./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label18.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label18.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8 --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 d08db41ae0d7ec8078cc06035e9e84ddb6f4cbeccb0dd0eb818a13f85c4c66c1 --- 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-e04fb08 [2022-11-16 12:49:22,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:49:22,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:49:22,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:49:22,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:49:22,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:49:22,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:49:22,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:49:22,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:49:22,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:49:22,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:49:22,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:49:22,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:49:22,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:49:22,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:49:22,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:49:22,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:49:22,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:49:22,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:49:22,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:49:22,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:49:22,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:49:22,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:49:22,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:49:22,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:49:22,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:49:22,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:49:22,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:49:22,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:49:22,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:49:22,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:49:22,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:49:22,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:49:22,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:49:22,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:49:22,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:49:22,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:49:22,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:49:22,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:49:22,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:49:22,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:49:22,461 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:49:22,510 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:49:22,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:49:22,512 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:49:22,512 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:49:22,513 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:49:22,513 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:49:22,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:49:22,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:49:22,515 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:49:22,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:49:22,516 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:49:22,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:49:22,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:49:22,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:49:22,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:49:22,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:49:22,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:49:22,518 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:49:22,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:49:22,518 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:49:22,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:49:22,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:49:22,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:49:22,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:49:22,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:49:22,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:49:22,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:49:22,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:49:22,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:49:22,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:49:22,523 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:49:22,523 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:49:22,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:49:22,523 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_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d08db41ae0d7ec8078cc06035e9e84ddb6f4cbeccb0dd0eb818a13f85c4c66c1 [2022-11-16 12:49:22,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:49:22,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:49:22,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:49:22,862 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:49:22,864 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:49:22,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/eca-rers2012/Problem03_label18.c [2022-11-16 12:49:22,949 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/data/1a9c75aff/262a94b8e2924428b55677e06514d692/FLAG03ac958ae [2022-11-16 12:49:23,638 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:49:23,639 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/sv-benchmarks/c/eca-rers2012/Problem03_label18.c [2022-11-16 12:49:23,654 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/data/1a9c75aff/262a94b8e2924428b55677e06514d692/FLAG03ac958ae [2022-11-16 12:49:23,806 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/data/1a9c75aff/262a94b8e2924428b55677e06514d692 [2022-11-16 12:49:23,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:49:23,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:49:23,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:49:23,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:49:23,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:49:23,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:49:23" (1/1) ... [2022-11-16 12:49:23,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4938e226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:49:23, skipping insertion in model container [2022-11-16 12:49:23,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:49:23" (1/1) ... [2022-11-16 12:49:23,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:49:23,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:49:24,640 WARN L229 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_00a0a001-c844-463b-82ed-6a195b9a6172/sv-benchmarks/c/eca-rers2012/Problem03_label18.c[61636,61649] [2022-11-16 12:49:24,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:49:24,671 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:49:24,926 WARN L229 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_00a0a001-c844-463b-82ed-6a195b9a6172/sv-benchmarks/c/eca-rers2012/Problem03_label18.c[61636,61649] [2022-11-16 12:49:24,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:49:24,952 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:49:24,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:49:24 WrapperNode [2022-11-16 12:49:24,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:49:24,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:49:24,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:49:24,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:49:24,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:49:24" (1/1) ... [2022-11-16 12:49:25,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:49:24" (1/1) ... [2022-11-16 12:49:25,107 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-16 12:49:25,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:49:25,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:49:25,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:49:25,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:49:25,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:49:24" (1/1) ... [2022-11-16 12:49:25,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:49:24" (1/1) ... [2022-11-16 12:49:25,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:49:24" (1/1) ... [2022-11-16 12:49:25,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:49:24" (1/1) ... [2022-11-16 12:49:25,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:49:24" (1/1) ... [2022-11-16 12:49:25,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:49:24" (1/1) ... [2022-11-16 12:49:25,218 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:49:24" (1/1) ... [2022-11-16 12:49:25,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:49:24" (1/1) ... [2022-11-16 12:49:25,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:49:25,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:49:25,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:49:25,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:49:25,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:49:24" (1/1) ... [2022-11-16 12:49:25,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:49:25,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:25,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:49:25,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:49:25,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:49:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:49:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:49:25,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:49:25,405 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:49:25,407 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:49:27,534 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:49:27,546 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:49:27,546 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 12:49:27,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:49:27 BoogieIcfgContainer [2022-11-16 12:49:27,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:49:27,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:49:27,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:49:27,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:49:27,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:49:23" (1/3) ... [2022-11-16 12:49:27,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ede764f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:49:27, skipping insertion in model container [2022-11-16 12:49:27,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:49:24" (2/3) ... [2022-11-16 12:49:27,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ede764f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:49:27, skipping insertion in model container [2022-11-16 12:49:27,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:49:27" (3/3) ... [2022-11-16 12:49:27,559 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label18.c [2022-11-16 12:49:27,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:49:27,580 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:49:27,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:49:27,670 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;@509c5bfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:49:27,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:49:27,676 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) [2022-11-16 12:49:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-16 12:49:27,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:27,694 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, 1, 1, 1] [2022-11-16 12:49:27,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2057722499, now seen corresponding path program 1 times [2022-11-16 12:49:27,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:27,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388109817] [2022-11-16 12:49:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:27,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:28,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:28,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388109817] [2022-11-16 12:49:28,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388109817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:28,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:28,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:49:28,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070982988] [2022-11-16 12:49:28,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:28,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:28,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:28,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:28,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:28,986 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 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) [2022-11-16 12:49:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:30,457 INFO L93 Difference]: Finished difference Result 824 states and 1460 transitions. [2022-11-16 12:49:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:30,460 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 203 [2022-11-16 12:49:30,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:30,481 INFO L225 Difference]: With dead ends: 824 [2022-11-16 12:49:30,481 INFO L226 Difference]: Without dead ends: 444 [2022-11-16 12:49:30,488 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 [2022-11-16 12:49:30,493 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 27 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:30,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 238 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 12:49:30,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-11-16 12:49:30,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 443. [2022-11-16 12:49:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.418552036199095) internal successors, (627), 442 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:30,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 627 transitions. [2022-11-16 12:49:30,589 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 627 transitions. Word