./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label07.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_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/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_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label07.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/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_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/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 bcaadc0834b1e1668dc1393f3526c5eee7053e110c3b9c83c6fc0a5a0bac3de4 --- 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 10:20:07,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:20:07,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:20:07,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:20:07,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:20:07,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:20:07,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:20:07,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:20:07,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:20:07,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:20:07,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:20:07,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:20:07,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:20:07,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:20:07,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:20:07,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:20:07,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:20:07,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:20:07,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:20:07,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:20:07,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:20:07,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:20:07,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:20:07,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:20:07,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:20:07,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:20:07,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:20:07,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:20:07,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:20:07,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:20:07,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:20:07,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:20:07,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:20:07,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:20:07,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:20:07,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:20:07,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:20:07,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:20:07,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:20:07,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:20:07,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:20:07,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:20:07,701 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:20:07,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:20:07,702 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:20:07,702 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:20:07,703 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:20:07,704 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:20:07,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:20:07,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:20:07,705 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:20:07,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:20:07,707 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:20:07,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:20:07,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:20:07,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:20:07,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:20:07,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:20:07,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:20:07,710 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:20:07,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:20:07,710 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:20:07,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:20:07,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:20:07,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:20:07,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:20:07,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:20:07,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:20:07,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:20:07,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:20:07,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:20:07,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:20:07,714 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:20:07,714 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:20:07,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:20:07,715 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_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bcaadc0834b1e1668dc1393f3526c5eee7053e110c3b9c83c6fc0a5a0bac3de4 [2022-10-17 10:20:08,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:20:08,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:20:08,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:20:08,078 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:20:08,079 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:20:08,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/eca-rers2012/Problem12_label07.c [2022-10-17 10:20:08,158 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/bin/uautomizer-J5u9QxTXDZ/data/6e6b5860b/a133b9e2304741bba0f7e787952f21dc/FLAG22aa134e4 [2022-10-17 10:20:09,069 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:20:09,070 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/sv-benchmarks/c/eca-rers2012/Problem12_label07.c [2022-10-17 10:20:09,103 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/bin/uautomizer-J5u9QxTXDZ/data/6e6b5860b/a133b9e2304741bba0f7e787952f21dc/FLAG22aa134e4 [2022-10-17 10:20:09,505 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/bin/uautomizer-J5u9QxTXDZ/data/6e6b5860b/a133b9e2304741bba0f7e787952f21dc [2022-10-17 10:20:09,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:20:09,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:20:09,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:20:09,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:20:09,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:20:09,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:20:09" (1/1) ... [2022-10-17 10:20:09,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33eb306e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:09, skipping insertion in model container [2022-10-17 10:20:09,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:20:09" (1/1) ... [2022-10-17 10:20:09,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:20:09,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:20:09,932 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_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/sv-benchmarks/c/eca-rers2012/Problem12_label07.c[1203,1216] [2022-10-17 10:20:11,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:20:11,218 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:20:11,237 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_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/sv-benchmarks/c/eca-rers2012/Problem12_label07.c[1203,1216] [2022-10-17 10:20:11,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:20:11,998 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:20:11,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:11 WrapperNode [2022-10-17 10:20:11,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:20:12,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:20:12,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:20:12,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:20:12,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:11" (1/1) ... [2022-10-17 10:20:12,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:11" (1/1) ... [2022-10-17 10:20:12,545 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-10-17 10:20:12,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:20:12,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:20:12,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:20:12,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:20:12,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:11" (1/1) ... [2022-10-17 10:20:12,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:11" (1/1) ... [2022-10-17 10:20:12,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:11" (1/1) ... [2022-10-17 10:20:12,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:11" (1/1) ... [2022-10-17 10:20:12,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:11" (1/1) ... [2022-10-17 10:20:13,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:11" (1/1) ... [2022-10-17 10:20:13,187 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:11" (1/1) ... [2022-10-17 10:20:13,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:11" (1/1) ... [2022-10-17 10:20:13,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:20:13,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:20:13,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:20:13,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:20:13,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:11" (1/1) ... [2022-10-17 10:20:13,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:20:13,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:13,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:20:13,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10b759b3-b7c0-4a11-9e2a-bfbe7b2976e8/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:20:13,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:20:13,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:20:13,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:20:13,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:20:13,540 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:20:13,542 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:20:19,091 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:20:19,124 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:20:19,124 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:20:19,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:20:19 BoogieIcfgContainer [2022-10-17 10:20:19,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:20:19,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:20:19,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:20:19,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:20:19,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:20:09" (1/3) ... [2022-10-17 10:20:19,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b4f14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:20:19, skipping insertion in model container [2022-10-17 10:20:19,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:11" (2/3) ... [2022-10-17 10:20:19,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b4f14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:20:19, skipping insertion in model container [2022-10-17 10:20:19,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:20:19" (3/3) ... [2022-10-17 10:20:19,141 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label07.c [2022-10-17 10:20:19,162 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:20:19,162 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:20:19,244 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:20:19,252 