./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI --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 834ccc2d6e5ce947bfece9c1e11f57131346eaac8927553a9495d7568350ac6e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:50:58,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:50:58,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:50:58,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:50:58,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:50:58,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:50:58,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:50:58,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:50:58,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:50:58,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:50:58,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:50:58,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:50:58,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:50:58,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:50:58,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:50:58,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:50:58,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:50:58,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:50:58,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:50:58,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:50:58,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:50:58,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:50:58,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:50:58,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:50:58,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:50:58,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:50:58,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:50:58,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:50:58,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:50:58,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:50:58,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:50:58,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:50:58,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:50:58,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:50:58,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:50:58,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:50:58,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:50:58,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:50:58,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:50:58,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:50:58,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:50:58,564 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:50:58,597 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:50:58,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:50:58,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:50:58,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:50:58,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:50:58,608 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:50:58,608 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:50:58,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:50:58,608 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:50:58,609 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:50:58,610 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:50:58,610 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:50:58,611 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:50:58,611 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:50:58,611 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:50:58,612 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:50:58,612 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:50:58,612 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:50:58,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:50:58,613 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:50:58,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:50:58,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:50:58,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:50:58,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:50:58,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:50:58,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:50:58,616 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:50:58,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:50:58,618 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:50:58,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:50:58,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:50:58,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:50:58,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:50:58,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:50:58,620 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:50:58,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:50:58,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:50:58,621 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:50:58,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:50:58,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:50:58,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:50:58,622 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_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 834ccc2d6e5ce947bfece9c1e11f57131346eaac8927553a9495d7568350ac6e [2022-11-03 03:50:58,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:50:58,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:50:58,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:50:58,968 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:50:58,969 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:50:58,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/systemc/token_ring.09.cil-1.c [2022-11-03 03:50:59,050 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/data/691b2a55a/3803bfb02e474297bd04679cb44e8ae9/FLAGf5ed3a79e [2022-11-03 03:50:59,511 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:50:59,511 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/sv-benchmarks/c/systemc/token_ring.09.cil-1.c [2022-11-03 03:50:59,523 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/data/691b2a55a/3803bfb02e474297bd04679cb44e8ae9/FLAGf5ed3a79e [2022-11-03 03:50:59,857 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/data/691b2a55a/3803bfb02e474297bd04679cb44e8ae9 [2022-11-03 03:50:59,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:50:59,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:50:59,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:50:59,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:50:59,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:50:59,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:50:59" (1/1) ... [2022-11-03 03:50:59,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@710af96a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:59, skipping insertion in model container [2022-11-03 03:50:59,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:50:59" (1/1) ... [2022-11-03 03:50:59,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:50:59,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:51:00,157 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/sv-benchmarks/c/systemc/token_ring.09.cil-1.c[671,684] [2022-11-03 03:51:00,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:51:00,361 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:51:00,373 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/sv-benchmarks/c/systemc/token_ring.09.cil-1.c[671,684] [2022-11-03 03:51:00,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:51:00,493 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:51:00,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:00 WrapperNode [2022-11-03 03:51:00,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:51:00,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:51:00,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:51:00,496 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:51:00,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:00" (1/1) ... [2022-11-03 03:51:00,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:00" (1/1) ... [2022-11-03 03:51:00,564 INFO L138 Inliner]: procedures = 46, calls = 58, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 679 [2022-11-03 03:51:00,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:51:00,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:51:00,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:51:00,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:51:00,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:00" (1/1) ... [2022-11-03 03:51:00,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:00" (1/1) ... [2022-11-03 03:51:00,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:00" (1/1) ... [2022-11-03 03:51:00,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:00" (1/1) ... [2022-11-03 03:51:00,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:00" (1/1) ... [2022-11-03 03:51:00,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:00" (1/1) ... [2022-11-03 03:51:00,599 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:00" (1/1) ... [2022-11-03 03:51:00,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:00" (1/1) ... [2022-11-03 03:51:00,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:51:00,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:51:00,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:51:00,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:51:00,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:00" (1/1) ... [2022-11-03 