has length 203 [2022-11-16 12:49:30,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:30,596 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 627 transitions. [2022-11-16 12:49:30,597 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) [2022-11-16 12:49:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 627 transitions. [2022-11-16 12:49:30,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-11-16 12:49:30,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:30,610 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, 1, 1, 1] [2022-11-16 12:49:30,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:49:30,611 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:30,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:30,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1790864508, now seen corresponding path program 1 times [2022-11-16 12:49:30,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:30,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877206149] [2022-11-16 12:49:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:30,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:30,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:30,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877206149] [2022-11-16 12:49:30,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877206149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:30,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:30,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:49:30,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497351593] [2022-11-16 12:49:30,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:30,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:30,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:30,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:30,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:30,960 INFO L87 Difference]: Start difference. First operand 443 states and 627 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:32,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:32,068 INFO L93 Difference]: Finished difference Result 1310 states and 1861 transitions. [2022-11-16 12:49:32,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:32,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 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 211 [2022-11-16 12:49:32,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:32,080 INFO L225 Difference]: With dead ends: 1310 [2022-11-16 12:49:32,081 INFO L226 Difference]: Without dead ends: 869 [2022-11-16 12:49:32,082 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 [2022-11-16 12:49:32,084 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:32,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:49:32,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-16 12:49:32,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 855. [2022-11-16 12:49:32,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 1.3875878220140516) internal successors, (1185), 854 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1185 transitions. [2022-11-16 12:49:32,118 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1185 transitions. Word has length 211 [2022-11-16 12:49:32,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:32,119 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 1185 transitions. [2022-11-16 12:49:32,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:32,120 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1185 transitions. [2022-11-16 12:49:32,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-16 12:49:32,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:32,124 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:32,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:49:32,124 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:32,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:32,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1030453192, now seen corresponding path program 1 times [2022-11-16 12:49:32,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:32,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146882757] [2022-11-16 12:49:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:32,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:49:32,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:32,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146882757] [2022-11-16 12:49:32,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146882757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:32,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:32,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:49:32,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226712866] [2022-11-16 12:49:32,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:32,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:32,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:32,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:32,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:32,598 INFO L87 Difference]: Start difference. First operand 855 states and 1185 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:33,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:33,724 INFO L93 Difference]: Finished difference Result 2547 states and 3535 transitions. [2022-11-16 12:49:33,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:33,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 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 220 [2022-11-16 12:49:33,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:33,731 INFO L225 Difference]: With dead ends: 2547 [2022-11-16 12:49:33,732 INFO L226 Difference]: Without dead ends: 1694 [2022-11-16 12:49:33,733 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 [2022-11-16 12:49:33,735 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:33,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 227 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 12:49:33,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2022-11-16 12:49:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1687. [2022-11-16 12:49:33,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 1.3724792408066429) internal successors, (2314), 1686 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2314 transitions. [2022-11-16 12:49:33,779 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2314 transitions. Word has length 220 [2022-11-16 12:49:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:33,779 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 2314 transitions. [2022-11-16 12:49:33,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2314 transitions. [2022-11-16 12:49:33,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-11-16 12:49:33,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:33,786 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:33,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:49:33,786 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:33,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:33,787 INFO L85 PathProgramCache]: Analyzing trace with hash 551804157, now seen corresponding path program 1 times [2022-11-16 12:49:33,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:33,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884240916] [2022-11-16 12:49:33,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:33,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:49:34,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:34,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884240916] [2022-11-16 12:49:34,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884240916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:34,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:34,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:49:34,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363354188] [2022-11-16 12:49:34,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:34,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:34,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:34,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:34,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:34,108 INFO L87 Difference]: Start difference. First operand 1687 states and 2314 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:35,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:35,155 INFO L93 Difference]: Finished difference Result 4190 states and 5944 transitions. [2022-11-16 12:49:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:35,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2022-11-16 12:49:35,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:35,165 INFO L225 Difference]: With dead ends: 4190 [2022-11-16 12:49:35,166 INFO L226 Difference]: Without dead ends: 2505 [2022-11-16 12:49:35,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:35,180 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 236 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:35,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 405 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:49:35,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2022-11-16 12:49:35,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2502. [2022-11-16 12:49:35,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 1.3102758896441424) internal successors, (3277), 2501 states have internal predecessors, (3277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 3277 transitions. [2022-11-16 12:49:35,245 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 3277 transitions. Word has length 223 [2022-11-16 12:49:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:35,246 INFO L495 AbstractCegarLoop]: Abstraction has 2502 states and 3277 transitions. [2022-11-16 12:49:35,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:35,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 3277 transitions. [2022-11-16 12:49:35,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-11-16 12:49:35,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:35,253 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2022-11-16 12:49:35,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:49:35,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:35,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2004662289, now seen corresponding path program 1 times [2022-11-16 12:49:35,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:35,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33095513] [2022-11-16 12:49:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:35,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:49:35,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:35,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33095513] [2022-11-16 12:49:35,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33095513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:35,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:35,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:49:35,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716130649] [2022-11-16 12:49:35,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:35,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:35,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:35,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:35,723 INFO L87 Difference]: Start difference. First operand 2502 states and 3277 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:36,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:36,796 INFO L93 Difference]: Finished difference Result 5827 states and 7690 transitions. [2022-11-16 12:49:36,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:36,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2022-11-16 12:49:36,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:36,812 INFO L225 Difference]: With dead ends: 5827 [2022-11-16 12:49:36,813 INFO L226 Difference]: Without dead ends: 3327 [2022-11-16 12:49:36,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:36,824 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:36,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 364 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:49:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2022-11-16 12:49:36,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 3317. [2022-11-16 12:49:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3317 states, 3316 states have (on average 1.2831724969843186) internal successors, (4255), 3316 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 4255 transitions. [2022-11-16 12:49:36,910 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 4255 transitions. Word has length 231 [2022-11-16 12:49:36,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:36,911 INFO L495 AbstractCegarLoop]: Abstraction has 3317 states and 4255 transitions. [2022-11-16 12:49:36,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:36,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 4255 transitions. [2022-11-16 12:49:36,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-11-16 12:49:36,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:36,920 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:36,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:49:36,921 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:36,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:36,921 INFO L85 PathProgramCache]: Analyzing trace with hash 338780757, now seen corresponding path program 1 times [2022-11-16 12:49:36,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:36,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548956593] [2022-11-16 12:49:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:36,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:49:37,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:37,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548956593] [2022-11-16 12:49:37,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548956593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:37,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:37,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:49:37,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119755262] [2022-11-16 12:49:37,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:37,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:37,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:37,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:37,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:37,358 