054 transitions. [2022-11-18 20:13:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-11-18 20:13:34,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:34,079 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:13:34,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:13:34,080 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:13:34,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:34,081 INFO L85 PathProgramCache]: Analyzing trace with hash 966647857, now seen corresponding path program 1 times [2022-11-18 20:13:34,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:34,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137838591] [2022-11-18 20:13:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:34,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:34,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:34,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137838591] [2022-11-18 20:13:34,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137838591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:34,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:13:34,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:13:34,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34741741] [2022-11-18 20:13:34,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:34,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:13:34,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:13:34,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:13:34,929 INFO L87 Difference]: Start difference. First operand 1653 states and 2054 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:36,768 INFO L93 Difference]: Finished difference Result 3487 states and 4479 transitions. [2022-11-18 20:13:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:13:36,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 231 [2022-11-18 20:13:36,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:36,779 INFO L225 Difference]: With dead ends: 3487 [2022-11-18 20:13:36,779 INFO L226 Difference]: Without dead ends: 2474 [2022-11-18 20:13:36,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:13:36,782 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 196 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:36,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 141 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-18 20:13:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2022-11-18 20:13:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2473. [2022-11-18 20:13:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 1.2317961165048543) internal successors, (3045), 2472 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 3045 transitions. [2022-11-18 20:13:36,846 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 3045 transitions. Word has length 231 [2022-11-18 20:13:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:36,849 INFO L495 AbstractCegarLoop]: Abstraction has 2473 states and 3045 transitions. [2022-11-18 20:13:36,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 3045 transitions. [2022-11-18 20:13:36,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-11-18 20:13:36,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:36,862 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:13:36,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:13:36,864 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:13:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:36,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2072872742, now seen corresponding path program 1 times [2022-11-18 20:13:36,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:36,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938155816] [2022-11-18 20:13:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:36,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:37,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:37,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938155816] [2022-11-18 20:13:37,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938155816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:37,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579840259] [2022-11-18 20:13:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:37,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:37,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:37,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:37,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:13:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:37,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:13:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-18 20:13:38,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:13:38,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579840259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:38,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:13:38,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 20:13:38,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957367001] [2022-11-18 20:13:38,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:38,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:38,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:38,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:38,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:13:38,445 INFO L87 Difference]: Start difference. First operand 2473 states and 3045 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:39,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:39,595 INFO L93 Difference]: Finished difference Result 4749 states and 5885 transitions. [2022-11-18 20:13:39,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:39,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 238 [2022-11-18 20:13:39,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:39,605 INFO L225 Difference]: With dead ends: 4749 [2022-11-18 20:13:39,605 INFO L226 Difference]: Without dead ends: 2278 [2022-11-18 20:13:39,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:13:39,612 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:39,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 289 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 20:13:39,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2022-11-18 20:13:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2270. [2022-11-18 20:13:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 1.2269722344645217) internal successors, (2784), 2269 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:39,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 2784 transitions. [2022-11-18 20:13:39,670 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 2784 transitions. Word has length 238 [2022-11-18 20:13:39,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:39,671 INFO L495 AbstractCegarLoop]: Abstraction has 2270 states and 2784 transitions. [2022-11-18 20:13:39,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:39,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 2784 transitions. [2022-11-18 20:13:39,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-11-18 20:13:39,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:39,679 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:13:39,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:39,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:13:39,886 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:13:39,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:39,887 INFO L85 PathProgramCache]: Analyzing trace with hash -398536270, now seen corresponding path program 1 times [2022-11-18 20:13:39,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:39,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277570198] [2022-11-18 20:13:39,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:39,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:13:40,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:40,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277570198] [2022-11-18 20:13:40,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277570198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:40,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364548994] [2022-11-18 20:13:40,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:40,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:40,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:40,520 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:40,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:13:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:40,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:13:40,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:13:40,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:13:40,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364548994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:40,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:13:40,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 