03:51:00,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:51:00,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:00,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:51:00,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:51:00,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:51:00,692 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 03:51:00,693 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 03:51:00,693 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 03:51:00,693 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 03:51:00,693 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 03:51:00,693 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 03:51:00,694 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 03:51:00,694 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 03:51:00,694 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 03:51:00,694 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 03:51:00,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:51:00,695 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 03:51:00,695 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 03:51:00,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:51:00,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:51:00,827 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:51:00,829 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:51:01,531 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:51:02,008 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:51:02,008 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-03 03:51:02,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:02 BoogieIcfgContainer [2022-11-03 03:51:02,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:51:02,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:51:02,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:51:02,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:51:02,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:50:59" (1/3) ... [2022-11-03 03:51:02,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef58911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:02, skipping insertion in model container [2022-11-03 03:51:02,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:00" (2/3) ... [2022-11-03 03:51:02,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef58911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:02, skipping insertion in model container [2022-11-03 03:51:02,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:02" (3/3) ... [2022-11-03 03:51:02,022 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.09.cil-1.c [2022-11-03 03:51:02,042 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:51:02,042 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:51:02,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:51:02,143 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;@302a7fed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:51:02,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:51:02,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 124 states have (on average 1.5483870967741935) internal successors, (192), 126 states have internal predecessors, (192), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-03 03:51:02,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 03:51:02,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:02,165 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] [2022-11-03 03:51:02,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:02,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:02,173 INFO L85 PathProgramCache]: Analyzing trace with hash 140461399, now seen corresponding path program 1 times [2022-11-03 03:51:02,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:02,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021358584] [2022-11-03 03:51:02,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:02,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:02,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:02,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021358584] [2022-11-03 03:51:02,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021358584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:02,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:02,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:51:02,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016303664] [2022-11-03 03:51:02,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:02,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:51:02,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:51:02,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:51:02,811 INFO L87 Difference]: Start difference. First operand has 155 states, 124 states have (on average 1.5483870967741935) internal successors, (192), 126 states have internal predecessors, (192), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:51:03,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:03,355 INFO L93 Difference]: Finished difference Result 448 states and 714 transitions. [2022-11-03 03:51:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:51:03,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-11-03 03:51:03,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:03,378 INFO L225 Difference]: With dead ends: 448 [2022-11-03 03:51:03,379 INFO L226 Difference]: Without dead ends: 294 [2022-11-03 03:51:03,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:51:03,393 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 409 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:03,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 642 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:51:03,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-03 03:51:03,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2022-11-03 03:51:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 238 states have (on average 1.495798319327731) internal successors, (356), 240 states have internal predecessors, (356), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-03 03:51:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 440 transitions. [2022-11-03 03:51:03,510 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 440 transitions. Word has length 57 [2022-11-03 03:51:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:03,511 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 440 transitions. [2022-11-03 03:51:03,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:51:03,512 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 440 transitions. [2022-11-03 03:51:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 03:51:03,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:03,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:03,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:51:03,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:03,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:03,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1163694088, now seen corresponding path program 1 times [2022-11-03 03:51:03,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:03,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384422335] [2022-11-03 03:51:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:03,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:51:03,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:03,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384422335] [2022-11-03 03:51:03,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384422335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:51:03,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183022936] [2022-11-03 03:51:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:03,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:03,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:03,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:03,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:51:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:04,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:51:04,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:51:04,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:04,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183022936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:04,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:51:04,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:51:04,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660958260] [2022-11-03 03:51:04,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:04,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:04,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:04,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:04,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:51:04,281 INFO L87 Difference]: Start difference. First operand 293 states and 440 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:51:04,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:04,448 INFO L93 Difference]: Finished difference Result 862 states and 1317 transitions. [2022-11-03 03:51:04,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:51:04,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 114 [2022-11-03 03:51:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:04,454 INFO L225 Difference]: With dead ends: 862 [2022-11-03 03:51:04,454 INFO L226 Difference]: Without dead ends: 574 [2022-11-03 03:51:04,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:51:04,456 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 186 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:04,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 