./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/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_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/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_7a344ffc-09b3-48ed-977a-5921a254ae82/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 2468c605d5c29b15a54525a5c6944fa0a2b4d36426cacd5fefa10555cb2b8a7a --- 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 11:42:55,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:42:55,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:42:55,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:42:55,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:42:55,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:42:55,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:42:55,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:42:55,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:42:55,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:42:55,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:42:55,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:42:55,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:42:55,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:42:55,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:42:55,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:42:55,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:42:55,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:42:55,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:42:55,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:42:55,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:42:55,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:42:55,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:42:55,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:42:55,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:42:55,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:42:55,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:42:55,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:42:55,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:42:55,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:42:55,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:42:55,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:42:55,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:42:55,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:42:55,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:42:55,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:42:55,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:42:55,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:42:55,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:42:55,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:42:55,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:42:55,601 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:42:55,625 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:42:55,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:42:55,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:42:55,626 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:42:55,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:42:55,627 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:42:55,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:42:55,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:42:55,628 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:42:55,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:42:55,628 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:42:55,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:42:55,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:42:55,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:42:55,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:42:55,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:42:55,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:42:55,630 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:42:55,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:42:55,630 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:42:55,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:42:55,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:42:55,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:42:55,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:42:55,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:42:55,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:42:55,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:42:55,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:42:55,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:42:55,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:42:55,633 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:42:55,633 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:42:55,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:42:55,634 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_7a344ffc-09b3-48ed-977a-5921a254ae82/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2468c605d5c29b15a54525a5c6944fa0a2b4d36426cacd5fefa10555cb2b8a7a [2022-11-16 11:42:55,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:42:55,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:42:55,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:42:55,986 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:42:55,987 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:42:55,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2022-11-16 11:42:56,091 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/data/402309f9d/881470d8cb7d4c2da59b2e22047bcb3c/FLAG99226b1b0 [2022-11-16 11:42:56,676 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:42:56,677 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2022-11-16 11:42:56,691 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/data/402309f9d/881470d8cb7d4c2da59b2e22047bcb3c/FLAG99226b1b0 [2022-11-16 11:42:56,956 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/data/402309f9d/881470d8cb7d4c2da59b2e22047bcb3c [2022-11-16 11:42:56,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:42:56,961 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:42:56,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:42:56,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:42:56,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:42:56,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:42:56" (1/1) ... [2022-11-16 11:42:56,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51cf76c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:56, skipping insertion in model container [2022-11-16 11:42:56,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:42:56" (1/1) ... [2022-11-16 11:42:56,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:42:57,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:42:57,279 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_7a344ffc-09b3-48ed-977a-5921a254ae82/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[913,926] [2022-11-16 11:42:57,325 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_7a344ffc-09b3-48ed-977a-5921a254ae82/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[5977,5990] [2022-11-16 11:42:57,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:42:57,414 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:42:57,427 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_7a344ffc-09b3-48ed-977a-5921a254ae82/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[913,926] [2022-11-16 11:42:57,445 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_7a344ffc-09b3-48ed-977a-5921a254ae82/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[5977,5990] [2022-11-16 11:42:57,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:42:57,508 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:42:57,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:57 WrapperNode [2022-11-16 11:42:57,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:42:57,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:42:57,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:42:57,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:42:57,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:57" (1/1) ... [2022-11-16 11:42:57,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:57" (1/1) ... [2022-11-16 11:42:57,601 INFO L138 Inliner]: procedures = 58, calls = 64, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 654 [2022-11-16 11:42:57,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:42:57,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:42:57,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:42:57,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:42:57,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:57" (1/1) ... [2022-11-16 11:42:57,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:57" (1/1) ... [2022-11-16 11:42:57,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:57" (1/1) ... [2022-11-16 11:42:57,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:57" (1/1) ... [2022-11-16 11:42:57,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:57" (1/1) ... [2022-11-16 11:42:57,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:57" (1/1) ... [2022-11-16 11:42:57,653 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:57" (1/1) ... [2022-11-16 11:42:57,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:57" (1/1) ... [2022-11-16 11:42:57,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:42:57,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:42:57,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:42:57,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:42:57,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:57" (1/1) ... [2022-11-16 11:42:57,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:42:57,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:57,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:42:57,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:42:57,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:42:57,778 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 11:42:57,778 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 11:42:57,779 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-16 11:42:57,781 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-16 11:42:57,781 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-16 11:42:57,781 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-16 11:42:57,781 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-16 11:42:57,781 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-16 11:42:57,782 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-16 11:42:57,782 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-16 11:42:57,782 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-16 11:42:57,782 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-16 11:42:57,782 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-16 11:42:57,782 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-16 11:42:57,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:42:57,783 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-16 11:42:57,783 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-16 11:42:57,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:42:57,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:42:57,785 