20:13:40,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149874573] [2022-11-18 20:13:40,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:40,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:40,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:40,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:40,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:13:40,828 INFO L87 Difference]: Start difference. First operand 2270 states and 2784 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:41,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:41,846 INFO L93 Difference]: Finished difference Result 4744 states and 6133 transitions. [2022-11-18 20:13:41,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:41,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 244 [2022-11-18 20:13:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:41,859 INFO L225 Difference]: With dead ends: 4744 [2022-11-18 20:13:41,860 INFO L226 Difference]: Without dead ends: 3491 [2022-11-18 20:13:41,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:13:41,863 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 215 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:41,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 335 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 20:13:41,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2022-11-18 20:13:41,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 3488. [2022-11-18 20:13:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3488 states, 3487 states have (on average 1.1783768282190996) internal successors, (4109), 3487 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3488 states to 3488 states and 4109 transitions. [2022-11-18 20:13:41,941 INFO L78 Accepts]: Start accepts. Automaton has 3488 states and 4109 transitions. Word has length 244 [2022-11-18 20:13:41,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:41,942 INFO L495 AbstractCegarLoop]: Abstraction has 3488 states and 4109 transitions. [2022-11-18 20:13:41,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:41,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3488 states and 4109 transitions. [2022-11-18 20:13:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-18 20:13:41,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:41,950 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:13:41,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:42,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:42,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:13:42,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2057533952, now seen corresponding path program 1 times [2022-11-18 20:13:42,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:42,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749894283] [2022-11-18 20:13:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:42,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:13:42,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:42,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749894283] [2022-11-18 20:13:42,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749894283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:42,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550428720] [2022-11-18 20:13:42,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:42,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:42,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:42,771 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:42,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:13:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:43,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:13:43,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 20:13:43,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:13:43,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550428720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:43,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:13:43,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 20:13:43,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115745849] [2022-11-18 20:13:43,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:43,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:43,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:43,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:43,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:13:43,444 INFO L87 Difference]: Start difference. First operand 3488 states and 4109 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:44,581 INFO L93 Difference]: Finished difference Result 9221 states and 10936 transitions. [2022-11-18 20:13:44,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:44,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 248 [2022-11-18 20:13:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:44,614 INFO L225 Difference]: With dead ends: 9221 [2022-11-18 20:13:44,614 INFO L226 Difference]: Without dead ends: 6750 [2022-11-18 20:13:44,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:13:44,622 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 42 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:44,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 137 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 20:13:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6750 states. [2022-11-18 20:13:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6750 to 6747. [2022-11-18 20:13:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6747 states, 6746 states have (on average 1.1483842276904832) internal successors, (7747), 6746 states have internal predecessors, (7747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6747 states to 6747 states and 7747 transitions. [2022-11-18 20:13:44,816 INFO L78 Accepts]: Start accepts. Automaton has 6747 states and 7747 transitions. Word has length 248 [2022-11-18 20:13:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:44,817 INFO L495 AbstractCegarLoop]: Abstraction has 6747 states and 7747 transitions. [2022-11-18 20:13:44,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 6747 states and 7747 transitions. [2022-11-18 20:13:44,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-11-18 20:13:44,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:44,838 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 20:13:44,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:45,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:13:45,051 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:13:45,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:45,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1223070575, now seen corresponding path program 1 times [2022-11-18 20:13:45,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:45,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451295590] [2022-11-18 20:13:45,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:45,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:45,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:45,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451295590] [2022-11-18 20:13:45,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451295590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:45,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:13:45,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:13:45,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808313611] [2022-11-18 20:13:45,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:45,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:45,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:45,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:45,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:45,616 INFO L87 Difference]: Start difference. First operand 6747 states and 7747 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:46,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:46,778 INFO L93 Difference]: Finished difference Result 17180 states and 19978 transitions. [2022-11-18 20:13:46,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:46,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 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 251 [2022-11-18 20:13:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:46,830 INFO L225 Difference]: With dead ends: 17180 [2022-11-18 20:13:46,830 INFO L226 Difference]: Without dead ends: 12465 [2022-11-18 20:13:46,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:46,841 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 206 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:46,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 