./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label44.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_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/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_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label44.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/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_bb3d9342-112c-4272-8c4c-8e57403baa98/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 37cccb3bf38aef2358990f5bb72c991902624e4b903b7b6aaef89921bb90a94d --- 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 11:10:49,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:10:49,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:10:49,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:10:49,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:10:49,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:10:49,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:10:49,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:10:49,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:10:49,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:10:49,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:10:49,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:10:49,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:10:49,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:10:49,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:10:49,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:10:49,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:10:49,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:10:49,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:10:49,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:10:49,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:10:49,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:10:49,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:10:49,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:10:49,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:10:49,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:10:49,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:10:49,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:10:49,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:10:49,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:10:49,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:10:49,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:10:49,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:10:49,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:10:49,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:10:49,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:10:49,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:10:49,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:10:49,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:10:49,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:10:49,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:10:49,582 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:10:49,619 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:10:49,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:10:49,623 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:10:49,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:10:49,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:10:49,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:10:49,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:10:49,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:10:49,626 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:10:49,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:10:49,627 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:10:49,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:10:49,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:10:49,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:10:49,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:10:49,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:10:49,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:10:49,629 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:10:49,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:10:49,630 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:10:49,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:10:49,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:10:49,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:10:49,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:10:49,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:10:49,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:10:49,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:10:49,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:10:49,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:10:49,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:10:49,633 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:10:49,633 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:10:49,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:10:49,634 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_bb3d9342-112c-4272-8c4c-8e57403baa98/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37cccb3bf38aef2358990f5bb72c991902624e4b903b7b6aaef89921bb90a94d [2022-11-16 11:10:49,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:10:49,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:10:49,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:10:50,000 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:10:50,001 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:10:50,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/eca-rers2012/Problem03_label44.c [2022-11-16 11:10:50,070 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/data/00c12fca3/cd42f4204981425d9d376180af7ef078/FLAG459de00ce [2022-11-16 11:10:50,717 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:10:50,718 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/sv-benchmarks/c/eca-rers2012/Problem03_label44.c [2022-11-16 11:10:50,738 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/data/00c12fca3/cd42f4204981425d9d376180af7ef078/FLAG459de00ce [2022-11-16 11:10:50,933 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/data/00c12fca3/cd42f4204981425d9d376180af7ef078 [2022-11-16 11:10:50,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:10:50,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:10:50,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:10:50,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:10:50,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:10:50,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:10:50" (1/1) ... [2022-11-16 11:10:50,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1deecc9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:50, skipping insertion in model container [2022-11-16 11:10:50,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:10:50" (1/1) ... [2022-11-16 11:10:50,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:10:51,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:10:51,682 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_bb3d9342-112c-4272-8c4c-8e57403baa98/sv-benchmarks/c/eca-rers2012/Problem03_label44.c[58121,58134] [2022-11-16 11:10:51,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:10:51,739 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:10:52,022 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_bb3d9342-112c-4272-8c4c-8e57403baa98/sv-benchmarks/c/eca-rers2012/Problem03_label44.c[58121,58134] [2022-11-16 11:10:52,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:10:52,064 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:10:52,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:52 WrapperNode [2022-11-16 11:10:52,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:10:52,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:10:52,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:10:52,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:10:52,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:52" (1/1) ... [2022-11-16 11:10:52,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:52" (1/1) ... [2022-11-16 11:10:52,224 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-16 11:10:52,224 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:10:52,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:10:52,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:10:52,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:10:52,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:52" (1/1) ... [2022-11-16 11:10:52,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:52" (1/1) ... [2022-11-16 11:10:52,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:52" (1/1) ... [2022-11-16 11:10:52,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:52" (1/1) ... [2022-11-16 11:10:52,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:52" (1/1) ... [2022-11-16 11:10:52,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:52" (1/1) ... [2022-11-16 11:10:52,331 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:52" (1/1) ... [2022-11-16 11:10:52,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:52" (1/1) ... [2022-11-16 11:10:52,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:10:52,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:10:52,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:10:52,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:10:52,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:52" (1/1) ... [2022-11-16 11:10:52,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:10:52,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:52,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:10:52,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:10:52,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:10:52,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:10:52,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:10:52,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:10:52,552 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:10:52,576 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:10:54,495 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:10:54,514 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:10:54,514 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:10:54,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:10:54 BoogieIcfgContainer [2022-11-16 11:10:54,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:10:54,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:10:54,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:10:54,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:10:54,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:10:50" (1/3) ... [2022-11-16 11:10:54,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb857f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:10:54, skipping insertion in model container [2022-11-16 11:10:54,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:10:52" (2/3) ... [2022-11-16 