./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/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_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/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_463602c7-9890-4685-ab61-65fdd6745a28/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 ca658a8a4271e1b6abd8c554fa2f86da0f765323e5a4dbf7051e477838d5322c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:14:42,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:14:42,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:14:42,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:14:42,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:14:42,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:14:42,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:14:42,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:14:42,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:14:42,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:14:42,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:14:42,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:14:42,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:14:42,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:14:42,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:14:42,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:14:42,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:14:42,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:14:42,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:14:42,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:14:42,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:14:42,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:14:42,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:14:42,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:14:42,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:14:42,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:14:42,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:14:42,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:14:42,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:14:42,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:14:42,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:14:42,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:14:42,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:14:42,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:14:42,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:14:42,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:14:42,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:14:42,609 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:14:42,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:14:42,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:14:42,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:14:42,613 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:14:42,663 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:14:42,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:14:42,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:14:42,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:14:42,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:14:42,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:14:42,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:14:42,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:14:42,668 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:14:42,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:14:42,669 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:14:42,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:14:42,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:14:42,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:14:42,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:14:42,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:14:42,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:14:42,671 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:14:42,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:14:42,672 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:14:42,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:14:42,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:14:42,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:14:42,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:14:42,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:14:42,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:14:42,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:14:42,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:14:42,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:14:42,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:14:42,677 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:14:42,677 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:14:42,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:14:42,678 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_463602c7-9890-4685-ab61-65fdd6745a28/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca658a8a4271e1b6abd8c554fa2f86da0f765323e5a4dbf7051e477838d5322c [2022-11-16 12:14:43,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:14:43,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:14:43,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:14:43,107 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:14:43,108 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:14:43,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c [2022-11-16 12:14:43,212 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/data/296f8fcab/b9ee4984f004413591ed234f5a447b7d/FLAGe82b4c25f [2022-11-16 12:14:44,169 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:14:44,170 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c [2022-11-16 12:14:44,215 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/data/296f8fcab/b9ee4984f004413591ed234f5a447b7d/FLAGe82b4c25f [2022-11-16 12:14:44,656 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/data/296f8fcab/b9ee4984f004413591ed234f5a447b7d [2022-11-16 12:14:44,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:14:44,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:14:44,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:14:44,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:14:44,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:14:44,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:14:44" (1/1) ... [2022-11-16 12:14:44,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c2caccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:44, skipping insertion in model container [2022-11-16 12:14:44,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:14:44" (1/1) ... [2022-11-16 12:14:44,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:14:44,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:14:45,350 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_463602c7-9890-4685-ab61-65fdd6745a28/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c[8712,8725] [2022-11-16 12:14:45,435 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_463602c7-9890-4685-ab61-65fdd6745a28/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c[16002,16015] [2022-11-16 12:14:46,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:14:46,674 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:14:46,722 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_463602c7-9890-4685-ab61-65fdd6745a28/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c[8712,8725] [2022-11-16 12:14:46,757 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_463602c7-9890-4685-ab61-65fdd6745a28/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c[16002,16015] [2022-11-16 12:14:47,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:14:47,436 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:14:47,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47 WrapperNode [2022-11-16 12:14:47,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:14:47,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:14:47,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:14:47,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:14:47,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:47,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:47,978 INFO L138 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5015 [2022-11-16 12:14:47,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:14:47,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:14:47,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:14:47,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:14:47,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:47,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:48,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:48,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:48,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:48,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:48,414 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:48,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:48,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:14:48,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:14:48,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:14:48,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:14:48,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (1/1) ... [2022-11-16 12:14:48,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:14:48,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:48,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:14:48,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:14:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:14:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:14:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:14:48,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:14:48,968 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:14:48,970 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:14:55,250 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:14:55,272 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:14:55,273 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:14:55,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:14:55 BoogieIcfgContainer [2022-11-16 12:14:55,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:14:55,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:14:55,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:14:55,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:14:55,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:14:44" (1/3) ... [2022-11-16 12:14:55,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@977c096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:14:55, skipping insertion in model container [2022-11-16 12:14:55,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:47" (2/3) ... [2022-11-16 12:14:55,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@977c096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:14:55, skipping insertion in model container [2022-11-16 12:14:55,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:14:55" (3/3) ... [2022-11-16 12:14:55,290 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label02.c [2022-11-16 12:14:55,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:14:55,314 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 12:14:55,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:14:55,441 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;@25dc039, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:14:55,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:14:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 887 states, 884 states have (on average 1.9049773755656108) internal successors, (1684), 886 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 12:14:55,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:55,462 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] [2022-11-16 12:14:55,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:55,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:55,469 INFO L85 PathProgramCache]: Analyzing