417 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-11-03 03:51:04,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 570. [2022-11-03 03:51:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 467 states have (on average 1.4925053533190578) internal successors, (697), 470 states have internal predecessors, (697), 78 states have call successors, (78), 24 states have call predecessors, (78), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-03 03:51:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 853 transitions. [2022-11-03 03:51:04,526 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 853 transitions. Word has length 114 [2022-11-03 03:51:04,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:04,526 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 853 transitions. [2022-11-03 03:51:04,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:51:04,527 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 853 transitions. [2022-11-03 03:51:04,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 03:51:04,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:04,531 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:04,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:04,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:04,747 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:04,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:04,747 INFO L85 PathProgramCache]: Analyzing trace with hash 317284730, now seen corresponding path program 1 times [2022-11-03 03:51:04,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:04,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441340910] [2022-11-03 03:51:04,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:04,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:51:04,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:04,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441340910] [2022-11-03 03:51:04,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441340910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:51:04,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117812630] [2022-11-03 03:51:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:04,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:04,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:04,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:04,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:51:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:05,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:51:05,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:51:05,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:05,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117812630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:05,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:51:05,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:51:05,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094507273] [2022-11-03 03:51:05,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:05,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:05,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:05,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:05,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:51:05,229 INFO L87 Difference]: Start difference. First operand 570 states and 853 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:51:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:05,446 INFO L93 Difference]: Finished difference Result 1687 states and 2568 transitions. [2022-11-03 03:51:05,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:51:05,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 114 [2022-11-03 03:51:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:05,456 INFO L225 Difference]: With dead ends: 1687 [2022-11-03 03:51:05,458 INFO L226 Difference]: Without dead ends: 1122 [2022-11-03 03:51:05,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:51:05,464 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 198 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:05,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 416 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:05,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-11-03 03:51:05,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1116. [2022-11-03 03:51:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 919 states have (on average 1.4874863982589772) internal successors, (1367), 924 states have internal predecessors, (1367), 148 states have call successors, (148), 48 states have call predecessors, (148), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-03 03:51:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1663 transitions. [2022-11-03 03:51:05,555 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1663 transitions. Word has length 114 [2022-11-03 03:51:05,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:05,557 INFO L495 AbstractCegarLoop]: Abstraction has 1116 states and 1663 transitions. [2022-11-03 03:51:05,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:51:05,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1663 transitions. [2022-11-03 03:51:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 03:51:05,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:05,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:05,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:05,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:05,782 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:05,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:05,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1554571268, now seen corresponding path program 1 times [2022-11-03 03:51:05,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:05,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572064951] [2022-11-03 03:51:05,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:05,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:51:05,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:05,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572064951] [2022-11-03 03:51:05,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572064951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:51:05,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764520663] [2022-11-03 03:51:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:05,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:05,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:05,994 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:06,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:51:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:06,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:51:06,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:51:06,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:06,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764520663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:06,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:51:06,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:51:06,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640380970] [2022-11-03 03:51:06,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:06,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:06,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:06,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:06,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:51:06,251 INFO L87 Difference]: Start difference. First operand 1116 states and 1663 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:51:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:06,450 INFO L93 Difference]: Finished difference Result 3313 states and 5020 transitions. [2022-11-03 03:51:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:51:06,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 114 [2022-11-03 03:51:06,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:06,463 INFO L225 Difference]: With dead ends: 3313 [2022-11-03 03:51:06,464 INFO L226 Difference]: Without dead ends: 2202 [2022-11-03 03:51:06,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:51:06,469 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 204 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:06,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 415 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:06,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2022-11-03 03:51:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2192. [2022-11-03 03:51:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 1811 states have (on average 1.4815019326339038) internal successors, (2683), 1820 states have internal predecessors, (2683), 284 states have call successors, (284), 96 states have call predecessors, (284), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2022-11-03 03:51:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 3251 transitions. [2022-11-03 03:51:06,613 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 3251 transitions. Word has length 114 [2022-11-03 03:51:06,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:06,614 INFO L495 AbstractCegarLoop]: Abstraction has 2192 states and 3251 transitions. [2022-11-03 03:51:06,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:51:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 3251 transitions. [2022-11-03 03:51:06,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 03:51:06,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:06,620 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:06,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:06,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:06,847 