./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2dc34619b8722f38daca39084af716acca2f2990c40299072c7b560e6e3245de --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:34:25,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:34:25,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:34:25,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:34:25,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:34:25,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:34:25,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:34:25,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:34:25,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:34:25,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:34:25,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:34:25,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:34:25,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:34:25,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:34:25,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:34:25,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:34:25,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:34:25,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:34:25,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:34:25,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:34:25,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:34:25,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:34:25,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:34:25,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:34:25,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:34:25,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:34:25,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:34:25,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:34:25,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:34:25,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:34:25,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:34:25,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:34:25,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:34:25,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:34:25,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:34:25,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:34:25,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:34:25,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:34:25,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:34:25,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:34:25,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:34:25,628 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:34:25,654 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:34:25,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:34:25,655 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:34:25,655 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:34:25,655 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:34:25,656 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:34:25,656 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:34:25,656 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:34:25,657 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:34:25,657 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:34:25,657 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:34:25,658 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:34:25,658 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:34:25,658 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:34:25,659 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:34:25,659 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:34:25,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:34:25,660 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:34:25,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:34:25,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:34:25,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:34:25,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:34:25,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:34:25,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:34:25,662 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:34:25,662 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:34:25,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:34:25,663 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:34:25,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:34:25,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:34:25,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:34:25,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:34:25,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:34:25,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:34:25,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:34:25,665 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:34:25,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:34:25,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:34:25,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:34:25,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:34:25,666 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dc34619b8722f38daca39084af716acca2f2990c40299072c7b560e6e3245de [2021-11-12 22:34:25,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:34:25,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:34:25,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:34:25,968 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:34:25,969 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:34:25,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/eca-rers2012/Problem01_label11.c [2021-11-12 22:34:26,069 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/data/37978015e/fcdd81f379274f4ea22defbd90a55e18/FLAG2270f67bc [2021-11-12 22:34:26,646 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:34:26,647 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/sv-benchmarks/c/eca-rers2012/Problem01_label11.c [2021-11-12 22:34:26,662 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/data/37978015e/fcdd81f379274f4ea22defbd90a55e18/FLAG2270f67bc [2021-11-12 22:34:26,918 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/data/37978015e/fcdd81f379274f4ea22defbd90a55e18 [2021-11-12 22:34:26,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:34:26,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:34:26,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:34:26,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:34:26,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:34:26,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:34:26" (1/1) ... [2021-11-12 22:34:26,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f57e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:34:26, skipping insertion in model container [2021-11-12 22:34:26,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:34:26" (1/1) ... [2021-11-12 22:34:26,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:34:27,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:34:27,381 WARN L228 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_9569e281-8296-49ac-a8e0-45898222c3a5/sv-benchmarks/c/eca-rers2012/Problem01_label11.c[19099,19112] [2021-11-12 22:34:27,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:34:27,446 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:34:27,576 WARN L228 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_9569e281-8296-49ac-a8e0-45898222c3a5/sv-benchmarks/c/eca-rers2012/Problem01_label11.c[19099,19112] [2021-11-12 22:34:27,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:34:27,621 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:34:27,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:34:27 WrapperNode [2021-11-12 22:34:27,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:34:27,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:34:27,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:34:27,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:34:27,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:34:27" (1/1) ... [2021-11-12 22:34:27,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:34:27" (1/1) ... [2021-11-12 22:34:27,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:34:27,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:34:27,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:34:27,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:34:27,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:34:27" (1/1) ... [2021-11-12 22:34:27,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:34:27" (1/1) ... [2021-11-12 22:34:27,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:34:27" (1/1) ... [2021-11-12 22:34:27,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:34:27" (1/1) ... [2021-11-12 22:34:27,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:34:27" (1/1) ... [2021-11-12 22:34:27,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:34:27" (1/1) ... [2021-11-12 22:34:27,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:34:27" (1/1) ... [2021-11-12 