trace with hash 593970293, now seen corresponding path program 1 times [2022-11-16 12:14:55,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:55,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747226373] [2022-11-16 12:14:55,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:55,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:55,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:55,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747226373] [2022-11-16 12:14:55,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747226373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:55,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:55,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:14:55,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488752947] [2022-11-16 12:14:55,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:55,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:14:55,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:55,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:14:55,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:14:55,808 INFO L87 Difference]: Start difference. First operand has 887 states, 884 states have (on average 1.9049773755656108) internal successors, (1684), 886 states have internal predecessors, (1684), 0 states have call successors, (0), 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 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:55,967 INFO L93 Difference]: Finished difference Result 1743 states and 3312 transitions. [2022-11-16 12:14:55,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:14:55,970 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-16 12:14:55,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:56,000 INFO L225 Difference]: With dead ends: 1743 [2022-11-16 12:14:56,000 INFO L226 Difference]: Without dead ends: 821 [2022-11-16 12:14:56,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:14:56,017 INFO L413 NwaCegarLoop]: 1615 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:56,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1615 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:14:56,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-11-16 12:14:56,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 821. [2022-11-16 12:14:56,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 819 states have (on average 1.8937728937728937) internal successors, (1551), 820 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1551 transitions. [2022-11-16 12:14:56,144 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1551 transitions. Word has length 22 [2022-11-16 12:14:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:56,144 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1551 transitions. [2022-11-16 12:14:56,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:56,145 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1551 transitions. [2022-11-16 12:14:56,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 12:14:56,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:56,147 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] [2022-11-16 12:14:56,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:14:56,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:56,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:56,148 INFO L85 PathProgramCache]: Analyzing trace with hash -427098061, now seen corresponding path program 1 times [2022-11-16 12:14:56,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:56,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497782769] [2022-11-16 12:14:56,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:56,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:56,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:56,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497782769] [2022-11-16 12:14:56,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497782769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:56,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:56,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:14:56,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953168882] [2022-11-16 12:14:56,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:56,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:14:56,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:56,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:14:56,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:14:56,525 INFO L87 Difference]: Start difference. First operand 821 states and 1551 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:56,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:56,737 INFO L93 Difference]: Finished difference Result 863 states and 1615 transitions. [2022-11-16 12:14:56,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:14:56,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-16 12:14:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:56,742 INFO L225 Difference]: With dead ends: 863 [2022-11-16 12:14:56,742 INFO L226 Difference]: Without dead ends: 821 [2022-11-16 12:14:56,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:14:56,745 INFO L413 NwaCegarLoop]: 1549 mSDtfsCounter, 3 mSDsluCounter, 4621 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6170 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:56,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6170 Invalid, 33 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:14:56,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-11-16 12:14:56,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 821. [2022-11-16 12:14:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 819 states have (on average 1.8656898656898657) internal successors, (1528), 820 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1528 transitions. [2022-11-16 12:14:56,786 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1528 transitions. Word has length 22 [2022-11-16 12:14:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:56,786 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1528 transitions. [2022-11-16 12:14:56,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1528 transitions. [2022-11-16 12:14:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 12:14:56,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:56,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:56,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:14:56,790 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:56,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:56,837 INFO L85 PathProgramCache]: Analyzing trace with hash 3301806, now seen corresponding path program 1 times [2022-11-16 12:14:56,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:56,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803426531] [2022-11-16 12:14:56,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:56,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:57,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:57,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803426531] [2022-11-16 12:14:57,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803426531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:57,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:57,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:14:57,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369689311] [2022-11-16 12:14:57,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:57,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:14:57,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:57,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:14:57,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:14:57,111 INFO L87 Difference]: Start difference. First operand 821 states and 1528 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:57,379 INFO L93 Difference]: Finished difference Result 1125 states and 2008 transitions. [2022-11-16 12:14:57,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:14:57,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-11-16 12:14:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:57,385 INFO L225 Difference]: With dead ends: 1125 [2022-11-16 12:14:57,386 INFO L226 Difference]: Without dead ends: 1087 [2022-11-16 12:14:57,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:14:57,396 INFO L413 NwaCegarLoop]: 1522 mSDtfsCounter, 6285 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6285 SdHoareTripleChecker+Valid, 2135 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:57,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6285 Valid, 2135 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:14:57,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-11-16 12:14:57,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 857. [2022-11-16 12:14:57,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 855 states have (on average 1.8538011695906433) internal successors, (1585), 856 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1585 transitions. [2022-11-16 12:14:57,433 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1585 transitions. Word has length 44 [2022-11-16 12:14:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:57,434 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1585 transitions. [2022-11-16 12:14:57,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:57,435 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1585 transitions. [2022-11-16 12:14:57,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 12:14:57,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:57,446 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] [2022-11-16 12:14:57,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:14:57,446 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1757336638, now seen corresponding path program 1 times [2022-11-16 12:14:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:57,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281991080] [2022-11-16 12:14:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:57,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:57,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:57,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281991080] [2022-11-16 12:14:57,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281991080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:57,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:57,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:14:57,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448943935] [2022-11-16 12:14:57,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:57,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:57,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:57,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:57,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:57,650 INFO L87 Difference]: Start difference. First operand 857 states and 1585 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:57,710 INFO L93 Difference]: Finished difference Result 994 states and 1800 transitions. [2022-11-16 12:14:57,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:57,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2022-11-16 12:14:57,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:57,716 INFO L225 Difference]: With dead ends: 994 [2022-11-16 12:14:57,716 INFO L226 Difference]: Without dead ends: 920 [2022-11-16 12:14:57,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:57,718 INFO L413 NwaCegarLoop]: 1524 mSDtfsCounter, 1476 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:57,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 1577 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:14:57,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-11-16 12:14:57,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 916. [2022-11-16 12:14:57,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 914 states have (on average 1.8326039387308535) internal successors, (1675), 915 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:57,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1675 transitions. [2022-11-16 12:14:57,757 