./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9 --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 3fd48462b17ddbaf278fc488df1a3ae435e9f6d18bb30b30a9517aad37d6aece --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 20:59:00,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:59:00,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:59:00,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:59:00,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:59:00,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:59:00,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:59:00,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:59:00,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:59:00,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:59:00,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:59:00,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:59:00,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:59:00,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:59:00,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:59:00,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:59:00,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:59:00,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:59:00,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:59:00,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:59:00,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:59:00,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:59:00,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:59:00,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:59:00,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:59:00,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:59:00,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:59:00,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:59:00,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:59:00,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:59:00,685 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:59:00,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:59:00,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:59:00,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:59:00,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:59:00,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:59:00,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:59:00,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:59:00,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:59:00,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:59:00,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:59:00,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:59:00,733 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:59:00,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:59:00,734 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:59:00,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:59:00,735 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:59:00,735 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:59:00,735 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:59:00,736 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:59:00,736 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:59:00,736 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:59:00,737 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:59:00,737 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:59:00,737 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:59:00,738 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:59:00,738 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:59:00,738 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:59:00,738 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:59:00,738 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:59:00,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:59:00,739 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:59:00,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:59:00,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:59:00,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:59:00,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:59:00,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:59:00,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:59:00,741 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:59:00,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:59:00,741 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:59:00,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:59:00,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:59:00,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:59:00,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:59:00,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:59:00,743 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:59:00,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:59:00,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:59:00,743 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:59:00,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:59:00,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:59:00,744 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:59:00,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fd48462b17ddbaf278fc488df1a3ae435e9f6d18bb30b30a9517aad37d6aece [2022-11-20 20:59:01,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:59:01,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:59:01,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:59:01,064 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:59:01,064 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:59:01,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2022-11-20 20:59:04,070 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:59:04,285 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:59:04,285 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2022-11-20 20:59:04,295 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/data/56bb00ade/c049832fea0b4a67b1f100f13a3fd38e/FLAG59bff0766 [2022-11-20 20:59:04,322 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/data/56bb00ade/c049832fea0b4a67b1f100f13a3fd38e [2022-11-20 20:59:04,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:59:04,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:59:04,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:59:04,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:59:04,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:59:04,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:59:04" (1/1) ... [2022-11-20 20:59:04,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58fdf80e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:04, skipping insertion in model container [2022-11-20 20:59:04,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:59:04" (1/1) ... [2022-11-20 20:59:04,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:59:04,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:59:04,616 WARN L237 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_3b212d12-2d11-425d-81ac-e5830534a143/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[6778,6791] [2022-11-20 20:59:04,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:59:04,673 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:59:04,735 WARN L237 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_3b212d12-2d11-425d-81ac-e5830534a143/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[6778,6791] [2022-11-20 20:59:04,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:59:04,821 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:59:04,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:04 WrapperNode [2022-11-20 20:59:04,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:59:04,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:59:04,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:59:04,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:59:04,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:04" (1/1) ... [2022-11-20 20:59:04,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:04" (1/1) ... [2022-11-20 20:59:04,875 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 527 [2022-11-20 20:59:04,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:59:04,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:59:04,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:59:04,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:59:04,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:04" (1/1) ... [2022-11-20 20:59:04,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:04" (1/1) ... [2022-11-20 20:59:04,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:04" (1/1) ... [2022-11-20 20:59:04,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:04" (1/1) ... [2022-11-20 20:59:04,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:04" (1/1) ... [2022-11-20 20:59:04,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:04" (1/1) ... [2022-11-20 20:59:04,905 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:04" (1/1) ... [2022-11-20 20:59:04,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:04" (1/1) ... [2022-11-20 20:59:04,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:59:04,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:59:04,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:59:04,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:59:04,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:04" (1/1) ... [2022-11-20 20:59:04,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:59:04,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:59:04,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:59:05,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:59:05,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:59:05,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:59:05,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:59:05,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:59:05,154 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:59:05,156 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:59:05,785 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:59:05,929 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:59:05,929 