./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b06.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc --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 64bit --witnessprinter.graph.data.programhash 3f80ae0ffd409ff2e33efb5f94d125906ee99568b94f1fb765fcd8cdc265af1c --- 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-5e519f3 [2022-11-02 21:02:20,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:02:20,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:02:20,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:02:20,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:02:20,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:02:20,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:02:20,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:02:20,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:02:20,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:02:20,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:02:20,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:02:20,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:02:20,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:02:20,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:02:20,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:02:20,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:02:20,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:02:20,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:02:20,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:02:20,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:02:20,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:02:20,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:02:20,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:02:20,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:02:20,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:02:20,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:02:20,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:02:20,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:02:20,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:02:20,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:02:20,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:02:20,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:02:20,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:02:20,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:02:20,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:02:20,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:02:20,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:02:20,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:02:20,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:02:20,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:02:20,720 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 21:02:20,757 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:02:20,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:02:20,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:02:20,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:02:20,759 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:02:20,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:02:20,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:02:20,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:02:20,760 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:02:20,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:02:20,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:02:20,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:02:20,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:02:20,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:02:20,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:02:20,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:02:20,763 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:02:20,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:02:20,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:02:20,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:02:20,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:02:20,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:02:20,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:02:20,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:02:20,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:02:20,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:02:20,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:02:20,768 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:02:20,768 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:02:20,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:02:20,768 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_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f80ae0ffd409ff2e33efb5f94d125906ee99568b94f1fb765fcd8cdc265af1c [2022-11-02 21:02:21,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:02:21,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:02:21,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:02:21,072 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:02:21,073 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:02:21,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b06.c [2022-11-02 21:02:21,157 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/data/e88ec85ea/a9c5e075cc464ddc94a4135aea7abfad/FLAGc6f588a31 [2022-11-02 21:02:21,682 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:02:21,682 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b06.c [2022-11-02 21:02:21,695 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/data/e88ec85ea/a9c5e075cc464ddc94a4135aea7abfad/FLAGc6f588a31 [2022-11-02 21:02:22,003 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/data/e88ec85ea/a9c5e075cc464ddc94a4135aea7abfad [2022-11-02 21:02:22,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:02:22,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:02:22,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:02:22,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:02:22,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:02:22,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:02:22" (1/1) ... [2022-11-02 21:02:22,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ff6284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:22, skipping insertion in model container [2022-11-02 21:02:22,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:02:22" (1/1) ... [2022-11-02 21:02:22,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:02:22,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:02:22,315 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_ae611f57-f4c2-4247-bb96-1f85832048c4/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b06.c[1107,1120] [2022-11-02 21:02:22,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:02:22,392 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:02:22,402 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_ae611f57-f4c2-4247-bb96-1f85832048c4/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b06.c[1107,1120] [2022-11-02 21:02:22,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:02:22,441 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:02:22,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:22 WrapperNode [2022-11-02 21:02:22,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:02:22,443 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:02:22,444 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:02:22,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:02:22,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:22" (1/1) ... [2022-11-02 21:02:22,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:22" (1/1) ... [2022-11-02 21:02:22,499 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 171 [2022-11-02 21:02:22,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:02:22,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:02:22,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:02:22,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:02:22,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:22" (1/1) ... [2022-11-02 21:02:22,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:22" (1/1) ... [2022-11-02 21:02:22,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:22" (1/1) ... [2022-11-02 21:02:22,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:22" (1/1) ... [2022-11-02 21:02:22,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:22" (1/1) ... [2022-11-02 21:02:22,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:22" (1/1) ... [2022-11-02 21:02:22,533 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:22" (1/1) ... [2022-11-02 21:02:22,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:22" (1/1) ... [2022-11-02 21:02:22,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:02:22,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:02:22,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:02:22,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:02:22,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:22" (1/1) ... [2022-11-02 21:02:22,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:02:22,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:22,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:02:22,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:02:22,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:02:22,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:02:22,688 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:02:22,690 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:02:23,099 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:02:23,106 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:02:23,106 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 21:02:23,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:02:23 BoogieIcfgContainer [2022-11-02 21:02:23,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:02:23,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:02:23,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:02:23,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:02:23,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:02:22" (1/3) ... [2022-11-02 21:02:23,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df4d83e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:02:23, skipping insertion in model container [2022-11-02 21:02:23,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:22" (2/3) ... [2022-11-02 21:02:23,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df4d83e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:02:23, skipping insertion in model container [2022-11-02 21:02:23,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:02:23" (3/3) ... [2022-11-02 21:02:23,137 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_b06.c [2022-11-02 21:02:23,162 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:02:23,163 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:02:23,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:02:23,247 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;@60fcab85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:02:23,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:02:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-02 21:02:23,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:23,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-02 21:02:23,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:23,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:23,279 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-02 21:02:23,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:23,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555573790] [2022-11-02 21:02:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:23,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:02:23,754 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 21:02:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 21:02:23,895 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 21:02:23,897 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 21:02:23,898 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-02 21:02:23,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:02:23,905 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-02 21:02:23,909 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 21:02:23,925 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-02 21:02:23,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 09:02:23 BoogieIcfgContainer [2022-11-02 21:02:23,932 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 21:02:23,933 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 21:02:23,933 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 21:02:23,933 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 21:02:23,934 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:02:23" (3/4) ... [2022-11-02 21:02:23,937 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-02 21:02:23,937 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 21:02:23,938 INFO L158 Benchmark]: Toolchain (without parser) took 1928.50ms. Allocated memory is still 94.4MB. Free memory was 57.4MB in the beginning and 45.4MB in the end (delta: 12.1MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. [2022-11-02 21:02:23,939 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 94.4MB. Free memory was 73.9MB in the beginning and 73.9MB in the end (delta: 49.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 21:02:23,940 INFO L158 Benchmark]: CACSL2BoogieTranslator took 429.71ms. Allocated memory is still 94.4MB. Free memory was 57.3MB in the beginning and 68.6MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 21:02:23,940 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.02ms. Allocated memory is still 94.4MB. Free memory was 68.6MB in the beginning and 65.7MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-02 21:02:23,941 INFO L158 Benchmark]: Boogie Preprocessor took 38.00ms. Allocated memory is still 94.4MB. Free memory was 65.7MB in the beginning and 63.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 21:02:23,942 INFO L158 Benchmark]: RCFGBuilder took 568.17ms. Allocated memory is still 94.4MB. Free memory was 63.9MB in the beginning and 43.9MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-02 21:02:23,942 INFO L158 Benchmark]: TraceAbstraction took 822.37ms. Allocated memory is still 94.4MB. Free memory was 43.3MB in the beginning and 45.8MB in the end (delta: -2.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 21:02:23,943 INFO L158 Benchmark]: Witness Printer took 4.49ms. Allocated memory is still 94.4MB. Free memory was 45.8MB in the beginning and 45.4MB in the end (delta: 418.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 21:02:23,947 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 94.4MB. Free memory was 73.9MB in the beginning and 73.9MB in the end (delta: 49.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 429.71ms. Allocated memory is still 94.4MB. Free memory was 57.3MB in the beginning and 68.6MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.02ms. Allocated memory is still 94.4MB. Free memory was 68.6MB in the beginning and 65.7MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.00ms. Allocated memory is still 94.4MB. Free memory was 65.7MB in the beginning and 63.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 568.17ms. Allocated memory is still 94.4MB. Free memory was 63.9MB in the beginning and 43.9MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 822.37ms. Allocated memory is still 94.4MB. Free memory was 43.3MB in the beginning and 45.8MB in the end (delta: -2.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.49ms. Allocated memory is still 94.4MB. Free memory was 45.8MB in the beginning and 45.4MB in the end (delta: 418.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 85, overapproximation of bitwiseAnd at line 63. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_11 mask_SORT_11 = (SORT_11)-1 >> (sizeof(SORT_11) * 8 - 2); [L29] const SORT_11 msb_SORT_11 = (SORT_11)1 << (2 - 1); [L31] const SORT_15 mask_SORT_15 = (SORT_15)-1 >> (sizeof(SORT_15) * 8 - 32); [L32] const SORT_15 msb_SORT_15 = (SORT_15)1 << (32 - 1); [L34] const SORT_1 var_5 = 0; [L35] const SORT_11 var_12 = 0; [L36] const SORT_15 var_17 = 2; [L37] const SORT_1 var_22 = 1; [L38] const SORT_11 var_39 = 1; [L40] SORT_1 input_2; [L41] SORT_1 input_3; [L42] SORT_1 input_4; [L43] SORT_11 input_26; [L44] SORT_11 input_40; [L45] SORT_1 input_45; [L47] SORT_1 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L48] SORT_1 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L49] SORT_11 state_13 = __VERIFIER_nondet_uchar() & mask_SORT_11; [L50] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L52] SORT_1 init_7_arg_1 = var_5; [L53] state_6 = init_7_arg_1 [L54] SORT_1 init_9_arg_1 = var_5; [L55] state_8 = init_9_arg_1 [L56] SORT_11 init_14_arg_1 = var_12; [L57] state_13 = init_14_arg_1 [L58] SORT_1 init_32_arg_1 = var_5; [L59] state_31 = init_32_arg_1 VAL [init_14_arg_1=0, init_32_arg_1=0, init_7_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_11=3, mask_SORT_15=4294967295, msb_SORT_1=1, msb_SORT_11=2, msb_SORT_15=2147483648, state_13=0, state_31=0, state_6=0, state_8=0, var_12=0, var_17=2, var_22=1, var_39=1, var_5=0] [L62] input_2 = __VERIFIER_nondet_uchar() [L63] input_2 = input_2 & mask_SORT_1 [L64] input_3 = __VERIFIER_nondet_uchar() [L65] input_3 = input_3 & mask_SORT_1 [L66] input_4 = __VERIFIER_nondet_uchar() [L67] input_26 = __VERIFIER_nondet_uchar() [L68] input_40 = __VERIFIER_nondet_uchar() [L69] input_45 = __VERIFIER_nondet_uchar() [L72] SORT_1 var_10_arg_0 = state_6; [L73] SORT_1 var_10_arg_1 = state_8; [L74] SORT_1 var_10 = var_10_arg_0 == var_10_arg_1; [L75] SORT_11 var_16_arg_0 = state_13; [L76] var_16_arg_0 = var_16_arg_0 & mask_SORT_11 [L77] SORT_15 var_16 = var_16_arg_0; [L78] SORT_15 var_18_arg_0 = var_16; [L79] SORT_15 var_18_arg_1 = var_17; [L80] SORT_1 var_18 = var_18_arg_0 != var_18_arg_1; [L81] SORT_1 var_19_arg_0 = var_10; [L82] SORT_1 var_19_arg_1 = var_18; [L83] SORT_1 var_19 = var_19_arg_0 & var_19_arg_1; [L84] SORT_1 var_23_arg_0 = var_19; [L85] SORT_1 var_23 = ~var_23_arg_0; [L86] SORT_1 var_24_arg_0 = var_22; [L87] SORT_1 var_24_arg_1 = var_23; [L88] SORT_1 var_24 = var_24_arg_0 & var_24_arg_1; [L89] var_24 = var_24 & mask_SORT_1 [L90] SORT_1 bad_25_arg_0 = var_24; [L91] CALL __VERIFIER_assert(!