./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0dcd4461cca64e9ab41b6ad7ff4c6eaa4177bddcca1c612fa1571b77ac664a95 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:08:13,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:08:13,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:08:13,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:08:13,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:08:13,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:08:13,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:08:13,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:08:13,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:08:13,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:08:13,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:08:13,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:08:13,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:08:13,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:08:13,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:08:13,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:08:13,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:08:13,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:08:13,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:08:13,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:08:13,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:08:13,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:08:13,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:08:13,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:08:13,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:08:13,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:08:13,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:08:13,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:08:13,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:08:13,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:08:13,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:08:13,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:08:13,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:08:13,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:08:13,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:08:13,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:08:13,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:08:13,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:08:13,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:08:13,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:08:13,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:08:13,669 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:08:13,709 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:08:13,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:08:13,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:08:13,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:08:13,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:08:13,712 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:08:13,712 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:08:13,712 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:08:13,712 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:08:13,712 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:08:13,712 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:08:13,713 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:08:13,713 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:08:13,713 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:08:13,713 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:08:13,713 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:08:13,713 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:08:13,714 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:08:13,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:08:13,715 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:08:13,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:08:13,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:08:13,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:08:13,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:08:13,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:08:13,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:08:13,716 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:08:13,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:08:13,716 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:08:13,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:08:13,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:08:13,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:08:13,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:08:13,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:08:13,718 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:08:13,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:08:13,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:08:13,719 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:08:13,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:08:13,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:08:13,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:08:13,721 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_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dcd4461cca64e9ab41b6ad7ff4c6eaa4177bddcca1c612fa1571b77ac664a95 [2022-11-03 02:08:13,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:08:14,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:08:14,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:08:14,004 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:08:14,005 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:08:14,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/systemc/token_ring.13.cil-2.c [2022-11-03 02:08:14,070 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/data/5aa35375d/8158795bedf6458594b654083acea89d/FLAGd0bbf0691 [2022-11-03 02:08:14,566 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:08:14,566 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/sv-benchmarks/c/systemc/token_ring.13.cil-2.c [2022-11-03 02:08:14,599 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/data/5aa35375d/8158795bedf6458594b654083acea89d/FLAGd0bbf0691 [2022-11-03 02:08:14,922 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/data/5aa35375d/8158795bedf6458594b654083acea89d [2022-11-03 02:08:14,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:08:14,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:08:14,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:08:14,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:08:14,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:08:14,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:08:14" (1/1) ... [2022-11-03 02:08:14,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f669b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:14, skipping insertion in model container [2022-11-03 02:08:14,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:08:14" (1/1) ... [2022-11-03 02:08:14,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:08:14,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:08:15,236 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/sv-benchmarks/c/systemc/token_ring.13.cil-2.c[671,684] [2022-11-03 02:08:15,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:08:15,434 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:08:15,446 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/sv-benchmarks/c/systemc/token_ring.13.cil-2.c[671,684] [2022-11-03 02:08:15,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:08:15,537 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:08:15,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:15 WrapperNode [2022-11-03 02:08:15,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:08:15,539 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:08:15,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:08:15,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:08:15,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:15" (1/1) ... [2022-11-03 02:08:15,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:15" (1/1) ... [2022-11-03 02:08:15,621 INFO L138 Inliner]: procedures = 54, calls = 70, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 911 [2022-11-03 02:08:15,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:08:15,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:08:15,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:08:15,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:08:15,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:15" (1/1) ... [2022-11-03 02:08:15,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:15" (1/1) ... [2022-11-03 02:08:15,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:15" (1/1) ... [2022-11-03 02:08:15,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:15" (1/1) ... [2022-11-03 02:08:15,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:15" (1/1) ... [2022-11-03 02:08:15,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:15" (1/1) ... [2022-11-03 02:08:15,666 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:15" (1/1) ... [2022-11-03 02:08:15,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:15" (1/1) ... [2022-11-03 02:08:15,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:08:15,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:08:15,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:08:15,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:08:15,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:15" (1/1) ... [2022-11-03 