./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label46.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label46.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ --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 541e7f2d0384c0fe15c71d37dc3b6d915f82dde67f224d182d5f6431c66d5181 --- 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-dbf71c6-m [2022-10-17 11:00:35,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:00:35,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:00:35,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:00:35,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:00:35,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:00:35,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:00:35,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:00:35,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:00:35,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:00:35,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:00:35,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:00:35,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:00:35,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:00:35,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:00:35,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:00:35,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:00:35,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:00:35,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:00:35,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:00:35,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:00:35,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:00:35,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:00:35,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:00:35,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:00:35,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:00:35,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:00:35,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:00:35,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:00:35,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:00:35,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:00:35,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:00:35,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:00:35,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:00:35,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:00:35,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:00:35,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:00:35,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:00:35,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:00:35,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:00:35,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:00:35,486 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 11:00:35,540 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:00:35,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:00:35,541 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:00:35,541 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:00:35,542 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:00:35,542 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:00:35,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:00:35,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:00:35,543 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:00:35,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:00:35,545 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:00:35,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:00:35,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:00:35,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:00:35,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:00:35,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:00:35,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:00:35,547 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:00:35,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:00:35,547 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:00:35,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:00:35,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:00:35,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:00:35,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:00:35,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:00:35,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:00:35,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:00:35,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:00:35,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:00:35,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:00:35,550 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:00:35,550 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:00:35,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:00:35,550 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_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 541e7f2d0384c0fe15c71d37dc3b6d915f82dde67f224d182d5f6431c66d5181 [2022-10-17 11:00:35,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:00:35,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:00:35,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:00:35,934 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:00:35,935 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:00:35,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/eca-rers2012/Problem03_label46.c [2022-10-17 11:00:36,000 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/data/a75a49aef/216626102ca8418d95d6cfb242e1cf99/FLAGea83ac40c [2022-10-17 11:00:36,724 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:00:36,725 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/sv-benchmarks/c/eca-rers2012/Problem03_label46.c [2022-10-17 11:00:36,746 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/data/a75a49aef/216626102ca8418d95d6cfb242e1cf99/FLAGea83ac40c [2022-10-17 11:00:36,866 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/data/a75a49aef/216626102ca8418d95d6cfb242e1cf99 [2022-10-17 11:00:36,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:00:36,876 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:00:36,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:00:36,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:00:36,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:00:36,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:00:36" (1/1) ... [2022-10-17 11:00:36,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8931934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:36, skipping insertion in model container [2022-10-17 11:00:36,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:00:36" (1/1) ... [2022-10-17 11:00:36,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:00:36,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:00:37,646 WARN L230 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_d4fc5c84-c051-4b70-b17a-714d286c065a/sv-benchmarks/c/eca-rers2012/Problem03_label46.c[59207,59220] [2022-10-17 11:00:37,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:00:37,684 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:00:38,046 WARN L230 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_d4fc5c84-c051-4b70-b17a-714d286c065a/sv-benchmarks/c/eca-rers2012/Problem03_label46.c[59207,59220] [2022-10-17 11:00:38,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:00:38,082 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:00:38,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:38 WrapperNode [2022-10-17 11:00:38,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:00:38,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:00:38,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:00:38,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:00:38,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:38" (1/1) ... [2022-10-17 11:00:38,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:38" (1/1) ... [2022-10-17 11:00:38,266 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-10-17 11:00:38,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:00:38,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:00:38,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:00:38,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:00:38,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:38" (1/1) ... [2022-10-17 11:00:38,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:38" (1/1) ... [2022-10-17 11:00:38,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:38" (1/1) ... [2022-10-17 11:00:38,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:38" (1/1) ... [2022-10-17 11:00:38,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:38" (1/1) ... [2022-10-17 11:00:38,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:38" (1/1) ... [2022-10-17 11:00:38,452 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:38" (1/1) ... [2022-10-17 11:00:38,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:38" (1/1) ... [2022-10-17 