(bad_25_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-02 21:02:24,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc --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 64bit --witnessprinter.graph.data.programhash 3f80ae0ffd409ff2e33efb5f94d125906ee99568b94f1fb765fcd8cdc265af1c --- 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-5e519f3 [2022-11-02 21:02:26,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:02:26,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:02:26,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:02:26,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:02:26,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:02:26,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:02:26,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:02:26,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:02:26,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:02:26,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:02:26,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:02:26,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:02:26,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:02:26,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:02:26,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:02:26,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:02:26,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:02:26,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:02:26,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:02:26,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:02:26,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:02:26,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:02:26,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:02:26,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:02:26,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:02:26,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:02:26,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:02:26,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:02:26,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:02:26,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:02:26,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:02:26,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:02:26,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:02:26,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:02:26,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:02:26,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:02:26,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:02:26,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:02:26,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:02:26,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:02:26,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-02 21:02:26,562 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:02:26,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:02:26,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:02:26,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:02:26,565 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:02:26,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:02:26,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:02:26,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:02:26,567 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:02:26,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:02:26,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:02:26,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:02:26,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:02:26,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:02:26,570 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 21:02:26,570 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 21:02:26,571 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 21:02:26,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:02:26,571 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:02:26,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:02:26,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:02:26,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:02:26,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:02:26,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:02:26,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:02:26,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:02:26,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:02:26,574 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 21:02:26,574 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 21:02:26,575 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:02:26,575 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:02:26,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:02:26,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 21:02:26,576 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f80ae0ffd409ff2e33efb5f94d125906ee99568b94f1fb765fcd8cdc265af1c [2022-11-02 21:02:27,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:02:27,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:02:27,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:02:27,039 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:02:27,040 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:02:27,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b06.c [2022-11-02 21:02:27,112 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/data/897ca1e68/a3340ad0408c4c14b28ec17d7a1b711e/FLAG76ae869df [2022-11-02 21:02:27,622 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:02:27,623 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b06.c [2022-11-02 21:02:27,631 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/data/897ca1e68/a3340ad0408c4c14b28ec17d7a1b711e/FLAG76ae869df [2022-11-02 21:02:27,983 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/data/897ca1e68/a3340ad0408c4c14b28ec17d7a1b711e [2022-11-02 21:02:27,987 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:02:27,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:02:27,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:02:27,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:02:27,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:02:28,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:02:27" (1/1) ... [2022-11-02 21:02:28,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e77ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:28, skipping insertion in model container [2022-11-02 21:02:28,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:02:27" (1/1) ... [2022-11-02 21:02:28,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:02:28,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:02:28,245 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_ae611f57-f4c2-4247-bb96-1f85832048c4/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b06.c[1107,1120] [2022-11-02 21:02:28,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:02:28,336 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:02:28,373 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_ae611f57-f4c2-4247-bb96-1f85832048c4/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b06.c[1107,1120] [2022-11-02 21:02:28,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:02:28,432 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:02:28,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:28 WrapperNode [2022-11-02 21:02:28,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:02:28,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:02:28,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:02:28,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:02:28,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:28" (1/1) ... [2022-11-02 21:02:28,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:28" (1/1) ... [2022-11-02 21:02:28,504 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 171 [2022-11-02 21:02:28,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:02:28,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:02:28,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:02:28,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:02:28,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:28" (1/1) ... [2022-11-02 21:02:28,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:28" (1/1) ... [2022-11-02 21:02:28,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:28" (1/1) ... [2022-11-02 21:02:28,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:28" (1/1) ... [2022-11-02 21:02:28,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:28" (1/1) ... [2022-11-02 21:02:28,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:28" (1/1) ... [2022-11-02 21:02:28,535 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:28" (1/1) ... [2022-11-02 21:02:28,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:28" (1/1) ... [2022-11-02 21:02:28,540 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:02:28,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:02:28,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:02:28,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:02:28,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:28" (1/1) ... [2022-11-02 21:02:28,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:02:28,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:28,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:02:28,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:02:28,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:02:28,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:02:28,711 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:02:28,713 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:02:29,133 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:02:29,140 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:02:29,141 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 21:02:29,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:02:29 BoogieIcfgContainer [2022-11-02 21:02:29,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:02:29,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:02:29,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:02:29,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:02:29,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:02:27" (1/3) ... [2022-11-02 21:02:29,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d631ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:02:29, skipping insertion in model container [2022-11-02 21:02:29,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:28" (2/3) ... [2022-11-02 21:02:29,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d631ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:02:29, skipping insertion in model container [2022-11-02 21:02:29,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:02:29" (3/3) ... [2022-11-02 21:02:29,181 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_b06.c [2022-11-02 21:02:29,208 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:02:29,208 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:02:29,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:02:29,293 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;@7b4bd08d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:02:29,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:02:29,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-02 21:02:29,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:29,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-02 21:02:29,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:29,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:29,311 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-02 21:02:29,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:29,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020061216] [2022-11-02 21:02:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:29,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:29,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:29,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:29,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 21:02:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:29,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 21:02:29,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:29,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:29,786 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:29,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020061216] [2022-11-02 21:02:29,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020061216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:29,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:29,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:02:29,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026227472] [2022-11-02 21:02:29,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:29,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:02:29,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:29,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:02:29,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:02:29,828 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 30 states have internal predecessors, (43), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:29,957 INFO L93 Difference]: Finished difference Result 80 states and 120 transitions. [2022-11-02 21:02:29,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:02:29,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2022-11-02 21:02:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:29,971 INFO L225 Difference]: With dead ends: 80 [2022-11-02 21:02:29,972 INFO L226 Difference]: Without dead ends: 51 [2022-11-02 21:02:29,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:29,979 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 63 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:29,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 99 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:02:30,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-02 21:02:30,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2022-11-02 21:02:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:30,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-11-02 21:02:30,021 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 5 [2022-11-02 21:02:30,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:30,022 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-11-02 21:02:30,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:30,022 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-11-02 21:02:30,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:02:30,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:30,024 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 21:02:30,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:30,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:30,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:30,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:30,237 INFO L85 PathProgramCache]: Analyzing trace with hash 202435871, now seen corresponding path program 1 times [2022-11-02 21:02:30,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:30,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707877090] [2022-11-02 21:02:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:30,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:30,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:30,240 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:30,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 21:02:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:30,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 21:02:30,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:30,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:30,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:30,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707877090] [2022-11-02 21:02:30,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707877090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:30,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:30,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:02:30,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67087167] [2022-11-02 21:02:30,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:30,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:02:30,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:30,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:02:30,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:02:30,432 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:30,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:30,527 INFO L93 Difference]: Finished difference Result 99 states and 138 transitions. [2022-11-02 21:02:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:02:30,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 28 [2022-11-02 21:02:30,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:30,530 INFO L225 Difference]: With dead ends: 99 [2022-11-02 21:02:30,531 INFO L226 Difference]: Without dead ends: 74 [2022-11-02 21:02:30,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:30,533 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 75 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:30,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 117 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:02:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-02 21:02:30,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 37. [2022-11-02 21:02:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2022-11-02 21:02:30,546 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 28 [2022-11-02 21:02:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:30,547 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2022-11-02 21:02:30,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2022-11-02 21:02:30,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:02:30,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:30,548 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 21:02:30,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:30,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:30,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:30,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:30,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1385912031, now seen corresponding path program 1 times [2022-11-02 21:02:30,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:30,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991904685] [2022-11-02 21:02:30,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:30,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:30,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:30,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:30,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 21:02:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:30,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 21:02:30,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:30,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:30,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:30,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991904685] [2022-11-02 21:02:30,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991904685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:30,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:30,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:02:30,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999936676] [2022-11-02 21:02:30,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:30,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:02:30,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:30,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:02:30,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:02:30,941 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:30,997 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2022-11-02 21:02:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:02:30,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 28 [2022-11-02 21:02:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:30,999 INFO L225 Difference]: With dead ends: 99 [2022-11-02 21:02:30,999 INFO L226 Difference]: Without dead ends: 74 [2022-11-02 21:02:31,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:31,001 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 64 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:31,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 116 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:02:31,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-02 21:02:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 41. [2022-11-02 21:02:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-11-02 21:02:31,011 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 28 [2022-11-02 21:02:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:31,012 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-11-02 21:02:31,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-11-02 21:02:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:02:31,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:31,014 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 21:02:31,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-02 21:02:31,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:31,229 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:31,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1972718045, now seen corresponding path program 1 times [2022-11-02 21:02:31,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:31,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046945701] [2022-11-02 21:02:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:31,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:31,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:31,237 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:31,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 21:02:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:31,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 21:02:31,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:31,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:31,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:31,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046945701] [2022-11-02 21:02:31,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046945701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:31,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:31,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:02:31,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277158616] [2022-11-02 21:02:31,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:31,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:02:31,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:31,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:02:31,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:02:31,374 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:31,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:31,417 INFO L93 Difference]: Finished difference Result 99 states and 136 transitions. [2022-11-02 21:02:31,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:02:31,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 28 [2022-11-02 21:02:31,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:31,419 INFO L225 Difference]: With dead ends: 99 [2022-11-02 21:02:31,419 INFO L226 Difference]: Without dead ends: 74 [2022-11-02 21:02:31,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:31,420 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 58 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:31,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 115 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:02:31,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-02 21:02:31,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 43. [2022-11-02 