02:08:15,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:08:15,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:15,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:08:15,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:08:15,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:08:15,767 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 02:08:15,767 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 02:08:15,767 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:08:15,768 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:08:15,768 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 02:08:15,768 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 02:08:15,768 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 02:08:15,768 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 02:08:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 02:08:15,769 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 02:08:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 02:08:15,769 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 02:08:15,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:08:15,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:08:15,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:08:15,895 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:08:15,897 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:08:16,982 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:08:17,557 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:08:17,557 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-03 02:08:17,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:08:17 BoogieIcfgContainer [2022-11-03 02:08:17,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:08:17,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:08:17,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:08:17,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:08:17,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:08:14" (1/3) ... [2022-11-03 02:08:17,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573527d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:08:17, skipping insertion in model container [2022-11-03 02:08:17,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:08:15" (2/3) ... [2022-11-03 02:08:17,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573527d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:08:17, skipping insertion in model container [2022-11-03 02:08:17,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:08:17" (3/3) ... [2022-11-03 02:08:17,571 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.13.cil-2.c [2022-11-03 02:08:17,601 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:08:17,602 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:08:17,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:08:17,681 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;@4a0a5fbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:08:17,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:08:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 199 states, 164 states have (on average 1.5609756097560976) internal successors, (256), 166 states have internal predecessors, (256), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-03 02:08:17,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 02:08:17,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:17,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:17,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:17,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:17,702 INFO L85 PathProgramCache]: Analyzing trace with hash 784490566, now seen corresponding path program 1 times [2022-11-03 02:08:17,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:17,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101594863] [2022-11-03 02:08:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:17,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:18,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:18,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101594863] [2022-11-03 02:08:18,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101594863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:18,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:18,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:18,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435755362] [2022-11-03 02:08:18,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:18,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:08:18,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:18,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:08:18,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:18,276 INFO L87 Difference]: Start difference. First operand has 199 states, 164 states have (on average 1.5609756097560976) internal successors, (256), 166 states have internal predecessors, (256), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:08:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:18,947 INFO L93 Difference]: Finished difference Result 580 states and 938 transitions. [2022-11-03 02:08:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:08:18,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 69 [2022-11-03 02:08:18,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:18,961 INFO L225 Difference]: With dead ends: 580 [2022-11-03 02:08:18,961 INFO L226 Difference]: Without dead ends: 382 [2022-11-03 02:08:18,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:18,970 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 541 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:18,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 866 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:08:18,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-03 02:08:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 381. [2022-11-03 02:08:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 318 states have (on average 1.5220125786163523) internal successors, (484), 320 states have internal predecessors, (484), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-03 02:08:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 584 transitions. [2022-11-03 02:08:19,051 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 584 transitions. Word has length 69 [2022-11-03 02:08:19,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:19,052 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 584 transitions. [2022-11-03 02:08:19,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:08:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 584 transitions. [2022-11-03 02:08:19,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:08:19,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:19,061 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:19,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:08:19,061 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:19,062 INFO L85 PathProgramCache]: Analyzing trace with hash -300169029, now seen corresponding path program 1 times [2022-11-03 02:08:19,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:19,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291974326] [2022-11-03 02:08:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:19,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:08:19,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:19,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291974326] [2022-11-03 02:08:19,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291974326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:08:19,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75188559] [2022-11-03 02:08:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:19,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:19,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:19,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:19,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:08:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:19,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:08:19,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:08:19,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:19,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75188559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:19,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:08:19,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:08:19,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886162032] [2022-11-03 02:08:19,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:19,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:19,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:19,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:19,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:19,939 INFO L87 Difference]: Start difference. First operand 381 states and 584 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:08:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:20,176 INFO L93 Difference]: Finished difference Result 1126 states and 1757 transitions. [2022-11-03 02:08:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:20,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 142 [2022-11-03 02:08:20,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:20,187 INFO L225 Difference]: With dead ends: 1126 [2022-11-03 02:08:20,187 INFO L226 Difference]: Without dead ends: 750 [2022-11-03 02:08:20,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:20,191 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 258 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:20,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 545 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:08:20,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-11-03 