11:10:54,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb857f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:10:54, skipping insertion in model container [2022-11-16 11:10:54,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:10:54" (3/3) ... [2022-11-16 11:10:54,529 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label44.c [2022-11-16 11:10:54,548 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:10:54,548 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:10:54,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:10:54,639 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;@19e4289e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:10:54,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:10:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-16 11:10:54,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:54,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:54,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:54,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:54,679 INFO L85 PathProgramCache]: Analyzing trace with hash 302925243, now seen corresponding path program 1 times [2022-11-16 11:10:54,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:54,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244262196] [2022-11-16 11:10:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:54,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:55,760 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 11:10:55,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:55,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244262196] [2022-11-16 11:10:55,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244262196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:10:55,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:10:55,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:10:55,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199308309] [2022-11-16 11:10:55,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:10:55,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:10:55,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:55,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:10:55,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:10:55,812 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:57,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:57,144 INFO L93 Difference]: Finished difference Result 855 states and 1496 transitions. [2022-11-16 11:10:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:10:57,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2022-11-16 11:10:57,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:57,168 INFO L225 Difference]: With dead ends: 855 [2022-11-16 11:10:57,168 INFO L226 Difference]: Without dead ends: 460 [2022-11-16 11:10:57,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:10:57,196 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 119 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:57,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 176 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:10:57,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-16 11:10:57,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 459. [2022-11-16 11:10:57,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.5502183406113537) internal successors, (710), 458 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 710 transitions. [2022-11-16 11:10:57,294 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 710 transitions. Word has length 177 [2022-11-16 11:10:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:57,295 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 710 transitions. [2022-11-16 11:10:57,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 710 transitions. [2022-11-16 11:10:57,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-16 11:10:57,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:57,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:57,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:10:57,301 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:57,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:57,302 INFO L85 PathProgramCache]: Analyzing trace with hash -2005485845, now seen corresponding path program 1 times [2022-11-16 11:10:57,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:57,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147089503] [2022-11-16 11:10:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:57,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:57,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:57,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147089503] [2022-11-16 11:10:57,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147089503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:10:57,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:10:57,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:10:57,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558401183] [2022-11-16 11:10:57,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:10:57,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:10:57,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:57,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:10:57,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:10:57,685 INFO L87 Difference]: Start difference. First operand 459 states and 710 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:58,669 INFO L93 Difference]: Finished difference Result 1342 states and 2082 transitions. [2022-11-16 11:10:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:10:58,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-16 11:10:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:58,675 INFO L225 Difference]: With dead ends: 1342 [2022-11-16 11:10:58,675 INFO L226 Difference]: Without dead ends: 885 [2022-11-16 11:10:58,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:10:58,678 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:58,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 181 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:10:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-11-16 11:10:58,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 880. [2022-11-16 11:10:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 1.4687144482366326) internal successors, (1291), 879 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1291 transitions. [2022-11-16 11:10:58,725 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1291 transitions. Word has length 182 [2022-11-16 11:10:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:58,726 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1291 transitions. [2022-11-16 11:10:58,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:58,726 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1291 transitions. [2022-11-16 11:10:58,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-16 11:10:58,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:58,732 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:58,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:10:58,732 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:58,733 INFO L85 PathProgramCache]: Analyzing trace with hash -23446020, now seen corresponding path program 1 times [2022-11-16 11:10:58,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:58,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225217088] [2022-11-16 11:10:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:58,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:58,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:58,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225217088] [2022-11-16 11:10:58,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225217088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:10:58,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:10:58,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:10:58,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436112816] [2022-11-16 11:10:58,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:10:58,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:10:58,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:58,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:10:58,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:10:58,961 INFO L87 Difference]: Start difference. First operand 880 states and 1291 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:59,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:59,952 INFO L93 Difference]: Finished difference Result 2594 states and 3822 transitions. [2022-11-16 11:10:59,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:10:59,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2022-11-16 11:10:59,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:59,959 INFO L225 Difference]: With dead ends: 2594 [2022-11-16 11:10:59,959 INFO L226 Difference]: Without dead ends: 1716 [2022-11-16 11:10:59,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:10:59,962 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:59,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:10:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-11-16 11:10:59,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1696. [2022-11-16 11:10:59,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 1.4395280235988202) internal successors, (2440), 1695 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2440 transitions. [2022-11-16 11:11:00,005 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2440 transitions. Word has length 185 [2022-11-16 11:11:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:00,006 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 2440 transitions. [2022-11-16 11:11:00,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:00,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2440 transitions. [2022-11-16 11:11:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-16 11:11:00,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:00,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:00,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:11:00,012 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:00,013 INFO L85 PathProgramCache]: Analyzing trace with hash 372513201, now seen corresponding path program 1 times [2022-11-16 11:11:00,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:00,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494198053] [2022-11-16 11:11:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:00,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:11:00,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:00,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494198053] [2022-11-16 11:11:00,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494198053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:00,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:11:00,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:11:00,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792922273] [2022-11-16 