21:02:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:31,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2022-11-02 21:02:31,428 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 28 [2022-11-02 21:02:31,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:31,428 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2022-11-02 21:02:31,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2022-11-02 21:02:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:02:31,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:31,430 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 21:02:31,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:31,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:31,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:31,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:31,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1271653467, now seen corresponding path program 1 times [2022-11-02 21:02:31,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:31,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350864982] [2022-11-02 21:02:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:31,645 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:31,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:31,646 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:31,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 21:02:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:31,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 21:02:31,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:31,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:31,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:31,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350864982] [2022-11-02 21:02:31,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350864982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:31,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:31,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:02:31,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698358630] [2022-11-02 21:02:31,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:31,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:02:31,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:31,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:02:31,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:02:31,798 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:31,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:31,837 INFO L93 Difference]: Finished difference Result 99 states and 135 transitions. [2022-11-02 21:02:31,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:02:31,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 28 [2022-11-02 21:02:31,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:31,842 INFO L225 Difference]: With dead ends: 99 [2022-11-02 21:02:31,842 INFO L226 Difference]: Without dead ends: 74 [2022-11-02 21:02:31,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:31,845 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 42 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:31,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 114 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:02:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-02 21:02:31,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2022-11-02 21:02:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:31,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-11-02 21:02:31,860 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 28 [2022-11-02 21:02:31,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:31,861 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-11-02 21:02:31,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:31,861 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-11-02 21:02:31,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:02:31,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:31,862 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 21:02:31,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:32,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:32,063 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:32,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1269806425, now seen corresponding path program 1 times [2022-11-02 21:02:32,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:32,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621114268] [2022-11-02 21:02:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:32,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:32,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:32,065 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:32,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 21:02:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:32,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-02 21:02:32,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:33,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:35,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:35,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621114268] [2022-11-02 21:02:35,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621114268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:35,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:35,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-11-02 21:02:35,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742498201] [2022-11-02 21:02:35,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:35,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 21:02:35,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:35,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 21:02:35,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-11-02 21:02:35,923 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:40,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:40,527 INFO L93 Difference]: Finished difference Result 341 states and 472 transitions. [2022-11-02 21:02:40,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-02 21:02:40,528 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 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 28 [2022-11-02 21:02:40,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:40,530 INFO L225 Difference]: With dead ends: 341 [2022-11-02 21:02:40,531 INFO L226 Difference]: Without dead ends: 339 [2022-11-02 21:02:40,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1312, Invalid=5494, Unknown=0, NotChecked=0, Total=6806 [2022-11-02 21:02:40,534 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1030 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 742 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:40,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1030 Valid, 1333 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 356 Invalid, 0 Unknown, 742 Unchecked, 0.6s Time] [2022-11-02 21:02:40,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-02 21:02:40,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 88. [2022-11-02 21:02:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 87 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:40,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 118 transitions. [2022-11-02 21:02:40,546 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 118 transitions. Word has length 28 [2022-11-02 21:02:40,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:40,546 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 118 transitions. [2022-11-02 21:02:40,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:40,546 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 118 transitions. [2022-11-02 21:02:40,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:02:40,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:40,548 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 21:02:40,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-02 21:02:40,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:40,759 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:40,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:40,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1336217129, now seen corresponding path program 1 times [2022-11-02 21:02:40,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:40,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779603749] [2022-11-02 21:02:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:40,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:40,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:40,762 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:40,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 21:02:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:40,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:02:40,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:40,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:40,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:40,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779603749] [2022-11-02 21:02:40,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779603749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:40,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:40,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:02:40,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764440864] [2022-11-02 21:02:40,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:40,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:02:40,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:40,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:02:40,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:02:40,940 INFO L87 Difference]: Start difference. First operand 88 states and 118 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:40,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:40,981 INFO L93 Difference]: Finished difference Result 150 states and 203 transitions. [2022-11-02 21:02:40,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:02:40,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 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 28 [2022-11-02 21:02:40,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:40,986 INFO L225 Difference]: With dead ends: 150 [2022-11-02 21:02:40,987 INFO L226 Difference]: Without dead ends: 90 [2022-11-02 21:02:40,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:02:40,990 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:40,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 153 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-11-02 21:02:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-02 21:02:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-02 21:02:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.3370786516853932) internal successors, (119), 89 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2022-11-02 21:02:41,018 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 28 [2022-11-02 21:02:41,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:41,018 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2022-11-02 21:02:41,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:41,019 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2022-11-02 21:02:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:02:41,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:41,024 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 21:02:41,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:41,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:41,225 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:41,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1692508251, now seen corresponding path program 1 times [2022-11-02 21:02:41,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:41,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246327227] [2022-11-02 21:02:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:41,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:41,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:41,227 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:41,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 21:02:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:41,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 21:02:41,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:41,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:41,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:41,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246327227] [2022-11-02 21:02:41,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246327227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:41,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:41,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:02:41,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022382495] [2022-11-02 21:02:41,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:41,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:02:41,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:41,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:02:41,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:02:41,330 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:41,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:41,367 INFO L93 Difference]: Finished difference Result 179 states and 240 transitions. [2022-11-02 21:02:41,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:02:41,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 28 [2022-11-02 21:02:41,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:41,369 INFO L225 Difference]: With dead ends: 179 [2022-11-02 21:02:41,369 INFO L226 Difference]: Without dead ends: 115 [2022-11-02 21:02:41,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:41,370 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 77 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:41,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 98 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:02:41,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-02 21:02:41,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2022-11-02 21:02:41,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3218390804597702) internal successors, (115), 87 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 115 transitions. [2022-11-02 21:02:41,378 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 115 transitions. Word has length 28 [2022-11-02 21:02:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:41,378 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 115 transitions. [2022-11-02 21:02:41,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 115 transitions. [2022-11-02 21:02:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:02:41,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:41,380 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 21:02:41,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:41,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:41,592 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:41,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:41,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1219722537, now seen corresponding path program 1 times [2022-11-02 21:02:41,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:41,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866335765] [2022-11-02 21:02:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:41,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:41,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:41,594 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:41,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 21:02:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:41,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:02:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:41,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:41,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:41,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866335765] [2022-11-02 21:02:41,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866335765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:41,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:41,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:02:41,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751235306] [2022-11-02 21:02:41,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:41,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:02:41,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:41,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:02:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:02:41,753 INFO L87 Difference]: Start difference. First operand 88 states and 115 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:41,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:41,811 INFO L93 Difference]: Finished difference Result 170 states and 226 transitions. [2022-11-02 21:02:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:02:41,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 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 28 [2022-11-02 21:02:41,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:41,812 INFO L225 Difference]: With dead ends: 170 [2022-11-02 21:02:41,812 INFO L226 Difference]: Without dead ends: 110 [2022-11-02 21:02:41,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:02:41,813 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 70 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:41,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 304 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2022-11-02 21:02:41,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-02 21:02:41,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 88. [2022-11-02 21:02:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 87 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 114 transitions. [2022-11-02 21:02:41,821 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 114 transitions. Word has length 28 [2022-11-02 21:02:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:41,821 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 114 transitions. [2022-11-02 21:02:41,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:41,821 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 114 transitions. [2022-11-02 21:02:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:02:41,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:41,822 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 21:02:41,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:42,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:42,033 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:42,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:42,034 INFO L85 PathProgramCache]: Analyzing trace with hash -469221205, now seen corresponding path program 1 times [2022-11-02 21:02:42,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:42,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289864561] [2022-11-02 21:02:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:42,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:42,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:42,037 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:42,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 21:02:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:42,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-02 21:02:42,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:42,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:45,360 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:45,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289864561] [2022-11-02 21:02:45,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289864561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:45,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:45,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-11-02 21:02:45,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455636940] [2022-11-02 21:02:45,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:45,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 21:02:45,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:45,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 21:02:45,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-11-02 21:02:45,364 INFO L87 Difference]: Start difference. First operand 88 states and 114 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:49,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:49,205 INFO L93 Difference]: Finished difference Result 325 states and 445 transitions. [2022-11-02 21:02:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-02 21:02:49,206 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 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 28 [2022-11-02 21:02:49,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:49,207 INFO L225 Difference]: With dead ends: 325 [2022-11-02 21:02:49,208 INFO L226 Difference]: Without dead ends: 323 [2022-11-02 21:02:49,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1335, Invalid=5307, Unknown=0, NotChecked=0, Total=6642 [2022-11-02 21:02:49,211 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 415 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 2176 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 716 