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:06,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:06,847 INFO L85 PathProgramCache]: Analyzing trace with hash 719877374, now seen corresponding path program 1 times [2022-11-03 03:51:06,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:06,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842491453] [2022-11-03 03:51:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:06,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:51:06,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:06,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842491453] [2022-11-03 03:51:06,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842491453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:51:06,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234276194] [2022-11-03 03:51:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:06,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:06,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:06,988 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:06,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:51:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:07,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:51:07,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:51:07,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:07,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234276194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:07,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:51:07,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:51:07,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504872293] [2022-11-03 03:51:07,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:07,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:07,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:07,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:07,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:51:07,233 INFO L87 Difference]: Start difference. First operand 2192 states and 3251 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:51:07,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:07,534 INFO L93 Difference]: Finished difference Result 6517 states and 9824 transitions. [2022-11-03 03:51:07,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:51:07,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 114 [2022-11-03 03:51:07,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:07,556 INFO L225 Difference]: With dead ends: 6517 [2022-11-03 03:51:07,557 INFO L226 Difference]: Without dead ends: 4330 [2022-11-03 03:51:07,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:51:07,570 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 207 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:07,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 414 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:07,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4330 states. [2022-11-03 03:51:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4330 to 4312. [2022-11-03 03:51:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4312 states, 3571 states have (on average 1.4749369924390927) internal successors, (5267), 3588 states have internal predecessors, (5267), 548 states have call successors, (548), 192 states have call predecessors, (548), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2022-11-03 03:51:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4312 states to 4312 states and 6363 transitions. [2022-11-03 03:51:07,848 INFO L78 Accepts]: Start accepts. Automaton has 4312 states and 6363 transitions. Word has length 114 [2022-11-03 03:51:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:07,850 INFO L495 AbstractCegarLoop]: Abstraction has 4312 states and 6363 transitions. [2022-11-03 03:51:07,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:51:07,850 INFO L276 IsEmpty]: Start isEmpty. Operand 4312 states and 6363 transitions. [2022-11-03 03:51:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 03:51:07,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:07,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:07,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:08,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:08,095 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:08,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:08,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1415309500, now seen corresponding path program 1 times [2022-11-03 03:51:08,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:08,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411042172] [2022-11-03 03:51:08,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:08,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:51:08,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:08,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411042172] [2022-11-03 03:51:08,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411042172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:51:08,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099651020] [2022-11-03 03:51:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:08,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:08,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:08,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:08,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:51:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:08,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:51:08,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:51:08,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:08,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099651020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:08,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:51:08,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:51:08,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766181095] [2022-11-03 03:51:08,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:08,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:08,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:08,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:08,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:51:08,562 INFO L87 Difference]: Start difference. First operand 4312 states and 6363 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:51:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:08,969 INFO L93 Difference]: Finished difference Result 12829 states and 19232 transitions. [2022-11-03 03:51:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:51:08,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 114 [2022-11-03 03:51:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:09,047 INFO L225 Difference]: With dead ends: 12829 [2022-11-03 03:51:09,047 INFO L226 Difference]: Without dead ends: 8522 [2022-11-03 03:51:09,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:51:09,064 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 192 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:09,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 387 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8522 states. [2022-11-03 03:51:09,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8522 to 8488. [2022-11-03 03:51:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8488 states, 7043 states have (on average 1.4679823938662502) internal successors, (10339), 7076 states have internal predecessors, (10339), 1060 states have call successors, (1060), 384 states have call predecessors, (1060), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2022-11-03 03:51:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8488 states to 8488 states and 12459 transitions. [2022-11-03 03:51:09,547 INFO L78 Accepts]: Start accepts. Automaton has 8488 states and 12459 transitions. Word has length 114 [2022-11-03 03:51:09,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:09,549 INFO L495 AbstractCegarLoop]: Abstraction has 8488 states and 12459 transitions. [2022-11-03 03:51:09,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 03:51:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 8488 states and 12459 transitions. [2022-11-03 03:51:09,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 03:51:09,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:09,565 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:09,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 03:51:09,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 03:51:09,790 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:09,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:09,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1066610878, now seen corresponding path program 1 times [2022-11-03 03:51:09,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:09,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80743570] [2022-11-03 03:51:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:09,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:51:10,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:10,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80743570] [2022-11-03 03:51:10,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80743570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:10,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:10,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:51:10,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852814014] [2022-11-03 