84 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 20:13:46,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12465 states. [2022-11-18 20:13:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12465 to 12460. [2022-11-18 20:13:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12460 states, 12459 states have (on average 1.15177783128662) internal successors, (14350), 12459 states have internal predecessors, (14350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12460 states to 12460 states and 14350 transitions. [2022-11-18 20:13:47,138 INFO L78 Accepts]: Start accepts. Automaton has 12460 states and 14350 transitions. Word has length 251 [2022-11-18 20:13:47,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:47,138 INFO L495 AbstractCegarLoop]: Abstraction has 12460 states and 14350 transitions. [2022-11-18 20:13:47,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:47,140 INFO L276 IsEmpty]: Start isEmpty. Operand 12460 states and 14350 transitions. [2022-11-18 20:13:47,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-11-18 20:13:47,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:47,162 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 20:13:47,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 20:13:47,162 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:13:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:47,163 INFO L85 PathProgramCache]: Analyzing trace with hash 3857663, now seen corresponding path program 1 times [2022-11-18 20:13:47,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:47,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194295517] [2022-11-18 20:13:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:47,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:13:47,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:47,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194295517] [2022-11-18 20:13:47,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194295517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:47,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:13:47,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:13:47,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075048438] [2022-11-18 20:13:47,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:47,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:47,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:47,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:47,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:47,711 INFO L87 Difference]: Start difference. First operand 12460 states and 14350 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:48,814 INFO L93 Difference]: Finished difference Result 32260 states and 37087 transitions. [2022-11-18 20:13:48,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:48,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 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 262 [2022-11-18 20:13:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:48,977 INFO L225 Difference]: With dead ends: 32260 [2022-11-18 20:13:48,977 INFO L226 Difference]: Without dead ends: 20411 [2022-11-18 20:13:48,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:48,994 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 217 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:48,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 138 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 20:13:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20411 states. [2022-11-18 20:13:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20411 to 20405. [2022-11-18 20:13:49,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20405 states, 20404 states have (on average 1.1399235444030582) internal successors, (23259), 20404 states have internal predecessors, (23259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20405 states to 20405 states and 23259 transitions. [2022-11-18 20:13:49,437 INFO L78 Accepts]: Start accepts. Automaton has 20405 states and 23259 transitions. Word has length 262 [2022-11-18 20:13:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:49,437 INFO L495 AbstractCegarLoop]: Abstraction has 20405 states and 23259 transitions. [2022-11-18 20:13:49,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 20405 states and 23259 transitions. [2022-11-18 20:13:49,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-11-18 20:13:49,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:49,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 20:13:49,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:13:49,468 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:13:49,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:49,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1098227865, now seen corresponding path program 1 times [2022-11-18 20:13:49,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:49,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792849690] [2022-11-18 20:13:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:49,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:49,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:49,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792849690] [2022-11-18 20:13:49,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792849690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:13:49,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:13:49,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:13:49,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369744275] [2022-11-18 20:13:49,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:13:49,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:13:49,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:49,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:13:49,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:49,966 INFO L87 Difference]: Start difference. First operand 20405 states and 23259 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) [2022-11-18 20:13:51,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:51,142 INFO L93 Difference]: Finished difference Result 36768 states and 42760 transitions. [2022-11-18 20:13:51,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:13:51,143 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 275 [2022-11-18 20:13:51,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:51,204 INFO L225 Difference]: With dead ends: 36768 [2022-11-18 20:13:51,205 INFO L226 Difference]: Without dead ends: 27355 [2022-11-18 20:13:51,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:13:51,223 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 157 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:51,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 158 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 20:13:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27355 states. [2022-11-18 20:13:51,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27355 to 25299. [2022-11-18 20:13:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25299 states, 25298 states have (on average 1.1620681476796584) internal successors, (29398), 25298 states have internal predecessors, (29398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25299 states to 25299 states and 29398 transitions. [2022-11-18 20:13:51,835 INFO L78 Accepts]: Start accepts. Automaton has 25299 states and 29398 transitions. Word has length 275 [2022-11-18 20:13:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:51,836 INFO L495 AbstractCegarLoop]: Abstraction has 25299 states and 29398 transitions. [2022-11-18 20:13:51,836 INFO L496 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) [2022-11-18 20:13:51,836 INFO L276 IsEmpty]: Start isEmpty. Operand 25299 states and 29398 transitions. [2022-11-18 20:13:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-11-18 20:13:51,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:51,868 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:13:51,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 20:13:51,868 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:13:51,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:51,869 INFO L85 PathProgramCache]: Analyzing trace with hash -954979738, now seen corresponding path program 1 times [2022-11-18 20:13:51,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:51,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573381565] [2022-11-18 20:13:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:51,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 87 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-18 20:13:52,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:52,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573381565] [2022-11-18 