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1675 transitions. Word has length 46 [2022-11-16 12:14:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:57,757 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1675 transitions. [2022-11-16 12:14:57,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1675 transitions. [2022-11-16 12:14:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 12:14:57,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:57,759 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] [2022-11-16 12:14:57,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:14:57,760 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:57,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1823830150, now seen corresponding path program 1 times [2022-11-16 12:14:57,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:57,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321936217] [2022-11-16 12:14:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:57,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:58,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:58,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321936217] [2022-11-16 12:14:58,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321936217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:58,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:58,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:14:58,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612008541] [2022-11-16 12:14:58,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:58,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:14:58,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:58,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:14:58,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:14:58,136 INFO L87 Difference]: Start difference. First operand 916 states and 1675 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:58,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:58,335 INFO L93 Difference]: Finished difference Result 1051 states and 1883 transitions. [2022-11-16 12:14:58,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:14:58,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2022-11-16 12:14:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:58,342 INFO L225 Difference]: With dead ends: 1051 [2022-11-16 12:14:58,343 INFO L226 Difference]: Without dead ends: 918 [2022-11-16 12:14:58,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:14:58,346 INFO L413 NwaCegarLoop]: 1522 mSDtfsCounter, 6008 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6008 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:58,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6008 Valid, 1690 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:14:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-11-16 12:14:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 916. [2022-11-16 12:14:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 914 states have (on average 1.8304157549234135) internal successors, (1673), 915 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:58,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1673 transitions. [2022-11-16 12:14:58,387 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1673 transitions. Word has length 46 [2022-11-16 12:14:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:58,393 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1673 transitions. [2022-11-16 12:14:58,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1673 transitions. [2022-11-16 12:14:58,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 12:14:58,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:58,396 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] [2022-11-16 12:14:58,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:14:58,398 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:58,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:58,403 INFO L85 PathProgramCache]: Analyzing trace with hash 289436656, now seen corresponding path program 1 times [2022-11-16 12:14:58,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:58,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228061087] [2022-11-16 12:14:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:58,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:58,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:58,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228061087] [2022-11-16 12:14:58,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228061087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:58,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:58,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:14:58,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149221335] [2022-11-16 12:14:58,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:58,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:14:58,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:58,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:14:58,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:14:58,719 INFO L87 Difference]: Start difference. First operand 916 states and 1673 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:58,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:58,845 INFO L93 Difference]: Finished difference Result 1045 states and 1867 transitions. [2022-11-16 12:14:58,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:14:58,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2022-11-16 12:14:58,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:58,852 INFO L225 Difference]: With dead ends: 1045 [2022-11-16 12:14:58,852 INFO L226 Difference]: Without dead ends: 1043 [2022-11-16 12:14:58,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:14:58,854 INFO L413 NwaCegarLoop]: 1578 mSDtfsCounter, 151 mSDsluCounter, 4586 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 6164 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:58,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 6164 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:14:58,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-11-16 12:14:58,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 922. [2022-11-16 12:14:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 920 states have (on average 1.8239130434782609) internal successors, (1678), 921 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1678 transitions. [2022-11-16 12:14:58,894 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1678 transitions. Word has length 47 [2022-11-16 12:14:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:58,895 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1678 transitions. [2022-11-16 12:14:58,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:58,896 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1678 transitions. [2022-11-16 12:14:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 12:14:58,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:58,897 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] [2022-11-16 12:14:58,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:14:58,897 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:58,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:58,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2036800602, now seen corresponding path program 1 times [2022-11-16 12:14:58,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:58,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640165454] [2022-11-16 12:14:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:58,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:58,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:58,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640165454] [2022-11-16 12:14:58,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640165454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:58,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:58,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:14:58,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140531171] [2022-11-16 12:14:58,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:59,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:59,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:59,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:59,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:59,001 INFO L87 Difference]: Start difference. First operand 922 states and 1678 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:59,058 INFO L93 Difference]: Finished difference Result 1184 states and 2070 transitions. [2022-11-16 12:14:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:59,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2022-11-16 12:14:59,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:59,064 INFO L225 Difference]: With dead ends: 1184 [2022-11-16 12:14:59,064 INFO L226 Difference]: Without dead ends: 1045 [2022-11-16 12:14:59,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:59,066 INFO L413 NwaCegarLoop]: 1565 mSDtfsCounter, 1487 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:59,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1487 Valid, 1630 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:14:59,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-11-16 12:14:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 1043. [2022-11-16 12:14:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1041 states have (on average 1.781940441882805) internal successors, (1855), 1042 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:59,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1855 transitions. [2022-11-16 12:14:59,117 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1855 transitions. Word has length 48 [2022-11-16 12:14:59,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:59,118 INFO L495 AbstractCegarLoop]: Abstraction has 1043 states and 1855 transitions. [2022-11-16 12:14:59,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:59,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1855 transitions. [2022-11-16 12:14:59,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 12:14:59,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:59,120 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] [2022-11-16 12:14:59,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:14:59,120 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:59,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:59,121 INFO L85 PathProgramCache]: Analyzing trace with hash 42697894, now seen corresponding path program 1 times [2022-11-16 12:14:59,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:59,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49626025] [2022-11-16 12:14:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:59,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:59,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:59,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49626025] [2022-11-16 12:14:59,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49626025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:59,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:59,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:14:59,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250992171] [2022-11-16 12:14:59,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:59,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:59,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:59,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:59,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:59,181 INFO L87 Difference]: Start difference. First operand 1043 states and 1855 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:59,264 INFO L93 Difference]: Finished difference Result 1531 states and 2573 transitions. [2022-11-16 12:14:59,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:59,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2022-11-16 12:14:59,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:59,271 INFO L225 Difference]: With dead ends: 1531 [2022-11-16 