11:00:38,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:00:38,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:00:38,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:00:38,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:00:38,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:38" (1/1) ... [2022-10-17 11:00:38,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:00:38,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:38,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:00:38,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:00:38,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:00:38,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:00:38,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:00:38,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:00:38,709 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:00:38,711 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:00:40,792 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:00:40,806 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:00:40,806 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 11:00:40,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:00:40 BoogieIcfgContainer [2022-10-17 11:00:40,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:00:40,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:00:40,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:00:40,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:00:40,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:00:36" (1/3) ... [2022-10-17 11:00:40,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3c4a1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:00:40, skipping insertion in model container [2022-10-17 11:00:40,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:38" (2/3) ... [2022-10-17 11:00:40,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3c4a1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:00:40, skipping insertion in model container [2022-10-17 11:00:40,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:00:40" (3/3) ... [2022-10-17 11:00:40,821 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label46.c [2022-10-17 11:00:40,843 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:00:40,843 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 11:00:40,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:00:40,923 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;@6c954347, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:00:40,923 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 11:00:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:40,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-10-17 11:00:40,955 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:40,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:40,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:40,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1730728613, now seen corresponding path program 1 times [2022-10-17 11:00:40,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:40,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49356621] [2022-10-17 11:00:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:40,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:00:42,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:42,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49356621] [2022-10-17 11:00:42,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49356621] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:42,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:00:42,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:00:42,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3441932] [2022-10-17 11:00:42,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:42,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:00:42,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:42,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:00:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:00:42,276 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:43,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:43,663 INFO L93 Difference]: Finished difference Result 835 states and 1478 transitions. [2022-10-17 11:00:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:00:43,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2022-10-17 11:00:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:43,702 INFO L225 Difference]: With dead ends: 835 [2022-10-17 11:00:43,703 INFO L226 Difference]: Without dead ends: 456 [2022-10-17 11:00:43,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:00:43,715 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 103 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:43,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 161 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-10-17 11:00:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-10-17 11:00:43,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 451. [2022-10-17 11:00:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5622222222222222) internal successors, (703), 450 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 703 transitions. [2022-10-17 11:00:43,826 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 703 transitions. Word has length 185 [2022-10-17 11:00:43,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:43,828 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 703 transitions. [2022-10-17 11:00:43,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 703 transitions. [2022-10-17 11:00:43,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-10-17 11:00:43,843 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:43,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:43,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:00:43,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:43,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1408358515, now seen corresponding path program 1 times [2022-10-17 11:00:43,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:43,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762425793] [2022-10-17 11:00:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:43,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:00:44,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:44,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762425793] [2022-10-17 11:00:44,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762425793] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:44,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:00:44,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:00:44,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016017169] [2022-10-17 11:00:44,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:44,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:00:44,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:44,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:00:44,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:00:44,481 INFO L87 Difference]: Start difference. First operand 451 states and 703 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:45,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:45,541 INFO L93 Difference]: Finished difference Result 1340 states and 2094 transitions. [2022-10-17 11:00:45,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:00:45,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 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 191 [2022-10-17 11:00:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:45,549 INFO L225 Difference]: With dead ends: 1340 [2022-10-17 11:00:45,550 INFO L226 Difference]: Without dead ends: 891 [2022-10-17 11:00:45,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:00:45,555 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:45,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 154 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 11:00:45,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-10-17 11:00:45,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 887. [2022-10-17 11:00:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 1.5474040632054176) internal successors, (1371), 886 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1371 transitions. [2022-10-17 11:00:45,631 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1371 transitions. Word has length 191 [2022-10-17 11:00:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:45,632 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1371 transitions. [2022-10-17 11:00:45,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1371 transitions. [2022-10-17 11:00:45,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-10-17 11:00:45,642 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:45,642 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:45,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 11:00:45,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:45,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:45,644 INFO L85 PathProgramCache]: Analyzing trace