INFO L87 Difference]: Start difference. First operand 3317 states and 4255 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:38,502 INFO L93 Difference]: Finished difference Result 9081 states and 11775 transitions. [2022-11-16 12:49:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:38,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 [2022-11-16 12:49:38,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:38,525 INFO L225 Difference]: With dead ends: 9081 [2022-11-16 12:49:38,525 INFO L226 Difference]: Without dead ends: 5766 [2022-11-16 12:49:38,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:38,531 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 202 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:38,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 386 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:49:38,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5766 states. [2022-11-16 12:49:38,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5766 to 5760. [2022-11-16 12:49:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5760 states, 5759 states have (on average 1.2401458586560166) internal successors, (7142), 5759 states have internal predecessors, (7142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5760 states to 5760 states and 7142 transitions. [2022-11-16 12:49:38,688 INFO L78 Accepts]: Start accepts. Automaton has 5760 states and 7142 transitions. Word has length 238 [2022-11-16 12:49:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:38,689 INFO L495 AbstractCegarLoop]: Abstraction has 5760 states and 7142 transitions. [2022-11-16 12:49:38,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 5760 states and 7142 transitions. [2022-11-16 12:49:38,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-16 12:49:38,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:38,706 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:49:38,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:49:38,707 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:38,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1822248298, now seen corresponding path program 1 times [2022-11-16 12:49:38,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:38,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797237580] [2022-11-16 12:49:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:38,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:39,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:39,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797237580] [2022-11-16 12:49:39,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797237580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:39,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:39,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:49:39,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543421521] [2022-11-16 12:49:39,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:39,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:49:39,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:39,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:49:39,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:49:39,203 INFO L87 Difference]: Start difference. First operand 5760 states and 7142 transitions. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:40,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:40,823 INFO L93 Difference]: Finished difference Result 11544 states and 14334 transitions. [2022-11-16 12:49:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:49:40,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 247 [2022-11-16 12:49:40,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:40,843 INFO L225 Difference]: With dead ends: 11544 [2022-11-16 12:49:40,843 INFO L226 Difference]: Without dead ends: 5786 [2022-11-16 12:49:40,849 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 [2022-11-16 12:49:40,850 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 407 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:40,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 199 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 12:49:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2022-11-16 12:49:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 4948. [2022-11-16 12:49:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4948 states, 4947 states have (on average 1.2460076814230847) internal successors, (6164), 4947 states have internal predecessors, (6164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4948 states to 4948 states and 6164 transitions. [2022-11-16 12:49:40,964 INFO L78 Accepts]: Start accepts. Automaton has 4948 states and 6164 transitions. Word has length 247 [2022-11-16 12:49:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:40,965 INFO L495 AbstractCegarLoop]: Abstraction has 4948 states and 6164 transitions. [2022-11-16 12:49:40,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4948 states and 6164 transitions. [2022-11-16 12:49:40,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-11-16 12:49:40,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:40,976 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:40,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:49:40,977 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:40,977 INFO L85 PathProgramCache]: Analyzing trace with hash -698467143, now seen corresponding path program 1 times [2022-11-16 12:49:40,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:40,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408899157] [2022-11-16 12:49:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:40,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:49:41,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:41,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408899157] [2022-11-16 12:49:41,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408899157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:41,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:41,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:49:41,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2839281] [2022-11-16 12:49:41,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:41,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:41,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:41,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:41,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:41,508 INFO L87 Difference]: Start difference. First operand 4948 states and 6164 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 2 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) [2022-11-16 12:49:42,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:42,700 INFO L93 Difference]: Finished difference Result 14393 states and 17935 transitions. [2022-11-16 12:49:42,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:42,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 2 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 251 [2022-11-16 12:49:42,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:42,730 INFO L225 Difference]: With dead ends: 14393 [2022-11-16 12:49:42,730 INFO L226 Difference]: Without dead ends: 9447 [2022-11-16 12:49:42,736 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 [2022-11-16 12:49:42,737 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 218 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:42,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 196 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 12:49:42,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9447 states. [2022-11-16 12:49:42,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9447 to 9436. [2022-11-16 12:49:42,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9436 states, 9435 states have (on average 1.2218335983041866) internal successors, (11528), 9435 states have internal predecessors, (11528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9436 states to 9436 states and 11528 transitions. [2022-11-16 12:49:42,914 INFO L78 Accepts]: Start accepts. Automaton has 9436 states and 11528 transitions. Word has length 251 [2022-11-16 12:49:42,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:42,915 INFO L495 AbstractCegarLoop]: Abstraction has 9436 states and 11528 transitions. [2022-11-16 12:49:42,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 2 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) [2022-11-16 12:49:42,915 INFO L276 IsEmpty]: Start isEmpty. Operand 9436 states and 11528 transitions. [2022-11-16 12:49:42,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-11-16 12:49:42,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:42,932 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:42,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:49:42,935 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1876414347, now seen corresponding path program 1 times [2022-11-16 12:49:42,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:42,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768270920] [2022-11-16 12:49:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:42,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:49:43,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:43,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768270920] [2022-11-16 12:49:43,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768270920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:43,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226049608] [2022-11-16 12:49:43,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:43,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:43,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:43,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:43,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:49:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:43,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:49:43,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:49:44,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:49:44,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226049608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:44,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:49:44,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-16 12:49:44,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264537960] [2022-11-16 12:49:44,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:44,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:44,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:44,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:44,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:49:44,224 INFO L87 Difference]: Start difference. First operand 9436 states and 11528 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:45,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:45,450 INFO L93 Difference]: Finished difference Result 25189 states and 30911 transitions. [2022-11-16 12:49:45,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:45,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2022-11-16 12:49:45,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:45,486 INFO L225 Difference]: With dead ends: 25189 [2022-11-16 12:49:45,487 INFO L226 Difference]: Without dead ends: 16161 [2022-11-16 12:49:45,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:49:45,496 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 53 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:45,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 175 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 12:49:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16161 states. [2022-11-16 12:49:45,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16161 to 15344. [2022-11-16 12:49:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15344 states, 15343 states have (on average 1.2000260705207586) internal successors, (18412), 15343 states have internal predecessors, (18412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15344 states to 15344 states and 18412 transitions. [2022-11-16 12:49:45,805 INFO L78 Accepts]: Start accepts. Automaton has 15344 states and 18412 transitions. Word has length 254 [2022-11-16 12:49:45,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:45,807 INFO L495 AbstractCegarLoop]: Abstraction has 15344 states and 18412 transitions. [2022-11-16 12:49:45,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:45,808 INFO L276 IsEmpty]: Start isEmpty. Operand 15344 states and 18412 transitions. [2022-11-16 12:49:45,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-11-16 12:49:45,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:45,835 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:45,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:46,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:46,044 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:46,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:46,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1800171721, now seen corresponding path program 1 times [2022-11-16 12:49:46,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:46,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54855867] [2022-11-16 12:49:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:46,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:46,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:46,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54855867] [2022-11-16 12:49:46,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54855867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:46,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:46,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:49:46,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471257942] [2022-11-16 12:49:46,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:46,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:46,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:46,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:46,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:46,846 INFO L87 Difference]: Start difference. First operand 15344 states and 18412 transitions. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 2 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:47,943 INFO L93 Difference]: Finished difference Result 30078 states and 36114 transitions. [2022-11-16 12:49:47,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:47,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 2 states have internal predecessors, (277), 0 states have call successors, (0), 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 277 [2022-11-16 12:49:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:47,974 INFO L225 Difference]: With dead ends: 30078 [2022-11-16 12:49:47,974 INFO L226 Difference]: Without dead ends: 15142 [2022-11-16 12:49:47,986 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 [2022-11-16 12:49:47,987 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:47,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 199 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:49:48,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15142 states. [2022-11-16 12:49:48,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15142 to 15141. [2022-11-16 12:49:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15141 states, 15140 states have (on average 1.1957067371202115) internal successors, (18103), 15140 states have internal predecessors, (18103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15141 states to 15141 states and 18103 transitions. [2022-11-16 12:49:48,238 INFO L78 Accepts]: Start accepts. Automaton has 15141 states and 18103 transitions. Word has length 277 [2022-11-16 12:49:48,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:48,239 INFO L495 AbstractCegarLoop]: Abstraction has 15141 states and 18103 transitions. [2022-11-16 12:49:48,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 2 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 15141 states and 18103 transitions. [2022-11-16 12:49:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-11-16 12:49:48,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:48,267 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:48,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:49:48,267 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:48,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:48,268 INFO L85 PathProgramCache]: Analyzing trace with hash 319300504, now seen corresponding path program 1 times [2022-11-16 12:49:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:48,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014548672] [2022-11-16 12:49:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:48,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-16 12:49:48,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:48,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014548672] [2022-11-16 12:49:48,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014548672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:48,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:48,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:49:48,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281360778] [2022-11-16 12:49:48,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:48,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:48,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:48,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:48,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:48,899 INFO L87 Difference]: Start difference. First operand 15141 states and 18103 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 2 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:50,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:50,154 INFO L93 Difference]: Finished difference Result 34999 states and 42358 transitions. [2022-11-16 12:49:50,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:50,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 2 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2022-11-16 12:49:50,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:50,197 INFO L225 Difference]: With dead ends: 34999 [2022-11-16 12:49:50,197 INFO L226 Difference]: Without dead ends: 20469 [2022-11-16 12:49:50,210 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 [2022-11-16 12:49:50,210 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:50,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 244 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 12:49:50,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20469 states. [2022-11-16 12:49:50,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20469 to 20438. [2022-11-16 12:49:50,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20438 states, 20437 states have (on average 1.2137789303713853) internal successors, (24806), 20437 states have internal predecessors, (24806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:50,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20438 states to 20438 states and 24806 transitions. [2022-11-16 12:49:50,639 INFO L78 Accepts]: Start accepts. Automaton has 20438 states and 24806 transitions. Word has length 281 [2022-11-16 12:49:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:50,639 INFO L495 AbstractCegarLoop]: Abstraction has 20438 states and 24806 transitions. [2022-11-16 12:49:50,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 2 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:50,640 INFO L276 IsEmpty]: Start isEmpty. Operand 20438 states and 24806 transitions. [2022-11-16 12:49:50,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-11-16 12:49:50,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:50,678 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:49:50,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:49:50,679 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:50,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:50,679 INFO L85 PathProgramCache]: Analyzing trace with hash -953150870, now seen corresponding path program 1 times [2022-11-16 12:49:50,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:50,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225320468] [2022-11-16 12:49:50,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:50,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-16 12:49:51,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:51,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225320468] [2022-11-16 12:49:51,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225320468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:49:51,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932181675] [2022-11-16 12:49:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:51,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:51,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:49:51,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:49:51,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:49:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:51,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:49:51,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 12:49:51,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:49:51,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932181675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:51,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:49:51,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-16 12:49:51,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551023796] [2022-11-16 12:49:51,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:51,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:51,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:51,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:49:51,629 INFO L87 Difference]: Start difference. First operand 20438 states and 24806 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:52,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:52,266 INFO L93 Difference]: Finished difference Result 38171 states and 46445 transitions. [2022-11-16 12:49:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:52,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 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 284 [2022-11-16 12:49:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:52,292 INFO L225 Difference]: With dead ends: 38171 [2022-11-16 12:49:52,292 INFO L226 Difference]: Without dead ends: 18751 [2022-11-16 12:49:52,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:49:52,308 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 308 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:52,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:49:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18751 states. [2022-11-16 12:49:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18751 to 18751. [2022-11-16 12:49:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18751 states, 18750 states have (on average 1.1911466666666666) internal successors, (22334), 18750 states have internal predecessors, (22334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18751 states to 18751 states and 22334 transitions. [2022-11-16 12:49:52,581 INFO L78 Accepts]: Start accepts. Automaton has 18751 states and 22334 transitions. Word has length 284 [2022-11-16 12:49:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:52,581 INFO L495 AbstractCegarLoop]: Abstraction has 18751 states and 22334 transitions. [2022-11-16 12:49:52,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 18751 states and 22334 transitions. [2022-11-16 12:49:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-11-16 12:49:52,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:52,603 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:52,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:52,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:49:52,815 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:52,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:52,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1171124198, now seen corresponding path program 1 times [2022-11-16 12:49:52,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:52,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305428424] [2022-11-16 12:49:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:52,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-16 12:49:53,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:53,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305428424] [2022-11-16 12:49:53,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305428424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:53,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:53,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:49:53,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343758695] [2022-11-16 12:49:53,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:53,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:49:53,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:53,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:49:53,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:49:53,263 INFO L87 Difference]: Start difference. First operand 18751 states and 22334 transitions. Second operand has 4 states, 4 states have (on average 72.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:54,451 INFO L93 Difference]: Finished difference Result 40545 states and 48863 transitions. [2022-11-16 12:49:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:49:54,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2022-11-16 12:49:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:54,479 INFO L225 Difference]: With dead ends: 40545 [2022-11-16 12:49:54,480 INFO L226 Difference]: Without dead ends: 21392 [2022-11-16 12:49:54,491 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 [2022-11-16 12:49:54,492 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 567 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:54,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 58 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:49:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21392 states. [2022-11-16 12:49:54,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21392 to 21391. [2022-11-16 12:49:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21391 states, 21390 states have (on average 1.1180925666199157) internal successors, (23916), 21390 states have internal predecessors, (23916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21391 states to 21391 states and 23916 transitions. [2022-11-16 12:49:54,990 INFO L78 Accepts]: Start accepts. Automaton has 21391 states and 23916 transitions. Word has length 304 [2022-11-16 12:49:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:54,990 INFO L495 AbstractCegarLoop]: Abstraction has 21391 states and 23916 transitions. [2022-11-16 12:49:54,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 21391 states and 23916 transitions. [2022-11-16 12:49:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-11-16 12:49:55,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:55,021 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:49:55,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:49:55,022 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:55,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:55,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1263301683, now seen corresponding path program 1 times [2022-11-16 12:49:55,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:55,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787589148] [2022-11-16 12:49:55,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:55,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:55,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:55,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787589148] [2022-11-16 12:49:55,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787589148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:55,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:55,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:49:55,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732343215] [2022-11-16 12:49:55,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:55,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:55,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:55,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:55,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:55,410 INFO L87 Difference]: Start difference. First operand 21391 states and 23916 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:56,516 INFO L93 Difference]: Finished difference Result 45218 states and 51089 transitions. [2022-11-16 