12:14:59,271 INFO L226 Difference]: Without dead ends: 1271 [2022-11-16 12:14:59,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:59,273 INFO L413 NwaCegarLoop]: 1563 mSDtfsCounter, 1485 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:59,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 1632 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:14:59,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2022-11-16 12:14:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1269. [2022-11-16 12:14:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1267 states have (on average 1.718232044198895) internal successors, (2177), 1268 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:59,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 2177 transitions. [2022-11-16 12:14:59,355 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 2177 transitions. Word has length 48 [2022-11-16 12:14:59,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:59,356 INFO L495 AbstractCegarLoop]: Abstraction has 1269 states and 2177 transitions. [2022-11-16 12:14:59,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:59,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 2177 transitions. [2022-11-16 12:14:59,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 12:14:59,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:59,358 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] [2022-11-16 12:14:59,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:14:59,358 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:59,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:59,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1823630758, now seen corresponding path program 1 times [2022-11-16 12:14:59,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:59,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905879718] [2022-11-16 12:14:59,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:59,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:59,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:59,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905879718] [2022-11-16 12:14:59,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905879718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:59,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:59,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:14:59,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519847357] [2022-11-16 12:14:59,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:59,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:59,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:59,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:59,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:59,415 INFO L87 Difference]: Start difference. First operand 1269 states and 2177 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:59,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:59,554 INFO L93 Difference]: Finished difference Result 2177 states and 3483 transitions. [2022-11-16 12:14:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:59,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2022-11-16 12:14:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:59,562 INFO L225 Difference]: With dead ends: 2177 [2022-11-16 12:14:59,562 INFO L226 Difference]: Without dead ends: 1691 [2022-11-16 12:14:59,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:59,564 INFO L413 NwaCegarLoop]: 1561 mSDtfsCounter, 1483 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1483 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:59,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1483 Valid, 1634 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:14:59,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2022-11-16 12:14:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1689. [2022-11-16 12:14:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1687 states have (on average 1.6342620035566093) internal successors, (2757), 1688 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2757 transitions. [2022-11-16 12:14:59,702 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2757 transitions. Word has length 48 [2022-11-16 12:14:59,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:59,702 INFO L495 AbstractCegarLoop]: Abstraction has 1689 states and 2757 transitions. [2022-11-16 12:14:59,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:59,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2757 transitions. [2022-11-16 12:14:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 12:14:59,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:59,704 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] [2022-11-16 12:14:59,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:14:59,704 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:14:59,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:59,705 INFO L85 PathProgramCache]: Analyzing trace with hash 246335073, now seen corresponding path program 1 times [2022-11-16 12:14:59,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:59,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915571099] [2022-11-16 12:14:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:59,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:59,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:59,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915571099] [2022-11-16 12:14:59,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915571099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:59,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:59,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:14:59,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023853303] [2022-11-16 12:14:59,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:59,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:59,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:59,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:59,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:59,762 INFO L87 Difference]: Start difference. First operand 1689 states and 2757 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:59,950 INFO L93 Difference]: Finished difference Result 2656 states and 4155 transitions. [2022-11-16 12:14:59,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:59,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2022-11-16 12:14:59,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:59,960 INFO L225 Difference]: With dead ends: 2656 [2022-11-16 12:14:59,961 INFO L226 Difference]: Without dead ends: 2125 [2022-11-16 12:14:59,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:59,964 INFO L413 NwaCegarLoop]: 1570 mSDtfsCounter, 1486 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:59,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1486 Valid, 1631 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:14:59,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2022-11-16 12:15:00,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 2123. [2022-11-16 12:15:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2121 states have (on average 1.5836869401225837) internal successors, (3359), 2122 states have internal predecessors, (3359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3359 transitions. [2022-11-16 12:15:00,236 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3359 transitions. Word has length 50 [2022-11-16 12:15:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:00,236 INFO L495 AbstractCegarLoop]: Abstraction has 2123 states and 3359 transitions. [2022-11-16 12:15:00,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3359 transitions. [2022-11-16 12:15:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 12:15:00,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:00,238 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] [2022-11-16 12:15:00,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:15:00,239 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:00,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:00,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1201090937, now seen corresponding path program 1 times [2022-11-16 12:15:00,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:00,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964937454] [2022-11-16 12:15:00,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:00,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:00,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:00,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964937454] [2022-11-16 12:15:00,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964937454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:00,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:00,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:15:00,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669040647] [2022-11-16 12:15:00,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:00,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:15:00,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:15:00,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:15:00,417 INFO L87 Difference]: Start difference. First operand 2123 states and 3359 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:10,882 INFO L93 Difference]: Finished difference Result 4378 states and 7668 transitions. [2022-11-16 12:15:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:15:10,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2022-11-16 12:15:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:10,904 INFO L225 Difference]: With dead ends: 4378 [2022-11-16 12:15:10,905 INFO L226 Difference]: Without dead ends: 3625 [2022-11-16 12:15:10,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:15:10,907 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 2365 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2365 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 6507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1153 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:10,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2365 Valid, 782 Invalid, 6507 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1153 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-11-16 12:15:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2022-11-16 12:15:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 3625. [2022-11-16 12:15:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 3623 states have (on average 1.5106265525807343) internal successors, (5473), 3624 states have internal predecessors, (5473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 5473 transitions. [2022-11-16 12:15:11,190 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 5473 transitions. Word has length 63 [2022-11-16 12:15:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:11,190 INFO L495 AbstractCegarLoop]: Abstraction has 3625 states and 5473 transitions. [2022-11-16 12:15:11,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:11,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 5473 transitions. [2022-11-16 12:15:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 12:15:11,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:11,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:11,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:15:11,193 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:11,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:11,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1523853909, now seen corresponding path program 1 times [2022-11-16 12:15:11,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:11,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373092077] [2022-11-16 12:15:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:11,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:15:11,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:11,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373092077] [2022-11-16 