./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh --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 d4710f8f3a918a0191222414f5c33a367ff98c09c2e8598fa3213223c4c35dba --- 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-2329fc7 [2022-12-14 13:29:21,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:29:21,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:29:21,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:29:21,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:29:21,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:29:21,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:29:21,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:29:21,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:29:21,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:29:21,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:29:21,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:29:21,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:29:21,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:29:21,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:29:21,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:29:21,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:29:21,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:29:21,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:29:21,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:29:21,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:29:21,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:29:21,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:29:21,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:29:21,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:29:21,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:29:21,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:29:21,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:29:21,699 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:29:21,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:29:21,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:29:21,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:29:21,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:29:21,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:29:21,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:29:21,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:29:21,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:29:21,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:29:21,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:29:21,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:29:21,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:29:21,704 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:29:21,718 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:29:21,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:29:21,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:29:21,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:29:21,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:29:21,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:29:21,719 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:29:21,719 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:29:21,719 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:29:21,719 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:29:21,719 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:29:21,724 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:29:21,724 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:29:21,725 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:29:21,725 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:29:21,725 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:29:21,725 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:29:21,725 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:29:21,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:29:21,726 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:29:21,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:29:21,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:29:21,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:29:21,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:29:21,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:29:21,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:29:21,727 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:29:21,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:29:21,727 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:29:21,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:29:21,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:29:21,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:29:21,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:29:21,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:29:21,728 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:29:21,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:29:21,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:29:21,728 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:29:21,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:29:21,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:29:21,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:29:21,728 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_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4710f8f3a918a0191222414f5c33a367ff98c09c2e8598fa3213223c4c35dba [2022-12-14 13:29:21,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:29:21,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:29:21,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:29:21,908 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:29:21,908 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:29:21,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2022-12-14 13:29:24,499 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:29:24,655 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:29:24,656 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2022-12-14 13:29:24,665 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/data/086fbc990/42003575216b490285e8a92e10adb135/FLAG95d4d1135 [2022-12-14 13:29:24,677 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/data/086fbc990/42003575216b490285e8a92e10adb135 [2022-12-14 13:29:24,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:29:24,681 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:29:24,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:29:24,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:29:24,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:29:24,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:29:24" (1/1) ... [2022-12-14 13:29:24,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@615c7840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:29:24, skipping insertion in model container [2022-12-14 13:29:24,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:29:24" (1/1) ... [2022-12-14 13:29:24,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:29:24,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:29:24,837 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/sv-benchmarks/c/systemc/token_ring.04.cil-1.c[671,684] [2022-12-14 13:29:24,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:29:24,911 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:29:24,920 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/sv-benchmarks/c/systemc/token_ring.04.cil-1.c[671,684] [2022-12-14 13:29:24,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:29:24,972 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:29:24,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:29:24 WrapperNode [2022-12-14 13:29:24,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:29:24,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:29:24,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:29:24,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:29:24,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:29:24" (1/1) ... [2022-12-14 13:29:24,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:29:24" (1/1) ... [2022-12-14 13:29:25,012 INFO L138 Inliner]: procedures = 36, calls = 43, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 389 [2022-12-14 13:29:25,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:29:25,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:29:25,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:29:25,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:29:25,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:29:24" (1/1) ... [2022-12-14 13:29:25,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:29:24" (1/1) ... [2022-12-14 13:29:25,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:29:24" (1/1) ... [2022-12-14 13:29:25,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:29:24" (1/1) ... [2022-12-14 13:29:25,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:29:24" (1/1) ... [2022-12-14 13:29:25,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:29:24" (1/1) ... [2022-12-14 13:29:25,039 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:29:24" (1/1) ... [2022-12-14 13:29:25,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:29:24" (1/1) ... [2022-12-14 13:29:25,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:29:25,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:29:25,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:29:25,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:29:25,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:29:24" (1/1) ... [2022-12-14 13:29:25,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:29:25,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:25,073 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:29:25,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:29:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:29:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 13:29:25,107 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 13:29:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 13:29:25,108 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 13:29:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 13:29:25,108 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 13:29:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 13:29:25,108 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 13:29:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 13:29:25,108 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 13:29:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:29:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 13:29:25,109 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 13:29:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:29:25,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:29:25,181 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:29:25,183 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:29:25,549 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:29:25,668 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:29:25,668 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-12-14 13:29:25,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:29:25 BoogieIcfgContainer [2022-12-14 13:29:25,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:29:25,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:29:25,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:29:25,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:29:25,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:29:24" (1/3) ... [2022-12-14 13:29:25,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e51cb4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:29:25, skipping insertion in model container [2022-12-14 13:29:25,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:29:24" (2/3) ... [2022-12-14 13:29:25,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e51cb4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:29:25, skipping insertion in model container [2022-12-14 13:29:25,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:29:25" (3/3) ... [2022-12-14 13:29:25,676 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-1.c [2022-12-14 13:29:25,689 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:29:25,690 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:29:25,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:29:25,730 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;@2d4c7127, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:29:25,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:29:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 74 states have (on average 1.5135135135135136) internal successors, (112), 76 states have internal predecessors, (112), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 13:29:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 13:29:25,740 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:25,741 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] [2022-12-14 13:29:25,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:25,745 INFO L85 PathProgramCache]: Analyzing trace with hash 98806216, now seen corresponding path program 1 times [2022-12-14 13:29:25,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:25,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122871482] [2022-12-14 13:29:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:25,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:25,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:25,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122871482] [2022-12-14 13:29:25,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122871482] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:25,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:29:25,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:29:25,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339662869] [2022-12-14 13:29:25,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:25,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:29:25,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:26,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:29:26,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:29:26,016 INFO L87 Difference]: Start difference. First operand has 100 states, 74 states have (on average 1.5135135135135136) internal successors, (112), 76 states have internal predecessors, (112), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-12-14 13:29:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:26,248 INFO L93 Difference]: Finished difference Result 284 states and 428 transitions. [2022-12-14 13:29:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:29:26,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 42 [2022-12-14 13:29:26,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:26,258 INFO L225 Difference]: With dead ends: 284 [2022-12-14 13:29:26,258 INFO L226 Difference]: Without dead ends: 185 [2022-12-14 13:29:26,261 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 [2022-12-14 13:29:26,264 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 248 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:26,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 362 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:29:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-12-14 13:29:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-12-14 13:29:26,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 139 states have (on average 1.4388489208633093) internal successors, (200), 141 states have internal predecessors, (200), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-12-14 13:29:26,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 264 transitions. [2022-12-14 13:29:26,318 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 264 transitions. Word has length 42 [2022-12-14 13:29:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:26,319 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 264 transitions. [2022-12-14 13:29:26,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-12-14 13:29:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 264 transitions. [2022-12-14 13:29:26,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 13:29:26,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:26,323 