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:49,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 2176 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 616 Invalid, 0 Unknown, 716 Unchecked, 0.7s Time] [2022-11-02 21:02:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-11-02 21:02:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 76. [2022-11-02 21:02:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3333333333333333) internal successors, (100), 75 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2022-11-02 21:02:49,219 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 28 [2022-11-02 21:02:49,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:49,220 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2022-11-02 21:02:49,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:49,220 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2022-11-02 21:02:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:02:49,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:49,222 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-02 21:02:49,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:49,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:49,434 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:49,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:49,434 INFO L85 PathProgramCache]: Analyzing trace with hash 756484417, now seen corresponding path program 1 times [2022-11-02 21:02:49,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:49,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618157598] [2022-11-02 21:02:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:49,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:49,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:49,436 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:49,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-02 21:02:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:49,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:02:49,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:49,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:49,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:49,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618157598] [2022-11-02 21:02:49,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618157598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:49,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:49,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-02 21:02:49,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246835703] [2022-11-02 21:02:49,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:49,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:02:49,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:49,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:02:49,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:02:49,804 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:50,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:50,147 INFO L93 Difference]: Finished difference Result 204 states and 270 transitions. [2022-11-02 21:02:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:02:50,148 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 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 51 [2022-11-02 21:02:50,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:50,149 INFO L225 Difference]: With dead ends: 204 [2022-11-02 21:02:50,149 INFO L226 Difference]: Without dead ends: 156 [2022-11-02 21:02:50,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2022-11-02 21:02:50,150 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 207 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:50,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 420 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:02:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-02 21:02:50,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 86. [2022-11-02 21:02:50,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 85 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 112 transitions. [2022-11-02 21:02:50,162 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 112 transitions. Word has length 51 [2022-11-02 21:02:50,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:50,162 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 112 transitions. [2022-11-02 21:02:50,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.75) internal successors, (81), 12 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 112 transitions. [2022-11-02 21:02:50,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:02:50,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:50,164 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-02 21:02:50,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:50,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:50,376 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:50,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:50,376 INFO L85 PathProgramCache]: Analyzing trace with hash 333782591, now seen corresponding path program 1 times [2022-11-02 21:02:50,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:50,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434263375] [2022-11-02 21:02:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:50,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:50,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:50,378 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:50,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 21:02:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:50,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:02:50,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:50,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:50,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:50,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434263375] [2022-11-02 21:02:50,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434263375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:50,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:50,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-02 21:02:50,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383178343] [2022-11-02 21:02:50,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:50,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:02:50,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:50,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:02:50,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:02:50,782 INFO L87 Difference]: Start difference. First operand 86 states and 112 transitions. Second operand has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 12 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:51,199 INFO L93 Difference]: Finished difference Result 296 states and 399 transitions. [2022-11-02 21:02:51,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 21:02:51,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 12 states have internal predecessors, (95), 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 51 [2022-11-02 21:02:51,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:51,209 INFO L225 Difference]: With dead ends: 296 [2022-11-02 21:02:51,209 INFO L226 Difference]: Without dead ends: 238 [2022-11-02 21:02:51,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:02:51,212 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 246 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:51,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 513 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:02:51,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-02 21:02:51,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 100. [2022-11-02 21:02:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3333333333333333) internal successors, (132), 99 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 132 transitions. [2022-11-02 21:02:51,226 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 132 transitions. Word has length 51 [2022-11-02 21:02:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:51,226 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 132 transitions. [2022-11-02 21:02:51,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 12 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 132 transitions. [2022-11-02 21:02:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:02:51,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:51,228 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:51,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:51,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:02:51,442 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:51,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1441224771, now seen corresponding path program 1 times [2022-11-02 21:02:51,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:02:51,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92299099] [2022-11-02 21:02:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:51,443 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:02:51,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:02:51,444 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:02:51,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 21:02:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:51,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 21:02:51,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:02:52,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:02:55,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:02:55,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92299099] [2022-11-02 21:02:55,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92299099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:55,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:55,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-11-02 21:02:55,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108346668] [2022-11-02 21:02:55,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:55,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 21:02:55,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:02:55,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 21:02:55,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 21:02:55,775 INFO L87 Difference]: Start difference. First operand 100 states and 132 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:59,926 INFO L93 Difference]: Finished difference Result 713 states and 974 transitions. [2022-11-02 21:02:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-02 21:02:59,926 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 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 51 [2022-11-02 21:02:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:59,929 INFO L225 Difference]: With dead ends: 713 [2022-11-02 21:02:59,930 INFO L226 Difference]: Without dead ends: 711 [2022-11-02 21:02:59,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=449, Invalid=5403, Unknown=0, NotChecked=0, Total=5852 [2022-11-02 21:02:59,932 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 638 mSDsluCounter, 3330 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 3474 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1067 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:59,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 3474 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 362 Invalid, 0 Unknown, 1067 Unchecked, 0.4s Time] [2022-11-02 21:02:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-11-02 21:02:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 346. [2022-11-02 21:02:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.3855072463768117) internal successors, (478), 345 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 478 transitions. [2022-11-02 21:02:59,973 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 478 transitions. Word has length 51 [2022-11-02 21:02:59,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:59,973 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 478 transitions. [2022-11-02 21:02:59,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:59,974 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 478 transitions. [2022-11-02 21:02:59,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:02:59,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:59,975 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-02 21:02:59,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:00,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:00,180 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:00,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:00,181 INFO L85 PathProgramCache]: Analyzing trace with hash -740160193, now seen corresponding path program 1 times [2022-11-02 21:03:00,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:00,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981807971] [2022-11-02 21:03:00,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:00,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:00,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:00,182 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:00,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 21:03:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:00,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:03:00,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:03:00,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:03:00,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:00,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981807971] [2022-11-02 21:03:00,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981807971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:00,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:00,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-02 21:03:00,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561852746] [2022-11-02 21:03:00,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:00,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:03:00,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:00,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:03:00,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:03:00,556 INFO L87 Difference]: Start difference. First operand 346 states and 478 transitions. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:00,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:00,960 INFO L93 Difference]: Finished difference Result 1102 states and 1534 transitions. [2022-11-02 21:03:00,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:03:00,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 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 51 [2022-11-02 21:03:00,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:00,963 INFO L225 Difference]: With dead ends: 1102 [2022-11-02 21:03:00,963 INFO L226 Difference]: Without dead ends: 798 [2022-11-02 21:03:00,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2022-11-02 21:03:00,965 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 228 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:00,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 446 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:03:00,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-11-02 21:03:01,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 346. [2022-11-02 21:03:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.3710144927536232) internal successors, (473), 345 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 473 transitions. [2022-11-02 21:03:01,008 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 473 transitions. Word has length 51 [2022-11-02 21:03:01,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:01,008 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 473 transitions. [2022-11-02 21:03:01,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 473 transitions. [2022-11-02 21:03:01,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:03:01,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:01,009 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-02 21:03:01,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:01,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:01,216 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:01,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:01,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2028030785, now seen corresponding path program 1 times [2022-11-02 21:03:01,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:01,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597997150] [2022-11-02 21:03:01,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:01,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:01,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:01,219 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:01,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-02 21:03:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:01,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:03:01,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:03:01,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:03:01,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:01,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597997150] [2022-11-02 21:03:01,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597997150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:01,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:01,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-02 21:03:01,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170229378] [2022-11-02 21:03:01,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:01,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:03:01,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:01,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:03:01,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:03:01,589 INFO L87 Difference]: Start difference. First operand 346 states and 473 transitions. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:02,002 INFO L93 Difference]: Finished difference Result 1082 states and 1488 transitions. [2022-11-02 21:03:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:03:02,003 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 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 51 [2022-11-02 21:03:02,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:02,006 INFO L225 Difference]: With dead ends: 1082 [2022-11-02 21:03:02,006 INFO L226 Difference]: Without dead ends: 778 [2022-11-02 21:03:02,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2022-11-02 21:03:02,010 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 365 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:02,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 406 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:03:02,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-11-02 21:03:02,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 346. [2022-11-02 21:03:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.3565217391304347) internal successors, (468), 345 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 468 transitions. [2022-11-02 21:03:02,063 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 468 transitions. Word has length 51 [2022-11-02 21:03:02,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:02,064 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 468 transitions. [2022-11-02 21:03:02,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:02,065 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 468 transitions. [2022-11-02 21:03:02,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:03:02,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:02,066 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-02 21:03:02,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:02,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:02,279 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:02,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1573878847, now seen corresponding path program 1 times [2022-11-02 21:03:02,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:02,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760378186] [2022-11-02 21:03:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:02,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:02,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:02,282 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:02,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-02 21:03:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:03:02,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:03:02,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 21:03:02,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:02,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760378186] [2022-11-02 21:03:02,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760378186] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:02,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:03:02,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-02 21:03:02,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825017776] [2022-11-02 