20:13:52,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573381565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:52,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420853440] [2022-11-18 20:13:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:52,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:52,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:52,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:52,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:13:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:52,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:13:52,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 87 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:13:53,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:13:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 87 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:13:53,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420853440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:13:53,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:13:53,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2022-11-18 20:13:53,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099499521] [2022-11-18 20:13:53,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:13:53,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:13:53,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:53,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:13:53,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:13:53,844 INFO L87 Difference]: Start difference. First operand 25299 states and 29398 transitions. Second operand has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:59,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:59,472 INFO L93 Difference]: Finished difference Result 110694 states and 131510 transitions. [2022-11-18 20:13:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:13:59,473 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 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 276 [2022-11-18 20:13:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:59,652 INFO L225 Difference]: With dead ends: 110694 [2022-11-18 20:13:59,652 INFO L226 Difference]: Without dead ends: 88646 [2022-11-18 20:13:59,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:13:59,675 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 2337 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 3622 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2337 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 4116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 3622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:59,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2337 Valid, 435 Invalid, 4116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 3622 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-18 20:13:59,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88646 states. [2022-11-18 20:14:01,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88646 to 86172. [2022-11-18 20:14:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86172 states, 86171 states have (on average 1.1491453041046291) internal successors, (99023), 86171 states have internal predecessors, (99023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86172 states to 86172 states and 99023 transitions. [2022-11-18 20:14:01,367 INFO L78 Accepts]: Start accepts. Automaton has 86172 states and 99023 transitions. Word has length 276 [2022-11-18 20:14:01,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:14:01,367 INFO L495 AbstractCegarLoop]: Abstraction has 86172 states and 99023 transitions. [2022-11-18 20:14:01,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:01,368 INFO L276 IsEmpty]: Start isEmpty. Operand 86172 states and 99023 transitions. [2022-11-18 20:14:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-11-18 20:14:01,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:14:01,451 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:14:01,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:14:01,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:14:01,660 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:14:01,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:14:01,660 INFO L85 PathProgramCache]: Analyzing trace with hash -177324733, now seen corresponding path program 1 times [2022-11-18 20:14:01,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:14:01,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189771269] [2022-11-18 20:14:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:01,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:14:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:14:02,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:14:02,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189771269] [2022-11-18 20:14:02,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189771269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:14:02,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:14:02,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:14:02,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995372066] [2022-11-18 20:14:02,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:14:02,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:14:02,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:14:02,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:14:02,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:14:02,585 INFO L87 Difference]: Start difference. First operand 86172 states and 99023 transitions. Second operand has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:14:04,913 INFO L93 Difference]: Finished difference Result 183754 states and 210697 transitions. [2022-11-18 20:14:04,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:14:04,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 302 [2022-11-18 20:14:04,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:14:05,413 INFO L225 Difference]: With dead ends: 183754 [2022-11-18 20:14:05,413 INFO L226 Difference]: Without dead ends: 106953 [2022-11-18 20:14:05,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:14:05,521 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 367 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:14:05,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 90 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-18 20:14:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106953 states. [2022-11-18 20:14:07,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106953 to 106096. [2022-11-18 20:14:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106096 states, 106095 states have (on average 1.132287101182902) internal successors, (120130), 106095 states have internal predecessors, (120130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:07,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106096 states to 106096 states and 120130 transitions. [2022-11-18 20:14:07,846 INFO L78 Accepts]: Start accepts. Automaton has 106096 states and 120130 transitions. Word has length 302 [2022-11-18 20:14:07,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:14:07,847 INFO L495 AbstractCegarLoop]: Abstraction has 106096 states and 120130 transitions. [2022-11-18 20:14:07,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.5) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:07,848 INFO L276 IsEmpty]: Start isEmpty. Operand 106096 states and 120130 transitions. [2022-11-18 20:14:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-11-18 20:14:07,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:14:07,975 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:14:07,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 20:14:07,975 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:14:07,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:14:07,976 INFO L85 PathProgramCache]: Analyzing trace with hash 104267680, now seen corresponding path program 1 times [2022-11-18 20:14:07,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:14:07,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618839649] [2022-11-18 20:14:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:07,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:14:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:14:08,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:14:08,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618839649] [2022-11-18 20:14:08,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618839649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:14:08,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:14:08,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:14:08,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40208099] [2022-11-18 