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-16 11:42:57,785 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-16 11:42:57,785 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-16 11:42:57,785 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-16 11:42:57,931 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:42:57,933 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:42:58,694 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:42:58,710 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:42:58,713 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-16 11:42:58,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:42:58 BoogieIcfgContainer [2022-11-16 11:42:58,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:42:58,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:42:58,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:42:58,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:42:58,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:42:56" (1/3) ... [2022-11-16 11:42:58,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e9b589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:42:58, skipping insertion in model container [2022-11-16 11:42:58,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:57" (2/3) ... [2022-11-16 11:42:58,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e9b589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:42:58, skipping insertion in model container [2022-11-16 11:42:58,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:42:58" (3/3) ... [2022-11-16 11:42:58,737 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2022-11-16 11:42:58,758 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:42:58,759 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 11:42:58,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:42:58,867 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;@326a8e0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:42:58,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:42:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 287 states, 247 states have (on average 1.6153846153846154) internal successors, (399), 254 states have internal predecessors, (399), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-16 11:42:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 11:42:58,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:58,893 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] [2022-11-16 11:42:58,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:42:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:58,904 INFO L85 PathProgramCache]: Analyzing trace with hash -335189264, now seen corresponding path program 1 times [2022-11-16 11:42:58,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:58,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999971938] [2022-11-16 11:42:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:58,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:59,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 11:42:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:59,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-16 11:42:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:59,362 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 11:42:59,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:59,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999971938] [2022-11-16 11:42:59,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999971938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:59,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:59,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:42:59,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515205784] [2022-11-16 11:42:59,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:59,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:42:59,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:59,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:42:59,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:42:59,427 INFO L87 Difference]: Start difference. First operand has 287 states, 247 states have (on average 1.6153846153846154) internal successors, (399), 254 states have internal predecessors, (399), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:43:00,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:00,139 INFO L93 Difference]: Finished difference Result 625 states and 988 transitions. [2022-11-16 11:43:00,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:43:00,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-11-16 11:43:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:00,155 INFO L225 Difference]: With dead ends: 625 [2022-11-16 11:43:00,156 INFO L226 Difference]: Without dead ends: 346 [2022-11-16 11:43:00,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:00,164 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 537 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:00,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 594 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:43:00,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-16 11:43:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 340. [2022-11-16 11:43:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 296 states have (on average 1.4864864864864864) internal successors, (440), 301 states have internal predecessors, (440), 31 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (33), 27 states have call predecessors, (33), 27 states have call successors, (33) [2022-11-16 11:43:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 504 transitions. [2022-11-16 11:43:00,241 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 504 transitions. Word has length 44 [2022-11-16 11:43:00,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:00,242 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 504 transitions. [2022-11-16 11:43:00,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:43:00,242 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 504 transitions. [2022-11-16 11:43:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 11:43:00,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:00,245 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] [2022-11-16 11:43:00,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:43:00,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:00,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:00,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1892579596, now seen corresponding path program 1 times [2022-11-16 11:43:00,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:00,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107630741] [2022-11-16 11:43:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:00,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:00,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 11:43:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:00,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 11:43:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:00,337 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 11:43:00,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:00,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107630741] [2022-11-16 11:43:00,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107630741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:00,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:00,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:43:00,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209723792] [2022-11-16 11:43:00,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:00,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:43:00,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:43:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:43:00,341 INFO L87 Difference]: Start difference. First operand 340 states and 504 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:43:00,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:00,787 INFO L93 Difference]: Finished difference Result 588 states and 844 transitions. [2022-11-16 11:43:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:43:00,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-16 11:43:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:00,796 INFO L225 Difference]: With dead ends: 588 [2022-11-16 11:43:00,797 INFO L226 Difference]: Without dead ends: 464 [2022-11-16 11:43:00,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:00,804 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 230 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:00,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 786 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:43:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-11-16 11:43:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 407. [2022-11-16 11:43:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 357 states have (on average 1.4677871148459383) internal successors, (524), 362 states have internal predecessors, (524), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (36), 30 states have call predecessors, (36), 30 states have call successors, (36) [2022-11-16 11:43:00,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 594 transitions. [2022-11-16 11:43:00,882 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 594 transitions. Word has length 45 [2022-11-16 11:43:00,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:00,883 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 594 transitions. [2022-11-16 11:43:00,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:43:00,884 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 594 transitions. [2022-11-16 11:43:00,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 11:43:00,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:00,894 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] [2022-11-16 11:43:00,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:43:00,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:00,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1118030239, now seen corresponding path program 1 times [2022-11-16 11:43:00,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:00,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396760333] [2022-11-16 11:43:00,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:00,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:00,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 11:43:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:01,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 11:43:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:01,032 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 11:43:01,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:01,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396760333] [2022-11-16 11:43:01,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396760333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:01,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:01,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:43:01,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78969504] [2022-11-16 11:43:01,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:01,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:43:01,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:01,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:43:01,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:43:01,040 