21:03:02,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:02,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:03:02,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:02,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:03:02,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:03:02,544 INFO L87 Difference]: Start difference. First operand 346 states and 468 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:02,691 INFO L93 Difference]: Finished difference Result 1168 states and 1574 transitions. [2022-11-02 21:03:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:03:02,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 51 [2022-11-02 21:03:02,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:02,695 INFO L225 Difference]: With dead ends: 1168 [2022-11-02 21:03:02,695 INFO L226 Difference]: Without dead ends: 856 [2022-11-02 21:03:02,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:02,697 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 61 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:02,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 178 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-11-02 21:03:02,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 424. [2022-11-02 21:03:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.3286052009456264) internal successors, (562), 423 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 562 transitions. [2022-11-02 21:03:02,741 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 562 transitions. Word has length 51 [2022-11-02 21:03:02,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:02,741 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 562 transitions. [2022-11-02 21:03:02,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 562 transitions. [2022-11-02 21:03:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:03:02,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:02,743 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-02 21:03:02,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:02,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:02,955 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:02,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2041030079, now seen corresponding path program 1 times [2022-11-02 21:03:02,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:02,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462705990] [2022-11-02 21:03:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:02,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:02,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:02,957 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:02,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-02 21:03:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:03,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 21:03:03,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:03:03,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:03:06,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:06,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462705990] [2022-11-02 21:03:06,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462705990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:06,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:06,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-11-02 21:03:06,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876498050] [2022-11-02 21:03:06,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:06,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 21:03:06,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:06,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 21:03:06,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 21:03:06,738 INFO L87 Difference]: Start difference. First operand 424 states and 562 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:12,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:12,509 INFO L93 Difference]: Finished difference Result 1647 states and 2153 transitions. [2022-11-02 21:03:12,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-02 21:03:12,510 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 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 51 [2022-11-02 21:03:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:12,518 INFO L225 Difference]: With dead ends: 1647 [2022-11-02 21:03:12,519 INFO L226 Difference]: Without dead ends: 1645 [2022-11-02 21:03:12,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2005, Invalid=9551, Unknown=0, NotChecked=0, Total=11556 [2022-11-02 21:03:12,522 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 595 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 2130 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1166 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:12,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 2130 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 604 Invalid, 0 Unknown, 1166 Unchecked, 0.7s Time] [2022-11-02 21:03:12,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-11-02 21:03:12,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 458. [2022-11-02 21:03:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.3260393873085339) internal successors, (606), 457 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 606 transitions. [2022-11-02 21:03:12,577 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 606 transitions. Word has length 51 [2022-11-02 21:03:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:12,577 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 606 transitions. [2022-11-02 21:03:12,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:12,578 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 606 transitions. [2022-11-02 21:03:12,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:03:12,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:12,579 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-02 21:03:12,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:12,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:12,791 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:12,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:12,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1265394623, now seen corresponding path program 1 times [2022-11-02 21:03:12,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:12,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37075889] [2022-11-02 21:03:12,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:12,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:12,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:12,793 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:12,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 21:03:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:12,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:03:12,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:03:13,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:03:13,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:13,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37075889] [2022-11-02 21:03:13,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37075889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:13,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:13,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-02 21:03:13,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522225112] [2022-11-02 21:03:13,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:13,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:03:13,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:03:13,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:03:13,140 INFO L87 Difference]: Start difference. First operand 458 states and 606 transitions. Second operand has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:13,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:13,548 INFO L93 Difference]: Finished difference Result 1202 states and 1600 transitions. [2022-11-02 21:03:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:03:13,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 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 51 [2022-11-02 21:03:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:13,551 INFO L225 Difference]: With dead ends: 1202 [2022-11-02 21:03:13,551 INFO L226 Difference]: Without dead ends: 798 [2022-11-02 21:03:13,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2022-11-02 21:03:13,553 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 247 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:13,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 336 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:03:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-11-02 21:03:13,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 458. [2022-11-02 21:03:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.312910284463895) internal successors, (600), 457 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 600 transitions. [2022-11-02 21:03:13,607 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 600 transitions. Word has length 51 [2022-11-02 21:03:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:13,608 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 600 transitions. [2022-11-02 21:03:13,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 12 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 600 transitions. [2022-11-02 21:03:13,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:03:13,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:13,609 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-02 21:03:13,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:13,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:13,821 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:13,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:13,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1164798783, now seen corresponding path program 1 times [2022-11-02 21:03:13,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:13,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362662966] [2022-11-02 21:03:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:13,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:13,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:13,823 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:13,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 21:03:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:13,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:03:13,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:03:14,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:03:14,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:14,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362662966] [2022-11-02 21:03:14,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362662966] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:14,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:03:14,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-02 21:03:14,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077266982] [2022-11-02 21:03:14,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:14,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:03:14,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:14,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:03:14,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:14,078 INFO L87 Difference]: Start difference. First operand 458 states and 600 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:14,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:14,232 INFO L93 Difference]: Finished difference Result 1128 states and 1492 transitions. [2022-11-02 21:03:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:03:14,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 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 51 [2022-11-02 21:03:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:14,236 INFO L225 Difference]: With dead ends: 1128 [2022-11-02 21:03:14,236 INFO L226 Difference]: Without dead ends: 724 [2022-11-02 21:03:14,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:03:14,238 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 122 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:14,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 127 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-11-02 21:03:14,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 438. [2022-11-02 21:03:14,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.299771167048055) internal successors, (568), 437 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 568 transitions. [2022-11-02 21:03:14,292 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 568 transitions. Word has length 51 [2022-11-02 21:03:14,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:14,292 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 568 transitions. [2022-11-02 21:03:14,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:14,292 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 568 transitions. [2022-11-02 21:03:14,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:03:14,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:14,293 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-02 21:03:14,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:14,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:14,507 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:14,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1048304191, now seen corresponding path program 1 times [2022-11-02 21:03:14,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:14,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993123478] [2022-11-02 21:03:14,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:14,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:14,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:14,508 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:14,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 21:03:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:14,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:03:14,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:03:14,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:03:14,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:14,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993123478] [2022-11-02 21:03:14,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993123478] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:14,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:03:14,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-02 21:03:14,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875876398] [2022-11-02 21:03:14,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:14,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:03:14,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:14,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:03:14,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:03:14,713 INFO L87 Difference]: Start difference. First operand 438 states and 568 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:14,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:14,826 INFO L93 Difference]: Finished difference Result 1000 states and 1312 transitions. [2022-11-02 21:03:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:03:14,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 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 51 [2022-11-02 21:03:14,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:14,828 INFO L225 Difference]: With dead ends: 1000 [2022-11-02 21:03:14,829 INFO L226 Difference]: Without dead ends: 616 [2022-11-02 21:03:14,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:14,830 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 87 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:14,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-02 21:03:14,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 436. [2022-11-02 21:03:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.282758620689655) internal successors, (558), 435 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 558 transitions. [2022-11-02 21:03:14,876 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 558 transitions. Word has length 51 [2022-11-02 21:03:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:14,877 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 558 transitions. [2022-11-02 21:03:14,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 558 transitions. [2022-11-02 21:03:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:03:14,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:14,878 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-02 21:03:14,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:15,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:15,091 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash -640639551, now seen corresponding path program 1 times [2022-11-02 21:03:15,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:15,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206061110] [2022-11-02 21:03:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:15,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:15,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:15,093 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:15,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 21:03:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:15,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 21:03:15,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:03:16,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:03:19,056 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:19,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206061110] [2022-11-02 21:03:19,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206061110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:19,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:19,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-11-02 21:03:19,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001239946] [2022-11-02 21:03:19,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:19,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 21:03:19,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:19,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 21:03:19,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 21:03:19,058 INFO L87 Difference]: Start difference. First operand 436 states and 558 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:25,914 INFO L93 Difference]: Finished difference Result 1968 states and 2563 transitions. [2022-11-02 21:03:25,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-02 21:03:25,915 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 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 51 [2022-11-02 21:03:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:25,918 INFO L225 Difference]: With dead ends: 1968 [2022-11-02 21:03:25,918 INFO L226 Difference]: Without dead ends: 1966 [2022-11-02 21:03:25,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3286 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=2812, Invalid=11230, Unknown=0, NotChecked=0, Total=14042 [2022-11-02 21:03:25,921 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 833 mSDsluCounter, 2761 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 2877 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1490 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:25,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 2877 Invalid, 2343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 767 Invalid, 0 Unknown, 1490 Unchecked, 0.9s Time] [2022-11-02 21:03:25,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-11-02 21:03:26,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 900. [2022-11-02 21:03:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 1.3025583982202447) internal successors, (1171), 899 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:26,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1171 transitions. [2022-11-02 21:03:26,047 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1171 transitions. Word has length 51 [2022-11-02 21:03:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:26,048 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 1171 transitions. [2022-11-02 21:03:26,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:26,048 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1171 transitions. [2022-11-02 21:03:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:03:26,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:26,049 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-02 21:03:26,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:26,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:26,261 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:26,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:26,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1240444859, now seen corresponding path program 1 times [2022-11-02 21:03:26,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:26,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893746887] [2022-11-02 21:03:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:26,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:26,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:26,263 