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;@48c00092, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:20:19,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:20:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 10:20:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 10:20:19,269 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:19,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 10:20:19,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:19,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:19,277 INFO L85 PathProgramCache]: Analyzing trace with hash 889694410, now seen corresponding path program 1 times [2022-10-17 10:20:19,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:19,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793568705] [2022-10-17 10:20:19,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:19,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:19,506 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 10:20:19,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:19,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793568705] [2022-10-17 10:20:19,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793568705] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:19,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:19,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:20:19,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66078649] [2022-10-17 10:20:19,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:19,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:20:19,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:19,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:20:19,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:20:19,569 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 10:20:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:24,668 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2022-10-17 10:20:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:20:24,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-10-17 10:20:24,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:24,700 INFO L225 Difference]: With dead ends: 2388 [2022-10-17 10:20:24,700 INFO L226 Difference]: Without dead ends: 1506 [2022-10-17 10:20:24,708 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 10:20:24,712 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 891 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:24,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 156 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-10-17 10:20:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-10-17 10:20:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-10-17 10:20:24,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.8458471760797341) internal successors, (2778), 1505 states have internal predecessors, (2778), 0 states have call successors, (0), 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 10:20:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2778 transitions. [2022-10-17 10:20:24,854 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2778 transitions. Word has length 6 [2022-10-17 10:20:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:24,854 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2778 transitions. [2022-10-17 10:20:24,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 10:20:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2778 transitions. [2022-10-17 10:20:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-10-17 10:20:24,858 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:24,858 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] [2022-10-17 10:20:24,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:20:24,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1953101570, now seen corresponding path program 1 times [2022-10-17 10:20:24,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:24,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463641778] [2022-10-17 10:20:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:24,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:25,262 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 10:20:25,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:25,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463641778] [2022-10-17 10:20:25,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463641778] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:25,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:25,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:20:25,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388579408] [2022-10-17 10:20:25,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:25,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:20:25,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:25,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:20:25,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:20:25,267 INFO L87 Difference]: Start difference. First operand 1506 states and 2778 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 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 10:20:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:29,784 INFO L93 Difference]: Finished difference Result 3761 states and 6893 transitions. [2022-10-17 10:20:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:20:29,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-10-17 10:20:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:29,803 INFO L225 Difference]: With dead ends: 3761 [2022-10-17 10:20:29,804 INFO L226 Difference]: Without dead ends: 2257 [2022-10-17 10:20:29,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:20:29,817 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:29,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 448 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-10-17 10:20:29,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2022-10-17 10:20:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2022-10-17 10:20:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.4419326241134751) internal successors, (3253), 2256 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3253 transitions. [2022-10-17 10:20:29,903 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3253 transitions. Word has length 75 [2022-10-17 10:20:29,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:29,907 INFO L495 AbstractCegarLoop]: Abstraction has 2257 states and 3253 transitions. [2022-10-17 10:20:29,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 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 10:20:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3253 transitions. [2022-10-17 10:20:29,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-10-17 10:20:29,914 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:29,915 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] [2022-10-17 10:20:29,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:20:29,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:29,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:29,921 INFO L85 PathProgramCache]: Analyzing trace with hash 15169337, now seen corresponding path program 1 times [2022-10-17 10:20:29,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:29,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467268828] [2022-10-17 10:20:29,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:29,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:30,159 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 10:20:30,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:30,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467268828] [2022-10-17 10:20:30,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467268828] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:30,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:30,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:20:30,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556247760] [2022-10-17 10:20:30,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:30,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:20:30,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:30,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:20:30,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:20:30,165 INFO L87 Difference]: Start difference. First operand 2257 states and 3253 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 10:20:34,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:34,761 INFO L93 Difference]: Finished difference Result 6765 states and 9754 transitions. [2022-10-17 10:20:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:20:34,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-10-17 10:20:34,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:34,791 INFO L225 Difference]: With dead ends: 6765 [2022-10-17 10:20:34,791 INFO L226 Difference]: Without dead ends: 4510 [2022-10-17 10:20:34,795 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 10:20:34,797 INFO L413 NwaCegarLoop]: 1370 mSDtfsCounter, 750 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:34,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 1378 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-10-17 10:20:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2022-10-17 10:20:34,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2022-10-17 10:20:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 1.3714792636948325) internal successors, (6184), 4509 states have internal predecessors, (6184), 0 states have call successors, (0), 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 10:20:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 6184 transitions. [2022-10-17 10:20:34,934 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 6184 transitions. Word has length 77 [2022-10-17 10:20:34,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:34,937 INFO L495 AbstractCegarLoop]: Abstraction has 4510 states and 6184 transitions. [2022-10-17 10:20:34,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 10:20:34,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 6184 transitions. [2022-10-17 10:20:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-10-17 10:20:34,945 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:34,945 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] [2022-10-17 10:20:34,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:20:34,946 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:34,950 INFO L85 PathProgramCache]: Analyzing trace with hash -440362518, now seen corresponding path program 1 times [2022-10-17 10:20:34,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:34,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227968954] [2022-10-17 10:20:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:34,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:35,267 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 10:20:35,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:35,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227968954] [2022-10-17 10:20:35,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227968954] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:35,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:35,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:20:35,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289706708] [2022-10-17 10:20:35,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:35,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:20:35,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:35,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:20:35,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:20:35,270 INFO L87 Difference]: Start difference. First operand 4510 states and 6184 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)