with hash 567972033, now seen corresponding path program 1 times [2022-10-17 11:00:45,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:45,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228881817] [2022-10-17 11:00:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:45,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:00:46,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:46,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228881817] [2022-10-17 11:00:46,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228881817] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:46,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:00:46,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:00:46,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962009745] [2022-10-17 11:00:46,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:46,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:00:46,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:46,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:00:46,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:00:46,311 INFO L87 Difference]: Start difference. First operand 887 states and 1371 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:47,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:47,469 INFO L93 Difference]: Finished difference Result 2612 states and 4042 transitions. [2022-10-17 11:00:47,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:00:47,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 195 [2022-10-17 11:00:47,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:47,482 INFO L225 Difference]: With dead ends: 2612 [2022-10-17 11:00:47,482 INFO L226 Difference]: Without dead ends: 1727 [2022-10-17 11:00:47,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:00:47,493 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 234 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:47,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 114 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 11:00:47,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-10-17 11:00:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1725. [2022-10-17 11:00:47,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.4715777262180973) internal successors, (2537), 1724 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:47,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2537 transitions. [2022-10-17 11:00:47,571 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2537 transitions. Word has length 195 [2022-10-17 11:00:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:47,572 INFO L495 AbstractCegarLoop]: Abstraction has 1725 states and 2537 transitions. [2022-10-17 11:00:47,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:47,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2537 transitions. [2022-10-17 11:00:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-10-17 11:00:47,587 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:47,588 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:47,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 11:00:47,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:47,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:47,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1214228354, now seen corresponding path program 1 times [2022-10-17 11:00:47,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:47,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680919669] [2022-10-17 11:00:47,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:47,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:00:47,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:47,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680919669] [2022-10-17 11:00:47,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680919669] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:47,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:00:47,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:00:47,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989648642] [2022-10-17 11:00:47,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:47,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:00:47,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:47,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:00:47,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:00:47,908 INFO L87 Difference]: Start difference. First operand 1725 states and 2537 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:48,930 INFO L93 Difference]: Finished difference Result 5091 states and 7490 transitions. [2022-10-17 11:00:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:00:48,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 198 [2022-10-17 11:00:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:48,952 INFO L225 Difference]: With dead ends: 5091 [2022-10-17 11:00:48,952 INFO L226 Difference]: Without dead ends: 3368 [2022-10-17 11:00:48,955 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 [2022-10-17 11:00:48,956 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 250 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:48,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 157 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 11:00:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2022-10-17 11:00:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 3366. [2022-10-17 11:00:49,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 1.4050520059435363) internal successors, (4728), 3365 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4728 transitions. [2022-10-17 11:00:49,062 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4728 transitions. Word has length 198 [2022-10-17 11:00:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:49,062 INFO L495 AbstractCegarLoop]: Abstraction has 3366 states and 4728 transitions. [2022-10-17 11:00:49,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4728 transitions. [2022-10-17 11:00:49,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-10-17 11:00:49,072 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:49,073 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:49,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 11:00:49,073 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:49,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:49,074 INFO L85 PathProgramCache]: Analyzing trace with hash 497552120, now seen corresponding path program 1 times [2022-10-17 11:00:49,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:49,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702942922] [2022-10-17 11:00:49,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:49,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-10-17 11:00:49,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:49,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702942922] [2022-10-17 11:00:49,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702942922] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:49,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:00:49,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:00:49,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962122782] [2022-10-17 11:00:49,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:49,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:00:49,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:49,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:00:49,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:00:49,550 INFO L87 Difference]: Start difference. First operand 3366 states and 4728 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:50,646 INFO L93 Difference]: Finished difference Result 9999 states and 14055 transitions. [2022-10-17 11:00:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:00:50,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 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 218 [2022-10-17 11:00:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:50,687 INFO L225 Difference]: With dead ends: 9999 [2022-10-17 11:00:50,687 INFO L226 Difference]: Without dead ends: 6635 [2022-10-17 11:00:50,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:00:50,697 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 235 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:50,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 133 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 11:00:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2022-10-17 11:00:50,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 6626. [2022-10-17 11:00:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6626 states, 6625 states have (on average 1.3542641509433961) internal successors, (8972), 6625 states have internal predecessors, (8972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6626 states to 6626 states and 8972 transitions. [2022-10-17 11:00:50,903 INFO L78 Accepts]: Start accepts. Automaton has 6626 states and 8972 transitions. Word has length 218 [2022-10-17 