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:26,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:29:26,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:26,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:26,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1276212129, now seen corresponding path program 1 times [2022-12-14 13:29:26,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:26,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576020232] [2022-12-14 13:29:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:26,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:29:26,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:26,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576020232] [2022-12-14 13:29:26,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576020232] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:26,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091926184] [2022-12-14 13:29:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:26,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:26,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:26,485 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:26,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:29:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:26,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:29:26,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:29:26,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:26,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091926184] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:26,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:26,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 13:29:26,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051712330] [2022-12-14 13:29:26,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:26,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:29:26,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:26,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:29:26,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:29:26,646 INFO L87 Difference]: Start difference. First operand 184 states and 264 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 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) [2022-12-14 13:29:26,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:26,726 INFO L93 Difference]: Finished difference Result 535 states and 779 transitions. [2022-12-14 13:29:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:29:26,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 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 79 [2022-12-14 13:29:26,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:26,731 INFO L225 Difference]: With dead ends: 535 [2022-12-14 13:29:26,731 INFO L226 Difference]: Without dead ends: 356 [2022-12-14 13:29:26,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:29:26,734 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 115 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:26,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 258 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:29:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-12-14 13:29:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2022-12-14 13:29:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 269 states have (on average 1.4312267657992566) internal successors, (385), 272 states have internal predecessors, (385), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2022-12-14 13:29:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 501 transitions. [2022-12-14 13:29:26,773 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 501 transitions. Word has length 79 [2022-12-14 13:29:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:26,773 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 501 transitions. [2022-12-14 13:29:26,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 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) [2022-12-14 13:29:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 501 transitions. [2022-12-14 13:29:26,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 13:29:26,776 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:26,777 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:26,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:29:26,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:26,978 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:26,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:26,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1992177601, now seen corresponding path program 1 times [2022-12-14 13:29:26,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:26,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685058790] [2022-12-14 13:29:26,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:26,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:29:27,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:27,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685058790] [2022-12-14 13:29:27,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685058790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:27,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099912557] [2022-12-14 13:29:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:27,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:27,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:27,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:27,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:29:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:27,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:29:27,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 13:29:27,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:27,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099912557] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:27,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:27,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 13:29:27,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021649973] [2022-12-14 13:29:27,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:27,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:29:27,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:27,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:29:27,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:29:27,256 INFO L87 Difference]: Start difference. First operand 352 states and 501 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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) [2022-12-14 13:29:27,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:27,355 INFO L93 Difference]: Finished difference Result 1033 states and 1492 transitions. [2022-12-14 13:29:27,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:29:27,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 79 [2022-12-14 13:29:27,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:27,360 INFO L225 Difference]: With dead ends: 1033 [2022-12-14 13:29:27,360 INFO L226 Difference]: Without dead ends: 686 [2022-12-14 13:29:27,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:29:27,363 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 118 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:27,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 257 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:29:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-12-14 13:29:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 680. [2022-12-14 13:29:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 523 states have (on average 1.4206500956022945) internal successors, (743), 528 states have internal predecessors, (743), 108 states have call successors, (108), 48 states have call predecessors, (108), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-12-14 13:29:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 959 transitions. [2022-12-14 13:29:27,415 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 959 transitions. Word has length 79 [2022-12-14 13:29:27,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:27,416 INFO L495 AbstractCegarLoop]: Abstraction has 680 states and 959 transitions. [2022-12-14 13:29:27,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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) [2022-12-14 13:29:27,416 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 959 transitions. [2022-12-14 13:29:27,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 13:29:27,419 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:27,419 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:27,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:29:27,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:27,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:27,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1783005279, now seen corresponding path program 1 times [2022-12-14 13:29:27,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:27,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092234981] [2022-12-14 13:29:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:27,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 13:29:28,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:28,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092234981] [2022-12-14 13:29:28,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092234981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:28,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:29:28,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:29:28,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475582658] [2022-12-14 13:29:28,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:28,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:29:28,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:28,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:29:28,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:29:28,059 INFO L87 Difference]: Start difference. First operand 680 states and 959 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 13:29:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:28,370 INFO L93 Difference]: Finished difference Result 2204 states and 3122 transitions. [2022-12-14 13:29:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:29:28,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 79 [2022-12-14 13:29:28,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:28,379 INFO L225 Difference]: With dead ends: 2204 [2022-12-14 13:29:28,379 INFO L226 Difference]: Without dead ends: 1530 [2022-12-14 13:29:28,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:29:28,381 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 406 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:28,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 398 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:29:28,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-12-14 13:29:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1304. [2022-12-14 13:29:28,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1003 states have (on average 1.4067796610169492) internal successors, (1411), 1012 states have internal predecessors, (1411), 204 states have call successors, (204), 96 states have call predecessors, (204), 96 states have return successors, (204), 196 states have call predecessors, (204), 204 states have call successors, (204) [2022-12-14 13:29:28,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1819 transitions. [2022-12-14 13:29:28,441 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1819 transitions. Word has length 79 [2022-12-14 13:29:28,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:28,442 INFO L495 AbstractCegarLoop]: Abstraction has 1304 states and 1819 transitions. [2022-12-14 13:29:28,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 13:29:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1819 transitions. [2022-12-14 13:29:28,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 13:29:28,444 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:28,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:28,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:29:28,445 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:28,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1349612051, now seen corresponding path program 1 times [2022-12-14 13:29:28,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:28,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548485524] [2022-12-14 13:29:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:28,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 13:29:28,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:28,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548485524] [2022-12-14 13:29:28,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548485524] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:28,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:29:28,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:29:28,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019514063] [2022-12-14 13:29:28,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:28,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:29:28,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:28,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:29:28,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:29:28,498 INFO L87 Difference]: Start difference. First operand 1304 states and 1819 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-12-14 13:29:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:28,621 INFO L93 Difference]: Finished difference Result 2302 states and 3256 transitions. [2022-12-14 13:29:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:29:28,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 80 [2022-12-14 13:29:28,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:28,633 INFO L225 Difference]: With dead ends: 2302 [2022-12-14 13:29:28,633 INFO L226 Difference]: Without dead ends: 1636 [2022-12-14 13:29:28,635 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 [2022-12-14 13:29:28,635 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 55 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:28,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 295 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:28,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2022-12-14 13:29:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1496. [2022-12-14 13:29:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1179 states have (on average 1.4410517387616624) internal successors, (1699), 1188 states have internal predecessors, (1699), 212 states have call successors, (212), 104 states have call predecessors, (212), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2022-12-14 13:29:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2123 transitions. [2022-12-14 13:29:28,703 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2123 transitions. Word has length 80 [2022-12-14 13:29:28,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:28,704 INFO L495 AbstractCegarLoop]: Abstraction has 1496 states and 2123 transitions. [2022-12-14 13:29:28,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-12-14 13:29:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2123 transitions. [2022-12-14 13:29:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-14 13:29:28,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:28,707 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, 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] [2022-12-14 13:29:28,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:29:28,708 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash -408457429, now seen corresponding path program 1 times [2022-12-14 13:29:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:28,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971821081] [2022-12-14 13:29:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 13:29:28,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:28,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971821081] [2022-12-14 13:29:28,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971821081] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:28,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370793897] [2022-12-14 