INFO L87 Difference]: Start difference. First operand 407 states and 594 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:43:01,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:01,378 INFO L93 Difference]: Finished difference Result 815 states and 1153 transitions. [2022-11-16 11:43:01,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:43:01,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-16 11:43:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:01,383 INFO L225 Difference]: With dead ends: 815 [2022-11-16 11:43:01,383 INFO L226 Difference]: Without dead ends: 624 [2022-11-16 11:43:01,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:01,385 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 546 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:01,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 588 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:43:01,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-11-16 11:43:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 572. [2022-11-16 11:43:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 503 states have (on average 1.41948310139165) internal successors, (714), 511 states have internal predecessors, (714), 45 states have call successors, (45), 22 states have call predecessors, (45), 22 states have return successors, (53), 39 states have call predecessors, (53), 41 states have call successors, (53) [2022-11-16 11:43:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 812 transitions. [2022-11-16 11:43:01,435 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 812 transitions. Word has length 45 [2022-11-16 11:43:01,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:01,436 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 812 transitions. [2022-11-16 11:43:01,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:43:01,436 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 812 transitions. [2022-11-16 11:43:01,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 11:43:01,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:01,438 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:43:01,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:43:01,439 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:01,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:01,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1874322656, now seen corresponding path program 1 times [2022-11-16 11:43:01,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:01,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736355653] [2022-11-16 11:43:01,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:01,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:01,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 11:43:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:01,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-16 11:43:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:01,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-16 11:43:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:43:01,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:01,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736355653] [2022-11-16 11:43:01,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736355653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:01,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:01,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:43:01,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054082052] [2022-11-16 11:43:01,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:01,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:43:01,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:01,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:43:01,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:43:01,536 INFO L87 Difference]: Start difference. First operand 572 states and 812 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 11:43:01,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:01,991 INFO L93 Difference]: Finished difference Result 1156 states and 1597 transitions. [2022-11-16 11:43:01,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:43:01,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-11-16 11:43:01,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:01,997 INFO L225 Difference]: With dead ends: 1156 [2022-11-16 11:43:01,997 INFO L226 Difference]: Without dead ends: 800 [2022-11-16 11:43:01,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:02,000 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 214 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:02,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 838 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:43:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-11-16 11:43:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 762. [2022-11-16 11:43:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 669 states have (on average 1.3662182361733932) internal successors, (914), 679 states have internal predecessors, (914), 59 states have call successors, (59), 30 states have call predecessors, (59), 32 states have return successors, (77), 53 states have call predecessors, (77), 55 states have call successors, (77) [2022-11-16 11:43:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1050 transitions. [2022-11-16 11:43:02,062 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1050 transitions. Word has length 62 [2022-11-16 11:43:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:02,062 INFO L495 AbstractCegarLoop]: Abstraction has 762 states and 1050 transitions. [2022-11-16 11:43:02,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 11:43:02,063 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1050 transitions. [2022-11-16 11:43:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 11:43:02,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:02,065 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:43:02,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:43:02,066 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:02,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:02,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1000568822, now seen corresponding path program 1 times [2022-11-16 11:43:02,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:02,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23922928] [2022-11-16 11:43:02,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:02,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:02,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 11:43:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:02,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:43:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:02,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-16 11:43:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 11:43:02,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:02,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23922928] [2022-11-16 11:43:02,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23922928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:02,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:02,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:43:02,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687438938] [2022-11-16 11:43:02,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:02,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:43:02,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:02,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:43:02,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:43:02,135 INFO L87 Difference]: Start difference. First operand 762 states and 1050 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 11:43:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:02,531 INFO L93 Difference]: Finished difference Result 1415 states and 1903 transitions. [2022-11-16 11:43:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:43:02,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-11-16 11:43:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:02,537 INFO L225 Difference]: With dead ends: 1415 [2022-11-16 11:43:02,537 INFO L226 Difference]: Without dead ends: 961 [2022-11-16 11:43:02,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:02,540 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 533 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:02,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 586 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:43:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-11-16 11:43:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 906. [2022-11-16 11:43:02,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 797 states have (on average 1.3362609786700126) internal successors, (1065), 809 states have internal predecessors, (1065), 67 states have call successors, (67), 36 states have call predecessors, (67), 40 states have return successors, (91), 61 states have call predecessors, (91), 63 states have call successors, (91) [2022-11-16 11:43:02,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1223 transitions. [2022-11-16 11:43:02,614 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1223 transitions. Word has length 67 [2022-11-16 11:43:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:02,615 INFO L495 AbstractCegarLoop]: Abstraction has 906 states and 1223 transitions. [2022-11-16 11:43:02,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 11:43:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1223 transitions. [2022-11-16 11:43:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 11:43:02,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:02,618 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:43:02,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:43:02,618 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:02,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2083316816, now seen corresponding path program 1 times [2022-11-16 11:43:02,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:02,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162889982] [2022-11-16 11:43:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:02,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:02,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 11:43:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:02,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 11:43:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:02,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-16 11:43:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:43:02,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:02,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162889982] [2022-11-16 11:43:02,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162889982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:02,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183693751] [2022-11-16 11:43:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:02,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:43:02,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:43:02,794 