11:00:50,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:50,905 INFO L495 AbstractCegarLoop]: Abstraction has 6626 states and 8972 transitions. [2022-10-17 11:00:50,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 6626 states and 8972 transitions. [2022-10-17 11:00:50,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-10-17 11:00:50,926 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:50,926 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:50,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 11:00:50,927 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:50,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:50,928 INFO L85 PathProgramCache]: Analyzing trace with hash 404178270, now seen corresponding path program 1 times [2022-10-17 11:00:50,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:50,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410604376] [2022-10-17 11:00:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:50,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-10-17 11:00:51,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:51,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410604376] [2022-10-17 11:00:51,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410604376] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:00:51,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074374467] [2022-10-17 11:00:51,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:51,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:51,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:51,390 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:00:51,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 11:00:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:51,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 11:00:51,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:00:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-17 11:00:51,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:00:51,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074374467] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:51,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:00:51,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-10-17 11:00:51,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643065617] [2022-10-17 11:00:51,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:51,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:00:51,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:51,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:00:51,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:00:51,796 INFO L87 Difference]: Start difference. First operand 6626 states and 8972 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:52,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:52,302 INFO L93 Difference]: Finished difference Result 19869 states and 26907 transitions. [2022-10-17 11:00:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:00:52,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2022-10-17 11:00:52,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:52,420 INFO L225 Difference]: With dead ends: 19869 [2022-10-17 11:00:52,420 INFO L226 Difference]: Without dead ends: 13245 [2022-10-17 11:00:52,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:00:52,438 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 356 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:52,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 617 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 11:00:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13245 states. [2022-10-17 11:00:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13245 to 11594. [2022-10-17 11:00:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11594 states, 11593 states have (on average 1.3599585957043043) internal successors, (15766), 11593 states have internal predecessors, (15766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:52,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11594 states to 11594 states and 15766 transitions. [2022-10-17 11:00:52,816 INFO L78 Accepts]: Start accepts. Automaton has 11594 states and 15766 transitions. Word has length 223 [2022-10-17 11:00:52,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:52,817 INFO L495 AbstractCegarLoop]: Abstraction has 11594 states and 15766 transitions. [2022-10-17 11:00:52,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:52,817 INFO L276 IsEmpty]: Start isEmpty. Operand 11594 states and 15766 transitions. [2022-10-17 11:00:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-10-17 11:00:52,841 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:52,841 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:52,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 11:00:53,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 11:00:53,057 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:53,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:53,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1883887689, now seen corresponding path program 1 times [2022-10-17 11:00:53,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:53,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280184678] [2022-10-17 11:00:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:53,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 11:00:53,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:53,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280184678] [2022-10-17 11:00:53,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280184678] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:00:53,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255743002] [2022-10-17 11:00:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:53,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:00:53,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:53,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:00:53,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 11:00:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:54,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 11:00:54,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:00:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 11:00:54,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:00:54,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255743002] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:54,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:00:54,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-10-17 11:00:54,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822915547] [2022-10-17 11:00:54,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:54,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:00:54,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:54,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:00:54,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:00:54,358 INFO L87 Difference]: Start difference. First operand 11594 states and 15766 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:55,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:55,686 INFO L93 Difference]: Finished difference Result 32938 states and 44853 transitions. [2022-10-17 11:00:55,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:00:55,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2022-10-17 11:00:55,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:55,735 INFO L225 Difference]: With dead ends: 32938 [2022-10-17 11:00:55,736 INFO L226 Difference]: Without dead ends: 21346 [2022-10-17 11:00:55,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:00:55,757 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 55 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:55,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 418 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 11:00:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21346 states. [2022-10-17 11:00:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21346 to 20729. [2022-10-17 11:00:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20729 states, 20728 states have (on average 1.235478579698958) internal successors, (25609), 20728 states have internal predecessors, (25609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20729 states to 20729 states and 25609 transitions. [2022-10-17 11:00:56,354 INFO L78 Accepts]: Start accepts. Automaton has 20729 states and 25609 transitions. Word has length 229 [2022-10-17 11:00:56,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:56,355 INFO L495 AbstractCegarLoop]: Abstraction has 20729 states and 25609 transitions. [2022-10-17 11:00:56,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 20729 states and 25609 transitions. [2022-10-17 11:00:56,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-10-17 11:00:56,401 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:56,402 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:56,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 