13:29:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:28,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:28,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:28,867 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:28,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:29:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:28,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:29:28,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 13:29:29,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:29,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370793897] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:29,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:29,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 13:29:29,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924173559] [2022-12-14 13:29:29,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:29,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:29:29,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:29,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:29:29,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:29,075 INFO L87 Difference]: Start difference. First operand 1496 states and 2123 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:29:29,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:29,255 INFO L93 Difference]: Finished difference Result 4429 states and 6360 transitions. [2022-12-14 13:29:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:29:29,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 119 [2022-12-14 13:29:29,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:29,264 INFO L225 Difference]: With dead ends: 4429 [2022-12-14 13:29:29,264 INFO L226 Difference]: Without dead ends: 2938 [2022-12-14 13:29:29,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:29,268 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 75 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:29,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 234 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2022-12-14 13:29:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2912. [2022-12-14 13:29:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2299 states have (on average 1.4280121792083516) internal successors, (3283), 2316 states have internal predecessors, (3283), 404 states have call successors, (404), 208 states have call predecessors, (404), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2022-12-14 13:29:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 4091 transitions. [2022-12-14 13:29:29,416 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 4091 transitions. Word has length 119 [2022-12-14 13:29:29,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:29,417 INFO L495 AbstractCegarLoop]: Abstraction has 2912 states and 4091 transitions. [2022-12-14 13:29:29,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:29:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 4091 transitions. [2022-12-14 13:29:29,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 13:29:29,425 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:29,425 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 13:29:29,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:29:29,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:29,626 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:29,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1679096138, now seen corresponding path program 1 times [2022-12-14 13:29:29,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:29,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330389318] [2022-12-14 13:29:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:29,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 13:29:29,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:29,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330389318] [2022-12-14 13:29:29,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330389318] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:29,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:29:29,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:29:29,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055772894] [2022-12-14 13:29:29,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:29,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:29:29,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:29,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:29:29,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:29:29,707 INFO L87 Difference]: Start difference. First operand 2912 states and 4091 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2022-12-14 13:29:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:29,920 INFO L93 Difference]: Finished difference Result 7265 states and 10272 transitions. [2022-12-14 13:29:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:29:29,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 105 [2022-12-14 13:29:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:29,934 INFO L225 Difference]: With dead ends: 7265 [2022-12-14 13:29:29,934 INFO L226 Difference]: Without dead ends: 4358 [2022-12-14 13:29:29,940 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 [2022-12-14 13:29:29,940 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 111 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:29,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 257 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:29,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2022-12-14 13:29:30,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 4332. [2022-12-14 13:29:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4332 states, 3423 states have (on average 1.4148407829389424) internal successors, (4843), 3448 states have internal predecessors, (4843), 596 states have call successors, (596), 312 states have call predecessors, (596), 312 states have return successors, (596), 572 states have call predecessors, (596), 596 states have call successors, (596) [2022-12-14 13:29:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4332 states to 4332 states and 6035 transitions. [2022-12-14 13:29:30,122 INFO L78 Accepts]: Start accepts. Automaton has 4332 states and 6035 transitions. Word has length 105 [2022-12-14 13:29:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:30,123 INFO L495 AbstractCegarLoop]: Abstraction has 4332 states and 6035 transitions. [2022-12-14 13:29:30,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2022-12-14 13:29:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4332 states and 6035 transitions. [2022-12-14 13:29:30,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 13:29:30,137 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:30,137 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, 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] [2022-12-14 13:29:30,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:29:30,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:30,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:30,138 INFO L85 PathProgramCache]: Analyzing trace with hash 546863016, now seen corresponding path program 1 times [2022-12-14 13:29:30,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:30,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10742556] [2022-12-14 13:29:30,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:30,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 13:29:30,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:30,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10742556] [2022-12-14 13:29:30,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10742556] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:30,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429002067] [2022-12-14 13:29:30,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:30,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:30,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:30,212 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:30,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:29:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:30,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:29:30,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:29:30,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:30,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429002067] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:30,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:30,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:29:30,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887906469] [2022-12-14 13:29:30,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:30,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:29:30,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:30,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:29:30,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:29:30,349 INFO L87 Difference]: Start difference. First operand 4332 states and 6035 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-12-14 13:29:30,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:30,642 INFO L93 Difference]: Finished difference Result 8136 states and 11465 transitions. [2022-12-14 13:29:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:29:30,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) Word has length 122 [2022-12-14 13:29:30,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:30,659 INFO L225 Difference]: With dead ends: 8136 [2022-12-14 13:29:30,659 INFO L226 Difference]: Without dead ends: 5918 [2022-12-14 13:29:30,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:29:30,665 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 81 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:30,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 317 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:29:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5918 states. [2022-12-14 13:29:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5918 to 5076. [2022-12-14 13:29:30,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5076 states, 4095 states have (on average 1.4434676434676434) internal successors, (5911), 4120 states have internal predecessors, (5911), 632 states have call successors, (632), 348 states have call predecessors, (632), 348 states have return successors, (632), 608 states have call predecessors, (632), 632 states have call successors, (632) [2022-12-14 13:29:30,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 7175 transitions. [2022-12-14 13:29:30,912 INFO L78 Accepts]: Start accepts. Automaton has 5076 states and 7175 transitions. Word has length 122 [2022-12-14 13:29:30,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:30,912 INFO L495 AbstractCegarLoop]: Abstraction has 5076 states and 7175 transitions. [2022-12-14 13:29:30,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-12-14 13:29:30,912 INFO L276 IsEmpty]: Start isEmpty. Operand 5076 states and 7175 transitions. [2022-12-14 13:29:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 13:29:30,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:30,928 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, 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] [2022-12-14 13:29:30,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:29:31,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 13:29:31,128 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:31,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:31,129 INFO L85 PathProgramCache]: Analyzing trace with hash -249449222, now seen corresponding path program 2 times [2022-12-14 13:29:31,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:31,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114788268] [2022-12-14 13:29:31,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:31,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 13:29:31,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:31,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114788268] [2022-12-14 13:29:31,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114788268] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:31,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902354246] [2022-12-14 13:29:31,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:29:31,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:31,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:31,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:31,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:29:31,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:29:31,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:29:31,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:29:31,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 13:29:31,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:31,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902354246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:31,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:31,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:29:31,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384898027] [2022-12-14 13:29:31,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:31,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:29:31,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:31,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:29:31,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:31,396 INFO L87 Difference]: Start difference. First operand 5076 states and 7175 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:29:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:31,747 INFO L93 Difference]: Finished difference Result 8064 states and 11613 transitions. [2022-12-14 13:29:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:29:31,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 122 [2022-12-14 13:29:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:31,761 INFO L225 Difference]: With dead ends: 8064 [2022-12-14 13:29:31,761 INFO L226 Difference]: Without dead ends: 5102 [2022-12-14 13:29:31,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:31,767 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 112 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:31,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 324 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:29:31,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5102 states. [2022-12-14 13:29:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5102 to 5052. [2022-12-14 13:29:31,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 4071 states have (on average 1.4225006140997298) internal successors, (5791), 4096 states have internal predecessors, (5791), 632 states have call successors, (632), 348 states have call predecessors, (632), 348 states have return successors, (632), 608 states have call predecessors, (632), 632 states have call successors, (632) [2022-12-14 13:29:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 7055 transitions. [2022-12-14 13:29:31,981 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 7055 transitions. Word has length 122 [2022-12-14 13:29:31,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:31,981 INFO L495 AbstractCegarLoop]: Abstraction has 5052 states and 7055 transitions. [2022-12-14 13:29:31,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:29:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 7055 transitions. [2022-12-14 13:29:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 13:29:31,992 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:31,992 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:31,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:29:32,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:32,193 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:32,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:32,193 INFO L85 PathProgramCache]: Analyzing trace with hash 819554044, now seen corresponding path program 1 times [2022-12-14 13:29:32,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:32,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301280853] [2022-12-14 13:29:32,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:32,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 13:29:32,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:32,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301280853] [2022-12-14 