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:43:02,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:43:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:02,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:43:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:03,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:43:03,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183693751] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:03,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:43:03,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-11-16 11:43:03,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391095965] [2022-11-16 11:43:03,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:03,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:43:03,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:03,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:43:03,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:43:03,182 INFO L87 Difference]: Start difference. First operand 906 states and 1223 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 11:43:03,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:03,408 INFO L93 Difference]: Finished difference Result 962 states and 1291 transitions. [2022-11-16 11:43:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:43:03,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-11-16 11:43:03,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:03,414 INFO L225 Difference]: With dead ends: 962 [2022-11-16 11:43:03,414 INFO L226 Difference]: Without dead ends: 959 [2022-11-16 11:43:03,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:43:03,415 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 733 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:03,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 505 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:43:03,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-11-16 11:43:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 905. [2022-11-16 11:43:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 797 states have (on average 1.3337515683814303) internal successors, (1063), 808 states have internal predecessors, (1063), 66 states have call successors, (66), 36 states have call predecessors, (66), 40 states have return successors, (91), 61 states have call predecessors, (91), 63 states have call successors, (91) [2022-11-16 11:43:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1220 transitions. [2022-11-16 11:43:03,514 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1220 transitions. Word has length 68 [2022-11-16 11:43:03,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:03,515 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1220 transitions. [2022-11-16 11:43:03,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 11:43:03,515 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1220 transitions. [2022-11-16 11:43:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:43:03,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:03,518 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:43:03,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:03,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:43:03,729 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:03,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash -159219143, now seen corresponding path program 1 times [2022-11-16 11:43:03,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:03,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738775714] [2022-11-16 11:43:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:03,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:03,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 11:43:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:03,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 11:43:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:03,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-16 11:43:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:43:03,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:03,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738775714] [2022-11-16 11:43:03,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738775714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:03,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114726220] [2022-11-16 11:43:03,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:03,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:43:03,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:43:03,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:43:03,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:43:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:04,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:43:04,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:04,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:43:04,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114726220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:43:04,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:43:04,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-11-16 11:43:04,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004547015] [2022-11-16 11:43:04,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:43:04,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:43:04,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:04,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:43:04,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:43:04,521 INFO L87 Difference]: Start difference. First operand 905 states and 1220 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-16 11:43:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:06,271 INFO L93 Difference]: Finished difference Result 2605 states and 3440 transitions. [2022-11-16 11:43:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 11:43:06,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-11-16 11:43:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:06,280 INFO L225 Difference]: With dead ends: 2605 [2022-11-16 11:43:06,280 INFO L226 Difference]: Without dead ends: 2061 [2022-11-16 11:43:06,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 11:43:06,284 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 890 mSDsluCounter, 2495 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 2898 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:06,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 2898 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1564 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:43:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2022-11-16 11:43:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1294. [2022-11-16 11:43:06,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1147 states have (on average 1.3051438535309503) internal successors, (1497), 1166 states have internal predecessors, (1497), 86 states have call successors, (86), 50 states have call predecessors, (86), 59 states have return successors, (125), 78 states have call predecessors, (125), 83 states have call successors, (125) [2022-11-16 11:43:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1708 transitions. [2022-11-16 11:43:06,449 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1708 transitions. Word has length 69 [2022-11-16 11:43:06,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:06,449 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 1708 transitions. [2022-11-16 11:43:06,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-16 11:43:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1708 transitions. [2022-11-16 11:43:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 11:43:06,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:06,454 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 11:43:06,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:06,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:43:06,665 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:06,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:06,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1275467893, now seen corresponding path program 1 times [2022-11-16 11:43:06,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:06,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221768676] [2022-11-16 11:43:06,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:06,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:06,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-16 11:43:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:06,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 11:43:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:06,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-16 11:43:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:06,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-16 11:43:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 11:43:06,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:06,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221768676] [2022-11-16 11:43:06,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221768676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:06,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893802733] [2022-11-16 11:43:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:06,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:43:06,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:43:06,841 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:43:06,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:43:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:06,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:43:06,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:43:07,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:43:07,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893802733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:07,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:43:07,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 11:43:07,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26572349] [2022-11-16 11:43:07,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:07,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:43:07,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:07,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:43:07,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:07,010 INFO L87 Difference]: Start difference. First operand 1294 states and 1708 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 11:43:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:07,115 INFO L93 Difference]: Finished difference Result 2017 states and 2646 transitions. [2022-11-16 11:43:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:43:07,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-11-16 11:43:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:07,123 INFO L225 Difference]: With dead ends: 2017 [2022-11-16 11:43:07,123 INFO L226 Difference]: Without dead ends: 1172 [2022-11-16 11:43:07,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:07,126 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 373 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:07,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 519 