12:49:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:56,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 306 [2022-11-16 12:49:56,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:56,567 INFO L225 Difference]: With dead ends: 45218 [2022-11-16 12:49:56,567 INFO L226 Difference]: Without dead ends: 24846 [2022-11-16 12:49:56,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:56,585 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 238 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:56,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 302 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:49:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24846 states. [2022-11-16 12:49:57,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24846 to 24842. [2022-11-16 12:49:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24842 states, 24841 states have (on average 1.1308320921057928) internal successors, (28091), 24841 states have internal predecessors, (28091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24842 states to 24842 states and 28091 transitions. [2022-11-16 12:49:57,166 INFO L78 Accepts]: Start accepts. Automaton has 24842 states and 28091 transitions. Word has length 306 [2022-11-16 12:49:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:57,167 INFO L495 AbstractCegarLoop]: Abstraction has 24842 states and 28091 transitions. [2022-11-16 12:49:57,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 24842 states and 28091 transitions. [2022-11-16 12:49:57,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-16 12:49:57,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:57,189 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:49:57,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:49:57,190 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:57,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:57,190 INFO L85 PathProgramCache]: Analyzing trace with hash 742982880, now seen corresponding path program 1 times [2022-11-16 12:49:57,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:57,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338959074] [2022-11-16 12:49:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:57,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-16 12:49:57,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:57,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338959074] [2022-11-16 12:49:57,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338959074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:57,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:57,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:49:57,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427120549] [2022-11-16 12:49:57,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:57,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:57,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:57,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:57,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:57,714 INFO L87 Difference]: Start difference. First operand 24842 states and 28091 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:58,751 INFO L93 Difference]: Finished difference Result 54980 states and 62307 transitions. [2022-11-16 12:49:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:49:58,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 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 311 [2022-11-16 12:49:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:58,795 INFO L225 Difference]: With dead ends: 54980 [2022-11-16 12:49:58,795 INFO L226 Difference]: Without dead ends: 31360 [2022-11-16 12:49:58,814 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 [2022-11-16 12:49:58,815 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 212 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:58,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 132 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:49:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31360 states. [2022-11-16 12:49:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31360 to 31357. [2022-11-16 12:49:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31357 states, 31356 states have (on average 1.132351065186886) internal successors, (35506), 31356 states have internal predecessors, (35506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31357 states to 31357 states and 35506 transitions. [2022-11-16 12:49:59,508 INFO L78 Accepts]: Start accepts. Automaton has 31357 states and 35506 transitions. Word has length 311 [2022-11-16 12:49:59,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:59,508 INFO L495 AbstractCegarLoop]: Abstraction has 31357 states and 35506 transitions. [2022-11-16 12:49:59,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 31357 states and 35506 transitions. [2022-11-16 12:49:59,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-11-16 12:49:59,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:59,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:49:59,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:49:59,536 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:49:59,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:59,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1911851829, now seen corresponding path program 1 times [2022-11-16 12:49:59,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:49:59,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779102578] [2022-11-16 12:49:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:59,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:49:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:59,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:49:59,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779102578] [2022-11-16 12:49:59,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779102578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:59,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:59,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:49:59,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940884647] [2022-11-16 12:49:59,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:59,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:49:59,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:49:59,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:49:59,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:49:59,920 INFO L87 Difference]: Start difference. First operand 31357 states and 35506 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:00,954 INFO L93 Difference]: Finished difference Result 72259 states and 82138 transitions. [2022-11-16 12:50:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:50:00,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 318 [2022-11-16 12:50:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:01,011 INFO L225 Difference]: With dead ends: 72259 [2022-11-16 12:50:01,012 INFO L226 Difference]: Without dead ends: 42124 [2022-11-16 12:50:01,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:50:01,036 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 208 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:01,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 322 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:50:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42124 states. [2022-11-16 12:50:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42124 to 41711. [2022-11-16 12:50:01,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41711 states, 41710 states have (on average 1.1140733637017501) internal successors, (46468), 41710 states have internal predecessors, (46468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:01,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41711 states to 41711 states and 46468 transitions. [2022-11-16 12:50:01,872 INFO L78 Accepts]: Start accepts. Automaton has 41711 states and 46468 transitions. Word has length 318 [2022-11-16 12:50:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:01,873 INFO L495 AbstractCegarLoop]: Abstraction has 41711 states and 46468 transitions. [2022-11-16 12:50:01,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:01,873 INFO L276 IsEmpty]: Start isEmpty. Operand 41711 states and 46468 transitions. [2022-11-16 12:50:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-11-16 12:50:01,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:01,913 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:01,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 12:50:01,913 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:50:01,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:01,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1957831273, now seen corresponding path program 1 times [2022-11-16 12:50:01,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:01,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396368482] [2022-11-16 12:50:01,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:01,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 12:50:02,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:02,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396368482] [2022-11-16 12:50:02,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396368482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:02,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:02,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:50:02,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298483922] [2022-11-16 12:50:02,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:02,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:50:02,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:02,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:50:02,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:50:02,436 INFO L87 Difference]: Start difference. First operand 41711 states and 46468 transitions. Second operand has 4 states, 4 states have (on average 76.5) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:04,002 INFO L93 Difference]: Finished difference Result 74502 states and 82954 transitions. [2022-11-16 12:50:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:50:04,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 324 [2022-11-16 12:50:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:04,052 INFO L225 Difference]: With dead ends: 74502 [2022-11-16 12:50:04,053 INFO L226 Difference]: Without dead ends: 42964 [2022-11-16 12:50:04,078 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 [2022-11-16 12:50:04,079 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 331 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:04,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 113 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 12:50:04,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42964 states. [2022-11-16 12:50:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42964 to 42530. [2022-11-16 12:50:04,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42530 states, 42529 states have (on average 1.1131228103176656) internal successors, (47340), 42529 states have internal predecessors, (47340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:05,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42530 states to 42530 states and 47340 transitions. [2022-11-16 12:50:05,063 INFO L78 Accepts]: Start accepts. Automaton has 42530 states and 47340 transitions. Word has length 324 [2022-11-16 12:50:05,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:05,064 INFO L495 AbstractCegarLoop]: Abstraction has 42530 states and 47340 transitions. [2022-11-16 12:50:05,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:05,064 INFO L276 IsEmpty]: Start isEmpty. Operand 42530 states and 47340 transitions. [2022-11-16 12:50:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-11-16 12:50:05,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:05,148 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, 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] [2022-11-16 12:50:05,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:50:05,149 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:50:05,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:05,149 INFO L85 PathProgramCache]: Analyzing trace with hash 754629596, now seen corresponding path program 1 times [2022-11-16 12:50:05,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:05,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754719308] [2022-11-16 12:50:05,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:05,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 131 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:07,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:07,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754719308] [2022-11-16 12:50:07,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754719308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:07,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303635028] [2022-11-16 12:50:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:07,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:07,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:07,020 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:07,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:50:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:07,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:50:07,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-11-16 12:50:07,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:07,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303635028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:07,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:50:07,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-16 12:50:07,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366800272] [2022-11-16 12:50:07,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:07,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:50:07,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:07,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:50:07,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:50:07,781 INFO L87 Difference]: Start difference. First operand 42530 states and 47340 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:08,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:08,781 INFO L93 Difference]: Finished difference Result 81202 states and 