13:29:32,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301280853] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:32,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515717789] [2022-12-14 13:29:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:32,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:32,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:32,330 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:32,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:29:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:32,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:29:32,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 13:29:32,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:32,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515717789] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:32,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:32,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:29:32,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254120680] [2022-12-14 13:29:32,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:32,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:29:32,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:32,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:29:32,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:32,472 INFO L87 Difference]: Start difference. First operand 5052 states and 7055 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2022-12-14 13:29:32,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:32,681 INFO L93 Difference]: Finished difference Result 8456 states and 12033 transitions. [2022-12-14 13:29:32,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:29:32,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) Word has length 122 [2022-12-14 13:29:32,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:32,704 INFO L225 Difference]: With dead ends: 8456 [2022-12-14 13:29:32,704 INFO L226 Difference]: Without dead ends: 5070 [2022-12-14 13:29:32,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:32,712 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 106 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:32,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 302 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:32,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5070 states. [2022-12-14 13:29:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5070 to 5012. [2022-12-14 13:29:32,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5012 states, 4031 states have (on average 1.4008930786405358) internal successors, (5647), 4056 states have internal predecessors, (5647), 632 states have call successors, (632), 348 states have call predecessors, (632), 348 states have return successors, (632), 608 states have call predecessors, (632), 632 states have call successors, (632) [2022-12-14 13:29:32,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 6911 transitions. [2022-12-14 13:29:32,987 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 6911 transitions. Word has length 122 [2022-12-14 13:29:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:32,987 INFO L495 AbstractCegarLoop]: Abstraction has 5012 states and 6911 transitions. [2022-12-14 13:29:32,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2022-12-14 13:29:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 6911 transitions. [2022-12-14 13:29:32,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 13:29:32,999 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:32,999 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:33,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:29:33,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:33,200 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:33,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:33,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1472407750, now seen corresponding path program 1 times [2022-12-14 13:29:33,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:33,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177489104] [2022-12-14 13:29:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:33,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 13:29:33,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:33,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177489104] [2022-12-14 13:29:33,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177489104] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:33,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866085024] [2022-12-14 13:29:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:33,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:33,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:33,361 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:33,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:29:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:33,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:29:33,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 13:29:33,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:33,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866085024] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:33,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:33,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:29:33,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408003177] [2022-12-14 13:29:33,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:33,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:29:33,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:33,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:29:33,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:33,490 INFO L87 Difference]: Start difference. First operand 5012 states and 6911 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:29:33,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:33,758 INFO L93 Difference]: Finished difference Result 9414 states and 12902 transitions. [2022-12-14 13:29:33,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:29:33,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 122 [2022-12-14 13:29:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:33,773 INFO L225 Difference]: With dead ends: 9414 [2022-12-14 13:29:33,773 INFO L226 Difference]: Without dead ends: 6088 [2022-12-14 13:29:33,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:33,780 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 117 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:33,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 160 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6088 states. [2022-12-14 13:29:34,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6088 to 6088. [2022-12-14 13:29:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6088 states, 4971 states have (on average 1.3588815127740896) internal successors, (6755), 4996 states have internal predecessors, (6755), 676 states have call successors, (676), 440 states have call predecessors, (676), 440 states have return successors, (676), 652 states have call predecessors, (676), 676 states have call successors, (676) [2022-12-14 13:29:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6088 states to 6088 states and 8107 transitions. [2022-12-14 13:29:34,018 INFO L78 Accepts]: Start accepts. Automaton has 6088 states and 8107 transitions. Word has length 122 [2022-12-14 13:29:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:34,018 INFO L495 AbstractCegarLoop]: Abstraction has 6088 states and 8107 transitions. [2022-12-14 13:29:34,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:29:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 6088 states and 8107 transitions. [2022-12-14 13:29:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 13:29:34,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:34,027 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:34,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:29:34,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:34,228 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:34,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:34,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1235609105, now seen corresponding path program 1 times [2022-12-14 13:29:34,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:34,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889702351] [2022-12-14 13:29:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:34,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 13:29:34,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:34,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889702351] [2022-12-14 13:29:34,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889702351] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:34,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243044406] [2022-12-14 13:29:34,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:34,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:34,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:34,351 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:34,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:29:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:34,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 13:29:34,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:29:34,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:34,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243044406] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:34,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:34,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 13:29:34,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923538501] [2022-12-14 13:29:34,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:34,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:29:34,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:34,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:29:34,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:29:34,520 INFO L87 Difference]: Start difference. First operand 6088 states and 8107 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:29:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:34,927 INFO L93 Difference]: Finished difference Result 8932 states and 11893 transitions. [2022-12-14 13:29:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:29:34,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 123 [2022-12-14 13:29:34,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:34,947 INFO L225 Difference]: With dead ends: 8932 [2022-12-14 13:29:34,948 INFO L226 Difference]: Without dead ends: 6621 [2022-12-14 13:29:34,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:29:34,955 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 127 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:34,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 479 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:29:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6621 states. [2022-12-14 13:29:35,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6621 to 6365. [2022-12-14 13:29:35,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6365 states, 5203 states have (on average 1.3509513742071881) internal successors, (7029), 5244 states have internal predecessors, (7029), 684 states have call successors, (684), 445 states have call predecessors, (684), 477 states have return successors, (716), 676 states have call predecessors, (716), 684 states have call successors, (716) [2022-12-14 13:29:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6365 states to 6365 states and 8429 transitions. [2022-12-14 13:29:35,378 INFO L78 Accepts]: Start accepts. Automaton has 6365 states and 8429 transitions. Word has length 123 [2022-12-14 13:29:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:35,378 INFO L495 AbstractCegarLoop]: Abstraction has 6365 states and 8429 transitions. [2022-12-14 13:29:35,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:29:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 6365 states and 8429 transitions. [2022-12-14 13:29:35,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 13:29:35,390 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:35,391 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:35,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:29:35,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 13:29:35,591 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:35,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1569408802, now seen corresponding path program 1 times [2022-12-14 13:29:35,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:35,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629377672] [2022-12-14 13:29:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:35,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 13:29:35,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:35,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629377672] [2022-12-14 13:29:35,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629377672] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:35,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099728121] [2022-12-14 13:29:35,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:35,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:35,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:35,751 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:35,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:29:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:35,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:29:35,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:29:35,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:35,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099728121] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:35,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:35,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:29:35,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403372657] [2022-12-14 13:29:35,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:35,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:29:35,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:35,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:29:35,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:35,881 INFO L87 Difference]: Start difference. First operand 6365 states and 8429 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:29:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:36,141 INFO L93 Difference]: Finished difference Result 8760 states and 11723 transitions. [2022-12-14 13:29:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:29:36,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2022-12-14 13:29:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:36,152 INFO L225 Difference]: With dead ends: 8760 [2022-12-14 13:29:36,152 INFO L226 Difference]: Without dead ends: 6085 [2022-12-14 13:29:36,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:36,157 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 28 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:36,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 245 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:36,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2022-12-14 13:29:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 5661. [2022-12-14 13:29:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5661 states, 4595 states have (on average 1.364309031556039) internal successors, (6269), 4612 states have internal predecessors, (6269), 652 states have call successors, (652), 413 states have call predecessors, (652), 413 states have return successors, (652), 636 states have call predecessors, (652), 652 states have call successors, (652) [2022-12-14 13:29:36,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5661 states to 5661 states and 7573 transitions. [2022-12-14 13:29:36,371 INFO L78 Accepts]: Start accepts. Automaton has 5661 states and 7573 transitions. Word has length 124 [2022-12-14 13:29:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:36,372 INFO L495 AbstractCegarLoop]: Abstraction has 5661 states and 7573 transitions. [2022-12-14 13:29:36,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:29:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 