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:43:07,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-11-16 11:43:07,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1157. [2022-11-16 11:43:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1026 states have (on average 1.3050682261208577) internal successors, (1339), 1044 states have internal predecessors, (1339), 78 states have call successors, (78), 44 states have call predecessors, (78), 51 states have return successors, (111), 69 states have call predecessors, (111), 75 states have call successors, (111) [2022-11-16 11:43:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1528 transitions. [2022-11-16 11:43:07,237 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1528 transitions. Word has length 88 [2022-11-16 11:43:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:07,238 INFO L495 AbstractCegarLoop]: Abstraction has 1157 states and 1528 transitions. [2022-11-16 11:43:07,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 11:43:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1528 transitions. [2022-11-16 11:43:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 11:43:07,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:07,241 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] [2022-11-16 11:43:07,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:07,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a344ffc-09b3-48ed-977a-5921a254ae82/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:43:07,451 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:07,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:07,452 INFO L85 PathProgramCache]: Analyzing trace with hash -118977572, now seen corresponding path program 1 times [2022-11-16 11:43:07,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:07,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225764402] [2022-11-16 11:43:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:07,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:07,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:43:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:07,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:43:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:07,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:43:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:07,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 11:43:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:07,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 11:43:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:07,638 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 11:43:07,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:07,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225764402] [2022-11-16 11:43:07,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225764402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:07,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:07,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:43:07,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809165993] [2022-11-16 11:43:07,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:07,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:43:07,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:07,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:43:07,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:07,640 INFO L87 Difference]: Start difference. First operand 1157 states and 1528 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:09,971 INFO L93 Difference]: Finished difference Result 1694 states and 2384 transitions. [2022-11-16 11:43:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:43:09,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-11-16 11:43:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:09,978 INFO L225 Difference]: With dead ends: 1694 [2022-11-16 11:43:09,978 INFO L226 Difference]: Without dead ends: 1498 [2022-11-16 11:43:09,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:43:09,981 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 878 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 2042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:09,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 1662 Invalid, 2042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 11:43:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-11-16 11:43:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1359. [2022-11-16 11:43:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1204 states have (on average 1.3446843853820598) internal successors, (1619), 1224 states have internal predecessors, (1619), 94 states have call successors, (94), 50 states have call predecessors, (94), 59 states have return successors, (134), 86 states have call predecessors, (134), 91 states have call successors, (134) [2022-11-16 11:43:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1847 transitions. [2022-11-16 11:43:10,170 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1847 transitions. Word has length 102 [2022-11-16 11:43:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:10,170 INFO L495 AbstractCegarLoop]: Abstraction has 1359 states and 1847 transitions. [2022-11-16 11:43:10,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1847 transitions. [2022-11-16 11:43:10,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 11:43:10,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:10,174 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] [2022-11-16 11:43:10,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:43:10,174 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:10,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1757505246, now seen corresponding path program 1 times [2022-11-16 11:43:10,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:10,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605897599] [2022-11-16 11:43:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:10,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:10,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:43:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:10,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:43:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:10,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:43:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:10,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 11:43:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:10,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 11:43:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:10,342 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 11:43:10,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:10,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605897599] [2022-11-16 11:43:10,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605897599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:10,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:10,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:43:10,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186725898] [2022-11-16 11:43:10,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:10,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:43:10,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:10,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:43:10,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:10,344 INFO L87 Difference]: Start difference. First operand 1359 states and 1847 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:12,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:12,830 INFO L93 Difference]: Finished difference Result 2374 states and 3451 transitions. [2022-11-16 11:43:12,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:43:12,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-11-16 11:43:12,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:12,841 INFO L225 Difference]: With dead ends: 2374 [2022-11-16 11:43:12,841 INFO L226 Difference]: Without dead ends: 1978 [2022-11-16 11:43:12,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:43:12,844 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 882 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1946 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:12,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 1580 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1946 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 11:43:12,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-11-16 11:43:13,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1731. [2022-11-16 11:43:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1534 states have (on average 1.3872229465449804) internal successors, (2128), 1556 states have internal predecessors, (2128), 122 states have call successors, (122), 62 states have call predecessors, (122), 73 states have return successors, (172), 116 states have call predecessors, (172), 119 states have call successors, (172) [2022-11-16 11:43:13,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2422 transitions. [2022-11-16 11:43:13,089 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2422 transitions. Word has length 102 [2022-11-16 11:43:13,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:13,090 INFO L495 AbstractCegarLoop]: Abstraction has 1731 states and 2422 transitions. [2022-11-16 11:43:13,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:13,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2422 transitions. [2022-11-16 11:43:13,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 11:43:13,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:13,095 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] [2022-11-16 11:43:13,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:43:13,096 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:13,096 INFO L85 PathProgramCache]: Analyzing trace with hash -121625700, now seen corresponding path program 1 times [2022-11-16 11:43:13,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:13,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724278032] [2022-11-16 11:43:13,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:13,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:13,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:43:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:13,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:43:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:13,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:43:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:13,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 11:43:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:13,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 11:43:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:13,256 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 11:43:13,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724278032] [2022-11-16 11:43:13,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724278032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:13,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:13,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:43:13,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237008127] [2022-11-16 