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 20:59:05,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:59:05 BoogieIcfgContainer [2022-11-20 20:59:05,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:59:05,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:59:05,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:59:05,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:59:05,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:59:04" (1/3) ... [2022-11-20 20:59:05,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e82aac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:59:05, skipping insertion in model container [2022-11-20 20:59:05,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:04" (2/3) ... [2022-11-20 20:59:05,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e82aac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:59:05, skipping insertion in model container [2022-11-20 20:59:05,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:59:05" (3/3) ... [2022-11-20 20:59:05,942 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2022-11-20 20:59:05,961 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:59:05,961 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:59:06,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:59:06,043 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@69778cdb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:59:06,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:59:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 86 states have (on average 1.755813953488372) internal successors, (151), 87 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 20:59:06,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:59:06,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:59:06,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:59:06,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:59:06,072 INFO L85 PathProgramCache]: Analyzing trace with hash 113727129, now seen corresponding path program 1 times [2022-11-20 20:59:06,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:59:06,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325896785] [2022-11-20 20:59:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:06,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:59:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:59:06,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:59:06,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325896785] [2022-11-20 20:59:06,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325896785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:59:06,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:59:06,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:59:06,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640016735] [2022-11-20 20:59:06,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:59:06,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:59:06,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:59:06,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:59:06,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:59:06,671 INFO L87 Difference]: Start difference. First operand has 88 states, 86 states have (on average 1.755813953488372) internal successors, (151), 87 states have internal predecessors, (151), 0 states have call successors, (0), 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 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:59:06,841 INFO L93 Difference]: Finished difference Result 151 states and 247 transitions. [2022-11-20 20:59:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:59:06,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-20 20:59:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:59:06,852 INFO L225 Difference]: With dead ends: 151 [2022-11-20 20:59:06,852 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 20:59:06,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:59:06,858 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 403 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:59:06,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 95 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:59:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 20:59:06,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-20 20:59:06,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 85 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2022-11-20 20:59:06,902 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 53 [2022-11-20 20:59:06,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:59:06,903 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2022-11-20 20:59:06,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2022-11-20 20:59:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 20:59:06,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:59:06,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:59:06,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:59:06,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:59:06,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:59:06,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2144841617, now seen corresponding path program 1 times [2022-11-20 20:59:06,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:59:06,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924272930] [2022-11-20 20:59:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:06,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:59:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:59:07,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:59:07,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924272930] [2022-11-20 20:59:07,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924272930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:59:07,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:59:07,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:59:07,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547003046] [2022-11-20 20:59:07,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:59:07,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:59:07,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:59:07,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:59:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:59:07,103 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:07,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:59:07,212 INFO L93 Difference]: Finished difference Result 135 states and 167 transitions. [2022-11-20 20:59:07,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:59:07,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-20 20:59:07,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:59:07,214 INFO L225 Difference]: With dead ends: 135 [2022-11-20 20:59:07,214 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 20:59:07,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:59:07,216 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 245 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:59:07,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 71 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:59:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 20:59:07,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-20 20:59:07,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.188235294117647) internal successors, (101), 85 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2022-11-20 20:59:07,230 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 54 [2022-11-20 20:59:07,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:59:07,231 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2022-11-20 20:59:07,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:07,231 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2022-11-20 20:59:07,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 20:59:07,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:59:07,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:59:07,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:59:07,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:59:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:59:07,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1354679911, now seen corresponding path program 1 times [2022-11-20 20:59:07,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:59:07,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172887216] [2022-11-20 20:59:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:07,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:59:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:59:07,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:59:07,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172887216] [2022-11-20 20:59:07,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172887216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:59:07,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:59:07,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:59:07,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541620606] [2022-11-20 20:59:07,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:59:07,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:59:07,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:59:07,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:59:07,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:59:07,371 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:59:07,471 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2022-11-20 20:59:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:59:07,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-20 20:59:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:59:07,472 INFO L225 Difference]: With dead ends: 131 [2022-11-20 20:59:07,472 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 20:59:07,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:59:07,474 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 227 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:59:07,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 79 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:59:07,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 20:59:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-20 