11:11:00,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:00,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:11:00,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:00,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:11:00,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:11:00,806 INFO L87 Difference]: Start difference. First operand 1696 states and 2440 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:01,970 INFO L93 Difference]: Finished difference Result 3531 states and 5130 transitions. [2022-11-16 11:11:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:11:01,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-11-16 11:11:01,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:01,976 INFO L225 Difference]: With dead ends: 3531 [2022-11-16 11:11:01,977 INFO L226 Difference]: Without dead ends: 1663 [2022-11-16 11:11:01,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:11:01,980 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 300 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:01,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 47 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:11:01,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2022-11-16 11:11:02,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1663. [2022-11-16 11:11:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 1.325511432009627) internal successors, (2203), 1662 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2203 transitions. [2022-11-16 11:11:02,018 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2203 transitions. Word has length 192 [2022-11-16 11:11:02,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:02,019 INFO L495 AbstractCegarLoop]: Abstraction has 1663 states and 2203 transitions. [2022-11-16 11:11:02,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2203 transitions. [2022-11-16 11:11:02,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-16 11:11:02,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:02,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:02,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:11:02,025 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:02,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:02,025 INFO L85 PathProgramCache]: Analyzing trace with hash 146400972, now seen corresponding path program 1 times [2022-11-16 11:11:02,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:02,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681295125] [2022-11-16 11:11:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:02,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:02,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:02,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681295125] [2022-11-16 11:11:02,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681295125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:02,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:11:02,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:11:02,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619843114] [2022-11-16 11:11:02,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:02,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:11:02,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:02,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:11:02,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:11:02,820 INFO L87 Difference]: Start difference. First operand 1663 states and 2203 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:04,241 INFO L93 Difference]: Finished difference Result 4323 states and 5743 transitions. [2022-11-16 11:11:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:11:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2022-11-16 11:11:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:04,251 INFO L225 Difference]: With dead ends: 4323 [2022-11-16 11:11:04,251 INFO L226 Difference]: Without dead ends: 2488 [2022-11-16 11:11:04,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:11:04,258 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 195 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:04,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 94 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:11:04,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2022-11-16 11:11:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2487. [2022-11-16 11:11:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 1.3085277554304102) internal successors, (3253), 2486 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3253 transitions. [2022-11-16 11:11:04,314 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3253 transitions. Word has length 208 [2022-11-16 11:11:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:04,315 INFO L495 AbstractCegarLoop]: Abstraction has 2487 states and 3253 transitions. [2022-11-16 11:11:04,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:04,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3253 transitions. [2022-11-16 11:11:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-16 11:11:04,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:04,321 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:04,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:11:04,322 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:04,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:04,323 INFO L85 PathProgramCache]: Analyzing trace with hash -459963951, now seen corresponding path program 1 times [2022-11-16 11:11:04,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:04,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840465470] [2022-11-16 11:11:04,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:04,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:11:04,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:04,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840465470] [2022-11-16 11:11:04,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840465470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:04,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:11:04,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:11:04,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348662046] [2022-11-16 11:11:04,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:04,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:04,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:04,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:04,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:04,767 INFO L87 Difference]: Start difference. First operand 2487 states and 3253 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:05,608 INFO L93 Difference]: Finished difference Result 7433 states and 9727 transitions. [2022-11-16 11:11:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:05,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2022-11-16 11:11:05,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:05,624 INFO L225 Difference]: With dead ends: 7433 [2022-11-16 11:11:05,624 INFO L226 Difference]: Without dead ends: 4948 [2022-11-16 11:11:05,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:05,628 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 206 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:05,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 62 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:11:05,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2022-11-16 11:11:05,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 4937. [2022-11-16 11:11:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4936 states have (on average 1.2884927066450567) internal successors, (6360), 4936 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 6360 transitions. [2022-11-16 11:11:05,727 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 6360 transitions. Word has length 210 [2022-11-16 11:11:05,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:05,728 INFO L495 AbstractCegarLoop]: Abstraction has 4937 states and 6360 transitions. [2022-11-16 11:11:05,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:05,729 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 6360 transitions. [2022-11-16 11:11:05,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-16 11:11:05,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:05,737 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:05,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:11:05,738 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:05,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:05,739 INFO L85 PathProgramCache]: Analyzing trace with hash -145510537, now seen corresponding path program 1 times [2022-11-16 11:11:05,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:05,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608196015] [2022-11-16 11:11:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:05,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:06,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608196015] [2022-11-16 11:11:06,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608196015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175325484] [2022-11-16 11:11:06,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:06,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:06,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:06,210 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:06,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:11:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:06,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:11:06,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 11:11:06,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:11:06,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175325484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:06,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:11:06,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-16 11:11:06,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9468536] [2022-11-16 11:11:06,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:06,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:06,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:06,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:06,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:11:06,900 INFO L87 Difference]: Start difference. First operand 4937 states and 6360 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:07,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:07,825 INFO L93 Difference]: Finished difference Result 9884 states and 12740 transitions. [2022-11-16 11:11:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:07,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2022-11-16 11:11:07,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:07,842 INFO L225 Difference]: With dead ends: 9884 [2022-11-16 11:11:07,843 INFO L226 Difference]: Without dead ends: 4949 [2022-11-16 11:11:07,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:11:07,849 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 47 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:07,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 307 