11:43:13,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:13,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:43:13,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:13,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:43:13,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:13,279 INFO L87 Difference]: Start difference. First operand 1731 states and 2422 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:14,567 INFO L93 Difference]: Finished difference Result 2749 states and 4045 transitions. [2022-11-16 11:43:14,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:43:14,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-11-16 11:43:14,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:14,583 INFO L225 Difference]: With dead ends: 2749 [2022-11-16 11:43:14,583 INFO L226 Difference]: Without dead ends: 1979 [2022-11-16 11:43:14,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:43:14,587 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 829 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:14,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 796 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:43:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-11-16 11:43:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1731. [2022-11-16 11:43:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1534 states have (on average 1.3839634941329857) internal successors, (2123), 1556 states have internal predecessors, (2123), 122 states have call successors, (122), 62 states have call predecessors, (122), 73 states have return successors, (172), 116 states have call predecessors, (172), 119 states have call successors, (172) [2022-11-16 11:43:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2417 transitions. [2022-11-16 11:43:14,836 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2417 transitions. Word has length 102 [2022-11-16 11:43:14,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:14,836 INFO L495 AbstractCegarLoop]: Abstraction has 1731 states and 2417 transitions. [2022-11-16 11:43:14,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:14,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2417 transitions. [2022-11-16 11:43:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 11:43:14,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:14,844 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] [2022-11-16 11:43:14,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:43:14,844 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:14,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:14,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1203230494, now seen corresponding path program 1 times [2022-11-16 11:43:14,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:14,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310687052] [2022-11-16 11:43:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:14,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:14,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:43:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:14,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:43:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:15,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:43:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:15,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 11:43:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:15,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 11:43:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:15,039 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 11:43:15,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:15,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310687052] [2022-11-16 11:43:15,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310687052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:15,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:15,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:43:15,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394894053] [2022-11-16 11:43:15,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:15,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:43:15,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:15,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:43:15,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:15,041 INFO L87 Difference]: Start difference. First operand 1731 states and 2417 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:17,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:17,490 INFO L93 Difference]: Finished difference Result 3699 states and 5504 transitions. [2022-11-16 11:43:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:43:17,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-11-16 11:43:17,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:17,503 INFO L225 Difference]: With dead ends: 3699 [2022-11-16 11:43:17,504 INFO L226 Difference]: Without dead ends: 2931 [2022-11-16 11:43:17,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:43:17,508 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 879 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1909 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:17,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1580 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1909 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 11:43:17,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2022-11-16 11:43:17,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2480. [2022-11-16 11:43:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2199 states have (on average 1.428831286948613) internal successors, (3142), 2225 states have internal predecessors, (3142), 178 states have call successors, (178), 86 states have call predecessors, (178), 101 states have return successors, (254), 176 states have call predecessors, (254), 175 states have call successors, (254) [2022-11-16 11:43:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 3574 transitions. [2022-11-16 11:43:17,901 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 3574 transitions. Word has length 102 [2022-11-16 11:43:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:17,901 INFO L495 AbstractCegarLoop]: Abstraction has 2480 states and 3574 transitions. [2022-11-16 11:43:17,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 3574 transitions. [2022-11-16 11:43:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 11:43:17,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:17,906 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] [2022-11-16 11:43:17,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:43:17,907 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:17,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1524978852, now seen corresponding path program 1 times [2022-11-16 11:43:17,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:17,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738502471] [2022-11-16 11:43:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:17,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:17,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:43:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:17,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:43:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:18,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:43:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:18,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 11:43:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:18,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 11:43:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:18,067 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 11:43:18,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:18,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738502471] [2022-11-16 11:43:18,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738502471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:18,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:18,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:43:18,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456774767] [2022-11-16 11:43:18,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:18,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:43:18,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:18,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:43:18,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:18,073 INFO L87 Difference]: Start difference. First operand 2480 states and 3574 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:20,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:20,707 INFO L93 Difference]: Finished difference Result 6356 states and 9661 transitions. [2022-11-16 11:43:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:43:20,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-11-16 11:43:20,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:20,774 INFO L225 Difference]: With dead ends: 6356 [2022-11-16 11:43:20,775 INFO L226 Difference]: Without dead ends: 4839 [2022-11-16 11:43:20,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:43:20,781 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 879 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1900 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:20,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1580 Invalid, 1974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1900 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 11:43:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2022-11-16 11:43:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 3985. [2022-11-16 11:43:21,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3985 states, 3536 states have (on average 1.467760180995475) internal successors, (5190), 3570 states have internal predecessors, (5190), 290 states have call successors, (290), 134 states have call predecessors, (290), 157 states have return successors, (436), 296 states have call predecessors, (436), 287 states have call successors, (436) [2022-11-16 11:43:21,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3985 states to 3985 states and 5916 transitions. [2022-11-16 11:43:21,382 INFO L78 Accepts]: Start accepts. Automaton has 3985 states and 5916 transitions. Word has length 102 [2022-11-16 11:43:21,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:21,382 INFO L495 AbstractCegarLoop]: Abstraction has 3985 states and 5916 transitions. [2022-11-16 11:43:21,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:21,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3985 states and 5916 transitions. [2022-11-16 11:43:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 11:43:21,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:21,390 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] [2022-11-16 11:43:21,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:43:21,391 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:21,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1712150366, now seen corresponding path program 1 times [2022-11-16 11:43:21,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:21,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716199295] [2022-11-16 