22:34:27,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:34:27,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:34:27,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:34:27,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:34:27,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:34:27" (1/1) ... [2021-11-12 22:34:27,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:34:27,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:34:27,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:34:27,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:34:27,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:34:27,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:34:27,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:34:27,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:34:29,333 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:34:29,334 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:34:29,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:34:29 BoogieIcfgContainer [2021-11-12 22:34:29,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:34:29,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:34:29,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:34:29,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:34:29,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:34:26" (1/3) ... [2021-11-12 22:34:29,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418d9524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:34:29, skipping insertion in model container [2021-11-12 22:34:29,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:34:27" (2/3) ... [2021-11-12 22:34:29,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418d9524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:34:29, skipping insertion in model container [2021-11-12 22:34:29,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:34:29" (3/3) ... [2021-11-12 22:34:29,349 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label11.c [2021-11-12 22:34:29,358 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:34:29,359 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:34:29,424 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:34:29,439 INFO L339 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=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:34:29,439 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:34:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 22:34:29,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:29,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:29,484 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:29,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:29,490 INFO L85 PathProgramCache]: Analyzing trace with hash 379024263, now seen corresponding path program 1 times [2021-11-12 22:34:29,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:29,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664739269] [2021-11-12 22:34:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:29,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:34:29,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:29,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664739269] [2021-11-12 22:34:29,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664739269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:29,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:29,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:34:29,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012933318] [2021-11-12 22:34:29,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:29,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:34:29,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:29,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:34:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:34:29,994 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:30,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:30,425 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-11-12 22:34:30,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:34:30,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-12 22:34:30,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:30,467 INFO L225 Difference]: With dead ends: 224 [2021-11-12 22:34:30,467 INFO L226 Difference]: Without dead ends: 145 [2021-11-12 22:34:30,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:34:30,475 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 292.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.61ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 363.72ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:30,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 274 Unknown, 0 Unchecked, 6.61ms Time], IncrementalHoareTripleChecker [48 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 363.72ms Time] [2021-11-12 22:34:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-12 22:34:30,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-12 22:34:30,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7986111111111112) internal successors, (259), 144 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:30,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2021-11-12 22:34:30,536 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2021-11-12 22:34:30,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:30,537 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2021-11-12 22:34:30,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2021-11-12 22:34:30,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-12 22:34:30,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:30,547 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:30,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:34:30,549 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:30,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash -615337446, now seen corresponding path program 1 times [2021-11-12 22:34:30,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:30,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401321111] [2021-11-12 22:34:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:30,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:34:30,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:30,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401321111] [2021-11-12 22:34:30,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401321111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:30,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:30,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:34:30,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469695608] [2021-11-12 22:34:30,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:30,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:34:30,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:30,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:34:30,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:34:30,660 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:31,059 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2021-11-12 22:34:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:34:31,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-12 22:34:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:31,063 INFO L225 Difference]: With dead ends: 431 [2021-11-12 22:34:31,063 INFO L226 Difference]: Without dead ends: 287 [2021-11-12 22:34:31,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:34:31,066 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 82 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 279.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.80ms SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 356.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:31,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 32 Invalid, 281 Unknown, 0 Unchecked, 7.80ms Time], IncrementalHoareTripleChecker [71 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 356.65ms Time] [2021-11-12 22:34:31,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-12 22:34:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-11-12 22:34:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.6363636363636365) internal successors, (468), 286 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) [2021-11-12 22:34:31,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2021-11-12 22:34:31,102 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2021-11-12 22:34:31,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:31,103 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2021-11-12 22:34:31,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2021-11-12 22:34:31,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-12 22:34:31,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:31,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:31,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:34:31,119 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:31,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:31,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1583655046, now seen corresponding path program 1 times [2021-11-12 22:34:31,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:31,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728338187] [2021-11-12 