12:15:11,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373092077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:11,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:11,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:15:11,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511165701] [2022-11-16 12:15:11,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:11,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:15:11,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:11,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:15:11,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:15:11,382 INFO L87 Difference]: Start difference. First operand 3625 states and 5473 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:12,506 INFO L93 Difference]: Finished difference Result 9275 states and 13430 transitions. [2022-11-16 12:15:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:15:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 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 65 [2022-11-16 12:15:12,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:12,566 INFO L225 Difference]: With dead ends: 9275 [2022-11-16 12:15:12,566 INFO L226 Difference]: Without dead ends: 7937 [2022-11-16 12:15:12,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:15:12,572 INFO L413 NwaCegarLoop]: 1582 mSDtfsCounter, 4664 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4664 SdHoareTripleChecker+Valid, 3368 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:12,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4664 Valid, 3368 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:15:12,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7937 states. [2022-11-16 12:15:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7937 to 4961. [2022-11-16 12:15:13,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4961 states, 4959 states have (on average 1.4795321637426901) internal successors, (7337), 4960 states have internal predecessors, (7337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4961 states to 4961 states and 7337 transitions. [2022-11-16 12:15:13,126 INFO L78 Accepts]: Start accepts. Automaton has 4961 states and 7337 transitions. Word has length 65 [2022-11-16 12:15:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:13,126 INFO L495 AbstractCegarLoop]: Abstraction has 4961 states and 7337 transitions. [2022-11-16 12:15:13,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4961 states and 7337 transitions. [2022-11-16 12:15:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 12:15:13,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:13,128 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:13,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:15:13,129 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:13,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:13,130 INFO L85 PathProgramCache]: Analyzing trace with hash 555644587, now seen corresponding path program 1 times [2022-11-16 12:15:13,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:13,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917709272] [2022-11-16 12:15:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:13,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:15:13,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:13,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917709272] [2022-11-16 12:15:13,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917709272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:13,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:13,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:15:13,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181562932] [2022-11-16 12:15:13,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:13,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:15:13,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:13,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:15:13,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:15:13,366 INFO L87 Difference]: Start difference. First operand 4961 states and 7337 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:14,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:14,774 INFO L93 Difference]: Finished difference Result 10611 states and 15294 transitions. [2022-11-16 12:15:14,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:15:14,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 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 65 [2022-11-16 12:15:14,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:14,801 INFO L225 Difference]: With dead ends: 10611 [2022-11-16 12:15:14,802 INFO L226 Difference]: Without dead ends: 9273 [2022-11-16 12:15:14,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:15:14,807 INFO L413 NwaCegarLoop]: 1579 mSDtfsCounter, 4693 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4693 SdHoareTripleChecker+Valid, 3303 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:14,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4693 Valid, 3303 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:15:14,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9273 states. [2022-11-16 12:15:15,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9273 to 6969. [2022-11-16 12:15:15,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6969 states, 6967 states have (on average 1.451557341753983) internal successors, (10113), 6968 states have internal predecessors, (10113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6969 states to 6969 states and 10113 transitions. [2022-11-16 12:15:15,651 INFO L78 Accepts]: Start accepts. Automaton has 6969 states and 10113 transitions. Word has length 65 [2022-11-16 12:15:15,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:15,652 INFO L495 AbstractCegarLoop]: Abstraction has 6969 states and 10113 transitions. [2022-11-16 12:15:15,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:15,653 INFO L276 IsEmpty]: Start isEmpty. Operand 6969 states and 10113 transitions. [2022-11-16 12:15:15,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 12:15:15,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:15,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:15,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:15:15,655 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:15,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:15,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1958389845, now seen corresponding path program 1 times [2022-11-16 12:15:15,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:15,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265831251] [2022-11-16 12:15:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:15,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:15:15,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:15,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265831251] [2022-11-16 12:15:15,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265831251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:15,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:15,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:15:15,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363895332] [2022-11-16 12:15:15,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:15,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:15:15,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:15,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:15:15,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:15:15,815 INFO L87 Difference]: Start difference. First operand 6969 states and 10113 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:17,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:17,015 INFO L93 Difference]: Finished difference Result 11947 states and 17158 transitions. [2022-11-16 12:15:17,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:15:17,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 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 65 [2022-11-16 12:15:17,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:17,039 INFO L225 Difference]: With dead ends: 11947 [2022-11-16 12:15:17,039 INFO L226 Difference]: Without dead ends: 10609 [2022-11-16 12:15:17,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:15:17,046 INFO L413 NwaCegarLoop]: 1581 mSDtfsCounter, 4674 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4674 SdHoareTripleChecker+Valid, 3337 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:17,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4674 Valid, 3337 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:15:17,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10609 states. [2022-11-16 12:15:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10609 to 8305. [2022-11-16 12:15:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8305 states, 8303 states have (on average 1.4424906660243286) internal successors, (11977), 8304 states have internal predecessors, (11977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:18,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8305 states to 8305 states and 11977 transitions. [2022-11-16 12:15:18,087 INFO L78 Accepts]: Start accepts. Automaton has 8305 states and 11977 transitions. Word has length 65 [2022-11-16 12:15:18,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:18,088 INFO L495 AbstractCegarLoop]: Abstraction has 8305 states and 11977 transitions. [2022-11-16 12:15:18,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:18,088 INFO L276 IsEmpty]: Start isEmpty. Operand 8305 states and 11977 transitions. [2022-11-16 12:15:18,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 12:15:18,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:18,091 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:18,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:15:18,091 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:18,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1188964029, now seen corresponding path program 1 times [2022-11-16 12:15:18,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:18,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339231704] [2022-11-16 12:15:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:18,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:18,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:18,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339231704] [2022-11-16 12:15:18,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339231704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:18,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:18,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:15:18,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715350958] [2022-11-16 12:15:18,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:18,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:18,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:18,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:18,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:18,205 INFO L87 Difference]: Start difference. First operand 8305 states and 11977 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:18,804 INFO L93 Difference]: Finished difference Result 12647 states and 18118 transitions. [2022-11-16 12:15:18,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:18,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2022-11-16 12:15:18,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:18,820 INFO L225 Difference]: With dead ends: 12647 [2022-11-16 12:15:18,821 INFO L226 Difference]: Without dead ends: 6629 [2022-11-16 12:15:18,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:18,831 INFO L413 NwaCegarLoop]: 1560 mSDtfsCounter, 42 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3073 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:18,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3073 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:15:18,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6629 states. [2022-11-16 12:15:19,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6629 to 6627. [2022-11-16 12:15:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6627 states, 6625 states have (on average 1.4567547169811321) internal