03:51:10,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:10,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:10,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:10,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:10,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:51:10,024 INFO L87 Difference]: Start difference. First operand 8488 states and 12459 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:51:10,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:10,648 INFO L93 Difference]: Finished difference Result 15082 states and 22508 transitions. [2022-11-03 03:51:10,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:51:10,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 114 [2022-11-03 03:51:10,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:10,705 INFO L225 Difference]: With dead ends: 15082 [2022-11-03 03:51:10,705 INFO L226 Difference]: Without dead ends: 10760 [2022-11-03 03:51:10,719 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 [2022-11-03 03:51:10,720 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 100 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:10,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 492 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10760 states. [2022-11-03 03:51:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10760 to 10072. [2022-11-03 03:51:11,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10072 states, 8563 states have (on average 1.5138386079644983) internal successors, (12963), 8596 states have internal predecessors, (12963), 1092 states have call successors, (1092), 416 states have call predecessors, (1092), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2022-11-03 03:51:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10072 states to 10072 states and 15147 transitions. [2022-11-03 03:51:11,354 INFO L78 Accepts]: Start accepts. Automaton has 10072 states and 15147 transitions. Word has length 114 [2022-11-03 03:51:11,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:11,355 INFO L495 AbstractCegarLoop]: Abstraction has 10072 states and 15147 transitions. [2022-11-03 03:51:11,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:51:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 10072 states and 15147 transitions. [2022-11-03 03:51:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 03:51:11,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:11,383 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:51:11,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:51:11,383 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:11,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1136926938, now seen corresponding path program 1 times [2022-11-03 03:51:11,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:11,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818706563] [2022-11-03 03:51:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:11,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 03:51:11,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:11,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818706563] [2022-11-03 03:51:11,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818706563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:11,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:11,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:51:11,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972899544] [2022-11-03 03:51:11,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:11,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:11,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:11,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:11,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:51:11,510 INFO L87 Difference]: Start difference. First operand 10072 states and 15147 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:51:12,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:12,628 INFO L93 Difference]: Finished difference Result 29917 states and 45520 transitions. [2022-11-03 03:51:12,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:51:12,629 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), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 155 [2022-11-03 03:51:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:12,705 INFO L225 Difference]: With dead ends: 29917 [2022-11-03 03:51:12,705 INFO L226 Difference]: Without dead ends: 19850 [2022-11-03 03:51:12,732 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 [2022-11-03 03:51:12,733 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 194 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:12,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 389 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:12,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19850 states. [2022-11-03 03:51:13,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19850 to 19752. [2022-11-03 03:51:13,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19752 states, 16803 states have (on average 1.5046717848003333) internal successors, (25283), 16868 states have internal predecessors, (25283), 2116 states have call successors, (2116), 832 states have call predecessors, (2116), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2022-11-03 03:51:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19752 states to 19752 states and 29515 transitions. [2022-11-03 03:51:13,769 INFO L78 Accepts]: Start accepts. Automaton has 19752 states and 29515 transitions. Word has length 155 [2022-11-03 03:51:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:13,770 INFO L495 AbstractCegarLoop]: Abstraction has 19752 states and 29515 transitions. [2022-11-03 03:51:13,770 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), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:51:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 19752 states and 29515 transitions. [2022-11-03 03:51:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 03:51:13,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:13,830 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:51:13,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:51:13,830 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:13,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2018935073, now seen corresponding path program 1 times [2022-11-03 03:51:13,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:13,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825810521] [2022-11-03 03:51:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:13,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 03:51:13,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:13,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825810521] [2022-11-03 03:51:13,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825810521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:13,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:13,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:51:13,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095475450] [2022-11-03 03:51:13,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:13,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:13,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:13,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:13,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:51:13,957 INFO L87 Difference]: Start difference. First operand 19752 states and 29515 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:51:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:15,901 INFO L93 Difference]: Finished difference Result 58669 states and 88656 transitions. [2022-11-03 03:51:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:51:15,902 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), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 155 [2022-11-03 03:51:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:16,181 INFO L225 Difference]: With dead ends: 58669 [2022-11-03 03:51:16,182 INFO L226 Difference]: Without dead ends: 38922 [2022-11-03 03:51:16,234 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 [2022-11-03 03:51:16,235 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 196 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:16,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 389 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38922 states. [2022-11-03 03:51:17,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38922 to 38728. [2022-11-03 03:51:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38728 states, 32963 states have (on average 1.4951005673027333) internal successors, (49283), 33092 states have internal predecessors, (49283), 4100 states have call successors, (4100), 1664 states have call predecessors, (4100), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2022-11-03 03:51:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38728 states to 38728 states and 57483 transitions. [2022-11-03 03:51:18,168 INFO L78 Accepts]: Start accepts. Automaton has 38728 states and 57483 transitions. Word has length 155 [2022-11-03 03:51:18,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:18,169 INFO L495 AbstractCegarLoop]: Abstraction has 38728 states and 57483 transitions. [2022-11-03 03:51:18,169 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), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:51:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 38728 states and 57483 transitions. [2022-11-03 03:51:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 03:51:18,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:18,268 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:51:18,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:51:18,269 