20:59:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 85 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2022-11-20 20:59:07,488 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 55 [2022-11-20 20:59:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:59:07,489 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2022-11-20 20:59:07,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2022-11-20 20:59:07,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 20:59:07,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:59:07,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:59:07,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:59:07,491 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:59:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:59:07,492 INFO L85 PathProgramCache]: Analyzing trace with hash -45577339, now seen corresponding path program 1 times [2022-11-20 20:59:07,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:59:07,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121092412] [2022-11-20 20:59:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:07,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:59:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:59:07,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:59:07,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121092412] [2022-11-20 20:59:07,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121092412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:59:07,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:59:07,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:59:07,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668979893] [2022-11-20 20:59:07,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:59:07,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:59:07,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:59:07,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:59:07,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:59:07,659 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:07,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:59:07,764 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2022-11-20 20:59:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:59:07,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2022-11-20 20:59:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:59:07,768 INFO L225 Difference]: With dead ends: 139 [2022-11-20 20:59:07,768 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 20:59:07,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:59:07,770 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 244 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:59:07,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 63 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:59:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 20:59:07,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-20 20:59:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 85 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2022-11-20 20:59:07,786 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 56 [2022-11-20 20:59:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:59:07,786 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2022-11-20 20:59:07,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2022-11-20 20:59:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 20:59:07,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:59:07,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:59:07,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 20:59:07,788 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:59:07,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:59:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1642367615, now seen corresponding path program 1 times [2022-11-20 20:59:07,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:59:07,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107769292] [2022-11-20 20:59:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:07,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:59:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:59:13,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:59:13,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107769292] [2022-11-20 20:59:13,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107769292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:59:13,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:59:13,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-20 20:59:13,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954482741] [2022-11-20 20:59:13,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:59:13,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 20:59:13,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:59:13,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 20:59:13,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-11-20 20:59:13,716 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:59:19,049 INFO L93 Difference]: Finished difference Result 151 states and 182 transitions. [2022-11-20 20:59:19,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 20:59:19,049 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-20 20:59:19,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:59:19,050 INFO L225 Difference]: With dead ends: 151 [2022-11-20 20:59:19,051 INFO L226 Difference]: Without dead ends: 117 [2022-11-20 20:59:19,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=630, Invalid=1920, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 20:59:19,053 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 443 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:59:19,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 938 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 20:59:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-20 20:59:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2022-11-20 20:59:19,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 114 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) [2022-11-20 20:59:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2022-11-20 20:59:19,086 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 57 [2022-11-20 20:59:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:59:19,090 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2022-11-20 20:59:19,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2022-11-20 20:59:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 20:59:19,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:59:19,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:59:19,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 20:59:19,099 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:59:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:59:19,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1120292740, now seen corresponding path program 1 times [2022-11-20 20:59:19,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:59:19,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538442994] [2022-11-20 20:59:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:19,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:59:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:59:19,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:59:19,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538442994] [2022-11-20 20:59:19,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538442994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:59:19,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:59:19,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:59:19,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448401445] [2022-11-20 20:59:19,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:59:19,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:59:19,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:59:19,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:59:19,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:59:19,306 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:19,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:59:19,371 INFO L93 Difference]: Finished difference Result 241 states and 301 transitions. [2022-11-20 20:59:19,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:59:19,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-11-20 20:59:19,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:59:19,377 INFO L225 Difference]: With dead ends: 241 [2022-11-20 20:59:19,378 INFO L226 Difference]: Without dead ends: 178 [2022-11-20 20:59:19,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:59:19,384 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 87 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:59:19,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 183 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:59:19,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-20 20:59:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2022-11-20 20:59:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.2342857142857142) internal successors, (216), 175 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 216 transitions. [2022-11-20 20:59:19,430 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 216 transitions. Word has length 59 [2022-11-20 20:59:19,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:59:19,430 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 216 transitions. [2022-11-20 20:59:19,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 216 transitions. [2022-11-20 20:59:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 20:59:19,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:59:19,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:59:19,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 20:59:19,438 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:59:19,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:59:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1281730169, now seen corresponding path program 1 times [2022-11-20 20:59:19,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:59:19,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675211160] [2022-11-20 