successors, (9651), 6626 states have internal predecessors, (9651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6627 states to 6627 states and 9651 transitions. [2022-11-16 12:15:19,599 INFO L78 Accepts]: Start accepts. Automaton has 6627 states and 9651 transitions. Word has length 67 [2022-11-16 12:15:19,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:19,599 INFO L495 AbstractCegarLoop]: Abstraction has 6627 states and 9651 transitions. [2022-11-16 12:15:19,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:19,601 INFO L276 IsEmpty]: Start isEmpty. Operand 6627 states and 9651 transitions. [2022-11-16 12:15:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 12:15:19,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:19,603 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:15:19,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:15:19,603 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash -733131994, now seen corresponding path program 1 times [2022-11-16 12:15:19,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:19,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098286238] [2022-11-16 12:15:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:19,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:15:19,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:19,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098286238] [2022-11-16 12:15:19,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098286238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:19,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:19,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:15:19,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792725865] [2022-11-16 12:15:19,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:19,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:15:19,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:19,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:15:19,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:15:19,804 INFO L87 Difference]: Start difference. First operand 6627 states and 9651 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:20,773 INFO L93 Difference]: Finished difference Result 10477 states and 15096 transitions. [2022-11-16 12:15:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:15:20,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 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 67 [2022-11-16 12:15:20,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:20,794 INFO L225 Difference]: With dead ends: 10477 [2022-11-16 12:15:20,794 INFO L226 Difference]: Without dead ends: 9515 [2022-11-16 12:15:20,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:15:20,800 INFO L413 NwaCegarLoop]: 1577 mSDtfsCounter, 4666 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4666 SdHoareTripleChecker+Valid, 3404 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:20,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4666 Valid, 3404 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:15:20,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9515 states. [2022-11-16 12:15:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9515 to 7587. [2022-11-16 12:15:21,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7587 states, 7585 states have (on average 1.4495715227422545) internal successors, (10995), 7586 states have internal predecessors, (10995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:21,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7587 states to 7587 states and 10995 transitions. [2022-11-16 12:15:21,534 INFO L78 Accepts]: Start accepts. Automaton has 7587 states and 10995 transitions. Word has length 67 [2022-11-16 12:15:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:21,534 INFO L495 AbstractCegarLoop]: Abstraction has 7587 states and 10995 transitions. [2022-11-16 12:15:21,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:21,535 INFO L276 IsEmpty]: Start isEmpty. Operand 7587 states and 10995 transitions. [2022-11-16 12:15:21,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 12:15:21,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:21,537 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:15:21,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 12:15:21,537 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:21,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:21,538 INFO L85 PathProgramCache]: Analyzing trace with hash 548136257, now seen corresponding path program 1 times [2022-11-16 12:15:21,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:21,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203754083] [2022-11-16 12:15:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:21,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:21,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:21,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203754083] [2022-11-16 12:15:21,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203754083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:21,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:21,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:15:21,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814056078] [2022-11-16 12:15:21,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:21,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:21,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:21,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:21,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:21,651 INFO L87 Difference]: Start difference. First operand 7587 states and 10995 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:22,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:22,160 INFO L93 Difference]: Finished difference Result 10231 states and 14693 transitions. [2022-11-16 12:15:22,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:22,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2022-11-16 12:15:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:22,168 INFO L225 Difference]: With dead ends: 10231 [2022-11-16 12:15:22,168 INFO L226 Difference]: Without dead ends: 4949 [2022-11-16 12:15:22,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:22,175 INFO L413 NwaCegarLoop]: 1553 mSDtfsCounter, 37 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3058 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:22,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 3058 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:15:22,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4949 states. [2022-11-16 12:15:22,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4949 to 4947. [2022-11-16 12:15:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4947 states, 4945 states have (on average 1.4671385237613752) internal successors, (7255), 4946 states have internal predecessors, (7255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4947 states to 4947 states and 7255 transitions. [2022-11-16 12:15:22,697 INFO L78 Accepts]: Start accepts. Automaton has 4947 states and 7255 transitions. Word has length 68 [2022-11-16 12:15:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:22,698 INFO L495 AbstractCegarLoop]: Abstraction has 4947 states and 7255 transitions. [2022-11-16 12:15:22,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:22,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4947 states and 7255 transitions. [2022-11-16 12:15:22,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 12:15:22,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:22,700 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:15:22,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:15:22,700 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:22,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:22,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1967598547, now seen corresponding path program 1 times [2022-11-16 12:15:22,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:22,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266814817] [2022-11-16 12:15:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:22,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:22,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:22,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266814817] [2022-11-16 12:15:22,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266814817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:22,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:22,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:15:22,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946998825] [2022-11-16 12:15:22,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:22,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:22,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:22,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:22,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:22,807 INFO L87 Difference]: Start difference. First operand 4947 states and 7255 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:23,085 INFO L93 Difference]: Finished difference Result 6271 states and 9083 transitions. [2022-11-16 12:15:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:23,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2022-11-16 12:15:23,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:23,094 INFO L225 Difference]: With dead ends: 6271 [2022-11-16 12:15:23,095 INFO L226 Difference]: Without dead ends: 3629 [2022-11-16 12:15:23,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:23,099 INFO L413 NwaCegarLoop]: 1546 mSDtfsCounter, 34 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3043 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:23,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3043 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:15:23,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2022-11-16 12:15:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3627. [2022-11-16 12:15:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3625 states have (on average 1.4915862068965517) internal successors, (5407), 3626 states have internal predecessors, (5407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 5407 transitions. [2022-11-16 12:15:23,316 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 5407 transitions. Word has length 70 [2022-11-16 12:15:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:23,316 INFO L495 AbstractCegarLoop]: Abstraction has 3627 states and 5407 transitions. [2022-11-16 12:15:23,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 5407 transitions. [2022-11-16 12:15:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-16 12:15:23,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:23,317 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:15:23,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 12:15:23,318 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:23,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:23,318 INFO L85 PathProgramCache]: Analyzing trace with hash -673918747, now seen corresponding path program 1 times [2022-11-16 12:15:23,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:23,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281156196] [2022-11-16 12:15:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:23,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:23,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:23,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281156196] [2022-11-16 12:15:23,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281156196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:23,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:23,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:15:23,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87030402] [2022-11-16 12:15:23,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:23,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:23,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:23,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:23,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:23,424 