22:34:31,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:31,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:34:31,373 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:31,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728338187] [2021-11-12 22:34:31,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728338187] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:31,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:31,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:34:31,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364529564] [2021-11-12 22:34:31,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:31,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:34:31,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:31,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:34:31,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:34:31,379 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:31,931 INFO L93 Difference]: Finished difference Result 784 states and 1255 transitions. [2021-11-12 22:34:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:34:31,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-12 22:34:31,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:31,935 INFO L225 Difference]: With dead ends: 784 [2021-11-12 22:34:31,935 INFO L226 Difference]: Without dead ends: 429 [2021-11-12 22:34:31,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:34:31,939 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 72 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 417.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.68ms SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 500.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:31,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 74 Invalid, 431 Unknown, 0 Unchecked, 8.68ms Time], IncrementalHoareTripleChecker [106 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 500.67ms Time] [2021-11-12 22:34:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-12 22:34:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-11-12 22:34:31,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.3014018691588785) internal successors, (557), 428 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 557 transitions. [2021-11-12 22:34:31,998 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 557 transitions. Word has length 78 [2021-11-12 22:34:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:31,998 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 557 transitions. [2021-11-12 22:34:31,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:31,999 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 557 transitions. [2021-11-12 22:34:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 22:34:32,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:32,003 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:32,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:34:32,004 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:32,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:32,005 INFO L85 PathProgramCache]: Analyzing trace with hash 713139373, now seen corresponding path program 1 times [2021-11-12 22:34:32,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:32,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679357983] [2021-11-12 22:34:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:32,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:34:32,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:32,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679357983] [2021-11-12 22:34:32,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679357983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:32,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:32,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:34:32,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674601580] [2021-11-12 22:34:32,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:32,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:34:32,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:32,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:34:32,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:34:32,127 INFO L87 Difference]: Start difference. First operand 429 states and 557 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 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) [2021-11-12 22:34:32,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:32,382 INFO L93 Difference]: Finished difference Result 857 states and 1138 transitions. [2021-11-12 22:34:32,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:34:32,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 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 83 [2021-11-12 22:34:32,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:32,386 INFO L225 Difference]: With dead ends: 857 [2021-11-12 22:34:32,386 INFO L226 Difference]: Without dead ends: 500 [2021-11-12 22:34:32,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:34:32,389 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 69 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 190.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.00ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 234.92ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:32,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 41 Invalid, 213 Unknown, 0 Unchecked, 2.00ms Time], IncrementalHoareTripleChecker [33 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 234.92ms Time] [2021-11-12 22:34:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-12 22:34:32,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2021-11-12 22:34:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.282565130260521) internal successors, (640), 499 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 640 transitions. [2021-11-12 22:34:32,406 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 640 transitions. Word has length 83 [2021-11-12 22:34:32,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:32,407 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 640 transitions. [2021-11-12 22:34:32,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 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) [2021-11-12 22:34:32,407 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 640 transitions. [2021-11-12 22:34:32,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 22:34:32,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:32,409 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:32,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 22:34:32,410 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:32,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:32,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1234017045, now seen corresponding path program 1 times [2021-11-12 22:34:32,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:32,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853182205] [2021-11-12 22:34:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:32,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:34:32,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:32,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853182205] [2021-11-12 22:34:32,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853182205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:32,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:32,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:34:32,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648563470] [2021-11-12 22:34:32,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:32,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:34:32,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:32,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:34:32,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:34:32,456 INFO L87 Difference]: Start difference. First operand 500 states and 640 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 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) [2021-11-12 22:34:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:32,762 INFO L93 Difference]: Finished difference Result 1283 states and 1651 transitions. [2021-11-12 22:34:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:34:32,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 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 92 [2021-11-12 22:34:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:32,768 INFO L225 Difference]: With dead ends: 1283 [2021-11-12 22:34:32,768 INFO L226 Difference]: Without dead ends: 855 [2021-11-12 22:34:32,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:34:32,771 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 228.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.14ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 282.