20:14:08,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:14:08,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:14:08,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:14:08,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:14:08,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:14:08,760 INFO L87 Difference]: Start difference. First operand 106096 states and 120130 transitions. Second operand has 4 states, 4 states have (on average 78.5) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:14:11,116 INFO L93 Difference]: Finished difference Result 258430 states and 294134 transitions. [2022-11-18 20:14:11,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:14:11,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.5) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 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 314 [2022-11-18 20:14:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:14:11,367 INFO L225 Difference]: With dead ends: 258430 [2022-11-18 20:14:11,367 INFO L226 Difference]: Without dead ends: 163532 [2022-11-18 20:14:11,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:14:11,439 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 412 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:14:11,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 462 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 20:14:11,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163532 states. [2022-11-18 20:14:14,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163532 to 159668. [2022-11-18 20:14:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159668 states, 159667 states have (on average 1.1273400264300075) internal successors, (179999), 159667 states have internal predecessors, (179999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159668 states to 159668 states and 179999 transitions. [2022-11-18 20:14:14,515 INFO L78 Accepts]: Start accepts. Automaton has 159668 states and 179999 transitions. Word has length 314 [2022-11-18 20:14:14,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:14:14,516 INFO L495 AbstractCegarLoop]: Abstraction has 159668 states and 179999 transitions. [2022-11-18 20:14:14,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.5) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 159668 states and 179999 transitions. [2022-11-18 20:14:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-18 20:14:14,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:14:14,600 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 20:14:14,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 20:14:14,601 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:14:14,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:14:14,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1512807368, now seen corresponding path program 1 times [2022-11-18 20:14:14,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:14:14,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268179927] [2022-11-18 20:14:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:14,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:14:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 125 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:14:16,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:14:16,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268179927] [2022-11-18 20:14:16,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268179927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:14:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539799768] [2022-11-18 20:14:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:16,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:14:16,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:14:16,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:14:16,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:14:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:16,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:14:16,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:14:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-18 20:14:16,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:14:16,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539799768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:14:16,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:14:17,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-18 20:14:17,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822156504] [2022-11-18 20:14:17,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:14:17,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:14:17,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:14:17,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:14:17,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:14:17,003 INFO L87 Difference]: Start difference. First operand 159668 states and 179999 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:19,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:14:19,222 INFO L93 Difference]: Finished difference Result 352802 states and 400465 transitions. [2022-11-18 20:14:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:14:19,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 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 326 [2022-11-18 20:14:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:14:19,524 INFO L225 Difference]: With dead ends: 352802 [2022-11-18 20:14:19,525 INFO L226 Difference]: Without dead ends: 207580 [2022-11-18 20:14:19,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:14:19,621 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:14:19,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 90 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:14:20,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207580 states. [2022-11-18 20:14:22,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207580 to 186474. [2022-11-18 20:14:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186474 states, 186473 states have (on average 1.1294771897271991) internal successors, (210617), 186473 states have internal predecessors, (210617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:23,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186474 states to 186474 states and 210617 transitions. [2022-11-18 20:14:23,494 INFO L78 Accepts]: Start accepts. Automaton has 186474 states and 210617 transitions. Word has length 326 [2022-11-18 20:14:23,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:14:23,494 INFO L495 AbstractCegarLoop]: Abstraction has 186474 states and 210617 transitions. [2022-11-18 20:14:23,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:23,495 INFO L276 IsEmpty]: Start isEmpty. Operand 186474 states and 210617 transitions. [2022-11-18 20:14:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-11-18 20:14:23,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:14:23,586 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 20:14:23,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:14:23,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:14:23,794 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:14:23,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:14:23,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1420806845, now seen corresponding path program 1 times [2022-11-18 20:14:23,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:14:23,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616881012] [2022-11-18 20:14:23,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:23,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:14:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 145 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:14:25,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:14:25,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616881012] [2022-11-18 20:14:25,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616881012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:14:25,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943758177] [2022-11-18 20:14:25,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:25,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:14:25,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:14:25,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:14:25,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:14:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:25,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:14:25,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:14:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:14:25,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:14:25,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943758177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:14:25,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:14:25,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 