INFO L87 Difference]: Start difference. First operand 3627 states and 5407 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:23,580 INFO L93 Difference]: Finished difference Result 4291 states and 6311 transitions. [2022-11-16 12:15:23,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:23,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-11-16 12:15:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:23,586 INFO L225 Difference]: With dead ends: 4291 [2022-11-16 12:15:23,587 INFO L226 Difference]: Without dead ends: 2969 [2022-11-16 12:15:23,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:23,594 INFO L413 NwaCegarLoop]: 1539 mSDtfsCounter, 31 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3028 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:23,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3028 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:15:23,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2969 states. [2022-11-16 12:15:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2969 to 2967. [2022-11-16 12:15:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2967 states, 2965 states have (on average 1.5156829679595278) internal successors, (4494), 2966 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:23,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 4494 transitions. [2022-11-16 12:15:23,778 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 4494 transitions. Word has length 72 [2022-11-16 12:15:23,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:23,778 INFO L495 AbstractCegarLoop]: Abstraction has 2967 states and 4494 transitions. [2022-11-16 12:15:23,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:23,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 4494 transitions. [2022-11-16 12:15:23,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 12:15:23,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:23,782 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:15:23,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:15:23,782 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:23,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:23,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1516893303, now seen corresponding path program 1 times [2022-11-16 12:15:23,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:23,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825444008] [2022-11-16 12:15:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:23,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:25,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:25,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825444008] [2022-11-16 12:15:25,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825444008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:25,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884498065] [2022-11-16 12:15:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:25,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:25,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:25,490 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:25,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:15:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:25,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:15:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:15:26,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:15:26,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884498065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:15:26,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:15:26,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 4] total 19 [2022-11-16 12:15:26,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838081679] [2022-11-16 12:15:26,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:26,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:15:26,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:26,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:15:26,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:15:26,526 INFO L87 Difference]: Start difference. First operand 2967 states and 4494 transitions. Second operand has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:32,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:32,923 INFO L93 Difference]: Finished difference Result 9702 states and 13279 transitions. [2022-11-16 12:15:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-16 12:15:32,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 0 states have call successors, (0), 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 74 [2022-11-16 12:15:32,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:32,933 INFO L225 Difference]: With dead ends: 9702 [2022-11-16 12:15:32,934 INFO L226 Difference]: Without dead ends: 9040 [2022-11-16 12:15:32,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=868, Invalid=4102, Unknown=0, NotChecked=0, Total=4970 [2022-11-16 12:15:32,939 INFO L413 NwaCegarLoop]: 1514 mSDtfsCounter, 17443 mSDsluCounter, 7845 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17443 SdHoareTripleChecker+Valid, 9359 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:32,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17443 Valid, 9359 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 12:15:32,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9040 states. [2022-11-16 12:15:34,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9040 to 7120. [2022-11-16 12:15:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7118 states have (on average 1.3699072773250913) internal successors, (9751), 7119 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 9751 transitions. [2022-11-16 12:15:34,114 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 9751 transitions. Word has length 74 [2022-11-16 12:15:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:34,115 INFO L495 AbstractCegarLoop]: Abstraction has 7120 states and 9751 transitions. [2022-11-16 12:15:34,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 9751 transitions. [2022-11-16 12:15:34,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 12:15:34,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:34,117 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:15:34,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:34,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:34,326 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:34,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:34,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1010952072, now seen corresponding path program 1 times [2022-11-16 12:15:34,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:34,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592372985] [2022-11-16 12:15:34,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:34,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:34,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:34,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592372985] [2022-11-16 12:15:34,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592372985] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:34,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181727914] [2022-11-16 12:15:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:34,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:34,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:34,757 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:34,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:15:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:34,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:15:34,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:35,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:36,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181727914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:15:36,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:15:36,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-16 12:15:36,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777881051] [2022-11-16 12:15:36,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:36,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:15:36,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:15:36,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:15:36,663 INFO L87 Difference]: Start difference. First operand 7120 states and 9751 transitions. Second operand has 24 states, 24 states have (on average 7.625) internal successors, (183), 23 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:43,150 INFO L93 Difference]: Finished difference Result 30357 states and 39739 transitions. [2022-11-16 12:15:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 12:15:43,150 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.625) internal successors, (183), 23 states have internal predecessors, (183), 0 states have call successors, (0), 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 75 [2022-11-16 12:15:43,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:43,180 INFO L225 Difference]: With dead ends: 30357 [2022-11-16 12:15:43,180 INFO L226 Difference]: Without dead ends: 25584 [2022-11-16 12:15:43,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=627, Invalid=2343, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 12:15:43,191 INFO L413 NwaCegarLoop]: 1544 mSDtfsCounter, 16341 mSDsluCounter, 8303 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16341 SdHoareTripleChecker+Valid, 9847 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:43,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16341 Valid, 9847 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:15:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25584 states. [2022-11-16 12:15:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25584 to 19506. [2022-11-16 12:15:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19506 states, 19504 states have (on average 1.2871718621821164) internal successors, (25105), 19505 states have internal predecessors, (25105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19506 states to 19506 states and 25105 transitions. [2022-11-16 12:15:46,799 INFO L78 Accepts]: Start accepts. Automaton has 19506 states and 25105 transitions. Word has length 75 [2022-11-16 12:15:46,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:46,800 INFO L495 AbstractCegarLoop]: Abstraction has 19506 states and 25105 transitions. [2022-11-16 12:15:46,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.625) internal successors, (183), 23 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 19506 states and 25105 transitions. [2022-11-16 12:15:46,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 12:15:46,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:46,803 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:15:46,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:47,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:47,010 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:47,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:47,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2028388102, now seen corresponding path program 1 times [2022-11-16 12:15:47,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:47,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602383073] [2022-11-16 12:15:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:47,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:47,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:47,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602383073] [2022-11-16 12:15:47,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602383073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:47,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352572134] [2022-11-16 12:15:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:47,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:47,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:47,446 