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:32,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 15 Invalid, 248 Unknown, 0 Unchecked, 2.14ms Time], IncrementalHoareTripleChecker [51 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 282.10ms Time] [2021-11-12 22:34:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-11-12 22:34:32,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 642. [2021-11-12 22:34:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.2776911076443058) internal successors, (819), 641 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 819 transitions. [2021-11-12 22:34:32,795 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 819 transitions. Word has length 92 [2021-11-12 22:34:32,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:32,796 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 819 transitions. [2021-11-12 22:34:32,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 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) [2021-11-12 22:34:32,797 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 819 transitions. [2021-11-12 22:34:32,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 22:34:32,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:32,799 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:32,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 22:34:32,799 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:32,800 INFO L85 PathProgramCache]: Analyzing trace with hash -599286500, now seen corresponding path program 1 times [2021-11-12 22:34:32,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:32,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595526430] [2021-11-12 22:34:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:32,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:34:32,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:32,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595526430] [2021-11-12 22:34:32,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595526430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:32,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:32,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:34:32,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486253181] [2021-11-12 22:34:32,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:32,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:34:32,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:32,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:34:32,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:34:32,856 INFO L87 Difference]: Start difference. First operand 642 states and 819 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 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) [2021-11-12 22:34:33,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:33,277 INFO L93 Difference]: Finished difference Result 1354 states and 1784 transitions. [2021-11-12 22:34:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:34:33,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 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 98 [2021-11-12 22:34:33,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:33,283 INFO L225 Difference]: With dead ends: 1354 [2021-11-12 22:34:33,283 INFO L226 Difference]: Without dead ends: 784 [2021-11-12 22:34:33,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:34:33,285 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 207 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 305.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.92ms SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 391.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:33,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 29 Invalid, 383 Unknown, 0 Unchecked, 2.92ms Time], IncrementalHoareTripleChecker [109 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 391.23ms Time] [2021-11-12 22:34:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-11-12 22:34:33,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2021-11-12 22:34:33,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.2669220945083015) internal successors, (992), 783 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:33,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 992 transitions. [2021-11-12 22:34:33,314 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 992 transitions. Word has length 98 [2021-11-12 22:34:33,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:33,314 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 992 transitions. [2021-11-12 22:34:33,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 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) [2021-11-12 22:34:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 992 transitions. [2021-11-12 22:34:33,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 22:34:33,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:33,317 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:33,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 22:34:33,319 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:33,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1359567929, now seen corresponding path program 1 times [2021-11-12 22:34:33,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:33,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766407748] [2021-11-12 22:34:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:33,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:34:33,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:33,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766407748] [2021-11-12 22:34:33,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766407748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:33,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:33,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:34:33,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468755655] [2021-11-12 22:34:33,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:33,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:34:33,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:33,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:34:33,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:34:33,394 INFO L87 Difference]: Start difference. First operand 784 states and 992 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 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) [2021-11-12 22:34:33,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:33,918 INFO L93 Difference]: Finished difference Result 1780 states and 2274 transitions. [2021-11-12 22:34:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:34:33,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 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 112 [2021-11-12 22:34:33,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:33,924 INFO L225 Difference]: With dead ends: 1780 [2021-11-12 22:34:33,924 INFO L226 Difference]: Without dead ends: 1068 [2021-11-12 22:34:33,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:34:33,931 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 389.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.90ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 476.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:33,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 41 Invalid, 452 Unknown, 0 Unchecked, 3.90ms Time], IncrementalHoareTripleChecker [56 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 476.63ms Time] [2021-11-12 22:34:33,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-11-12 22:34:33,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 997. [2021-11-12 22:34:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.25) internal successors, (1245), 996 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1245 transitions. [2021-11-12 22:34:33,964 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1245 transitions. Word has length 112 [2021-11-12 22:34:33,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:33,965 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1245 transitions. [2021-11-12 22:34:33,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 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) [2021-11-12 22:34:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1245 transitions. [2021-11-12 22:34:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 22:34:33,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:33,968 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:33,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 22:34:33,969 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:33,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:33,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1726472540, now seen corresponding path program 1 times [2021-11-12 22:34:33,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:33,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836463645] [2021-11-12 22:34:33,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:33,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:34:34,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:34,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836463645] [2021-11-12 22:34:34,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836463645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:34,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:34,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:34:34,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709997931] [2021-11-12 22:34:34,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:34,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:34:34,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:34,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:34:34,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:34:34,080 INFO L87 Difference]: Start difference. First operand 997 states and 1245 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:34,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:34,441 INFO L93 Difference]: Finished difference Result 2135 states and 2642 transitions. [2021-11-12 22:34:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:34:34,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 129 [2021-11-12 22:34:34,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:34,449 INFO L225 Difference]: With dead ends: 2135 [2021-11-12 22:34:34,449 INFO L226 Difference]: Without dead ends: 1139 [2021-11-12 22:34:34,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:34:34,452 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 203 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 270.