20:14:25,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38028001] [2022-11-18 20:14:25,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:14:25,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:14:25,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:14:25,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:14:25,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:14:25,469 INFO L87 Difference]: Start difference. First operand 186474 states and 210617 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:27,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:14:27,892 INFO L93 Difference]: Finished difference Result 414376 states and 473373 transitions. [2022-11-18 20:14:27,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:14:27,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 339 [2022-11-18 20:14:27,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:14:28,220 INFO L225 Difference]: With dead ends: 414376 [2022-11-18 20:14:28,220 INFO L226 Difference]: Without dead ends: 233386 [2022-11-18 20:14:28,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:14:28,303 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 229 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:14:28,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 279 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:14:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233386 states. [2022-11-18 20:14:32,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233386 to 232949. [2022-11-18 20:14:32,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232949 states, 232948 states have (on average 1.1454487696825042) internal successors, (266830), 232948 states have internal predecessors, (266830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232949 states to 232949 states and 266830 transitions. [2022-11-18 20:14:33,766 INFO L78 Accepts]: Start accepts. Automaton has 232949 states and 266830 transitions. Word has length 339 [2022-11-18 20:14:33,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:14:33,769 INFO L495 AbstractCegarLoop]: Abstraction has 232949 states and 266830 transitions. [2022-11-18 20:14:33,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:33,770 INFO L276 IsEmpty]: Start isEmpty. Operand 232949 states and 266830 transitions. [2022-11-18 20:14:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-11-18 20:14:33,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:14:33,949 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 20:14:33,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:14:34,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:14:34,159 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:14:34,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:14:34,160 INFO L85 PathProgramCache]: Analyzing trace with hash -743831960, now seen corresponding path program 1 times [2022-11-18 20:14:34,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:14:34,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241457092] [2022-11-18 20:14:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:34,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:14:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:14:34,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:14:34,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241457092] [2022-11-18 20:14:34,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241457092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:14:34,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:14:34,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:14:34,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782295905] [2022-11-18 20:14:34,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:14:34,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:14:34,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:14:34,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:14:34,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:14:34,530 INFO L87 Difference]: Start difference. First operand 232949 states and 266830 transitions. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:14:37,669 INFO L93 Difference]: Finished difference Result 468574 states and 537172 transitions. [2022-11-18 20:14:37,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:14:37,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 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 350 [2022-11-18 20:14:37,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:14:38,014 INFO L225 Difference]: With dead ends: 468574 [2022-11-18 20:14:38,014 INFO L226 Difference]: Without dead ends: 241312 [2022-11-18 20:14:38,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:14:38,108 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 385 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:14:38,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 447 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 20:14:38,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241312 states. [2022-11-18 20:14:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241312 to 235590. [2022-11-18 20:14:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235590 states, 235589 states have (on average 1.142048228058186) internal successors, (269054), 235589 states have internal predecessors, (269054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235590 states to 235590 states and 269054 transitions. [2022-11-18 20:14:43,694 INFO L78 Accepts]: Start accepts. Automaton has 235590 states and 269054 transitions. Word has length 350 [2022-11-18 20:14:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:14:43,694 INFO L495 AbstractCegarLoop]: Abstraction has 235590 states and 269054 transitions. [2022-11-18 20:14:43,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:14:43,695 INFO L276 IsEmpty]: Start isEmpty. Operand 235590 states and 269054 transitions. [2022-11-18 20:14:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-11-18 20:14:43,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:14:43,832 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:14:43,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 20:14:43,833 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:14:43,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:14:43,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1277503104, now seen corresponding path program 1 times [2022-11-18 20:14:43,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:14:43,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442349862] [2022-11-18 20:14:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:43,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:14:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 157 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:14:44,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:14:44,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442349862] [2022-11-18 20:14:44,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442349862] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:14:44,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718457303] [2022-11-18 20:14:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:44,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:14:44,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:14:44,433 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:14:44,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e442e15d-09fe-4161-bf13-fd77ad762989/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:14:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:44,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:14:44,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:14:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 20:14:44,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:14:44,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718457303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:14:44,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:14:44,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-18 20:14:44,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063571062] [2022-11-18 20:14:44,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:14:44,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:14:44,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:14:44,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:14:44,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:14:44,941 INFO L87 Difference]: Start difference. First operand 235590 states and 269054 transitions. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 2 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)