20:59:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:19,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:59:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:59:26,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:59:26,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675211160] [2022-11-20 20:59:26,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675211160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:59:26,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:59:26,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-11-20 20:59:26,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006509645] [2022-11-20 20:59:26,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:59:26,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 20:59:26,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:59:26,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 20:59:26,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-11-20 20:59:26,091 INFO L87 Difference]: Start difference. First operand 176 states and 216 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:34,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:59:34,075 INFO L93 Difference]: Finished difference Result 365 states and 465 transitions. [2022-11-20 20:59:34,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 20:59:34,079 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-11-20 20:59:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:59:34,083 INFO L225 Difference]: With dead ends: 365 [2022-11-20 20:59:34,083 INFO L226 Difference]: Without dead ends: 241 [2022-11-20 20:59:34,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=765, Invalid=2097, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 20:59:34,093 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 376 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:59:34,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 658 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 20:59:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-20 20:59:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2022-11-20 20:59:34,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.2521008403361344) internal successors, (298), 238 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 298 transitions. [2022-11-20 20:59:34,143 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 298 transitions. Word has length 59 [2022-11-20 20:59:34,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:59:34,144 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 298 transitions. [2022-11-20 20:59:34,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:34,145 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 298 transitions. [2022-11-20 20:59:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 20:59:34,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:59:34,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:59:34,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 20:59:34,146 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:59:34,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:59:34,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1086255460, now seen corresponding path program 1 times [2022-11-20 20:59:34,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:59:34,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647672576] [2022-11-20 20:59:34,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:34,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:59:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:59:34,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:59:34,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647672576] [2022-11-20 20:59:34,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647672576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:59:34,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:59:34,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:59:34,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768919763] [2022-11-20 20:59:34,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:59:34,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:59:34,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:59:34,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:59:34,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:59:34,427 INFO L87 Difference]: Start difference. First operand 239 states and 298 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:59:34,628 INFO L93 Difference]: Finished difference Result 466 states and 595 transitions. [2022-11-20 20:59:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:59:34,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-20 20:59:34,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:59:34,631 INFO L225 Difference]: With dead ends: 466 [2022-11-20 20:59:34,631 INFO L226 Difference]: Without dead ends: 371 [2022-11-20 20:59:34,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:59:34,632 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 203 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:59:34,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 493 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:59:34,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-20 20:59:34,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 206. [2022-11-20 20:59:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.2341463414634146) internal successors, (253), 205 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 253 transitions. [2022-11-20 20:59:34,672 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 253 transitions. Word has length 60 [2022-11-20 20:59:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:59:34,673 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 253 transitions. [2022-11-20 20:59:34,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:34,673 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 253 transitions. [2022-11-20 20:59:34,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 20:59:34,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:59:34,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:59:34,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:59:34,675 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:59:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:59:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash 695171403, now seen corresponding path program 1 times [2022-11-20 20:59:34,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:59:34,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164105040] [2022-11-20 20:59:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:34,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:59:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:59:34,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:59:34,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164105040] [2022-11-20 20:59:34,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164105040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:59:34,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:59:34,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:59:34,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581496485] [2022-11-20 20:59:34,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:59:34,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:59:34,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:59:34,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:59:34,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:59:34,804 INFO L87 Difference]: Start difference. First operand 206 states and 253 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:34,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:59:34,907 INFO L93 Difference]: Finished difference Result 423 states and 536 transitions. [2022-11-20 20:59:34,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:59:34,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2022-11-20 20:59:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:59:34,909 INFO L225 Difference]: With dead ends: 423 [2022-11-20 20:59:34,909 INFO L226 Difference]: Without dead ends: 269 [2022-11-20 20:59:34,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:59:34,910 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 35 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:59:34,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 194 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:59:34,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-20 20:59:34,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 251. [2022-11-20 20:59:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.24) internal successors, (310), 250 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 310 transitions. [2022-11-20 20:59:34,961 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 310 transitions. Word has length 73 [2022-11-20 20:59:34,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:59:34,961 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 310 transitions. [2022-11-20 20:59:34,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 310 transitions. [2022-11-20 20:59:34,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 20:59:34,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:59:34,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:59:34,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 20:59:34,963 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:59:34,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:59:34,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1178892447, now seen corresponding path program 1 times [2022-11-20 20:59:34,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:59:34,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937417169] [2022-11-20 20:59:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:34,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:59:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:59:35,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:59:35,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937417169] [2022-11-20 20:59:35,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937417169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:59:35,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:59:35,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:59:35,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373041860] [2022-11-20 