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.41ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 328.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:34,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 28 Invalid, 356 Unknown, 0 Unchecked, 2.41ms Time], IncrementalHoareTripleChecker [96 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 328.53ms Time] [2021-11-12 22:34:34,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-11-12 22:34:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 997. [2021-11-12 22:34:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.2379518072289157) internal successors, (1233), 996 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1233 transitions. [2021-11-12 22:34:34,484 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1233 transitions. Word has length 129 [2021-11-12 22:34:34,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:34,485 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1233 transitions. [2021-11-12 22:34:34,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:34,485 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1233 transitions. [2021-11-12 22:34:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-12 22:34:34,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:34,490 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:34,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 22:34:34,490 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:34,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:34,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1075038556, now seen corresponding path program 1 times [2021-11-12 22:34:34,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:34,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347389151] [2021-11-12 22:34:34,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:34,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 22:34:34,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:34,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347389151] [2021-11-12 22:34:34,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347389151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:34,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:34,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:34:34,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956084276] [2021-11-12 22:34:34,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:34,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:34:34,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:34,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:34:34,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:34:34,584 INFO L87 Difference]: Start difference. First operand 997 states and 1233 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:34,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:34,894 INFO L93 Difference]: Finished difference Result 2206 states and 2722 transitions. [2021-11-12 22:34:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:34:34,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 172 [2021-11-12 22:34:34,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:34,902 INFO L225 Difference]: With dead ends: 2206 [2021-11-12 22:34:34,903 INFO L226 Difference]: Without dead ends: 1210 [2021-11-12 22:34:34,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:34:34,905 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 26 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 223.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.34ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 278.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:34,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 113 Invalid, 240 Unknown, 0 Unchecked, 2.34ms Time], IncrementalHoareTripleChecker [32 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 278.08ms Time] [2021-11-12 22:34:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-11-12 22:34:34,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1139. [2021-11-12 22:34:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 1.2205623901581721) internal successors, (1389), 1138 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1389 transitions. [2021-11-12 22:34:34,966 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1389 transitions. Word has length 172 [2021-11-12 22:34:34,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:34,967 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1389 transitions. [2021-11-12 22:34:34,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:34,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1389 transitions. [2021-11-12 22:34:34,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-12 22:34:34,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:34,972 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:34:34,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 22:34:34,972 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:34,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:34,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1532627273, now seen corresponding path program 1 times [2021-11-12 22:34:34,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:34,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734453197] [2021-11-12 22:34:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:34,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:34:35,252 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:35,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734453197] [2021-11-12 22:34:35,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734453197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:34:35,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314291948] [2021-11-12 22:34:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:35,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:34:35,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:34:35,254 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:34:35,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 22:34:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:35,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:34:35,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-12 22:34:36,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-12 22:34:36,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314291948] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:36,573 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:34:36,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 6 [2021-11-12 22:34:36,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137863735] [2021-11-12 22:34:36,574 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:36,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:34:36,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:36,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:34:36,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:34:36,576 INFO L87 Difference]: Start difference. First operand 1139 states and 1389 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:36,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:36,878 INFO L93 Difference]: Finished difference Result 1780 states and 2132 transitions. [2021-11-12 22:34:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:34:36,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-11-12 22:34:36,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:36,891 INFO L225 Difference]: With dead ends: 1780 [2021-11-12 22:34:36,891 INFO L226 Difference]: Without dead ends: 1778 [2021-11-12 22:34:36,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:34:36,893 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 221.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.74ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 270.