5661 states and 7573 transitions. [2022-12-14 13:29:36,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 13:29:36,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:36,381 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:36,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:29:36,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 13:29:36,582 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:36,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:36,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1655231088, now seen corresponding path program 1 times [2022-12-14 13:29:36,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:36,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265197724] [2022-12-14 13:29:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:36,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 13:29:36,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:36,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265197724] [2022-12-14 13:29:36,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265197724] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:36,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090376530] [2022-12-14 13:29:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:36,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:36,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:36,704 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:36,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:29:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:36,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:29:36,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:29:36,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:36,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090376530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:36,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:36,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:29:36,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892885249] [2022-12-14 13:29:36,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:36,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:29:36,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:36,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:29:36,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:36,828 INFO L87 Difference]: Start difference. First operand 5661 states and 7573 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:29:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:37,158 INFO L93 Difference]: Finished difference Result 13643 states and 18526 transitions. [2022-12-14 13:29:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:29:37,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2022-12-14 13:29:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:37,174 INFO L225 Difference]: With dead ends: 13643 [2022-12-14 13:29:37,174 INFO L226 Difference]: Without dead ends: 8033 [2022-12-14 13:29:37,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:37,183 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 58 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:37,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 251 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8033 states. [2022-12-14 13:29:37,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8033 to 6421. [2022-12-14 13:29:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6421 states, 5281 states have (on average 1.389698920658966) internal successors, (7339), 5299 states have internal predecessors, (7339), 689 states have call successors, (689), 450 states have call predecessors, (689), 450 states have return successors, (689), 672 states have call predecessors, (689), 689 states have call successors, (689) [2022-12-14 13:29:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6421 states to 6421 states and 8717 transitions. [2022-12-14 13:29:37,462 INFO L78 Accepts]: Start accepts. Automaton has 6421 states and 8717 transitions. Word has length 124 [2022-12-14 13:29:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:37,462 INFO L495 AbstractCegarLoop]: Abstraction has 6421 states and 8717 transitions. [2022-12-14 13:29:37,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:29:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 6421 states and 8717 transitions. [2022-12-14 13:29:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 13:29:37,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:37,471 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:37,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 13:29:37,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:37,672 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1644428652, now seen corresponding path program 1 times [2022-12-14 13:29:37,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:37,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128683034] [2022-12-14 13:29:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:37,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 13:29:37,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:37,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128683034] [2022-12-14 13:29:37,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128683034] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:37,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335971215] [2022-12-14 13:29:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:37,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:37,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:37,789 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:37,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:29:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:37,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:29:37,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:29:37,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:37,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335971215] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:37,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:37,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-12-14 13:29:37,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380538210] [2022-12-14 13:29:37,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:37,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:29:37,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:37,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:29:37,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:37,946 INFO L87 Difference]: Start difference. First operand 6421 states and 8717 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:29:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:38,707 INFO L93 Difference]: Finished difference Result 15713 states and 21287 transitions. [2022-12-14 13:29:38,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:29:38,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 125 [2022-12-14 13:29:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:38,723 INFO L225 Difference]: With dead ends: 15713 [2022-12-14 13:29:38,723 INFO L226 Difference]: Without dead ends: 9343 [2022-12-14 13:29:38,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:29:38,733 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 380 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:38,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 268 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:29:38,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9343 states. [2022-12-14 13:29:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9343 to 9341. [2022-12-14 13:29:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9341 states, 7657 states have (on average 1.365939663053415) internal successors, (10459), 7683 states have internal predecessors, (10459), 1013 states have call successors, (1013), 670 states have call predecessors, (1013), 670 states have return successors, (1013), 988 states have call predecessors, (1013), 1013 states have call successors, (1013) [2022-12-14 13:29:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9341 states to 9341 states and 12485 transitions. [2022-12-14 13:29:39,181 INFO L78 Accepts]: Start accepts. Automaton has 9341 states and 12485 transitions. Word has length 125 [2022-12-14 13:29:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:39,181 INFO L495 AbstractCegarLoop]: Abstraction has 9341 states and 12485 transitions. [2022-12-14 13:29:39,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:29:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 9341 states and 12485 transitions. [2022-12-14 13:29:39,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 13:29:39,191 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:39,192 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:39,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:29:39,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 13:29:39,393 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:39,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:39,394 INFO L85 PathProgramCache]: Analyzing trace with hash -146302838, now seen corresponding path program 1 times [2022-12-14 13:29:39,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:39,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496041334] [2022-12-14 13:29:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:39,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 13:29:39,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:39,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496041334] [2022-12-14 13:29:39,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496041334] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:39,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569112578] [2022-12-14 13:29:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:39,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:39,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:39,549 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:39,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:29:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:29:39,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 13:29:39,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:39,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569112578] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:39,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:39,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-12-14 13:29:39,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074411651] [2022-12-14 13:29:39,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:39,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:29:39,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:39,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:29:39,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:39,716 INFO L87 Difference]: Start difference. First operand 9341 states and 12485 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:29:40,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:40,600 INFO L93 Difference]: Finished difference Result 22879 states and 30497 transitions. [2022-12-14 13:29:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:29:40,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-12-14 13:29:40,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:40,623 INFO L225 Difference]: With dead ends: 22879 [2022-12-14 13:29:40,624 INFO L226 Difference]: Without dead ends: 13589 [2022-12-14 13:29:40,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:29:40,637 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 322 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:40,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 320 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:29:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13589 states. [2022-12-14 13:29:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13589 to 13587. [2022-12-14 13:29:41,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13587 states, 11097 states have (on average 1.3402721456249438) internal successors, (14873), 11135 states have internal predecessors, (14873), 1491 states have call successors, (1491), 998 states have call predecessors, (1491), 998 states have return successors, (1491), 1454 states have call predecessors, (1491), 1491 states have call successors, (1491) [2022-12-14 13:29:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13587 states to 13587 states and 17855 transitions. [2022-12-14 13:29:41,443 INFO L78 Accepts]: Start accepts. Automaton has 13587 states and 17855 transitions. Word has length 127 [2022-12-14 13:29:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:41,443 INFO L495 AbstractCegarLoop]: Abstraction has 13587 states and 17855 transitions. [2022-12-14 13:29:41,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:29:41,444 INFO L276 IsEmpty]: Start isEmpty. Operand 13587 states and 17855 transitions. [2022-12-14 13:29:41,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 13:29:41,457 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:41,458 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:41,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:29:41,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:29:41,659 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:41,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:41,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1051115114, now seen corresponding path program 1 times [2022-12-14 13:29:41,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:41,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478613265] [2022-12-14 13:29:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:41,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:29:41,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:41,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478613265] [2022-12-14 13:29:41,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478613265] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:41,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687021601] [2022-12-14 13:29:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:41,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:41,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:41,745 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:41,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:29:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:41,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:29:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:29:41,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:41,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687021601] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:41,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:41,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:29:41,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224274514] [2022-12-14 13:29:41,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:41,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:29:41,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:41,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:29:41,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:29:41,876 INFO L87 Difference]: Start difference. First operand 13587 states and 17855 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-12-14 13:29:42,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:42,694 INFO L93 Difference]: Finished difference Result 25949 states and 34425 transitions. [2022-12-14 13:29:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:29:42,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) Word has length 125 [2022-12-14 13:29:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:42,724 INFO L225 Difference]: With dead ends: 25949 [2022-12-14 13:29:42,724 INFO L226 Difference]: Without dead ends: 16927 [2022-12-14 13:29:42,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:29:42,737 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 73 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:42,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 308 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16927 states. [2022-12-14 13:29:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16927 