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:11:07,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4949 states. [2022-11-16 11:11:07,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4949 to 4937. [2022-11-16 11:11:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4936 states have (on average 1.2710696920583469) internal successors, (6274), 4936 states have internal predecessors, (6274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 6274 transitions. [2022-11-16 11:11:07,982 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 6274 transitions. Word has length 215 [2022-11-16 11:11:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:07,983 INFO L495 AbstractCegarLoop]: Abstraction has 4937 states and 6274 transitions. [2022-11-16 11:11:07,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 6274 transitions. [2022-11-16 11:11:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-16 11:11:07,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:07,995 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:08,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:08,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:08,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:08,202 INFO L85 PathProgramCache]: Analyzing trace with hash -71775401, now seen corresponding path program 1 times [2022-11-16 11:11:08,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:08,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410581146] [2022-11-16 11:11:08,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:08,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 64 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:11:08,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:08,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410581146] [2022-11-16 11:11:08,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410581146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:08,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069007905] [2022-11-16 11:11:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:08,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:08,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:08,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:08,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:11:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:09,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:11:09,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:11:09,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:11:09,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069007905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:09,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:11:09,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-16 11:11:09,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852499901] [2022-11-16 11:11:09,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:09,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:09,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:09,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:09,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:11:09,110 INFO L87 Difference]: Start difference. First operand 4937 states and 6274 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:09,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:09,378 INFO L93 Difference]: Finished difference Result 14805 states and 18816 transitions. [2022-11-16 11:11:09,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:09,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2022-11-16 11:11:09,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:09,429 INFO L225 Difference]: With dead ends: 14805 [2022-11-16 11:11:09,429 INFO L226 Difference]: Without dead ends: 9870 [2022-11-16 11:11:09,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:11:09,438 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 268 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:09,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 507 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:11:09,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9870 states. [2022-11-16 11:11:09,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9870 to 9868. [2022-11-16 11:11:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9868 states, 9867 states have (on average 1.2677612242829635) internal successors, (12509), 9867 states have internal predecessors, (12509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9868 states to 9868 states and 12509 transitions. [2022-11-16 11:11:09,647 INFO L78 Accepts]: Start accepts. Automaton has 9868 states and 12509 transitions. Word has length 232 [2022-11-16 11:11:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:09,647 INFO L495 AbstractCegarLoop]: Abstraction has 9868 states and 12509 transitions. [2022-11-16 11:11:09,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 9868 states and 12509 transitions. [2022-11-16 11:11:09,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-16 11:11:09,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:09,664 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:09,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:09,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:09,876 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:09,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:09,877 INFO L85 PathProgramCache]: Analyzing trace with hash -381195820, now seen corresponding path program 1 times [2022-11-16 11:11:09,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:09,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950955345] [2022-11-16 11:11:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:09,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 65 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 11:11:10,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:10,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950955345] [2022-11-16 11:11:10,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950955345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:10,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713004212] [2022-11-16 11:11:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:10,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:10,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:10,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:10,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:11:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:10,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:11:10,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 11:11:10,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:11:10,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713004212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:10,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:11:10,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-16 11:11:10,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457382430] [2022-11-16 11:11:10,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:10,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:10,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:10,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:10,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:11:10,994 INFO L87 Difference]: Start difference. First operand 9868 states and 12509 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:11,943 INFO L93 Difference]: Finished difference Result 28065 states and 35647 transitions. [2022-11-16 11:11:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:11,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2022-11-16 11:11:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:11,975 INFO L225 Difference]: With dead ends: 28065 [2022-11-16 11:11:11,976 INFO L226 Difference]: Without dead ends: 18199 [2022-11-16 11:11:11,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:11:11,989 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 42 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:11,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 342 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:11:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18199 states. [2022-11-16 11:11:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18199 to 18191. [2022-11-16 11:11:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18191 states, 18190 states have (on average 1.1650907091808687) internal successors, (21193), 18190 states have internal predecessors, (21193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:12,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18191 states to 18191 states and 21193 transitions. [2022-11-16 11:11:12,297 INFO L78 Accepts]: Start accepts. Automaton has 18191 states and 21193 transitions. Word has length 236 [2022-11-16 11:11:12,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:12,297 INFO L495 AbstractCegarLoop]: Abstraction has 18191 states and 21193 transitions. [2022-11-16 11:11:12,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 18191 states and 21193 transitions. [2022-11-16 11:11:12,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-16 11:11:12,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:12,324 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:11:12,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:12,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:12,530 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash 414829696, now seen corresponding path program 1 times [2022-11-16 11:11:12,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:12,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855289288] [2022-11-16 11:11:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:12,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:12,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:12,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855289288] [2022-11-16 11:11:12,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855289288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:12,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:11:12,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:11:12,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927924105] [2022-11-16 11:11:12,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:12,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:12,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:12,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:12,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:12,913 INFO L87 Difference]: Start difference. First operand 18191 states and 21193 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:13,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:13,829 INFO L93 Difference]: Finished difference Result 42876 states and 50739 transitions. [2022-11-16 11:11:13,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:13,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2022-11-16 11:11:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:13,873 INFO L225 Difference]: With dead ends: 42876 [2022-11-16 11:11:13,873 INFO