20:59:35,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:59:35,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:59:35,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:59:35,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:59:35,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:59:35,082 INFO L87 Difference]: Start difference. First operand 251 states and 310 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:59:35,212 INFO L93 Difference]: Finished difference Result 594 states and 759 transitions. [2022-11-20 20:59:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:59:35,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-20 20:59:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:59:35,214 INFO L225 Difference]: With dead ends: 594 [2022-11-20 20:59:35,218 INFO L226 Difference]: Without dead ends: 399 [2022-11-20 20:59:35,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:59:35,220 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 30 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:59:35,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 187 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:59:35,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-11-20 20:59:35,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 373. [2022-11-20 20:59:35,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.2580645161290323) internal successors, (468), 372 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 468 transitions. [2022-11-20 20:59:35,296 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 468 transitions. Word has length 76 [2022-11-20 20:59:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:59:35,297 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 468 transitions. [2022-11-20 20:59:35,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:35,297 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 468 transitions. [2022-11-20 20:59:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 20:59:35,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:59:35,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:59:35,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 20:59:35,299 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:59:35,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:59:35,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1522914936, now seen corresponding path program 1 times [2022-11-20 20:59:35,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:59:35,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382803969] [2022-11-20 20:59:35,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:35,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:59:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:59:35,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:59:35,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382803969] [2022-11-20 20:59:35,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382803969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:59:35,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:59:35,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:59:35,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264600646] [2022-11-20 20:59:35,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:59:35,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:59:35,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:59:35,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:59:35,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:59:35,433 INFO L87 Difference]: Start difference. First operand 373 states and 468 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:35,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:59:35,599 INFO L93 Difference]: Finished difference Result 978 states and 1257 transitions. [2022-11-20 20:59:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:59:35,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2022-11-20 20:59:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:59:35,602 INFO L225 Difference]: With dead ends: 978 [2022-11-20 20:59:35,603 INFO L226 Difference]: Without dead ends: 661 [2022-11-20 20:59:35,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:59:35,604 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 25 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:59:35,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 180 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:59:35,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-11-20 20:59:35,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 623. [2022-11-20 20:59:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 1.270096463022508) internal successors, (790), 622 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 790 transitions. [2022-11-20 20:59:35,732 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 790 transitions. Word has length 79 [2022-11-20 20:59:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:59:35,733 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 790 transitions. [2022-11-20 20:59:35,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 790 transitions. [2022-11-20 20:59:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-20 20:59:35,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:59:35,734 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:59:35,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 20:59:35,734 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:59:35,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:59:35,735 INFO L85 PathProgramCache]: Analyzing trace with hash 831259008, now seen corresponding path program 1 times [2022-11-20 20:59:35,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:59:35,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62439393] [2022-11-20 20:59:35,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:35,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:59:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:59:35,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:59:35,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62439393] [2022-11-20 20:59:35,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62439393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:59:35,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:59:35,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:59:35,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595452779] [2022-11-20 20:59:35,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:59:35,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:59:35,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:59:35,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:59:35,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:59:35,856 INFO L87 Difference]: Start difference. First operand 623 states and 790 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:59:36,125 INFO L93 Difference]: Finished difference Result 1746 states and 2247 transitions. [2022-11-20 20:59:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:59:36,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-11-20 20:59:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:59:36,130 INFO L225 Difference]: With dead ends: 1746 [2022-11-20 20:59:36,130 INFO L226 Difference]: Without dead ends: 1179 [2022-11-20 20:59:36,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:59:36,132 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 20 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:59:36,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 169 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:59:36,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-11-20 20:59:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1117. [2022-11-20 20:59:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 1.2741935483870968) internal successors, (1422), 1116 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:36,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1422 transitions. [2022-11-20 20:59:36,349 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1422 transitions. Word has length 82 [2022-11-20 20:59:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:59:36,350 INFO L495 AbstractCegarLoop]: Abstraction has 1117 states and 1422 transitions. [2022-11-20 20:59:36,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:59:36,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1422 transitions. [2022-11-20 20:59:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-20 20:59:36,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:59:36,351 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:59:36,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 20:59:36,351 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:59:36,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:59:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash -930017220, now seen corresponding path program 1 times [2022-11-20 20:59:36,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:59:36,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026616968] [2022-11-20 20:59:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:36,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:59:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:59:59,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:59:59,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026616968] [2022-11-20 20:59:59,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026616968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:59:59,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361242791] [2022-11-20 20:59:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:59:59,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:59:59,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:59:59,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:59:59,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b212d12-2d11-425d-81ac-e5830534a143/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:59:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:59:59,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-20 20:59:59,843 INFO L286 TraceCheckSpWp]: Computing forward predicates...