90524 transitions. [2022-11-16 12:50:08,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:50:08,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 335 [2022-11-16 12:50:08,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:08,824 INFO L225 Difference]: With dead ends: 81202 [2022-11-16 12:50:08,825 INFO L226 Difference]: Without dead ends: 40907 [2022-11-16 12:50:08,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:50:08,849 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:08,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 83 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:50:08,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40907 states. [2022-11-16 12:50:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40907 to 37455. [2022-11-16 12:50:09,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37455 states, 37454 states have (on average 1.0978800662145565) internal successors, (41120), 37454 states have internal predecessors, (41120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37455 states to 37455 states and 41120 transitions. [2022-11-16 12:50:09,407 INFO L78 Accepts]: Start accepts. Automaton has 37455 states and 41120 transitions. Word has length 335 [2022-11-16 12:50:09,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:09,408 INFO L495 AbstractCegarLoop]: Abstraction has 37455 states and 41120 transitions. [2022-11-16 12:50:09,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:09,408 INFO L276 IsEmpty]: Start isEmpty. Operand 37455 states and 41120 transitions. [2022-11-16 12:50:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-11-16 12:50:09,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:09,445 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:50:09,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 12:50:09,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:50:09,646 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:50:09,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:09,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1428170675, now seen corresponding path program 1 times [2022-11-16 12:50:09,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:09,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473914441] [2022-11-16 12:50:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:09,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-16 12:50:10,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:10,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473914441] [2022-11-16 12:50:10,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473914441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:10,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:10,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:50:10,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814587844] [2022-11-16 12:50:10,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:10,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:50:10,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:10,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:50:10,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:50:10,139 INFO L87 Difference]: Start difference. First operand 37455 states and 41120 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:11,112 INFO L93 Difference]: Finished difference Result 72675 states and 79797 transitions. [2022-11-16 12:50:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:50:11,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 states have internal predecessors, (271), 0 states have call successors, (0), 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 378 [2022-11-16 12:50:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:11,147 INFO L225 Difference]: With dead ends: 72675 [2022-11-16 12:50:11,147 INFO L226 Difference]: Without dead ends: 37049 [2022-11-16 12:50:11,295 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 [2022-11-16 12:50:11,295 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 151 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:11,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 123 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:50:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37049 states. [2022-11-16 12:50:11,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37049 to 36440. [2022-11-16 12:50:11,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36440 states, 36439 states have (on average 1.0712972364774005) internal successors, (39037), 36439 states have internal predecessors, (39037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36440 states to 36440 states and 39037 transitions. [2022-11-16 12:50:11,710 INFO L78 Accepts]: Start accepts. Automaton has 36440 states and 39037 transitions. Word has length 378 [2022-11-16 12:50:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:11,711 INFO L495 AbstractCegarLoop]: Abstraction has 36440 states and 39037 transitions. [2022-11-16 12:50:11,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:11,711 INFO L276 IsEmpty]: Start isEmpty. Operand 36440 states and 39037 transitions. [2022-11-16 12:50:11,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-11-16 12:50:11,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:11,737 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:11,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:50:11,738 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:50:11,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:11,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1921679651, now seen corresponding path program 1 times [2022-11-16 12:50:11,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:11,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142213095] [2022-11-16 12:50:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:11,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 183 proven. 6 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-11-16 12:50:12,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:12,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142213095] [2022-11-16 12:50:12,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142213095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:12,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109005472] [2022-11-16 12:50:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:12,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:12,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:12,535 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:12,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:50:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:12,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:50:12,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-11-16 12:50:13,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:13,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109005472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:13,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:50:13,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-16 12:50:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726213660] [2022-11-16 12:50:13,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:13,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:50:13,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:13,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:50:13,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:13,058 INFO L87 Difference]: Start difference. First operand 36440 states and 39037 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:14,078 INFO L93 Difference]: Finished difference Result 69419 states and 74403 transitions. [2022-11-16 12:50:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:50:14,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 433 [2022-11-16 12:50:14,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:14,117 INFO L225 Difference]: With dead ends: 69419 [2022-11-16 12:50:14,117 INFO L226 Difference]: Without dead ends: 34605 [2022-11-16 12:50:14,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:14,136 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 217 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:14,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 79 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:50:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34605 states. [2022-11-16 12:50:14,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34605 to 30329. [2022-11-16 12:50:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30329 states, 30328 states have (on average 1.0658797151147454) internal successors, (32326), 30328 states have internal predecessors, (32326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30329 states to 30329 states and 32326 transitions. [2022-11-16 12:50:14,673 INFO L78 Accepts]: Start accepts. Automaton has 30329 states and 32326 transitions. Word has length 433 [2022-11-16 12:50:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:14,673 INFO L495 AbstractCegarLoop]: Abstraction has 30329 states and 32326 transitions. [2022-11-16 12:50:14,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 30329 states and 32326 transitions. [2022-11-16 12:50:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2022-11-16 12:50:14,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:14,699 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:50:14,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:14,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:14,901 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:50:14,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:14,901 INFO L85 PathProgramCache]: Analyzing trace with hash 680795419, now seen corresponding path program 1 times [2022-11-16 12:50:14,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:14,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434590077] [2022-11-16 12:50:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:14,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 449 proven. 18 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-16 12:50:15,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:15,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434590077] [2022-11-16 12:50:15,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434590077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:15,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571732513] [2022-11-16 12:50:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:15,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:15,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:15,690 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:15,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:50:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:16,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:50:16,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-16 12:50:16,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:16,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571732513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:16,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:50:16,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 12:50:16,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180734587] [2022-11-16 12:50:16,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:16,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:50:16,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:50:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:50:16,404 INFO L87 Difference]: Start difference. First operand 30329 states and 32326 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:17,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:17,070 INFO L93 Difference]: Finished difference Result 77561 states and 82659 transitions. [2022-11-16 12:50:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:50:17,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 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 472 [2022-11-16 12:50:17,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:17,113 INFO L225 Difference]: With dead ends: 77561 [2022-11-16 12:50:17,113 INFO L226 Difference]: Without dead ends: 49061 [2022-11-16 12:50:17,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:50:17,122 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 162 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:17,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 475 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:50:17,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49061 states. [2022-11-16 12:50:17,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49061 to 43962. [2022-11-16 12:50:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43962 states, 43961 states have (on average 1.063192375059712) internal successors, (46739), 43961 states have internal predecessors, (46739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:17,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43962 states to 43962 states and 46739 transitions. [2022-11-16 12:50:17,799 INFO L78 Accepts]: Start accepts. Automaton has 43962 states and 46739 transitions. Word has length 472 [2022-11-16 12:50:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:17,800 INFO L495 AbstractCegarLoop]: Abstraction has 43962 states and 46739 transitions. [2022-11-16 12:50:17,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 43962 states and 46739 transitions. [2022-11-16 12:50:17,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2022-11-16 12:50:17,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:17,838 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:17,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:18,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 12:50:18,044 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:50:18,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:18,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1862855191, now seen corresponding path program 1 times [2022-11-16 12:50:18,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:18,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184388573] [2022-11-16 12:50:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:18,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 377 proven. 