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:18,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:18,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1088131957, now seen corresponding path program 1 times [2022-11-03 03:51:18,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:18,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552706031] [2022-11-03 03:51:18,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:18,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 03:51:18,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:18,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552706031] [2022-11-03 03:51:18,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552706031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:18,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:18,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:51:18,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549949662] [2022-11-03 03:51:18,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:18,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:18,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:18,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:18,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:51:18,379 INFO L87 Difference]: Start difference. First operand 38728 states and 57483 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:51:22,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:22,305 INFO L93 Difference]: Finished difference Result 115021 states and 172560 transitions. [2022-11-03 03:51:22,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:51:22,305 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), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 155 [2022-11-03 03:51:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:22,856 INFO L225 Difference]: With dead ends: 115021 [2022-11-03 03:51:22,856 INFO L226 Difference]: Without dead ends: 76298 [2022-11-03 03:51:22,959 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 [2022-11-03 03:51:22,960 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 198 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:22,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 389 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76298 states. [2022-11-03 03:51:26,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76298 to 75912. [2022-11-03 03:51:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75912 states, 64643 states have (on average 1.4851259997215476) internal successors, (96003), 64900 states have internal predecessors, (96003), 7940 states have call successors, (7940), 3328 states have call predecessors, (7940), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2022-11-03 03:51:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75912 states to 75912 states and 111883 transitions. [2022-11-03 03:51:26,642 INFO L78 Accepts]: Start accepts. Automaton has 75912 states and 111883 transitions. Word has length 155 [2022-11-03 03:51:26,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:26,642 INFO L495 AbstractCegarLoop]: Abstraction has 75912 states and 111883 transitions. [2022-11-03 03:51:26,643 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), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:51:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand 75912 states and 111883 transitions. [2022-11-03 03:51:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 03:51:26,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:26,813 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 03:51:26,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:51:26,814 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:26,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:26,814 INFO L85 PathProgramCache]: Analyzing trace with hash 878401491, now seen corresponding path program 1 times [2022-11-03 03:51:26,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:26,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496356038] [2022-11-03 03:51:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:26,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 03:51:27,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:27,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496356038] [2022-11-03 03:51:27,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496356038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:27,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:27,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:51:27,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700263718] [2022-11-03 03:51:27,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:27,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:27,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:27,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:27,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:51:27,271 INFO L87 Difference]: Start difference. First operand 75912 states and 111883 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:51:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:32,788 INFO L93 Difference]: Finished difference Result 225421 states and 335632 transitions. [2022-11-03 03:51:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:51:32,790 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), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 155 [2022-11-03 03:51:32,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:33,452 INFO L225 Difference]: With dead ends: 225421 [2022-11-03 03:51:33,453 INFO L226 Difference]: Without dead ends: 149514 [2022-11-03 03:51:33,717 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 [2022-11-03 03:51:33,718 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 201 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:33,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 397 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:34,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149514 states. [2022-11-03 03:51:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149514 to 148744. [2022-11-03 03:51:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148744 states, 126723 states have (on average 1.4747362357267426) internal successors, (186883), 127236 states have internal predecessors, (186883), 15364 states have call successors, (15364), 6656 states have call predecessors, (15364), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2022-11-03 03:51:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148744 states to 148744 states and 217611 transitions. [2022-11-03 03:51:41,114 INFO L78 Accepts]: Start accepts. Automaton has 148744 states and 217611 transitions. Word has length 155 [2022-11-03 03:51:41,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:41,115 INFO L495 AbstractCegarLoop]: Abstraction has 148744 states and 217611 transitions. [2022-11-03 03:51:41,116 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), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:51:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 148744 states and 217611 transitions. [2022-11-03 03:51:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-03 03:51:41,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:41,586 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:41,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:51:41,586 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:41,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:41,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1728777564, now seen corresponding path program 1 times [2022-11-03 03:51:41,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:41,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677377489] [2022-11-03 03:51:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:41,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 63 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:51:42,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:42,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677377489] [2022-11-03 03:51:42,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677377489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:51:42,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047935688] [2022-11-03 03:51:42,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:42,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:42,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:42,347 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:42,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5248c3-840a-46b8-95ca-755a5b2f614d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:51:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:42,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:51:42,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:51:42,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:42,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047935688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:42,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:51:42,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 03:51:42,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421712281] [2022-11-03 03:51:42,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:42,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:42,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:42,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:42,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:51:42,659 INFO L87 Difference]: Start difference. First operand 148744 states and 217611 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)