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:36,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 215 Unknown, 0 Unchecked, 1.74ms Time], IncrementalHoareTripleChecker [15 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 270.32ms Time] [2021-11-12 22:34:36,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2021-11-12 22:34:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1565. [2021-11-12 22:34:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1564 states have (on average 1.2039641943734016) internal successors, (1883), 1564 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:36,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1883 transitions. [2021-11-12 22:34:36,948 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1883 transitions. Word has length 175 [2021-11-12 22:34:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:36,949 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 1883 transitions. [2021-11-12 22:34:36,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1883 transitions. [2021-11-12 22:34:36,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-12 22:34:36,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:36,955 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:37,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:37,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:34:37,182 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:37,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:37,182 INFO L85 PathProgramCache]: Analyzing trace with hash -588202300, now seen corresponding path program 1 times [2021-11-12 22:34:37,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:37,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353981942] [2021-11-12 22:34:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:37,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 197 proven. 35 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:34:37,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:37,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353981942] [2021-11-12 22:34:37,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353981942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:34:37,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126976980] [2021-11-12 22:34:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:37,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:34:37,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:34:37,334 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:34:37,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 22:34:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:37,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:34:37,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 22:34:38,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 22:34:38,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126976980] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:38,536 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:34:38,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-12 22:34:38,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692625820] [2021-11-12 22:34:38,537 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:38,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:34:38,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:38,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:34:38,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:34:38,541 INFO L87 Difference]: Start difference. First operand 1565 states and 1883 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:38,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:38,861 INFO L93 Difference]: Finished difference Result 3555 states and 4274 transitions. [2021-11-12 22:34:38,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:34:38,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 207 [2021-11-12 22:34:38,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:38,874 INFO L225 Difference]: With dead ends: 3555 [2021-11-12 22:34:38,875 INFO L226 Difference]: Without dead ends: 1991 [2021-11-12 22:34:38,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:34:38,879 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 232.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 280.35ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:38,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 20 Invalid, 244 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [44 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 280.35ms Time] [2021-11-12 22:34:38,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2021-11-12 22:34:38,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1636. [2021-11-12 22:34:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 1.2091743119266054) internal successors, (1977), 1635 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1977 transitions. [2021-11-12 22:34:38,947 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1977 transitions. Word has length 207 [2021-11-12 22:34:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:38,947 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 1977 transitions. [2021-11-12 22:34:38,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:38,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1977 transitions. [2021-11-12 22:34:38,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-12 22:34:38,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:38,953 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:34:38,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:39,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-12 22:34:39,178 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:39,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:39,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1700623796, now seen corresponding path program 1 times [2021-11-12 22:34:39,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:39,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725977513] [2021-11-12 22:34:39,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:39,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 22:34:39,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:39,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725977513] [2021-11-12 22:34:39,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725977513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:39,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:34:39,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:34:39,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207581220] [2021-11-12 22:34:39,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:39,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:34:39,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:39,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:34:39,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:34:39,338 INFO L87 Difference]: Start difference. First operand 1636 states and 1977 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:39,621 INFO L93 Difference]: Finished difference Result 3555 states and 4291 transitions. [2021-11-12 22:34:39,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:34:39,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 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 222 [2021-11-12 22:34:39,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:39,631 INFO L225 Difference]: With dead ends: 3555 [2021-11-12 22:34:39,631 INFO L226 Difference]: Without dead ends: 1636 [2021-11-12 22:34:39,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:34:39,634 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 188.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 249.74ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:39,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 106 Invalid, 227 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [24 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 249.74ms Time] [2021-11-12 22:34:39,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-11-12 22:34:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 926. [2021-11-12 22:34:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.1686486486486487) internal successors, (1081), 925 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1081 transitions. [2021-11-12 22:34:39,665 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1081 transitions. Word has length 222 [2021-11-12 22:34:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:39,666 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1081 transitions. [2021-11-12 22:34:39,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1081 transitions. [2021-11-12 22:34:39,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-12 22:34:39,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:39,673 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-12 22:34:39,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 22:34:39,674 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:39,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:39,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1810001752, now seen corresponding path program 1 times [2021-11-12 22:34:39,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:34:39,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648150346] [2021-11-12 22:34:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:39,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:34:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 342 proven. 