L226 Difference]: Without dead ends: 24687 [2022-11-16 11:11:13,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:13,890 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 158 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:13,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 126 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:11:13,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24687 states. [2022-11-16 11:11:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24687 to 24687. [2022-11-16 11:11:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24687 states, 24686 states have (on average 1.1374868346431175) internal successors, (28080), 24686 states have internal predecessors, (28080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24687 states to 24687 states and 28080 transitions. [2022-11-16 11:11:14,340 INFO L78 Accepts]: Start accepts. Automaton has 24687 states and 28080 transitions. Word has length 236 [2022-11-16 11:11:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:14,341 INFO L495 AbstractCegarLoop]: Abstraction has 24687 states and 28080 transitions. [2022-11-16 11:11:14,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:14,341 INFO L276 IsEmpty]: Start isEmpty. Operand 24687 states and 28080 transitions. [2022-11-16 11:11:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-16 11:11:14,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:14,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:14,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:11:14,368 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:14,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:14,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1383255126, now seen corresponding path program 1 times [2022-11-16 11:11:14,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:14,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810503886] [2022-11-16 11:11:14,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:14,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:14,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:14,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810503886] [2022-11-16 11:11:14,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810503886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:14,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:11:14,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:11:14,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109834588] [2022-11-16 11:11:14,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:14,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:14,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:14,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:14,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:14,756 INFO L87 Difference]: Start difference. First operand 24687 states and 28080 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:15,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:15,754 INFO L93 Difference]: Finished difference Result 61609 states and 70213 transitions. [2022-11-16 11:11:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:15,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2022-11-16 11:11:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:15,809 INFO L225 Difference]: With dead ends: 61609 [2022-11-16 11:11:15,809 INFO L226 Difference]: Without dead ends: 37330 [2022-11-16 11:11:15,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:15,829 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 157 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:15,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 105 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:11:15,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37330 states. [2022-11-16 11:11:16,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37330 to 34657. [2022-11-16 11:11:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34657 states, 34656 states have (on average 1.143409510618652) internal successors, (39626), 34656 states have internal predecessors, (39626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34657 states to 34657 states and 39626 transitions. [2022-11-16 11:11:16,428 INFO L78 Accepts]: Start accepts. Automaton has 34657 states and 39626 transitions. Word has length 252 [2022-11-16 11:11:16,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:16,429 INFO L495 AbstractCegarLoop]: Abstraction has 34657 states and 39626 transitions. [2022-11-16 11:11:16,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 34657 states and 39626 transitions. [2022-11-16 11:11:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-11-16 11:11:16,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:16,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:16,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:11:16,454 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:16,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1143032390, now seen corresponding path program 1 times [2022-11-16 11:11:16,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:16,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336620900] [2022-11-16 11:11:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:16,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:16,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:16,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336620900] [2022-11-16 11:11:16,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336620900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:16,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:11:16,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:11:16,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243002894] [2022-11-16 11:11:16,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:16,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:16,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:16,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:16,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:16,737 INFO L87 Difference]: Start difference. First operand 34657 states and 39626 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:18,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:18,071 INFO L93 Difference]: Finished difference Result 81922 states and 93790 transitions. [2022-11-16 11:11:18,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:18,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2022-11-16 11:11:18,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:18,144 INFO L225 Difference]: With dead ends: 81922 [2022-11-16 11:11:18,144 INFO L226 Difference]: Without dead ends: 48079 [2022-11-16 11:11:18,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:18,171 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 58 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:18,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 302 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:11:18,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48079 states. [2022-11-16 11:11:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48079 to 48067. [2022-11-16 11:11:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48067 states, 48066 states have (on average 1.1245995090084466) internal successors, (54055), 48066 states have internal predecessors, (54055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48067 states to 48067 states and 54055 transitions. [2022-11-16 11:11:19,130 INFO L78 Accepts]: Start accepts. Automaton has 48067 states and 54055 transitions. Word has length 273 [2022-11-16 11:11:19,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:19,131 INFO L495 AbstractCegarLoop]: Abstraction has 48067 states and 54055 transitions. [2022-11-16 11:11:19,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:19,131 INFO L276 IsEmpty]: Start isEmpty. Operand 48067 states and 54055 transitions. [2022-11-16 11:11:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-11-16 11:11:19,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:19,166 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:11:19,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:11:19,166 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:19,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:19,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2060000917, now seen corresponding path program 1 times [2022-11-16 11:11:19,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:19,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730895520] [2022-11-16 11:11:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:19,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-16 11:11:19,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:19,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730895520] [2022-11-16 11:11:19,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730895520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:19,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658617413] [2022-11-16 11:11:19,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:19,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:19,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:19,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:19,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:11:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:19,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:11:19,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-16 11:11:20,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:11:20,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658617413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:20,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:11:20,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-16 11:11:20,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385124049] [2022-11-16 11:11:20,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:20,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:20,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:20,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:20,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:11:20,323 INFO L87 Difference]: Start difference. First operand 48067 states and 54055 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:21,385 INFO L93 Difference]: Finished difference Result 95125 states and 107055 transitions. [2022-11-16 11:11:21,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:21,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2022-11-16 11:11:21,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:21,432 INFO L225 Difference]: With dead ends: 95125 [2022-11-16 11:11:21,432 INFO L226 Difference]: Without dead ends: 47872 [2022-11-16 11:11:21,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:11:21,462 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 86 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:21,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 277 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:11:21,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47872 states. [2022-11-16 