to 15405. [2022-12-14 13:29:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15405 states, 12699 states have (on average 1.3540436254823214) internal successors, (17195), 12737 states have internal predecessors, (17195), 1599 states have call successors, (1599), 1106 states have call predecessors, (1599), 1106 states have return successors, (1599), 1562 states have call predecessors, (1599), 1599 states have call successors, (1599) [2022-12-14 13:29:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15405 states to 15405 states and 20393 transitions. [2022-12-14 13:29:43,696 INFO L78 Accepts]: Start accepts. Automaton has 15405 states and 20393 transitions. Word has length 125 [2022-12-14 13:29:43,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:43,696 INFO L495 AbstractCegarLoop]: Abstraction has 15405 states and 20393 transitions. [2022-12-14 13:29:43,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-12-14 13:29:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 15405 states and 20393 transitions. [2022-12-14 13:29:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 13:29:43,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:43,711 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:43,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 13:29:43,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:43,912 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:43,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:43,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1999544501, now seen corresponding path program 1 times [2022-12-14 13:29:43,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:43,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788529777] [2022-12-14 13:29:43,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:43,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 13:29:44,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:44,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788529777] [2022-12-14 13:29:44,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788529777] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:44,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368972009] [2022-12-14 13:29:44,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:44,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:44,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:44,032 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:44,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:29:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:44,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:29:44,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 13:29:44,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:44,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368972009] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:44,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:44,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-12-14 13:29:44,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997121292] [2022-12-14 13:29:44,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:44,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:29:44,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:44,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:29:44,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:29:44,175 INFO L87 Difference]: Start difference. First operand 15405 states and 20393 transitions. Second operand has 6 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:29:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:45,615 INFO L93 Difference]: Finished difference Result 36770 states and 48560 transitions. [2022-12-14 13:29:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:29:45,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-12-14 13:29:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:45,649 INFO L225 Difference]: With dead ends: 36770 [2022-12-14 13:29:45,649 INFO L226 Difference]: Without dead ends: 21416 [2022-12-14 13:29:45,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:29:45,665 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 360 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:45,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 263 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:29:45,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21416 states. [2022-12-14 13:29:46,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21416 to 21414. [2022-12-14 13:29:46,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21414 states, 17552 states have (on average 1.3313582497721057) internal successors, (23368), 17608 states have internal predecessors, (23368), 2285 states have call successors, (2285), 1576 states have call predecessors, (2285), 1576 states have return successors, (2285), 2230 states have call predecessors, (2285), 2285 states have call successors, (2285) [2022-12-14 13:29:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21414 states to 21414 states and 27938 transitions. [2022-12-14 13:29:47,032 INFO L78 Accepts]: Start accepts. Automaton has 21414 states and 27938 transitions. Word has length 127 [2022-12-14 13:29:47,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:47,032 INFO L495 AbstractCegarLoop]: Abstraction has 21414 states and 27938 transitions. [2022-12-14 13:29:47,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:29:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 21414 states and 27938 transitions. [2022-12-14 13:29:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 13:29:47,061 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:47,061 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:47,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 13:29:47,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:29:47,263 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:47,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1102283732, now seen corresponding path program 1 times [2022-12-14 13:29:47,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:47,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565792330] [2022-12-14 13:29:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:47,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 13:29:47,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:47,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565792330] [2022-12-14 13:29:47,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565792330] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:47,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083495312] [2022-12-14 13:29:47,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:47,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:47,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:47,413 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:47,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:29:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:47,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:29:47,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:29:47,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:47,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083495312] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:47,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:47,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 13:29:47,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567674508] [2022-12-14 13:29:47,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:47,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:29:47,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:47,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:29:47,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:29:47,587 INFO L87 Difference]: Start difference. First operand 21414 states and 27938 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:29:49,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:49,139 INFO L93 Difference]: Finished difference Result 39890 states and 52332 transitions. [2022-12-14 13:29:49,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:29:49,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 129 [2022-12-14 13:29:49,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:49,180 INFO L225 Difference]: With dead ends: 39890 [2022-12-14 13:29:49,181 INFO L226 Difference]: Without dead ends: 24972 [2022-12-14 13:29:49,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:29:49,199 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 90 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:49,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 171 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24972 states. [2022-12-14 13:29:50,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24972 to 24704. [2022-12-14 13:29:50,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24704 states, 20603 states have (on average 1.3076251031403194) internal successors, (26941), 20659 states have internal predecessors, (26941), 2323 states have call successors, (2323), 1777 states have call predecessors, (2323), 1777 states have return successors, (2495), 2268 states have call predecessors, (2495), 2323 states have call successors, (2495) [2022-12-14 13:29:50,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24704 states to 24704 states and 31759 transitions. [2022-12-14 13:29:50,762 INFO L78 Accepts]: Start accepts. Automaton has 24704 states and 31759 transitions. Word has length 129 [2022-12-14 13:29:50,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:50,763 INFO L495 AbstractCegarLoop]: Abstraction has 24704 states and 31759 transitions. [2022-12-14 13:29:50,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:29:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 24704 states and 31759 transitions. [2022-12-14 13:29:50,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 13:29:50,793 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:50,793 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:50,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 13:29:50,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:50,995 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:50,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1620899784, now seen corresponding path program 1 times [2022-12-14 13:29:50,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:50,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852807964] [2022-12-14 13:29:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:50,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 46 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 13:29:51,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:51,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852807964] [2022-12-14 13:29:51,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852807964] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:51,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554864181] [2022-12-14 13:29:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:51,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:51,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:51,196 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:51,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 13:29:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:51,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 13:29:51,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:29:51,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:51,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554864181] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:51,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:51,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 13:29:51,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439217135] [2022-12-14 13:29:51,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:51,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:29:51,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:51,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:29:51,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:29:51,374 INFO L87 Difference]: Start difference. First operand 24704 states and 31759 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 13:29:53,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:53,653 INFO L93 Difference]: Finished difference Result 48848 states and 63013 transitions. [2022-12-14 13:29:53,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:29:53,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 131 [2022-12-14 13:29:53,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:53,711 INFO L225 Difference]: With dead ends: 48848 [2022-12-14 13:29:53,711 INFO L226 Difference]: Without dead ends: 31740 [2022-12-14 13:29:53,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:29:53,736 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 225 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:53,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 534 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:29:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31740 states. [2022-12-14 13:29:55,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31740 to 30114. [2022-12-14 13:29:55,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30114 states, 25027 states have (on average 1.2959204059615614) internal successors, (32433), 25047 states have internal predecessors, (32433), 2929 states have call successors, (2929), 2221 states have call predecessors, (2929), 2157 states have return successors, (3191), 2846 states have call predecessors, (3191), 2929 states have call successors, (3191) [2022-12-14 13:29:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30114 states to 30114 states and 38553 transitions. [2022-12-14 13:29:55,662 INFO L78 Accepts]: Start accepts. Automaton has 30114 states and 38553 transitions. Word has length 131 [2022-12-14 13:29:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:29:55,662 INFO L495 AbstractCegarLoop]: Abstraction has 30114 states and 38553 transitions. [2022-12-14 13:29:55,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 13:29:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 30114 states and 38553 transitions. [2022-12-14 13:29:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 13:29:55,684 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:29:55,684 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:29:55,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 13:29:55,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:55,885 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:29:55,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:29:55,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1115581598, now seen corresponding path program 1 times [2022-12-14 13:29:55,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:29:55,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859464884] [2022-12-14 13:29:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:55,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:29:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:29:55,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:29:55,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859464884] [2022-12-14 13:29:55,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859464884] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:29:55,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122337604] [2022-12-14 13:29:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:29:55,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:29:55,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:29:55,949 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:29:55,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 13:29:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:29:56,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:29:56,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:29:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:29:56,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:29:56,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122337604] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:29:56,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:29:56,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:29:56,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551948500] [2022-12-14 