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:26,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-02 21:03:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:26,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 21:03:26,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:03:27,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:03:30,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:30,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893746887] [2022-11-02 21:03:30,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893746887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:30,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:30,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-11-02 21:03:30,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815689223] [2022-11-02 21:03:30,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:30,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 21:03:30,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:30,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 21:03:30,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 21:03:30,222 INFO L87 Difference]: Start difference. First operand 900 states and 1171 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:36,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:36,064 INFO L93 Difference]: Finished difference Result 2525 states and 3304 transitions. [2022-11-02 21:03:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-02 21:03:36,067 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 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 51 [2022-11-02 21:03:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:36,071 INFO L225 Difference]: With dead ends: 2525 [2022-11-02 21:03:36,071 INFO L226 Difference]: Without dead ends: 2523 [2022-11-02 21:03:36,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1912, Invalid=8594, Unknown=0, NotChecked=0, Total=10506 [2022-11-02 21:03:36,074 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 351 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 3276 SdHoareTripleChecker+Invalid, 2534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1436 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:36,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 3276 Invalid, 2534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1074 Invalid, 0 Unknown, 1436 Unchecked, 1.1s Time] [2022-11-02 21:03:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2022-11-02 21:03:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 904. [2022-11-02 21:03:36,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 1.3067552602436323) internal successors, (1180), 903 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1180 transitions. [2022-11-02 21:03:36,183 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1180 transitions. Word has length 51 [2022-11-02 21:03:36,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:36,183 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1180 transitions. [2022-11-02 21:03:36,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:36,184 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1180 transitions. [2022-11-02 21:03:36,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:03:36,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:36,186 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:36,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:36,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:36,398 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:36,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:36,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1868059499, now seen corresponding path program 2 times [2022-11-02 21:03:36,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:36,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879956966] [2022-11-02 21:03:36,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:03:36,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:36,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:36,399 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:36,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 21:03:36,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:03:36,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:03:36,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 21:03:36,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:03:36,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:03:36,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:36,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879956966] [2022-11-02 21:03:36,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879956966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:36,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:36,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-11-02 21:03:36,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217326228] [2022-11-02 21:03:36,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:36,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 21:03:36,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:36,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 21:03:36,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:03:36,980 INFO L87 Difference]: Start difference. First operand 904 states and 1180 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:38,287 INFO L93 Difference]: Finished difference Result 4872 states and 6294 transitions. [2022-11-02 21:03:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-02 21:03:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:03:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:38,294 INFO L225 Difference]: With dead ends: 4872 [2022-11-02 21:03:38,294 INFO L226 Difference]: Without dead ends: 4022 [2022-11-02 21:03:38,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=1663, Unknown=0, NotChecked=0, Total=2162 [2022-11-02 21:03:38,296 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 670 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:38,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 646 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:03:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2022-11-02 21:03:38,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 1184. [2022-11-02 21:03:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.2983939137785292) internal successors, (1536), 1183 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1536 transitions. [2022-11-02 21:03:38,485 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1536 transitions. Word has length 74 [2022-11-02 21:03:38,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:38,485 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1536 transitions. [2022-11-02 21:03:38,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1536 transitions. [2022-11-02 21:03:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:03:38,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:38,488 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:38,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:38,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:38,705 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:38,705 INFO L85 PathProgramCache]: Analyzing trace with hash 279711597, now seen corresponding path program 3 times [2022-11-02 21:03:38,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:38,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242757258] [2022-11-02 21:03:38,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:03:38,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:38,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:38,706 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:38,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 21:03:38,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 21:03:38,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:03:38,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:03:38,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-02 21:03:38,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:38,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:38,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242757258] [2022-11-02 21:03:38,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242757258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:38,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:38,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:03:38,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641502971] [2022-11-02 21:03:38,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:38,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:03:38,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:38,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:03:38,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:03:38,831 INFO L87 Difference]: Start difference. First operand 1184 states and 1536 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:39,068 INFO L93 Difference]: Finished difference Result 2398 states and 3114 transitions. [2022-11-02 21:03:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:03:39,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:03:39,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:39,073 INFO L225 Difference]: With dead ends: 2398 [2022-11-02 21:03:39,073 INFO L226 Difference]: Without dead ends: 1264 [2022-11-02 21:03:39,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:03:39,076 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 63 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:39,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 139 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-11-02 21:03:39,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1220. [2022-11-02 21:03:39,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 1.287940935192781) internal successors, (1570), 1219 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:39,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1570 transitions. [2022-11-02 21:03:39,268 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1570 transitions. Word has length 74 [2022-11-02 21:03:39,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:39,269 INFO L495 AbstractCegarLoop]: Abstraction has 1220 states and 1570 transitions. [2022-11-02 21:03:39,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:39,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1570 transitions. [2022-11-02 21:03:39,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:03:39,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:39,271 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:39,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:39,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:39,483 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:39,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:39,483 INFO L85 PathProgramCache]: Analyzing trace with hash 281558639, now seen corresponding path program 4 times [2022-11-02 21:03:39,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:39,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5563820] [2022-11-02 21:03:39,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:03:39,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:39,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:39,485 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:39,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-02 21:03:39,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:03:39,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:03:39,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 21:03:39,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:03:39,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:03:40,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:40,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5563820] [2022-11-02 21:03:40,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5563820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:40,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:40,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-11-02 21:03:40,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513036302] [2022-11-02 21:03:40,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:40,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 21:03:40,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:40,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 21:03:40,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:03:40,070 INFO L87 Difference]: Start difference. First operand 1220 states and 1570 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:41,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:41,413 INFO L93 Difference]: Finished difference Result 4877 states and 6141 transitions. [2022-11-02 21:03:41,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 21:03:41,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:03:41,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:41,423 INFO L225 Difference]: With dead ends: 4877 [2022-11-02 21:03:41,423 INFO L226 Difference]: Without dead ends: 3707 [2022-11-02 21:03:41,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=457, Invalid=1523, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 21:03:41,425 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 477 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:41,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 480 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:03:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2022-11-02 21:03:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 1310. [2022-11-02 21:03:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 1.2796027501909855) internal successors, (1675), 1309 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1675 transitions. [2022-11-02 21:03:41,583 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1675 transitions. Word has length 74 [2022-11-02 21:03:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:41,583 INFO L495 AbstractCegarLoop]: Abstraction has 1310 states and 1675 transitions. [2022-11-02 21:03:41,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1675 transitions. [2022-11-02 21:03:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:03:41,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:41,586 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:41,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-02 21:03:41,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:41,798 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:41,798 INFO L85 PathProgramCache]: Analyzing trace with hash -305247375, now seen corresponding path program 5 times [2022-11-02 21:03:41,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:41,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906892271] [2022-11-02 21:03:41,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:03:41,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:41,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:41,799 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:41,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-02 21:03:41,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 21:03:41,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:03:41,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:03:41,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-02 21:03:41,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:41,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:41,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906892271] [2022-11-02 21:03:41,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906892271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:41,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:41,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:03:41,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052243699] [2022-11-02 21:03:41,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:41,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:03:41,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:41,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:03:41,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:03:41,926 INFO L87 Difference]: Start difference. First operand 1310 states and 1675 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:42,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:42,160 INFO L93 Difference]: Finished difference Result 3029 states and 3858 transitions. [2022-11-02 21:03:42,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:03:42,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:03:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:42,165 INFO L225 Difference]: With dead ends: 3029 [2022-11-02 21:03:42,165 INFO L226 Difference]: Without dead ends: 1769 [2022-11-02 21:03:42,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:03:42,167 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 59 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:42,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 178 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2022-11-02 21:03:42,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1352. [2022-11-02 21:03:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 1.2716506291635825) internal successors, (1718), 1351 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1718 transitions. [2022-11-02 21:03:42,311 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1718 transitions. Word has length 74 [2022-11-02 21:03:42,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:42,312 INFO L495 AbstractCegarLoop]: Abstraction has 1352 states and 1718 transitions. [2022-11-02 21:03:42,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:42,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1718 transitions. [2022-11-02 21:03:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:03:42,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:42,318 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:42,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:42,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:42,541 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:42,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:42,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2082101779, now seen corresponding path program 6 times [2022-11-02 21:03:42,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:42,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100172764] [2022-11-02 21:03:42,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:03:42,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:42,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:42,543 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:42,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-02 21:03:42,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 21:03:42,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:03:42,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:03:42,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 21:03:42,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:42,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:42,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100172764] [2022-11-02 21:03:42,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100172764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:42,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:42,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:03:42,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124027282] [2022-11-02 21:03:42,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:42,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:03:42,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:42,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:03:42,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:03:42,675 INFO L87 Difference]: Start difference. First operand 1352 states and 1718 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:42,867 INFO L93 Difference]: Finished difference Result 2834 states and 3587 transitions. [2022-11-02 21:03:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:03:42,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:03:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:42,872 INFO L225 Difference]: With dead ends: 2834 [2022-11-02 21:03:42,872 INFO L226 Difference]: Without dead ends: 1468 [2022-11-02 21:03:42,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:03:42,874 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 110 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:42,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 121 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2022-11-02 21:03:42,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1213. [2022-11-02 21:03:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 1.2417491749174918) internal successors, (1505), 1212 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1505 transitions. [2022-11-02 21:03:42,986 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1505 transitions. Word has length 74 [2022-11-02 21:03:42,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:42,986 