11:11:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47872 to 47458. [2022-11-16 11:11:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47458 states, 47457 states have (on average 1.1174958383378637) internal successors, (53033), 47457 states have internal predecessors, (53033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47458 states to 47458 states and 53033 transitions. [2022-11-16 11:11:22,242 INFO L78 Accepts]: Start accepts. Automaton has 47458 states and 53033 transitions. Word has length 288 [2022-11-16 11:11:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:22,242 INFO L495 AbstractCegarLoop]: Abstraction has 47458 states and 53033 transitions. [2022-11-16 11:11:22,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 47458 states and 53033 transitions. [2022-11-16 11:11:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-16 11:11:22,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:22,280 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:22,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 11:11:22,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:11:22,486 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:22,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1333397972, now seen corresponding path program 1 times [2022-11-16 11:11:22,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:22,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121957534] [2022-11-16 11:11:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:22,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-16 11:11:22,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:22,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121957534] [2022-11-16 11:11:22,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121957534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:22,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:11:22,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:11:22,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832584982] [2022-11-16 11:11:22,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:22,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:22,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:22,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:22,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:22,775 INFO L87 Difference]: Start difference. First operand 47458 states and 53033 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:23,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:23,907 INFO L93 Difference]: Finished difference Result 87966 states and 98185 transitions. [2022-11-16 11:11:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:23,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 326 [2022-11-16 11:11:23,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:23,951 INFO L225 Difference]: With dead ends: 87966 [2022-11-16 11:11:23,952 INFO L226 Difference]: Without dead ends: 41322 [2022-11-16 11:11:23,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:23,975 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 224 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:23,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 303 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:11:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41322 states. [2022-11-16 11:11:24,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41322 to 39696. [2022-11-16 11:11:24,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39696 states, 39695 states have (on average 1.092631313767477) internal successors, (43372), 39695 states have internal predecessors, (43372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39696 states to 39696 states and 43372 transitions. [2022-11-16 11:11:24,808 INFO L78 Accepts]: Start accepts. Automaton has 39696 states and 43372 transitions. Word has length 326 [2022-11-16 11:11:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:24,809 INFO L495 AbstractCegarLoop]: Abstraction has 39696 states and 43372 transitions. [2022-11-16 11:11:24,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 39696 states and 43372 transitions. [2022-11-16 11:11:24,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-11-16 11:11:24,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:24,839 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:11:24,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:11:24,840 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:24,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:24,840 INFO L85 PathProgramCache]: Analyzing trace with hash 302232853, now seen corresponding path program 1 times [2022-11-16 11:11:24,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:24,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168075632] [2022-11-16 11:11:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:24,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 154 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:27,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:27,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168075632] [2022-11-16 11:11:27,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168075632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:27,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703141547] [2022-11-16 11:11:27,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:27,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:27,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:27,103 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:27,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:11:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:27,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:11:27,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:27,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:11:27,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703141547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:27,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:11:27,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-16 11:11:27,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347957459] [2022-11-16 11:11:27,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:27,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:11:27,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:27,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:11:27,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:11:27,783 INFO L87 Difference]: Start difference. First operand 39696 states and 43372 transitions. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:29,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:29,204 INFO L93 Difference]: Finished difference Result 91403 states and 100131 transitions. [2022-11-16 11:11:29,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:11:29,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 332 [2022-11-16 11:11:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:29,247 INFO L225 Difference]: With dead ends: 91403 [2022-11-16 11:11:29,247 INFO L226 Difference]: Without dead ends: 52724 [2022-11-16 11:11:29,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:11:29,270 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 412 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:29,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 108 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:11:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52724 states. [2022-11-16 11:11:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52724 to 52079. [2022-11-16 11:11:29,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52079 states, 52078 states have (on average 1.0798993816966858) internal successors, (56239), 52078 states have internal predecessors, (56239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52079 states to 52079 states and 56239 transitions. [2022-11-16 11:11:30,036 INFO L78 Accepts]: Start accepts. Automaton has 52079 states and 56239 transitions. Word has length 332 [2022-11-16 11:11:30,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:30,036 INFO L495 AbstractCegarLoop]: Abstraction has 52079 states and 56239 transitions. [2022-11-16 11:11:30,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 52079 states and 56239 transitions. [2022-11-16 11:11:30,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-11-16 11:11:30,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:30,076 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:11:30,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:30,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:11:30,277 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:30,278 INFO L85 PathProgramCache]: Analyzing trace with hash -32862139, now seen corresponding path program 1 times [2022-11-16 11:11:30,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:30,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622835096] [2022-11-16 11:11:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:30,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-16 11:11:30,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:30,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622835096] [2022-11-16 11:11:30,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622835096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:30,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382231680] [2022-11-16 11:11:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:30,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:30,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:30,969 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:30,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:11:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:31,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:11:31,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:11:31,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:11:31,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382231680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:31,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:11:31,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-16 11:11:31,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815270127] [2022-11-16 11:11:31,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:31,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:31,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:31,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:31,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:11:31,578 INFO L87 Difference]: Start difference. First operand 52079 states and 56239 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:32,521 INFO L93 Difference]: Finished difference Result 99484 states and 107571 transitions. [2022-11-16 11:11:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:32,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2022-11-16 11:11:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:32,574 INFO L225 Difference]: With dead ends: 99484 [2022-11-16 11:11:32,575 INFO L226 Difference]: Without dead ends: 48422 [2022-11-16 11:11:32,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:11:32,600 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 109 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:32,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 293 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:11:32,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48422 states. [2022-11-16 11:11:33,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48422 to 45166. [2022-11-16 11:11:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45166 states, 45165 states have (on average 1.066423115244105) internal successors, (48165), 45165 states have internal predecessors, (48165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45166 states to 45166 states and 48165 transitions. [2022-11-16 11:11:33,305 INFO L78 Accepts]: Start accepts. Automaton has 45166 states and 48165 transitions. Word has length 345 [2022-11-16 11:11:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:33,306 INFO L495 AbstractCegarLoop]: Abstraction has 45166 states and 48165 transitions. [2022-11-16 11:11:33,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 45166 states and 48165 transitions. [2022-11-16 11:11:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-16 11:11:33,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:33,328 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:33,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:33,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:11:33,530 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:33,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:33,531 INFO L85 PathProgramCache]: Analyzing trace with hash -985881480, now seen corresponding path program 1 times [2022-11-16 11:11:33,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:33,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085676251] [2022-11-16 11:11:33,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:33,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 11:11:34,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:34,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085676251] [2022-11-16 11:11:34,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085676251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:34,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:11:34,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:11:34,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786514239] [2022-11-16 11:11:34,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:34,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:34,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:34,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:34,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:34,396 INFO L87 Difference]: Start difference. First operand 45166 states and 48165 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:35,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:35,281 INFO L93 Difference]: Finished difference Result 89520 states and 95488 transitions. [2022-11-16 11:11:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:35,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 359 [2022-11-16 11:11:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:35,328 INFO L225 Difference]: With dead ends: 89520 [2022-11-16 11:11:35,328 INFO L226 Difference]: Without dead ends: 45371 [2022-11-16 11:11:35,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:35,352 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:35,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 127 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:11:35,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45371 states. [2022-11-16 11:11:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45371 to 45369. [2022-11-16 11:11:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45369 states, 45368 states have (on average 1.0662801974960325) internal successors, (48375), 45368 states have internal predecessors, (48375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45369 states to 45369 states and 48375 transitions. [2022-11-16 11:11:36,128 INFO L78 Accepts]: Start accepts. Automaton has 45369 states and 48375 transitions. Word has length 359 [2022-11-16 11:11:36,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:36,128 INFO L495 AbstractCegarLoop]: Abstraction has 45369 states and 48375 transitions. [2022-11-16 11:11:36,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:36,128 INFO L276 IsEmpty]: Start isEmpty. Operand 45369 states and 48375 transitions. [2022-11-16 11:11:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2022-11-16 11:11:36,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:36,162 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:36,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:11:36,162 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:36,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:36,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1903494745, now seen corresponding path program 1 times [2022-11-16 11:11:36,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:36,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873635452] [2022-11-16 11:11:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:36,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 11:11:36,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:36,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873635452] [2022-11-16 11:11:36,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873635452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:36,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616036299] [2022-11-16 11:11:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:36,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:36,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:36,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:36,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:11:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:37,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:11:37,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 11:11:37,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:11:37,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616036299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:37,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:11:37,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-16 11:11:37,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078728358] [2022-11-16 11:11:37,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:37,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:11:37,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:37,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:11:37,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:11:37,209 INFO L87 Difference]: Start difference. First operand 45369 states and 48375 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:38,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:38,506 INFO L93 Difference]: Finished difference Result 125121 states and 133467 transitions. [2022-11-16 11:11:38,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:11:38,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 364 [2022-11-16 11:11:38,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:38,565 INFO L225 Difference]: With dead ends: 125121 [2022-11-16 11:11:38,565 INFO L226 Difference]: Without dead ends: 80972 [2022-11-16 11:11:38,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:11:38,587 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 521 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:38,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 432 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:11:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80972 states. [2022-11-16 11:11:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80972 to 79732. [2022-11-16 11:11:39,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79732 states, 79731 states have (on average 1.065984372452371) internal successors, (84992), 79731 states have internal predecessors, (84992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79732 states to 79732 states and 84992 transitions. [2022-11-16 11:11:39,741 INFO L78 Accepts]: Start accepts. Automaton has 79732 states and 84992 transitions. Word has length 364 [2022-11-16 11:11:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:39,742 INFO L495 AbstractCegarLoop]: Abstraction has 79732 states and 84992 transitions. [2022-11-16 11:11:39,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 79732 states and 84992 transitions. [2022-11-16 11:11:39,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-11-16 11:11:39,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:39,765 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:11:39,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:39,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:11:39,967 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:39,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash -698379154, now seen corresponding path program 1 times [2022-11-16 11:11:39,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:39,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042491520] [2022-11-16 11:11:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:39,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 192 proven. 6 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-16 11:11:40,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:40,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042491520] [2022-11-16 11:11:40,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042491520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:40,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838926049] [2022-11-16 11:11:40,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:40,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:40,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:40,628 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:40,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:11:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:40,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:11:40,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-16 11:11:41,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:11:41,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838926049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:41,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:11:41,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-16 11:11:41,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859131793] [2022-11-16 11:11:41,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:41,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:41,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:41,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:41,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:11:41,107 INFO L87 Difference]: Start difference. First operand 79732 states and 84992 