13:29:56,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:29:56,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:29:56,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:29:56,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:29:56,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:29:56,053 INFO L87 Difference]: Start difference. First operand 30114 states and 38553 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-12-14 13:29:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:29:58,635 INFO L93 Difference]: Finished difference Result 56500 states and 73121 transitions. [2022-12-14 13:29:58,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:29:58,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) Word has length 125 [2022-12-14 13:29:58,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:29:58,698 INFO L225 Difference]: With dead ends: 56500 [2022-12-14 13:29:58,698 INFO L226 Difference]: Without dead ends: 36402 [2022-12-14 13:29:58,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:29:58,720 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 65 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:29:58,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 303 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:29:58,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36402 states. [2022-12-14 13:30:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36402 to 33064. [2022-12-14 13:30:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33064 states, 27593 states have (on average 1.3047149639401296) internal successors, (36001), 27613 states have internal predecessors, (36001), 3121 states have call successors, (3121), 2413 states have call predecessors, (3121), 2349 states have return successors, (3383), 3038 states have call predecessors, (3383), 3121 states have call successors, (3383) [2022-12-14 13:30:00,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33064 states to 33064 states and 42505 transitions. [2022-12-14 13:30:00,784 INFO L78 Accepts]: Start accepts. Automaton has 33064 states and 42505 transitions. Word has length 125 [2022-12-14 13:30:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:00,784 INFO L495 AbstractCegarLoop]: Abstraction has 33064 states and 42505 transitions. [2022-12-14 13:30:00,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-12-14 13:30:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 33064 states and 42505 transitions. [2022-12-14 13:30:00,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 13:30:00,807 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:00,807 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:00,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 13:30:01,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:01,009 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:30:01,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:01,009 INFO L85 PathProgramCache]: Analyzing trace with hash 226095219, now seen corresponding path program 1 times [2022-12-14 13:30:01,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:01,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410978082] [2022-12-14 13:30:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:01,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 13:30:01,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:01,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410978082] [2022-12-14 13:30:01,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410978082] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:30:01,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072618557] [2022-12-14 13:30:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:01,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:01,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:01,088 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:01,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 13:30:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:01,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 13:30:01,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 51 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 13:30:01,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 13:30:01,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072618557] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 13:30:01,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 13:30:01,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 8] total 13 [2022-12-14 13:30:01,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808341428] [2022-12-14 13:30:01,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:30:01,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:30:01,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:01,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:30:01,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:30:01,544 INFO L87 Difference]: Start difference. First operand 33064 states and 42505 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:30:04,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:04,108 INFO L93 Difference]: Finished difference Result 56348 states and 72671 transitions. [2022-12-14 13:30:04,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:30:04,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 126 [2022-12-14 13:30:04,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:04,174 INFO L225 Difference]: With dead ends: 56348 [2022-12-14 13:30:04,174 INFO L226 Difference]: Without dead ends: 39599 [2022-12-14 13:30:04,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:30:04,198 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 122 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:04,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 315 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:30:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39599 states. [2022-12-14 13:30:06,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39599 to 37226. [2022-12-14 13:30:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37226 states, 31471 states have (on average 1.2862317689301261) internal successors, (40479), 31581 states have internal predecessors, (40479), 3151 states have call successors, (3151), 2569 states have call predecessors, (3151), 2603 states have return successors, (3503), 3076 states have call predecessors, (3503), 3151 states have call successors, (3503) [2022-12-14 13:30:06,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37226 states to 37226 states and 47133 transitions. [2022-12-14 13:30:06,713 INFO L78 Accepts]: Start accepts. Automaton has 37226 states and 47133 transitions. Word has length 126 [2022-12-14 13:30:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:06,713 INFO L495 AbstractCegarLoop]: Abstraction has 37226 states and 47133 transitions. [2022-12-14 13:30:06,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:30:06,714 INFO L276 IsEmpty]: Start isEmpty. Operand 37226 states and 47133 transitions. [2022-12-14 13:30:06,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 13:30:06,745 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:06,745 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, 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] [2022-12-14 13:30:06,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 13:30:06,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 13:30:06,947 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:30:06,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:06,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1538721390, now seen corresponding path program 1 times [2022-12-14 13:30:06,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:06,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93612356] [2022-12-14 13:30:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:06,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:30:07,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:07,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93612356] [2022-12-14 13:30:07,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93612356] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:30:07,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:30:07,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:30:07,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268221159] [2022-12-14 13:30:07,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:30:07,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:30:07,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:30:07,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:30:07,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:30:07,017 INFO L87 Difference]: Start difference. First operand 37226 states and 47133 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:30:09,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:30:09,701 INFO L93 Difference]: Finished difference Result 56173 states and 72129 transitions. [2022-12-14 13:30:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:30:09,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 126 [2022-12-14 13:30:09,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:30:09,770 INFO L225 Difference]: With dead ends: 56173 [2022-12-14 13:30:09,770 INFO L226 Difference]: Without dead ends: 36722 [2022-12-14 13:30:09,795 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 [2022-12-14 13:30:09,795 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 234 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:30:09,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 354 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:30:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36722 states. [2022-12-14 13:30:12,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36722 to 36650. [2022-12-14 13:30:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36650 states, 30922 states have (on average 1.2744324429208977) internal successors, (39408), 31005 states have internal predecessors, (39408), 3151 states have call successors, (3151), 2569 states have call predecessors, (3151), 2576 states have return successors, (3476), 3076 states have call predecessors, (3476), 3151 states have call successors, (3476) [2022-12-14 13:30:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36650 states to 36650 states and 46035 transitions. [2022-12-14 13:30:12,302 INFO L78 Accepts]: Start accepts. Automaton has 36650 states and 46035 transitions. Word has length 126 [2022-12-14 13:30:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:30:12,302 INFO L495 AbstractCegarLoop]: Abstraction has 36650 states and 46035 transitions. [2022-12-14 13:30:12,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:30:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 36650 states and 46035 transitions. [2022-12-14 13:30:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 13:30:12,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:30:12,328 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:30:12,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 13:30:12,328 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:30:12,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:30:12,329 INFO L85 PathProgramCache]: Analyzing trace with hash -338819370, now seen corresponding path program 1 times [2022-12-14 13:30:12,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:30:12,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455154037] [2022-12-14 13:30:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:12,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:30:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 13 proven. 46 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 13:30:12,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:30:12,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455154037] [2022-12-14 13:30:12,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455154037] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:30:12,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371726226] [2022-12-14 13:30:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:30:12,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:30:12,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:30:12,670 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:30:12,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 13:30:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:30:12,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:30:12,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:30:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 68 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:30:12,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:30:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 13:30:13,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371726226] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:30:13,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [583209780] [2022-12-14 13:30:13,102 INFO L159 IcfgInterpreter]: Started Sifa with 72 locations of interest [2022-12-14 13:30:13,102 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:30:13,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:30:13,108 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:30:13,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:30:23,767 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 154 for LOIs [2022-12-14 13:30:24,505 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 204 for LOIs [2022-12-14 13:31:37,216 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 164 for LOIs [2022-12-14 13:31:37,297 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 40 for LOIs [2022-12-14 13:31:37,311 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 55 for LOIs [2022-12-14 13:31:38,734 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 66 for LOIs [2022-12-14 13:31:43,459 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:32:48,551 WARN L233 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 1862 DAG size of output: 1809 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:33:05,993 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '995149#(and (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (not (= ~token~0 (+ ~local~0 4))) (<= 0 (+ ~local~0 2147483648)) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 0 ~t3_pc~0) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 13:33:05,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:33:05,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:33:05,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 19 [2022-12-14 13:33:05,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992249995] [2022-12-14 13:33:05,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:33:05,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 13:33:05,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:33:05,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 13:33:05,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=4347, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 13:33:05,996 INFO L87 Difference]: Start difference. First operand 36650 states and 46035 transitions. Second operand has 19 states, 15 states have (on average 11.0) internal successors, (165), 17 states have internal predecessors, (165), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-12-14 13:33:13,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:13,627 INFO L93 Difference]: Finished difference Result 80669 states and 103745 transitions. [2022-12-14 13:33:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-12-14 13:33:13,627 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 11.0) internal successors, (165), 17 states have internal predecessors, (165), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 130 [2022-12-14 13:33:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:13,702 INFO L225 Difference]: With dead ends: 80669 [2022-12-14 13:33:13,702 INFO L226 Difference]: Without dead ends: 44025 [2022-12-14 13:33:13,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 418 SyntacticMatches, 9 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21171 ImplicationChecksByTransitivity, 84.4s TimeCoverageRelationStatistics Valid=3161, Invalid=44581, Unknown=0, NotChecked=0, Total=47742 [2022-12-14 13:33:13,762 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 2927 mSDsluCounter, 3601 mSDsCounter, 0 mSdLazyCounter, 5466 mSolverCounterSat, 839 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2946 SdHoareTripleChecker+Valid, 3938 SdHoareTripleChecker+Invalid, 6305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 839 IncrementalHoareTripleChecker+Valid, 5466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:13,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2946 Valid, 3938 Invalid, 6305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [839 Valid, 5466 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 13:33:13,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44025 states. [2022-12-14 13:33:15,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44025 to 25695. [2022-12-14 13:33:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25695 states, 21843 states have (on average 1.266767385432404) internal successors, (27670), 21911 states have internal predecessors, (27670), 2042 states have call successors, (2042), 1802 states have call predecessors, (2042), 1809 states have return successors, (2223), 1981 states have call predecessors, (2223), 2042 states have call successors, (2223) [2022-12-14 13:33:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25695 states to 25695 states and 31935 transitions. [2022-12-14 13:33:15,865 INFO L78 Accepts]: Start accepts. Automaton has 25695 states and 31935 transitions. Word has length 130 [2022-12-14 13:33:15,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:15,865 INFO L495 AbstractCegarLoop]: Abstraction has 25695 states and 31935 transitions. [2022-12-14 13:33:15,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 11.0) internal successors, (165), 17 states have internal predecessors, (165), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-12-14 13:33:15,865 INFO L276 IsEmpty]: Start isEmpty. Operand 25695 states and 31935 transitions. [2022-12-14 13:33:15,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 13:33:15,881 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:15,881 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, 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] [2022-12-14 13:33:15,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 13:33:16,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 13:33:16,082 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:33:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:16,083 INFO L85 PathProgramCache]: Analyzing trace with hash -545975945, now seen corresponding path program 1 times [2022-12-14 13:33:16,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:16,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569944156] [2022-12-14 13:33:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:16,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 13:33:16,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:33:16,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569944156] [2022-12-14 13:33:16,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569944156] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:33:16,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:33:16,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:33:16,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313874415] [2022-12-14 13:33:16,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:33:16,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:33:16,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:33:16,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:33:16,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:33:16,209 INFO L87 Difference]: Start difference. First operand 25695 states and 31935 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:33:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:33:18,774 INFO L93 Difference]: Finished difference Result 47404 states and 58988 transitions. [2022-12-14 13:33:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:33:18,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 127 [2022-12-14 13:33:18,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:33:18,823 INFO L225 Difference]: With dead ends: 47404 [2022-12-14 13:33:18,823 INFO L226 Difference]: Without dead ends: 33110 [2022-12-14 13:33:18,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:33:18,838 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 126 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:33:18,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 391 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:33:18,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33110 states. [2022-12-14 13:33:21,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33110 to 31723. [2022-12-14 13:33:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31723 states, 26805 states have (on average 1.2613691475470994) internal successors, (33811), 26902 states have internal predecessors, (33811), 2636 states have call successors, (2636), 2276 states have call predecessors, (2636), 2281 states have return successors, (2964), 2544 states have call predecessors, (2964), 2636 states have call successors, (2964) [2022-12-14 13:33:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31723 states to 31723 states and 39411 transitions. [2022-12-14 13:33:22,009 INFO L78 Accepts]: Start accepts. Automaton has 31723 states and 39411 transitions. Word has length 127 [2022-12-14 13:33:22,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:33:22,009 INFO L495 AbstractCegarLoop]: Abstraction has 31723 states and 39411 transitions. [2022-12-14 13:33:22,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:33:22,010 INFO L276 IsEmpty]: Start isEmpty. Operand 31723 states and 39411 transitions. [2022-12-14 13:33:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 13:33:22,030 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:33:22,030 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:33:22,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 13:33:22,030 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:33:22,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:33:22,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1739973095, now seen corresponding path program 1 times [2022-12-14 13:33:22,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:33:22,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452605213] [2022-12-14 13:33:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:22,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:33:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 13:33:22,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:33:22,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452605213] [2022-12-14 13:33:22,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452605213] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:33:22,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763704877] [2022-12-14 13:33:22,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:33:22,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:33:22,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:33:22,176 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:33:22,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 13:33:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:33:22,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 13:33:22,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:33:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 68 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:33:22,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:33:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 13:33:22,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763704877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:33:22,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [693388702] [2022-12-14 13:33:22,638 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-12-14 13:33:22,638 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:33:22,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:33:22,639 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:33:22,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:33:26,103 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 155 for LOIs [2022-12-14 13:34:30,812 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 205 for LOIs [2022-12-14 13:34:50,693 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 165 for LOIs [2022-12-14 13:34:50,725 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 41 for LOIs [2022-12-14 13:34:50,732 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 56 for LOIs [2022-12-14 13:34:50,792 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 41 for LOIs [2022-12-14 13:34:50,970 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:35:12,345 WARN L233 SmtUtils]: Spent 20.23s on a formula simplification. DAG size of input: 722 DAG size of output: 668 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:35:43,884 WARN L233 SmtUtils]: Spent 26.63s on a formula simplification. DAG size of input: 1263 DAG size of output: 828 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:35:52,368 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1245796#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (not (= ~token~0 (+ ~local~0 4))) (<= 0 (+ ~local~0 2147483648)) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 0 ~t3_pc~0) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-12-14 13:35:52,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:35:52,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:35:52,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 17 [2022-12-14 13:35:52,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209309466] [2022-12-14 13:35:52,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:35:52,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 13:35:52,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:35:52,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 13:35:52,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=4530, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 13:35:52,370 INFO L87 Difference]: Start difference. First operand 31723 states and 39411 transitions. Second operand has 17 states, 14 states have (on average 10.285714285714286) internal successors, (144), 15 states have internal predecessors, (144), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2022-12-14 13:36:03,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:03,677 INFO L93 Difference]: Finished difference Result 95470 states and 123506 transitions. [2022-12-14 13:36:03,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2022-12-14 13:36:03,677 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 10.285714285714286) internal successors, (144), 15 states have internal predecessors, (144), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) Word has length 133 [2022-12-14 13:36:03,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:03,792 INFO L225 Difference]: With dead ends: 95470 [2022-12-14 13:36:03,792 INFO L226 Difference]: Without dead ends: 65265 [2022-12-14 13:36:03,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 445 SyntacticMatches, 3 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39433 ImplicationChecksByTransitivity, 64.2s TimeCoverageRelationStatistics Valid=7087, Invalid=79055, Unknown=0, NotChecked=0, Total=86142 [2022-12-14 13:36:03,839 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 2340 mSDsluCounter, 6021 mSDsCounter, 0 mSdLazyCounter, 4784 mSolverCounterSat, 954 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2352 SdHoareTripleChecker+Valid, 6663 SdHoareTripleChecker+Invalid, 5738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 954 IncrementalHoareTripleChecker+Valid, 4784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:03,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2352 Valid, 6663 Invalid, 5738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [954 Valid, 4784 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 13:36:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65265 states. [2022-12-14 13:36:07,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65265 to 45743. [2022-12-14 13:36:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45743 states, 39108 states have (on average 1.2595632607139204) internal successors, (49259), 39303 states have internal predecessors, (49259), 3369 states have call successors, (3369), 3117 states have call predecessors, (3369), 3265 states have return successors, (4667), 3322 states have call predecessors, (4667), 3369 states have call successors, (4667) [2022-12-14 13:36:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45743 states to 45743 states and 57295 transitions. [2022-12-14 13:36:07,873 INFO L78 Accepts]: Start accepts. Automaton has 45743 states and 57295 transitions. Word has length 133 [2022-12-14 13:36:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:07,873 INFO L495 AbstractCegarLoop]: Abstraction has 45743 states and 57295 transitions. [2022-12-14 13:36:07,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 10.285714285714286) internal successors, (144), 15 states have internal predecessors, (144), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2022-12-14 13:36:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 45743 states and 57295 transitions. [2022-12-14 13:36:07,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 13:36:07,896 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:07,897 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:36:07,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 13:36:08,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:08,098 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:08,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:08,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1483152052, now seen corresponding path program 1 times [2022-12-14 13:36:08,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:08,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657764063] [2022-12-14 13:36:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:08,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 13:36:08,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:08,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657764063] [2022-12-14 13:36:08,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657764063] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:36:08,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604516855] [2022-12-14 13:36:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:08,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:08,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:36:08,256 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:36:08,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bfb5a76-8af7-4bde-8035-6148ee9f6e7e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 13:36:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:08,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 13:36:08,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 66 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:36:08,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:36:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 13:36:08,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604516855] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:36:08,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1272790569] [2022-12-14 13:36:08,766 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2022-12-14 13:36:08,766 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:36:08,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:36:08,766 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:36:08,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:36:12,236 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 156 for LOIs [2022-12-14 13:37:47,523 WARN L233 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 1312 DAG size of output: 1310 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 13:40:39,803 WARN L233 SmtUtils]: Spent 14.08s on a formula simplification. DAG size of input: 2468 DAG size of output: 2466 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 13:43:40,682 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 206 for LOIs