INFO L495 AbstractCegarLoop]: Abstraction has 1213 states and 1505 transitions. [2022-11-02 21:03:42,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1505 transitions. [2022-11-02 21:03:42,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:03:42,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:42,989 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:43,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:43,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:43,201 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:43,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1790163691, now seen corresponding path program 7 times [2022-11-02 21:03:43,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:43,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552300977] [2022-11-02 21:03:43,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:03:43,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:43,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:43,204 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:43,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-02 21:03:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 21:03:43,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:03:43,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:03:43,771 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:43,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552300977] [2022-11-02 21:03:43,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552300977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:43,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:43,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-11-02 21:03:43,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062770993] [2022-11-02 21:03:43,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:43,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 21:03:43,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:43,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 21:03:43,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:03:43,773 INFO L87 Difference]: Start difference. First operand 1213 states and 1505 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:44,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:44,733 INFO L93 Difference]: Finished difference Result 3163 states and 3830 transitions. [2022-11-02 21:03:44,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 21:03:44,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:03:44,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:44,740 INFO L225 Difference]: With dead ends: 3163 [2022-11-02 21:03:44,740 INFO L226 Difference]: Without dead ends: 1960 [2022-11-02 21:03:44,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=340, Invalid=1220, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 21:03:44,742 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 388 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:44,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 503 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:03:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2022-11-02 21:03:44,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1129. [2022-11-02 21:03:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1128 states have (on average 1.2384751773049645) internal successors, (1397), 1128 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1397 transitions. [2022-11-02 21:03:44,843 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1397 transitions. Word has length 74 [2022-11-02 21:03:44,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:44,844 INFO L495 AbstractCegarLoop]: Abstraction has 1129 states and 1397 transitions. [2022-11-02 21:03:44,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1397 transitions. [2022-11-02 21:03:44,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:03:44,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:44,846 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:44,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:45,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:45,058 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:45,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:45,059 INFO L85 PathProgramCache]: Analyzing trace with hash -839122779, now seen corresponding path program 8 times [2022-11-02 21:03:45,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:45,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233579703] [2022-11-02 21:03:45,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:03:45,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:45,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:45,060 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:45,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-02 21:03:45,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:03:45,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:03:45,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:03:45,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:03:45,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:03:45,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:45,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233579703] [2022-11-02 21:03:45,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233579703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:45,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:45,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-02 21:03:45,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434666384] [2022-11-02 21:03:45,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:45,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:03:45,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:45,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:03:45,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:03:45,430 INFO L87 Difference]: Start difference. First operand 1129 states and 1397 transitions. Second operand has 12 states, 12 states have (on average 9.833333333333334) internal successors, (118), 12 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:45,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:45,754 INFO L93 Difference]: Finished difference Result 2590 states and 3204 transitions. [2022-11-02 21:03:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:03:45,754 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.833333333333334) internal successors, (118), 12 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:03:45,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:45,759 INFO L225 Difference]: With dead ends: 2590 [2022-11-02 21:03:45,759 INFO L226 Difference]: Without dead ends: 1918 [2022-11-02 21:03:45,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:03:45,761 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 337 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:45,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 290 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:03:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2022-11-02 21:03:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1180. [2022-11-02 21:03:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 1.2290076335877862) internal successors, (1449), 1179 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:45,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1449 transitions. [2022-11-02 21:03:45,860 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1449 transitions. Word has length 74 [2022-11-02 21:03:45,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:45,860 INFO L495 AbstractCegarLoop]: Abstraction has 1180 states and 1449 transitions. [2022-11-02 21:03:45,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.833333333333334) internal successors, (118), 12 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:45,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1449 transitions. [2022-11-02 21:03:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:03:45,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:45,862 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:45,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:46,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:46,075 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:46,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:46,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1449236563, now seen corresponding path program 1 times [2022-11-02 21:03:46,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:46,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106785898] [2022-11-02 21:03:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:03:46,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:46,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:46,076 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:46,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-02 21:03:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:03:46,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:03:46,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:03:46,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:03:46,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:46,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106785898] [2022-11-02 21:03:46,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106785898] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:03:46,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:03:46,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-02 21:03:46,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47499482] [2022-11-02 21:03:46,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:46,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:03:46,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:46,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:03:46,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:03:46,337 INFO L87 Difference]: Start difference. First operand 1180 states and 1449 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:46,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:46,507 INFO L93 Difference]: Finished difference Result 2687 states and 3252 transitions. [2022-11-02 21:03:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:03:46,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:03:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:46,510 INFO L225 Difference]: With dead ends: 2687 [2022-11-02 21:03:46,511 INFO L226 Difference]: Without dead ends: 1509 [2022-11-02 21:03:46,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:03:46,513 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 86 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:46,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 127 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:46,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2022-11-02 21:03:46,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1168. [2022-11-02 21:03:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 1.196229648671808) internal successors, (1396), 1167 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1396 transitions. [2022-11-02 21:03:46,600 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1396 transitions. Word has length 74 [2022-11-02 21:03:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:46,600 INFO L495 AbstractCegarLoop]: Abstraction has 1168 states and 1396 transitions. [2022-11-02 21:03:46,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:46,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1396 transitions. [2022-11-02 21:03:46,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:03:46,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:46,602 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:46,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-02 21:03:46,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:46,814 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:46,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:46,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1816371435, now seen corresponding path program 2 times [2022-11-02 21:03:46,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:46,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787987473] [2022-11-02 21:03:46,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:03:46,815 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:46,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:46,816 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:46,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-02 21:03:46,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:03:46,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:03:46,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 21:03:46,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:03:47,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:03:47,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:47,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787987473] [2022-11-02 21:03:47,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787987473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:47,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:47,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-11-02 21:03:47,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900466924] [2022-11-02 21:03:47,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:47,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 21:03:47,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:47,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 21:03:47,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:03:47,465 INFO L87 Difference]: Start difference. First operand 1168 states and 1396 transitions. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:48,639 INFO L93 Difference]: Finished difference Result 2704 states and 3168 transitions. [2022-11-02 21:03:48,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 21:03:48,643 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:03:48,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:48,646 INFO L225 Difference]: With dead ends: 2704 [2022-11-02 21:03:48,646 INFO L226 Difference]: Without dead ends: 1538 [2022-11-02 21:03:48,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=481, Invalid=1499, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 21:03:48,648 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 358 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:48,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 940 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:03:48,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2022-11-02 21:03:48,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 928. [2022-11-02 21:03:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.1693635382955772) internal successors, (1084), 927 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1084 transitions. [2022-11-02 21:03:48,741 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1084 transitions. Word has length 74 [2022-11-02 21:03:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:48,742 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1084 transitions. [2022-11-02 21:03:48,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1084 transitions. [2022-11-02 21:03:48,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:03:48,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:48,743 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:48,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:48,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:48,956 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:48,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:48,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1393669609, now seen corresponding path program 3 times [2022-11-02 21:03:48,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:48,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167823759] [2022-11-02 21:03:48,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:03:48,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:48,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:48,958 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:48,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-02 21:03:49,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 21:03:49,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:03:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:03:49,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 21:03:49,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:49,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:49,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167823759] [2022-11-02 21:03:49,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167823759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:49,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:49,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:03:49,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614353573] [2022-11-02 21:03:49,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:49,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:03:49,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:49,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:03:49,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:03:49,079 INFO L87 Difference]: Start difference. First operand 928 states and 1084 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:49,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:49,261 INFO L93 Difference]: Finished difference Result 1622 states and 1888 transitions. [2022-11-02 21:03:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:03:49,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:03:49,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:49,264 INFO L225 Difference]: With dead ends: 1622 [2022-11-02 21:03:49,264 INFO L226 Difference]: Without dead ends: 1069 [2022-11-02 21:03:49,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:03:49,265 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 70 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:49,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 158 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:49,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-11-02 21:03:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 858. [2022-11-02 21:03:49,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 1.1668611435239207) internal successors, (1000), 857 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1000 transitions. [2022-11-02 21:03:49,348 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1000 transitions. Word has length 74 [2022-11-02 21:03:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:49,349 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 1000 transitions. [2022-11-02 21:03:49,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1000 transitions. [2022-11-02 21:03:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:03:49,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:49,350 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:49,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:49,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:49,551 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:49,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:49,551 INFO L85 PathProgramCache]: Analyzing trace with hash -383184795, now seen corresponding path program 4 times [2022-11-02 21:03:49,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:49,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213763980] [2022-11-02 21:03:49,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:03:49,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:49,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:49,553 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:49,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-02 21:03:49,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:03:49,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:03:49,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 21:03:49,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:03:49,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:03:50,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:50,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213763980] [2022-11-02 21:03:50,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213763980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:50,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:50,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-11-02 21:03:50,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942008443] [2022-11-02 21:03:50,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:50,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 21:03:50,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:50,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 21:03:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:03:50,272 INFO L87 Difference]: Start difference. First operand 858 states and 1000 transitions. Second operand has 20 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:51,376 INFO L93 Difference]: Finished difference Result 