110 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 22:34:39,939 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:34:39,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648150346] [2021-11-12 22:34:39,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648150346] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:34:39,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977615717] [2021-11-12 22:34:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:39,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:34:39,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:34:39,941 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:34:39,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 22:34:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:40,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:34:40,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-12 22:34:40,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-11-12 22:34:41,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977615717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:41,263 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:34:41,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2021-11-12 22:34:41,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556017536] [2021-11-12 22:34:41,264 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:41,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:34:41,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:34:41,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:34:41,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:34:41,266 INFO L87 Difference]: Start difference. First operand 926 states and 1081 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:41,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:41,558 INFO L93 Difference]: Finished difference Result 1920 states and 2252 transitions. [2021-11-12 22:34:41,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:34:41,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-11-12 22:34:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:41,560 INFO L225 Difference]: With dead ends: 1920 [2021-11-12 22:34:41,560 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 22:34:41,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 524 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:34:41,563 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 5 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 225.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.95ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 269.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:41,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 94 Invalid, 231 Unknown, 0 Unchecked, 1.95ms Time], IncrementalHoareTripleChecker [40 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 269.24ms Time] [2021-11-12 22:34:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 22:34:41,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 22:34:41,564 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) [2021-11-12 22:34:41,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 22:34:41,565 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 263 [2021-11-12 22:34:41,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:41,565 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 22:34:41,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:34:41,565 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 22:34:41,566 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 22:34:41,568 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 22:34:41,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:41,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-12 22:34:41,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 22:34:42,700 INFO L858 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-11-12 22:34:42,700 INFO L858 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-11-12 22:34:42,701 INFO L858 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-11-12 22:34:42,701 INFO L858 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-11-12 22:34:42,701 INFO L858 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-11-12 22:34:42,701 INFO L858 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-11-12 22:34:42,701 INFO L858 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-11-12 22:34:42,701 INFO L858 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-11-12 22:34:42,701 INFO L858 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-11-12 22:34:42,701 INFO L858 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-11-12 22:34:42,701 INFO L858 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-11-12 22:34:42,702 INFO L858 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-11-12 22:34:42,702 INFO L858 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-11-12 22:34:42,702 INFO L858 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-11-12 22:34:42,702 INFO L858 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-11-12 22:34:42,702 INFO L858 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-11-12 22:34:42,702 INFO L858 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-11-12 22:34:42,702 INFO L858 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-11-12 22:34:42,702 INFO L858 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-11-12 22:34:42,702 INFO L858 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-11-12 22:34:42,703 INFO L858 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-11-12 22:34:42,703 INFO L858 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-11-12 22:34:42,703 INFO L858 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-11-12 22:34:42,703 INFO L858 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-11-12 22:34:42,703 INFO L858 garLoopResultBuilder]: For program point L509-1(lines 40 585) no Hoare annotation was computed. [2021-11-12 22:34:42,703 INFO L858 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-11-12 22:34:42,703 INFO L858 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-11-12 22:34:42,703 INFO L858 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-11-12 22:34:42,704 INFO L858 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-11-12 22:34:42,704 INFO L858 garLoopResultBuilder]: For program point L512-1(lines 40 585) no Hoare annotation was computed. [2021-11-12 22:34:42,704 INFO L858 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-11-12 22:34:42,704 INFO L858 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-11-12 22:34:42,704 INFO L858 garLoopResultBuilder]: For program point L513(line 513) no Hoare annotation was computed. [2021-11-12 22:34:42,704 INFO L858 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-11-12 22:34:42,704 INFO L858 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-11-12 22:34:42,705 INFO L858 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-11-12 22:34:42,705 INFO L858 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-11-12 22:34:42,705 INFO L858 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-11-12 22:34:42,705 INFO L858 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-11-12 22:34:42,705 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-12 22:34:42,705 INFO L858 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-11-12 22:34:42,706 INFO L858 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-11-12 22:34:42,706 INFO L858 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-11-12 22:34:42,707 INFO L854 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse5 (= ~a20~0 1)) (.cse2 (= ~a17~0 1)) (.cse4 (<= ~a8~0 13)) (.cse0 (= ~a16~0 6)) (.cse3 (<= 15 ~a8~0)) (.cse6 (<= ~a17~0 0)) (.cse1 (= ~a21~0 1)) (.cse7 (<= ~a16~0 5))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse5) (and (<= ~a7~0 0) (= ~a12~0 8) .cse1 .cse2 .cse5) (and .cse6 .cse1 .cse5 .cse3) (and .cse1 .cse2 .cse7 .cse3) (and .cse4 .cse2 .cse7) (and .cse4 .cse1 .cse7) (and .cse0 .cse6 .cse1 .cse3) (and .cse6 .cse1 .cse7))) [2021-11-12 22:34:42,707 INFO L858 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-11-12 22:34:42,707 INFO L858 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-11-12 22:34:42,707 INFO L858 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-11-12 22:34:42,708 INFO L858 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-11-12 22:34:42,708 INFO L858 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-11-12 22:34:42,708 INFO L858 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-11-12 22:34:42,708 INFO L858 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-11-12 22:34:42,708 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-12 22:34:42,708 INFO L858 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-11-12 22:34:42,709 INFO L861 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-11-12 22:34:42,709 INFO L858 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-11-12 22:34:42,709 INFO L858 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-11-12 22:34:42,709 INFO L858 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-11-12 22:34:42,709 INFO L858 