95 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-16 12:50:18,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:18,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184388573] [2022-11-16 12:50:18,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184388573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:18,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186106995] [2022-11-16 12:50:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:18,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:18,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:18,763 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:18,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:50:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:19,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:50:19,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 472 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-16 12:50:19,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:19,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186106995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:19,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:50:19,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-16 12:50:19,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628146940] [2022-11-16 12:50:19,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:19,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:50:19,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:19,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:50:19,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:19,303 INFO L87 Difference]: Start difference. First operand 43962 states and 46739 transitions. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:20,496 INFO L93 Difference]: Finished difference Result 88547 states and 94260 transitions. [2022-11-16 12:50:20,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:50:20,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 492 [2022-11-16 12:50:20,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:20,568 INFO L225 Difference]: With dead ends: 88547 [2022-11-16 12:50:20,569 INFO L226 Difference]: Without dead ends: 44790 [2022-11-16 12:50:20,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:20,600 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 129 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:20,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 290 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:50:20,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44790 states. [2022-11-16 12:50:21,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44790 to 44360. [2022-11-16 12:50:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44360 states, 44359 states have (on average 1.0613855136499921) internal successors, (47082), 44359 states have internal predecessors, (47082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:21,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44360 states to 44360 states and 47082 transitions. [2022-11-16 12:50:21,281 INFO L78 Accepts]: Start accepts. Automaton has 44360 states and 47082 transitions. Word has length 492 [2022-11-16 12:50:21,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:21,282 INFO L495 AbstractCegarLoop]: Abstraction has 44360 states and 47082 transitions. [2022-11-16 12:50:21,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:21,282 INFO L276 IsEmpty]: Start isEmpty. Operand 44360 states and 47082 transitions. [2022-11-16 12:50:21,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-11-16 12:50:21,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:21,314 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:21,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:21,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:21,517 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:50:21,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:21,518 INFO L85 PathProgramCache]: Analyzing trace with hash 538897045, now seen corresponding path program 1 times [2022-11-16 12:50:21,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:21,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206655802] [2022-11-16 12:50:21,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:21,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 311 proven. 6 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-11-16 12:50:22,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:22,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206655802] [2022-11-16 12:50:22,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206655802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410641161] [2022-11-16 12:50:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:22,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:22,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:22,050 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:22,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:50:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:22,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:50:22,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 311 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-16 12:50:22,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:22,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410641161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:22,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:50:22,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-16 12:50:22,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432464778] [2022-11-16 12:50:22,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:22,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:50:22,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:22,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:50:22,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:22,581 INFO L87 Difference]: Start difference. First operand 44360 states and 47082 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 2 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) [2022-11-16 12:50:23,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:23,329 INFO L93 Difference]: Finished difference Result 117833 states and 125200 transitions. [2022-11-16 12:50:23,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:50:23,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 2 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 505 [2022-11-16 12:50:23,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:23,428 INFO L225 Difference]: With dead ends: 117833 [2022-11-16 12:50:23,428 INFO L226 Difference]: Without dead ends: 74896 [2022-11-16 12:50:23,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:23,454 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 178 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:23,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 472 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:50:23,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74896 states. [2022-11-16 12:50:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74896 to 73880. [2022-11-16 12:50:24,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73880 states, 73879 states have (on average 1.0614653690493916) internal successors, (78420), 73879 states have internal predecessors, (78420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73880 states to 73880 states and 78420 transitions. [2022-11-16 12:50:24,582 INFO L78 Accepts]: Start accepts. Automaton has 73880 states and 78420 transitions. Word has length 505 [2022-11-16 12:50:24,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:24,583 INFO L495 AbstractCegarLoop]: Abstraction has 73880 states and 78420 transitions. [2022-11-16 12:50:24,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 2 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) [2022-11-16 12:50:24,583 INFO L276 IsEmpty]: Start isEmpty. Operand 73880 states and 78420 transitions. [2022-11-16 12:50:24,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-11-16 12:50:24,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:24,620 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:24,875 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forcibly destroying the process [2022-11-16 12:50:24,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:24,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:24,911 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:50:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:24,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1531633206, now seen corresponding path program 1 times [2022-11-16 12:50:24,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:24,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718072018] [2022-11-16 12:50:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:24,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 531 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-16 12:50:25,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:25,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718072018] [2022-11-16 12:50:25,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718072018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:25,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:25,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:50:25,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635819077] [2022-11-16 12:50:25,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:25,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:50:25,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:25,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:50:25,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:50:25,387 INFO L87 Difference]: Start difference. First operand 73880 states and 78420 transitions. Second operand has 4 states, 4 states have (on average 108.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:26,710 INFO L93 Difference]: Finished difference Result 143499 states and 152370 transitions. [2022-11-16 12:50:26,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:50:26,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 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 521 [2022-11-16 12:50:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:26,778 INFO L225 Difference]: With dead ends: 143499 [2022-11-16 12:50:26,779 INFO L226 Difference]: Without dead ends: 72467 [2022-11-16 12:50:26,804 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 [2022-11-16 12:50:26,804 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 317 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:26,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 373 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:50:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72467 states. [2022-11-16 12:50:27,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72467 to 70638. [2022-11-16 12:50:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70638 states, 70637 states have (on average 1.0614267310333112) internal successors, (74976), 70637 states have internal predecessors, (74976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70638 states to 70638 states and 74976 transitions. [2022-11-16 12:50:27,748 INFO L78 Accepts]: Start accepts. Automaton has 70638 states and 74976 transitions. Word has length 521 [2022-11-16 12:50:27,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:27,748 INFO L495 AbstractCegarLoop]: Abstraction has 70638 states and 74976 transitions. [2022-11-16 12:50:27,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 70638 states and 74976 transitions. [2022-11-16 12:50:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2022-11-16 12:50:28,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:28,167 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:28,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-16 12:50:28,168 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:50:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:28,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1981259613, now seen corresponding path program 1 times [2022-11-16 12:50:28,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:28,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259278679] [2022-11-16 12:50:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:28,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 361 proven. 9 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-11-16 12:50:29,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:29,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259278679] [2022-11-16 12:50:29,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259278679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:29,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979114289] [2022-11-16 12:50:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:29,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:29,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:29,331 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:29,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:50:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:50:29,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 364 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2022-11-16 12:50:29,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:29,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979114289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:29,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:50:29,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-16 12:50:29,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483766723] [2022-11-16 12:50:29,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:29,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:50:29,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:29,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:50:29,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:50:29,747 INFO L87 Difference]: Start difference. First operand 70638 states and 74976 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:30,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:30,877 INFO L93 Difference]: Finished difference Result 141507 states and 150226 transitions. [2022-11-16 12:50:30,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:50:30,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 534 [2022-11-16 12:50:30,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:30,944 INFO L225 Difference]: With dead ends: 141507 [2022-11-16 12:50:30,944 INFO L226 Difference]: Without dead ends: 72292 [2022-11-16 12:50:30,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:50:30,974 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 210 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:30,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 324 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:50:31,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72292 states. [2022-11-16 12:50:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72292 to 69217. [2022-11-16 12:50:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69217 states, 69216 states have (on average 1.0601161581137308) internal successors, (73377), 69216 states have internal predecessors, (73377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:32,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69217 states to 69217 states and 73377 transitions. [2022-11-16 12:50:32,220 INFO L78 Accepts]: Start accepts. Automaton has 69217 states and 73377 transitions. Word has length 534 [2022-11-16 12:50:32,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:32,220 INFO L495 AbstractCegarLoop]: Abstraction has 69217 states and 73377 transitions. [2022-11-16 12:50:32,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:32,221 INFO L276 IsEmpty]: Start isEmpty. Operand 69217 states and 73377 transitions. [2022-11-16 12:50:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-11-16 12:50:32,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:32,260 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:50:32,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:32,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 12:50:32,461 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:50:32,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:32,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1223475899, now seen corresponding path program 1 times [2022-11-16 12:50:32,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:32,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001995960] [2022-11-16 12:50:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:32,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 148 proven. 