11:00:56,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc5c84-c051-4b70-b17a-714d286c065a/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 11:00:56,621 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:56,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:56,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1246639075, now seen corresponding path program 1 times [2022-10-17 11:00:56,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:56,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906215155] [2022-10-17 11:00:56,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:56,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 11:00:56,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:56,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906215155] [2022-10-17 11:00:56,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906215155] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:56,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:00:56,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:00:56,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532839574] [2022-10-17 11:00:56,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:56,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:00:56,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:56,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:00:56,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:00:56,948 INFO L87 Difference]: Start difference. First operand 20729 states and 25609 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:00:57,716 INFO L93 Difference]: Finished difference Result 40743 states and 50304 transitions. [2022-10-17 11:00:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:00:57,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 246 [2022-10-17 11:00:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:00:57,763 INFO L225 Difference]: With dead ends: 40743 [2022-10-17 11:00:57,763 INFO L226 Difference]: Without dead ends: 20016 [2022-10-17 11:00:57,786 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 [2022-10-17 11:00:57,787 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 11:00:57,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 11:00:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20016 states. [2022-10-17 11:00:58,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20016 to 19610. [2022-10-17 11:00:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19610 states, 19609 states have (on average 1.216125248610332) internal successors, (23847), 19609 states have internal predecessors, (23847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19610 states to 19610 states and 23847 transitions. [2022-10-17 11:00:58,251 INFO L78 Accepts]: Start accepts. Automaton has 19610 states and 23847 transitions. Word has length 246 [2022-10-17 11:00:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:00:58,252 INFO L495 AbstractCegarLoop]: Abstraction has 19610 states and 23847 transitions. [2022-10-17 11:00:58,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:00:58,253 INFO L276 IsEmpty]: Start isEmpty. Operand 19610 states and 23847 transitions. [2022-10-17 11:00:58,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-10-17 11:00:58,294 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:00:58,294 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:58,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 11:00:58,295 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:58,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:58,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1351586102, now seen corresponding path program 1 times [2022-10-17 11:00:58,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:58,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231140163] [2022-10-17 11:00:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:58,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-10-17 11:00:59,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:59,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231140163] [2022-10-17 11:00:59,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231140163] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:59,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:00:59,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:00:59,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112475805] [2022-10-17 11:00:59,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:59,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:00:59,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:59,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:00:59,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:00:59,012 INFO L87 Difference]: Start difference. First operand 19610 states and 23847 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:00,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:00,002 INFO L93 Difference]: Finished difference Result 44318 states and 53812 transitions. [2022-10-17 11:01:00,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:01:00,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 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 263 [2022-10-17 11:01:00,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:00,052 INFO L225 Difference]: With dead ends: 44318 [2022-10-17 11:01:00,052 INFO L226 Difference]: Without dead ends: 24710 [2022-10-17 11:01:00,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:00,071 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 224 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:00,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 118 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 11:01:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24710 states. [2022-10-17 11:01:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24710 to 24703. [2022-10-17 11:01:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24703 states, 24702 states have (on average 1.2094972067039107) internal successors, (29877), 24702 states have internal predecessors, (29877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24703 states to 24703 states and 29877 transitions. [2022-10-17 11:01:00,564 INFO L78 Accepts]: Start accepts. Automaton has 24703 states and 29877 transitions. Word has length 263 [2022-10-17 11:01:00,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:00,564 INFO L495 AbstractCegarLoop]: Abstraction has 24703 states and 29877 transitions. [2022-10-17 11:01:00,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:00,565 INFO L276 IsEmpty]: Start isEmpty. Operand 24703 states and 29877 transitions. [2022-10-17 11:01:00,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-10-17 11:01:00,606 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:00,607 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:00,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 11:01:00,608 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:00,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:00,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2060308471, now seen corresponding path program 1 times [2022-10-17 11:01:00,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:00,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797435809] [2022-10-17 11:01:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:00,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:01,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:01,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797435809] [2022-10-17 11:01:01,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797435809] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:01,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:01,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:01:01,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381245933] [2022-10-17 11:01:01,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:01,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:01:01,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:01,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:01:01,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:01,052 INFO L87 Difference]: Start difference. First operand 24703 states and 29877 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:02,119 INFO L93 Difference]: Finished difference Result 56304 states and 69149 transitions. [2022-10-17 11:01:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:01:02,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 275 [2022-10-17 11:01:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:02,175 INFO L225 Difference]: With dead ends: 56304 [2022-10-17 11:01:02,176 INFO L226 Difference]: Without dead ends: 31603 [2022-10-17 11:01:02,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:02,192 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 127 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:02,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 148 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 11:01:02,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31603 states.