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-11-12 22:34:42,709 INFO L858 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-11-12 22:34:42,710 INFO L858 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-11-12 22:34:42,710 INFO L858 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-11-12 22:34:42,710 INFO L858 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-11-12 22:34:42,710 INFO L858 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-11-12 22:34:42,710 INFO L858 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-11-12 22:34:42,711 INFO L858 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-11-12 22:34:42,711 INFO L858 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-11-12 22:34:42,711 INFO L858 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-11-12 22:34:42,711 INFO L854 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse5 (= ~a20~0 1)) (.cse2 (= ~a17~0 1)) (.cse4 (<= ~a8~0 13)) (.cse0 (= ~a16~0 6)) (.cse3 (<= 15 ~a8~0)) (.cse6 (<= ~a17~0 0)) (.cse1 (= ~a21~0 1)) (.cse7 (<= ~a16~0 5))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse5) (and (<= ~a7~0 0) (= ~a12~0 8) .cse1 .cse2 .cse5) (and .cse6 .cse1 .cse5 .cse3) (and .cse1 .cse2 .cse7 .cse3) (and .cse4 .cse2 .cse7) (and .cse4 .cse1 .cse7) (and .cse0 .cse6 .cse1 .cse3) (and .cse6 .cse1 .cse7))) [2021-11-12 22:34:42,711 INFO L858 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-11-12 22:34:42,712 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 513) no Hoare annotation was computed. [2021-11-12 22:34:42,712 INFO L858 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-11-12 22:34:42,712 INFO L858 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-11-12 22:34:42,712 INFO L858 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-11-12 22:34:42,712 INFO L858 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-11-12 22:34:42,712 INFO L858 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-11-12 22:34:42,713 INFO L858 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-11-12 22:34:42,716 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:42,717 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:34:42,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 10:34:42 BoogieIcfgContainer [2021-11-12 22:34:42,736 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 22:34:42,736 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 22:34:42,736 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 22:34:42,737 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 22:34:42,737 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:34:29" (3/4) ... [2021-11-12 22:34:42,740 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-12 22:34:42,760 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 110 nodes and edges [2021-11-12 22:34:42,769 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-11-12 22:34:42,771 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-11-12 22:34:42,772 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-12 22:34:42,915 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-12 22:34:42,915 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 22:34:42,916 INFO L158 Benchmark]: Toolchain (without parser) took 15993.70ms. Allocated memory was 104.9MB in the beginning and 285.2MB in the end (delta: 180.4MB). Free memory was 60.5MB in the beginning and 211.0MB in the end (delta: -150.5MB). Peak memory consumption was 28.7MB. Max. memory is 16.1GB. [2021-11-12 22:34:42,916 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 104.9MB. Free memory was 78.5MB in the beginning and 78.4MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:34:42,917 INFO L158 Benchmark]: CACSL2BoogieTranslator took 692.53ms. Allocated memory is still 104.9MB. Free memory was 60.3MB in the beginning and 61.9MB in the end (delta: -1.6MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. [2021-11-12 22:34:42,918 INFO L158 Benchmark]: Boogie Procedure Inliner took 110.01ms. Allocated memory is still 104.9MB. Free memory was 61.9MB in the beginning and 56.2MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-12 22:34:42,918 INFO L158 Benchmark]: Boogie Preprocessor took 101.13ms. Allocated memory is still 104.9MB. Free memory was 56.2MB in the beginning and 52.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-12 22:34:42,918 INFO L158 Benchmark]: RCFGBuilder took 1501.13ms. Allocated memory was 104.9MB in the beginning and 144.7MB in the end (delta: 39.8MB). Free memory was 51.7MB in the beginning and 97.3MB in the end (delta: -45.6MB). Peak memory consumption was 34.0MB. Max. memory is 16.1GB. [2021-11-12 22:34:42,919 INFO L158 Benchmark]: TraceAbstraction took 13395.36ms. Allocated memory was 144.7MB in the beginning and 285.2MB in the end (delta: 140.5MB). Free memory was 96.3MB in the beginning and 225.7MB in the end (delta: -129.5MB). Peak memory consumption was 124.3MB. Max. memory is 16.1GB. [2021-11-12 22:34:42,920 INFO L158 Benchmark]: Witness Printer took 179.20ms. Allocated memory is still 285.2MB. Free memory was 225.7MB in the beginning and 211.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:34:42,922 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 104.9MB. Free memory was 78.5MB in the beginning and 78.4MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 692.53ms. Allocated memory is still 104.9MB. Free memory was 60.3MB in the beginning and 61.9MB in the end (delta: -1.6MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 110.01ms. Allocated memory is still 104.9MB. Free memory was 61.9MB in the beginning and 56.2MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 101.13ms. Allocated memory is still 104.9MB. Free memory was 56.2MB in the beginning and 52.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1501.13ms. Allocated memory was 104.9MB in the beginning and 144.7MB in the end (delta: 39.8MB). Free memory was 51.7MB in the beginning and 97.3MB in the end (delta: -45.6MB). Peak memory consumption was 34.0MB. Max. memory is 16.1GB. * TraceAbstraction took 13395.36ms. Allocated memory was 144.7MB in the beginning and 285.2MB in the end (delta: 140.5MB). Free memory was 96.3MB in the beginning and 225.7MB in the end (delta: -129.5MB). Peak memory consumption was 124.3MB. Max. memory is 16.1GB. * Witness Printer took 179.20ms. Allocated memory is still 285.2MB. Free memory was 225.7MB in the beginning and 211.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. 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 - PositiveResult [Line: 513]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.3s, OverallIterations: 13, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 970 SdHoareTripleChecker+Valid, 4282.15ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 970 mSDsluCounter, 649 SdHoareTripleChecker+Invalid, 3464.46ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 63 mSDsCounter, 725 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3070 IncrementalHoareTripleChecker+Invalid, 3795 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 725 mSolverCounterUnsat, 587 mSDtfsCounter, 3070 mSolverCounterSat, 45.87ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1328 GetRequests, 1295 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1636occurred in iteration=11, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 13 MinimizatonAttempts, 1775 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 43 NumberOfFragments, 213 HoareAnnotationTreeSize, 3 FomulaSimplifications, 226 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4248 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 2424 NumberOfCodeBlocks, 2424 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 3050 ConstructedInterpolants, 0 QuantifiedInterpolants, 12370 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1428 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 19 InterpolantComputations, 16 PerfectInterpolantSequences, 3217/3454 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a16 == 6 && a21 == 1) && a17 == 1) && 15 <= a8) || (a8 <= 13 && a20 == 1)) || ((((a7 <= 0 && a12 == 8) && a21 == 1) && a17 == 1) && a20 == 1)) || (((a17 <= 0 && a21 == 1) && a20 == 1) && 15 <= a8)) || (((a21 == 1 && a17 == 1) && a16 <= 5) && 15 <= a8)) || ((a8 <= 13 && a17 == 1) && a16 <= 5)) || ((a8 <= 13 && a21 == 1) && a16 <= 5)) || (((a16 == 6 && a17 <= 0) && a21 == 1) && 15 <= a8)) || ((a17 <= 0 && a21 == 1) && a16 <= 5) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((a16 == 6 && a21 == 1) && a17 == 1) && 15 <= a8) || (a8 <= 13 && a20 == 1)) || ((((a7 <= 0 && a12 == 8) && a21 == 1) && a17 == 1) && a20 == 1)) || (((a17 <= 0 && a21 == 1) && a20 == 1) && 15 <= a8)) || (((a21 == 1 && a17 == 1) && a16 <= 5) && 15 <= a8)) || ((a8 <= 13 && a17 == 1) && a16 <= 5)) || ((a8 <= 13 && a21 == 1) && a16 <= 5)) || (((a16 == 6 && a17 <= 0) && a21 == 1) && 15 <= a8)) || ((a17 <= 0 && a21 == 1) && a16 <= 5) RESULT: Ultimate proved your program to be correct! [2021-11-12 22:34:43,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9569e281-8296-49ac-a8e0-45898222c3a5/bin/utaipan-vmNK8stdcF/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 Writing output log to file Ultimate.log Result: TRUE