2479 states and 2858 transitions. [2022-11-02 21:03:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 21:03:51,377 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:03:51,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:51,379 INFO L225 Difference]: With dead ends: 2479 [2022-11-02 21:03:51,379 INFO L226 Difference]: Without dead ends: 1623 [2022-11-02 21:03:51,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 21:03:51,381 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 213 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:51,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1050 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:03:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-11-02 21:03:51,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 858. [2022-11-02 21:03:51,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 1.1400233372228705) internal successors, (977), 857 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 977 transitions. [2022-11-02 21:03:51,481 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 977 transitions. Word has length 74 [2022-11-02 21:03:51,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:51,481 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 977 transitions. [2022-11-02 21:03:51,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:51,482 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 977 transitions. [2022-11-02 21:03:51,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:03:51,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:51,482 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:51,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:51,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:51,683 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:51,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1671055387, now seen corresponding path program 5 times [2022-11-02 21:03:51,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:51,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304130194] [2022-11-02 21:03:51,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:03:51,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:51,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:51,685 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:51,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-02 21:03:51,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 21:03:51,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:03:51,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 21:03:51,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 59 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:03:52,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:03:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 59 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:03:53,583 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:53,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304130194] [2022-11-02 21:03:53,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304130194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:03:53,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:03:53,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2022-11-02 21:03:53,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229669028] [2022-11-02 21:03:53,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:03:53,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 21:03:53,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:53,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 21:03:53,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2022-11-02 21:03:53,585 INFO L87 Difference]: Start difference. First operand 858 states and 977 transitions. Second operand has 31 states, 31 states have (on average 3.6774193548387095) internal successors, (114), 31 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:54,809 INFO L93 Difference]: Finished difference Result 2113 states and 2426 transitions. [2022-11-02 21:03:54,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 21:03:54,809 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.6774193548387095) internal successors, (114), 31 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:03:54,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:54,811 INFO L225 Difference]: With dead ends: 2113 [2022-11-02 21:03:54,811 INFO L226 Difference]: Without dead ends: 1257 [2022-11-02 21:03:54,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=191, Invalid=1971, Unknown=0, NotChecked=0, Total=2162 [2022-11-02 21:03:54,813 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 167 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:54,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1370 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 306 Unchecked, 0.1s Time] [2022-11-02 21:03:54,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-11-02 21:03:54,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 913. [2022-11-02 21:03:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 1.1414473684210527) internal successors, (1041), 912 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1041 transitions. [2022-11-02 21:03:54,917 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1041 transitions. Word has length 74 [2022-11-02 21:03:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:54,917 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1041 transitions. [2022-11-02 21:03:54,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.6774193548387095) internal successors, (114), 31 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1041 transitions. [2022-11-02 21:03:54,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:03:54,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:54,918 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:54,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:55,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:55,119 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:55,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:55,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1622370021, now seen corresponding path program 6 times [2022-11-02 21:03:55,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:55,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890133471] [2022-11-02 21:03:55,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:03:55,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:55,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:55,121 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:55,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-02 21:03:55,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 21:03:55,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:03:55,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:03:55,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-02 21:03:55,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:03:55,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:03:55,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890133471] [2022-11-02 21:03:55,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890133471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:03:55,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:03:55,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:03:55,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233735600] [2022-11-02 21:03:55,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:03:55,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:03:55,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:03:55,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:03:55,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:03:55,257 INFO L87 Difference]: Start difference. First operand 913 states and 1041 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:03:55,394 INFO L93 Difference]: Finished difference Result 1806 states and 2042 transitions. [2022-11-02 21:03:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:03:55,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:03:55,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:03:55,396 INFO L225 Difference]: With dead ends: 1806 [2022-11-02 21:03:55,396 INFO L226 Difference]: Without dead ends: 781 [2022-11-02 21:03:55,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:03:55,397 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 89 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:03:55,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 120 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:03:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-11-02 21:03:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 680. [2022-11-02 21:03:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 1.1119293078055965) internal successors, (755), 679 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 755 transitions. [2022-11-02 21:03:55,484 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 755 transitions. Word has length 74 [2022-11-02 21:03:55,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:03:55,485 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 755 transitions. [2022-11-02 21:03:55,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:03:55,485 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 755 transitions. [2022-11-02 21:03:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:03:55,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:03:55,486 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:03:55,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-02 21:03:55,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:03:55,687 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:03:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:03:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash -283664153, now seen corresponding path program 2 times [2022-11-02 21:03:55,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:03:55,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721567621] [2022-11-02 21:03:55,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:03:55,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:03:55,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:03:55,689 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:03:55,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-02 21:03:55,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:03:55,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:03:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 21:03:55,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 21:03:56,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 21:04:00,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:00,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721567621] [2022-11-02 21:04:00,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721567621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:00,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:00,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-11-02 21:04:00,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268101437] [2022-11-02 21:04:00,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:00,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 21:04:00,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:00,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 21:04:00,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 21:04:00,113 INFO L87 Difference]: Start difference. First operand 680 states and 755 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:03,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:03,250 INFO L93 Difference]: Finished difference Result 1180 states and 1293 transitions. [2022-11-02 21:04:03,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-02 21:04:03,251 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:04:03,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:03,252 INFO L225 Difference]: With dead ends: 1180 [2022-11-02 21:04:03,253 INFO L226 Difference]: Without dead ends: 1178 [2022-11-02 21:04:03,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=853, Invalid=4847, Unknown=0, NotChecked=0, Total=5700 [2022-11-02 21:04:03,254 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 201 mSDsluCounter, 1939 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 622 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:03,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 2049 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 467 Invalid, 0 Unknown, 622 Unchecked, 0.5s Time] [2022-11-02 21:04:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-11-02 21:04:03,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 436. [2022-11-02 21:04:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.1080459770114943) internal successors, (482), 435 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 482 transitions. [2022-11-02 21:04:03,307 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 482 transitions. Word has length 74 [2022-11-02 21:04:03,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:03,308 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 482 transitions. [2022-11-02 21:04:03,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:03,308 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 482 transitions. [2022-11-02 21:04:03,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-02 21:04:03,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:03,308 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:03,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:03,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:03,509 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:03,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:03,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1086636189, now seen corresponding path program 3 times [2022-11-02 21:04:03,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:03,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818550626] [2022-11-02 21:04:03,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:04:03,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:03,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:03,511 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:03,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-02 21:04:03,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 21:04:03,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:04:03,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 21:04:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 21:04:04,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 21:04:07,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:07,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818550626] [2022-11-02 21:04:07,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818550626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:07,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:07,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-11-02 21:04:07,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501390083] [2022-11-02 21:04:07,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:07,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 21:04:07,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:07,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 21:04:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 21:04:07,843 INFO L87 Difference]: Start difference. First operand 436 states and 482 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:12,575 INFO L93 Difference]: Finished difference Result 948 states and 1031 transitions. [2022-11-02 21:04:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-02 21:04:12,576 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-02 21:04:12,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:12,577 INFO L225 Difference]: With dead ends: 948 [2022-11-02 21:04:12,577 INFO L226 Difference]: Without dead ends: 946 [2022-11-02 21:04:12,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1514, Invalid=7416, Unknown=0, NotChecked=0, Total=8930 [2022-11-02 21:04:12,578 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 515 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 876 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:12,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1232 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 681 Invalid, 0 Unknown, 876 Unchecked, 0.6s Time] [2022-11-02 21:04:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-11-02 21:04:12,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 157. [2022-11-02 21:04:12,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.108974358974359) internal successors, (173), 156 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 173 transitions. [2022-11-02 21:04:12,622 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 173 transitions. Word has length 74 [2022-11-02 21:04:12,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:12,622 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 173 transitions. [2022-11-02 21:04:12,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:12,622 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 173 transitions. [2022-11-02 21:04:12,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 21:04:12,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:12,623 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:12,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:12,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:12,823 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:12,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash -198800897, now seen corresponding path program 7 times [2022-11-02 21:04:12,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 21:04:12,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131996751] [2022-11-02 21:04:12,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:04:12,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 21:04:12,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 21:04:12,825 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 21:04:12,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-02 21:04:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:13,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 21:04:13,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 35 proven. 54 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-02 21:04:13,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 35 proven. 54 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-02 21:04:13,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 21:04:13,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131996751] [2022-11-02 21:04:13,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131996751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:13,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:04:13,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-11-02 21:04:13,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60327741] [2022-11-02 21:04:13,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:13,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 21:04:13,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 21:04:13,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 21:04:13,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:04:13,645 INFO L87 Difference]: Start difference. First operand 157 states and 173 transitions. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:14,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:14,735 INFO L93 Difference]: Finished difference Result 419 states and 457 transitions. [2022-11-02 21:04:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 21:04:14,735 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 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 97 [2022-11-02 21:04:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:14,736 INFO L225 Difference]: With dead ends: 419 [2022-11-02 21:04:14,736 INFO L226 Difference]: Without dead ends: 0 [2022-11-02 21:04:14,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 21:04:14,737 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 259 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:14,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 1079 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:04:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-02 21:04:14,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-02 21:04:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-02 21:04:14,738 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 97 [2022-11-02 21:04:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:14,739 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-02 21:04:14,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:04:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-02 21:04:14,739 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-02 21:04:14,742 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-02 21:04:14,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-02 21:04:14,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae611f57-f4c2-4247-bb96-1f85832048c4/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 21:04:14,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.