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:47,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:15:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:47,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:15:47,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:48,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:49,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352572134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:15:49,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:15:49,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-11-16 12:15:49,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594640568] [2022-11-16 12:15:49,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:49,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:15:49,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:49,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:15:49,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:15:49,680 INFO L87 Difference]: Start difference. First operand 19506 states and 25105 transitions. Second operand has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 22 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:55,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:55,816 INFO L93 Difference]: Finished difference Result 39101 states and 49046 transitions. [2022-11-16 12:15:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:15:55,819 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 22 states have internal predecessors, (179), 0 states have call successors, (0), 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 75 [2022-11-16 12:15:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:55,847 INFO L225 Difference]: With dead ends: 39101 [2022-11-16 12:15:55,847 INFO L226 Difference]: Without dead ends: 24800 [2022-11-16 12:15:55,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:15:55,860 INFO L413 NwaCegarLoop]: 1514 mSDtfsCounter, 12756 mSDsluCounter, 4755 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12756 SdHoareTripleChecker+Valid, 6269 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:55,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12756 Valid, 6269 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:15:55,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24800 states. [2022-11-16 12:15:59,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24800 to 18802. [2022-11-16 12:15:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18802 states, 18800 states have (on average 1.2726063829787233) internal successors, (23925), 18801 states have internal predecessors, (23925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18802 states to 18802 states and 23925 transitions. [2022-11-16 12:15:59,443 INFO L78 Accepts]: Start accepts. Automaton has 18802 states and 23925 transitions. Word has length 75 [2022-11-16 12:15:59,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:59,444 INFO L495 AbstractCegarLoop]: Abstraction has 18802 states and 23925 transitions. [2022-11-16 12:15:59,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 22 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:59,444 INFO L276 IsEmpty]: Start isEmpty. Operand 18802 states and 23925 transitions. [2022-11-16 12:15:59,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-16 12:15:59,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:59,447 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:15:59,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:59,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:59,654 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:59,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:59,654 INFO L85 PathProgramCache]: Analyzing trace with hash -268185879, now seen corresponding path program 1 times [2022-11-16 12:15:59,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:59,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764155637] [2022-11-16 12:15:59,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:59,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:00,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:00,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764155637] [2022-11-16 12:16:00,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764155637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:00,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100013869] [2022-11-16 12:16:00,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:00,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:00,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:00,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:00,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:16:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:00,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:16:00,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:01,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:16:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:02,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100013869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:16:02,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:16:02,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 28 [2022-11-16 12:16:02,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381640313] [2022-11-16 12:16:02,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:16:02,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:16:02,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:02,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:16:02,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:16:02,849 INFO L87 Difference]: Start difference. First operand 18802 states and 23925 transitions. Second operand has 28 states, 28 states have (on average 7.0) internal successors, (196), 28 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:16,799 INFO L93 Difference]: Finished difference Result 62273 states and 77223 transitions. [2022-11-16 12:16:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:16:16,800 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.0) internal successors, (196), 28 states have internal predecessors, (196), 0 states have call successors, (0), 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 76 [2022-11-16 12:16:16,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:16,860 INFO L225 Difference]: With dead ends: 62273 [2022-11-16 12:16:16,860 INFO L226 Difference]: Without dead ends: 47992 [2022-11-16 12:16:16,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=451, Invalid=1441, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 12:16:16,873 INFO L413 NwaCegarLoop]: 1537 mSDtfsCounter, 10933 mSDsluCounter, 5061 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10933 SdHoareTripleChecker+Valid, 6598 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:16,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10933 Valid, 6598 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:16:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47992 states. [2022-11-16 12:16:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47992 to 35338. [2022-11-16 12:16:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35338 states, 35336 states have (on average 1.2405195834276659) internal successors, (43835), 35337 states have internal predecessors, (43835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:26,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35338 states to 35338 states and 43835 transitions. [2022-11-16 12:16:26,472 INFO L78 Accepts]: Start accepts. Automaton has 35338 states and 43835 transitions. Word has length 76 [2022-11-16 12:16:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:26,478 INFO L495 AbstractCegarLoop]: Abstraction has 35338 states and 43835 transitions. [2022-11-16 12:16:26,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.0) internal successors, (196), 28 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:26,479 INFO L276 IsEmpty]: Start isEmpty. Operand 35338 states and 43835 transitions. [2022-11-16 12:16:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 12:16:26,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:26,482 INFO L195 NwaCegarLoop]: trace histogram [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 12:16:26,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:26,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 12:16:26,687 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:16:26,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:26,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1113650506, now seen corresponding path program 1 times [2022-11-16 12:16:26,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:26,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338025019] [2022-11-16 12:16:26,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:26,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:28,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:28,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338025019] [2022-11-16 12:16:28,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338025019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:28,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106373014] [2022-11-16 12:16:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:28,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:28,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:28,221 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:28,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_463602c7-9890-4685-ab61-65fdd6745a28/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:16:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:28,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:16:28,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:30,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:16:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:33,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106373014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:16:33,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:16:33,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 16] total 40 [2022-11-16 12:16:33,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814986542] [2022-11-16 12:16:33,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:16:33,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 12:16:33,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:33,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 12:16:33,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 12:16:33,536 INFO L87 Difference]: Start difference. First operand 35338 states and 43835 transitions. Second operand has 40 states, 40 states have (on average 5.375) internal successors, (215), 40 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 12:17:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:26,087 INFO L93 Difference]: Finished difference Result 91509 states and 111160 transitions. [2022-11-16 12:17:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-16 12:17:26,087 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.375) internal successors, (215), 40 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 77 [2022-11-16 12:17:26,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:26,194 INFO L225 Difference]: With dead ends: 91509 [2022-11-16 12:17:26,194 INFO L226 Difference]: Without dead ends: 73999 [2022-11-16 12:17:26,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 122 SyntacticMatches, 5 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9568 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=5342, Invalid=20098, Unknown=0, NotChecked=0, Total=25440 [2022-11-16 12:17:26,220 INFO L413 NwaCegarLoop]: 1630 mSDtfsCounter, 15689 mSDsluCounter, 25216 mSDsCounter, 0 mSdLazyCounter, 2797 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15689 SdHoareTripleChecker+Valid, 26846 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:26,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15689 Valid, 26846 Invalid, 2954 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [157 Valid, 2797 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-16 12:17:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73999 states.