11:43:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:21,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:21,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:43:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:21,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:43:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:21,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:43:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:21,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 11:43:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:21,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 11:43:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:21,587 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 11:43:21,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:21,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716199295] [2022-11-16 11:43:21,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716199295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:21,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:21,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:43:21,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377538947] [2022-11-16 11:43:21,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:21,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:43:21,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:21,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:43:21,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:21,589 INFO L87 Difference]: Start difference. First operand 3985 states and 5916 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:25,121 INFO L93 Difference]: Finished difference Result 12933 states and 19923 transitions. [2022-11-16 11:43:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:43:25,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-11-16 11:43:25,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:25,181 INFO L225 Difference]: With dead ends: 12933 [2022-11-16 11:43:25,182 INFO L226 Difference]: Without dead ends: 9911 [2022-11-16 11:43:25,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:43:25,197 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 1094 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:25,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 1574 Invalid, 1964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 11:43:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9911 states. [2022-11-16 11:43:26,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9911 to 6962. [2022-11-16 11:43:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 6193 states have (on average 1.4978201194897465) internal successors, (9276), 6243 states have internal predecessors, (9276), 498 states have call successors, (498), 230 states have call predecessors, (498), 269 states have return successors, (838), 520 states have call predecessors, (838), 495 states have call successors, (838) [2022-11-16 11:43:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 10612 transitions. [2022-11-16 11:43:26,140 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 10612 transitions. Word has length 102 [2022-11-16 11:43:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:26,141 INFO L495 AbstractCegarLoop]: Abstraction has 6962 states and 10612 transitions. [2022-11-16 11:43:26,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 10612 transitions. [2022-11-16 11:43:26,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 11:43:26,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:26,150 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] [2022-11-16 11:43:26,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:43:26,150 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:26,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:26,151 INFO L85 PathProgramCache]: Analyzing trace with hash 569647900, now seen corresponding path program 1 times [2022-11-16 11:43:26,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:26,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213077049] [2022-11-16 11:43:26,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:26,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:26,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:43:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:26,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:43:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:26,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:43:26,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:26,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 11:43:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:26,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 11:43:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:26,289 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 11:43:26,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:26,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213077049] [2022-11-16 11:43:26,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213077049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:26,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:26,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:43:26,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574607838] [2022-11-16 11:43:26,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:26,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:43:26,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:26,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:43:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:26,293 INFO L87 Difference]: Start difference. First operand 6962 states and 10612 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:28,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:28,230 INFO L93 Difference]: Finished difference Result 14664 states and 22986 transitions. [2022-11-16 11:43:28,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:43:28,231 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-11-16 11:43:28,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:28,274 INFO L225 Difference]: With dead ends: 14664 [2022-11-16 11:43:28,274 INFO L226 Difference]: Without dead ends: 8663 [2022-11-16 11:43:28,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:43:28,297 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 834 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:28,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 794 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:43:28,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8663 states. [2022-11-16 11:43:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8663 to 6962. [2022-11-16 11:43:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 6193 states have (on average 1.4924915226869047) internal successors, (9243), 6243 states have internal predecessors, (9243), 498 states have call successors, (498), 230 states have call predecessors, (498), 269 states have return successors, (838), 520 states have call predecessors, (838), 495 states have call successors, (838) [2022-11-16 11:43:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 10579 transitions. [2022-11-16 11:43:29,286 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 10579 transitions. Word has length 102 [2022-11-16 11:43:29,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:29,286 INFO L495 AbstractCegarLoop]: Abstraction has 6962 states and 10579 transitions. [2022-11-16 11:43:29,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:29,286 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 10579 transitions. [2022-11-16 11:43:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 11:43:29,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:29,296 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] [2022-11-16 11:43:29,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:43:29,297 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:29,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:29,297 INFO L85 PathProgramCache]: Analyzing trace with hash 809887646, now seen corresponding path program 1 times [2022-11-16 11:43:29,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:29,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972891056] [2022-11-16 11:43:29,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:29,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:29,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:43:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:29,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:43:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:29,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:43:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:29,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 11:43:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:29,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 11:43:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:29,462 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 11:43:29,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:29,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972891056] [2022-11-16 11:43:29,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972891056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:29,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:29,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:43:29,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842812479] [2022-11-16 11:43:29,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:29,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:43:29,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:29,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:43:29,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:29,465 INFO L87 Difference]: Start difference. First operand 6962 states and 10579 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:33,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:33,739 INFO L93 Difference]: Finished difference Result 23366 states and 36411 transitions. [2022-11-16 11:43:33,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:43:33,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-11-16 11:43:33,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:33,821 INFO L225 Difference]: With dead ends: 23366 [2022-11-16 11:43:33,821 INFO L226 Difference]: Without dead ends: 17367 [2022-11-16 11:43:33,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:43:33,848 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 914 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:33,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 1574 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2013 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 11:43:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17367 states. [2022-11-16 11:43:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17367 to 12962. [2022-11-16 11:43:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12962 states, 11569 states have (on average 1.5119716483706458) internal successors, (17492), 11651 states have internal predecessors, (17492), 898 states have call successors, (898), 422 states have call predecessors, (898), 493 states have return successors, (1788), 952 states have call predecessors, (1788), 895 states have call successors, (1788) [2022-11-16 11:43:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12962 states to 12962 