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:42,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:42,284 INFO L93 Difference]: Finished difference Result 233906 states and 249387 transitions. [2022-11-16 11:11:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:42,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 366 [2022-11-16 11:11:42,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:42,417 INFO L225 Difference]: With dead ends: 233906 [2022-11-16 11:11:42,417 INFO L226 Difference]: Without dead ends: 155394 [2022-11-16 11:11:42,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:11:42,446 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 185 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:42,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 485 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:11:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155394 states. [2022-11-16 11:11:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155394 to 155390. [2022-11-16 11:11:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155390 states, 155389 states have (on average 1.0656738894001505) internal successors, (165594), 155389 states have internal predecessors, (165594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155390 states to 155390 states and 165594 transitions. [2022-11-16 11:11:44,993 INFO L78 Accepts]: Start accepts. Automaton has 155390 states and 165594 transitions. Word has length 366 [2022-11-16 11:11:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:44,994 INFO L495 AbstractCegarLoop]: Abstraction has 155390 states and 165594 transitions. [2022-11-16 11:11:44,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:44,994 INFO L276 IsEmpty]: Start isEmpty. Operand 155390 states and 165594 transitions. [2022-11-16 11:11:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-11-16 11:11:45,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:45,030 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:11:45,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:45,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:45,231 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:45,231 INFO L85 PathProgramCache]: Analyzing trace with hash 598075760, now seen corresponding path program 1 times [2022-11-16 11:11:45,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:45,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741359258] [2022-11-16 11:11:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:45,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:11:46,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:46,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741359258] [2022-11-16 11:11:46,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741359258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:46,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:11:46,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:11:46,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259650108] [2022-11-16 11:11:46,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:46,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:46,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:46,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:46,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:46,204 INFO L87 Difference]: Start difference. First operand 155390 states and 165594 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:47,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:47,963 INFO L93 Difference]: Finished difference Result 327655 states and 348716 transitions. [2022-11-16 11:11:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:47,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 366 [2022-11-16 11:11:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:48,140 INFO L225 Difference]: With dead ends: 327655 [2022-11-16 11:11:48,140 INFO L226 Difference]: Without dead ends: 173485 [2022-11-16 11:11:48,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:48,194 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 166 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:48,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 323 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:11:48,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173485 states. [2022-11-16 11:11:50,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173485 to 173457. [2022-11-16 11:11:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173457 states, 173456 states have (on average 1.0604072502536666) internal successors, (183934), 173456 states have internal predecessors, (183934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173457 states to 173457 states and 183934 transitions. [2022-11-16 11:11:51,151 INFO L78 Accepts]: Start accepts. Automaton has 173457 states and 183934 transitions. Word has length 366 [2022-11-16 11:11:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:51,151 INFO L495 AbstractCegarLoop]: Abstraction has 173457 states and 183934 transitions. [2022-11-16 11:11:51,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 173457 states and 183934 transitions. [2022-11-16 11:11:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-11-16 11:11:51,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:51,180 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:11:51,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 11:11:51,180 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:51,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:51,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1124981834, now seen corresponding path program 1 times [2022-11-16 11:11:51,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:51,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940206114] [2022-11-16 11:11:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:51,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 221 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:53,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:53,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940206114] [2022-11-16 11:11:53,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940206114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:53,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634730652] [2022-11-16 11:11:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:53,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:53,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:53,431 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:53,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:11:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:53,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:11:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-16 11:11:53,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:11:53,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634730652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:53,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:11:53,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-11-16 11:11:53,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960582221] [2022-11-16 11:11:53,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:53,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:53,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:53,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:53,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:11:53,963 INFO L87 Difference]: Start difference. First operand 173457 states and 183934 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:55,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:55,863 INFO L93 Difference]: Finished difference Result 349416 states and 371083 transitions. [2022-11-16 11:11:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:55,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 383 [2022-11-16 11:11:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:56,056 INFO L225 Difference]: With dead ends: 349416 [2022-11-16 11:11:56,056 INFO L226 Difference]: Without dead ends: 177179 [2022-11-16 11:11:56,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:11:56,141 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 53 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:56,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 315 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:11:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177179 states. [2022-11-16 11:11:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177179 to 173853. [2022-11-16 11:11:59,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173853 states, 173852 states have (on average 1.0601603662885672) internal successors, (184311), 173852 states have internal predecessors, (184311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:59,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173853 states to 173853 states and 184311 transitions. [2022-11-16 11:11:59,247 INFO L78 Accepts]: Start accepts. Automaton has 173853 states and 184311 transitions. Word has length 383 [2022-11-16 11:11:59,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:59,247 INFO L495 AbstractCegarLoop]: Abstraction has 173853 states and 184311 transitions. [2022-11-16 11:11:59,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:59,247 INFO L276 IsEmpty]: Start isEmpty. Operand 173853 states and 184311 transitions. [2022-11-16 11:11:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-11-16 11:11:59,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:59,279 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:59,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:59,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb3d9342-112c-4272-8c4c-8e57403baa98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:59,480 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:59,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2057443229, now seen corresponding path program 1 times [2022-11-16 11:11:59,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:59,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974487167] [2022-11-16 11:11:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:59,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-16 11:11:59,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:59,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974487167] [2022-11-16 11:11:59,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974487167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:59,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:11:59,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:11:59,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521761183] [2022-11-16 11:11:59,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:59,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:11:59,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:59,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:11:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:11:59,835 INFO L87 Difference]: Start difference. First operand 173853 states and 184311 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)