6 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2022-11-16 12:50:33,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:33,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001995960] [2022-11-16 12:50:33,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001995960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:33,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157877947] [2022-11-16 12:50:33,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:33,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:33,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:33,353 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:33,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:50:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:33,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:50:33,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 515 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-16 12:50:34,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:34,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157877947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:34,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:50:34,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-16 12:50:34,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376969246] [2022-11-16 12:50:34,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:34,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:50:34,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:34,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:50:34,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:34,203 INFO L87 Difference]: Start difference. First operand 69217 states and 73377 transitions. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:35,432 INFO L93 Difference]: Finished difference Result 131711 states and 139356 transitions. [2022-11-16 12:50:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:50:35,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 549 [2022-11-16 12:50:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:35,488 INFO L225 Difference]: With dead ends: 131711 [2022-11-16 12:50:35,488 INFO L226 Difference]: Without dead ends: 57214 [2022-11-16 12:50:35,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:35,521 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 98 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:35,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 299 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:50:35,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57214 states. [2022-11-16 12:50:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57214 to 50491. [2022-11-16 12:50:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50491 states, 50490 states have (on average 1.0473757179639533) internal successors, (52882), 50490 states have internal predecessors, (52882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50491 states to 50491 states and 52882 transitions. [2022-11-16 12:50:36,407 INFO L78 Accepts]: Start accepts. Automaton has 50491 states and 52882 transitions. Word has length 549 [2022-11-16 12:50:36,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:36,408 INFO L495 AbstractCegarLoop]: Abstraction has 50491 states and 52882 transitions. [2022-11-16 12:50:36,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 50491 states and 52882 transitions. [2022-11-16 12:50:36,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2022-11-16 12:50:36,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:36,445 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 12:50:36,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:36,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:36,652 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:50:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:36,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1563803765, now seen corresponding path program 1 times [2022-11-16 12:50:36,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:36,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121306477] [2022-11-16 12:50:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:36,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 549 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:37,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:37,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121306477] [2022-11-16 12:50:37,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121306477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:37,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792428346] [2022-11-16 12:50:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:37,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:37,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:37,679 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:37,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:50:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:38,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:50:38,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 678 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-16 12:50:38,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:38,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792428346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:38,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:50:38,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-16 12:50:38,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074134405] [2022-11-16 12:50:38,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:38,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:50:38,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:38,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:50:38,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:50:38,409 INFO L87 Difference]: Start difference. First operand 50491 states and 52882 transitions. Second operand has 4 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:39,849 INFO L93 Difference]: Finished difference Result 137842 states and 144385 transitions. [2022-11-16 12:50:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:50:39,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 561 [2022-11-16 12:50:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:39,929 INFO L225 Difference]: With dead ends: 137842 [2022-11-16 12:50:39,929 INFO L226 Difference]: Without dead ends: 89180 [2022-11-16 12:50:39,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:50:39,958 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 355 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:39,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 504 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:50:40,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89180 states. [2022-11-16 12:50:41,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89180 to 89166. [2022-11-16 12:50:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89166 states, 89165 states have (on average 1.0469691022262098) internal successors, (93353), 89165 states have internal predecessors, (93353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89166 states to 89166 states and 93353 transitions. [2022-11-16 12:50:41,491 INFO L78 Accepts]: Start accepts. Automaton has 89166 states and 93353 transitions. Word has length 561 [2022-11-16 12:50:41,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:41,492 INFO L495 AbstractCegarLoop]: Abstraction has 89166 states and 93353 transitions. [2022-11-16 12:50:41,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 89166 states and 93353 transitions. [2022-11-16 12:50:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2022-11-16 12:50:42,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:42,025 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 12:50:42,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:42,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:50:42,233 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:50:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1467292770, now seen corresponding path program 1 times [2022-11-16 12:50:42,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:50:42,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060641246] [2022-11-16 12:50:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:42,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:50:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1975 backedges. 298 proven. 6 refuted. 0 times theorem prover too weak. 1671 trivial. 0 not checked. [2022-11-16 12:50:43,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:50:43,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060641246] [2022-11-16 12:50:43,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060641246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:43,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83100160] [2022-11-16 12:50:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:43,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:50:43,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:50:43,379 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:50:43,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a0a001-c844-463b-82ed-6a195b9a6172/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:50:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:43,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1321 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:50:43,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1975 backedges. 1479 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-11-16 12:50:44,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:44,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83100160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:44,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:50:44,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-16 12:50:44,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236445649] [2022-11-16 12:50:44,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:44,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:50:44,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:50:44,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:50:44,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:44,447 INFO L87 Difference]: Start difference. First operand 89166 states and 93353 transitions. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:45,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:45,561 INFO L93 Difference]: Finished difference Result 209923 states and 219610 transitions. [2022-11-16 12:50:45,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:50:45,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 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 784 [2022-11-16 12:50:45,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:45,684 INFO L225 Difference]: With dead ends: 209923 [2022-11-16 12:50:45,684 INFO L226 Difference]: Without dead ends: 122586 [2022-11-16 12:50:45,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:45,707 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 109 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:45,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 685 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:50:45,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122586 states. [2022-11-16 12:50:47,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122586 to 119744. [2022-11-16 12:50:47,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119744 states, 119743 states have (on average 1.0426246210634442) internal successors, (124847), 119743 states have internal predecessors, (124847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:47,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119744 states to 119744 states and 124847 transitions. [2022-11-16 12:50:47,795 INFO L78 Accepts]: Start accepts. Automaton has 119744 states and 124847 transitions. Word has length 784 [2022-11-16 12:50:47,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:47,796 INFO L495 AbstractCegarLoop]: Abstraction has 119744 states and 124847 transitions. [2022-11-16 12:50:47,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:47,796 INFO L276 IsEmpty]: Start isEmpty. Operand 119744 states and 124847 transitions.