states and 20178 transitions. [2022-11-16 11:43:35,357 INFO L78 Accepts]: Start accepts. Automaton has 12962 states and 20178 transitions. Word has length 102 [2022-11-16 11:43:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:35,357 INFO L495 AbstractCegarLoop]: Abstraction has 12962 states and 20178 transitions. [2022-11-16 11:43:35,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 12962 states and 20178 transitions. [2022-11-16 11:43:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 11:43:35,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:35,371 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] [2022-11-16 11:43:35,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 11:43:35,372 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:35,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:35,372 INFO L85 PathProgramCache]: Analyzing trace with hash 836953248, now seen corresponding path program 1 times [2022-11-16 11:43:35,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:35,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807547373] [2022-11-16 11:43:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:35,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:35,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:43:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:35,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:43:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:35,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:43:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:35,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 11:43:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:35,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 11:43:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:35,521 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 11:43:35,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:35,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807547373] [2022-11-16 11:43:35,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807547373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:35,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:35,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:43:35,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314341266] [2022-11-16 11:43:35,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:35,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:43:35,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:35,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:43:35,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:35,524 INFO L87 Difference]: Start difference. First operand 12962 states and 20178 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:41,650 INFO L93 Difference]: Finished difference Result 44566 states and 70622 transitions. [2022-11-16 11:43:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:43:41,650 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-11-16 11:43:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:41,802 INFO L225 Difference]: With dead ends: 44566 [2022-11-16 11:43:41,802 INFO L226 Difference]: Without dead ends: 32567 [2022-11-16 11:43:41,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:43:41,840 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 951 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:41,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 1574 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1792 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 11:43:41,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32567 states. [2022-11-16 11:43:44,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32567 to 24930. [2022-11-16 11:43:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24930 states, 22321 states have (on average 1.5242148649254066) internal successors, (34022), 22467 states have internal predecessors, (34022), 1666 states have call successors, (1666), 806 states have call predecessors, (1666), 941 states have return successors, (4142), 1784 states have call predecessors, (4142), 1663 states have call successors, (4142) [2022-11-16 11:43:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24930 states to 24930 states and 39830 transitions. [2022-11-16 11:43:44,530 INFO L78 Accepts]: Start accepts. Automaton has 24930 states and 39830 transitions. Word has length 102 [2022-11-16 11:43:44,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:44,530 INFO L495 AbstractCegarLoop]: Abstraction has 24930 states and 39830 transitions. [2022-11-16 11:43:44,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:44,530 INFO L276 IsEmpty]: Start isEmpty. Operand 24930 states and 39830 transitions. [2022-11-16 11:43:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 11:43:44,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:44,553 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] [2022-11-16 11:43:44,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:43:44,554 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:44,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1240383650, now seen corresponding path program 1 times [2022-11-16 11:43:44,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:44,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645988389] [2022-11-16 11:43:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:44,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:44,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:43:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:44,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:43:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:44,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:43:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:44,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 11:43:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:44,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 11:43:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:44,720 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 11:43:44,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:44,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645988389] [2022-11-16 11:43:44,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645988389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:44,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:44,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:43:44,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820747439] [2022-11-16 11:43:44,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:44,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:43:44,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:44,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:43:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:44,723 INFO L87 Difference]: Start difference. First operand 24930 states and 39830 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:43:54,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:54,718 INFO L93 Difference]: Finished difference Result 85782 states and 139100 transitions. [2022-11-16 11:43:54,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:43:54,719 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-11-16 11:43:54,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:55,053 INFO L225 Difference]: With dead ends: 85782 [2022-11-16 11:43:55,054 INFO L226 Difference]: Without dead ends: 61815 [2022-11-16 11:43:55,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:43:55,146 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 910 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:55,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 1574 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1777 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 11:43:55,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61815 states. [2022-11-16 11:44:01,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61815 to 48802. [2022-11-16 11:44:01,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48802 states, 43825 states have (on average 1.5321391899600685) internal successors, (67146), 44099 states have internal predecessors, (67146), 3138 states have call successors, (3138), 1574 states have call predecessors, (3138), 1837 states have return successors, (10244), 3384 states have call predecessors, (10244), 3135 states have call successors, (10244) [2022-11-16 11:44:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48802 states to 48802 states and 80528 transitions. [2022-11-16 11:44:01,376 INFO L78 Accepts]: Start accepts. Automaton has 48802 states and 80528 transitions. Word has length 102 [2022-11-16 11:44:01,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:01,376 INFO L495 AbstractCegarLoop]: Abstraction has 48802 states and 80528 transitions. [2022-11-16 11:44:01,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:44:01,377 INFO L276 IsEmpty]: Start isEmpty. Operand 48802 states and 80528 transitions. [2022-11-16 11:44:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 11:44:01,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:01,421 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] [2022-11-16 11:44:01,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 11:44:01,421 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:44:01,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:01,421 INFO L85 PathProgramCache]: Analyzing trace with hash 493720800, now seen corresponding path program 1 times [2022-11-16 11:44:01,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:01,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259294566] [2022-11-16 11:44:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:01,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:01,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:44:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:01,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-16 11:44:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:01,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-16 11:44:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:01,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-16 11:44:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:01,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-16 11:44:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:01,536 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 11:44:01,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:01,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259294566] [2022-11-16 11:44:01,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259294566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:44:01,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:44:01,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:44:01,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348343817] [2022-11-16 11:44:01,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:44:01,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:44:01,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:01,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:44:01,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:44:01,539 INFO L87 Difference]: Start difference. First operand 48802 states and 80528 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)