02:08:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 746. [2022-11-03 02:08:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 627 states have (on average 1.5199362041467304) internal successors, (953), 630 states have internal predecessors, (953), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 02:08:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1141 transitions. [2022-11-03 02:08:20,288 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1141 transitions. Word has length 142 [2022-11-03 02:08:20,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:20,290 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 1141 transitions. [2022-11-03 02:08:20,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:08:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1141 transitions. [2022-11-03 02:08:20,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:08:20,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:20,304 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:20,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:20,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:20,527 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash -886186819, now seen corresponding path program 1 times [2022-11-03 02:08:20,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:20,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553141978] [2022-11-03 02:08:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:20,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:08:20,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:20,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553141978] [2022-11-03 02:08:20,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553141978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:08:20,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666585548] [2022-11-03 02:08:20,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:20,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:20,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:20,813 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:20,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:08:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:21,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:08:21,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:08:21,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:21,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666585548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:21,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:08:21,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:08:21,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926501919] [2022-11-03 02:08:21,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:21,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:21,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:21,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:21,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:21,201 INFO L87 Difference]: Start difference. First operand 746 states and 1141 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:08:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:21,436 INFO L93 Difference]: Finished difference Result 2215 states and 3448 transitions. [2022-11-03 02:08:21,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:21,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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 142 [2022-11-03 02:08:21,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:21,448 INFO L225 Difference]: With dead ends: 2215 [2022-11-03 02:08:21,449 INFO L226 Difference]: Without dead ends: 1474 [2022-11-03 02:08:21,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:21,454 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 270 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:21,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 533 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:08:21,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2022-11-03 02:08:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1468. [2022-11-03 02:08:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1239 states have (on average 1.516545601291364) internal successors, (1879), 1244 states have internal predecessors, (1879), 180 states have call successors, (180), 48 states have call predecessors, (180), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2022-11-03 02:08:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 2239 transitions. [2022-11-03 02:08:21,564 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 2239 transitions. Word has length 142 [2022-11-03 02:08:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:21,585 INFO L495 AbstractCegarLoop]: Abstraction has 1468 states and 2239 transitions. [2022-11-03 02:08:21,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:08:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 2239 transitions. [2022-11-03 02:08:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:08:21,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:21,591 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:21,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:21,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-03 02:08:21,792 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:21,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:21,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1228407361, now seen corresponding path program 1 times [2022-11-03 02:08:21,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:21,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59317258] [2022-11-03 02:08:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:21,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:08:22,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:22,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59317258] [2022-11-03 02:08:22,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59317258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:08:22,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716322020] [2022-11-03 02:08:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:22,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:22,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:22,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:22,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:08:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:22,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:08:22,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:08:22,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:22,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716322020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:22,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:08:22,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:08:22,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370945212] [2022-11-03 02:08:22,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:22,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:22,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:22,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:22,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:22,343 INFO L87 Difference]: Start difference. First operand 1468 states and 2239 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:08:22,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:22,642 INFO L93 Difference]: Finished difference Result 4369 states and 6780 transitions. [2022-11-03 02:08:22,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:22,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 142 [2022-11-03 02:08:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:22,657 INFO L225 Difference]: With dead ends: 4369 [2022-11-03 02:08:22,657 INFO L226 Difference]: Without dead ends: 2906 [2022-11-03 02:08:22,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:22,664 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 252 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:22,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 511 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:08:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2022-11-03 02:08:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 2896. [2022-11-03 02:08:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2451 states have (on average 1.5124439004487964) internal successors, (3707), 2460 states have internal predecessors, (3707), 348 states have call successors, (348), 96 states have call predecessors, (348), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2022-11-03 02:08:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4403 transitions. [2022-11-03 02:08:22,845 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4403 transitions. Word has length 142 [2022-11-03 02:08:22,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:22,846 INFO L495 AbstractCegarLoop]: Abstraction has 2896 states and 4403 transitions. [2022-11-03 02:08:22,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:08:22,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4403 transitions. [2022-11-03 02:08:22,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:08:22,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:22,854 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:22,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:23,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:23,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:23,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:23,083 INFO L85 PathProgramCache]: Analyzing trace with hash -935103, now seen corresponding path program 1 times [2022-11-03 02:08:23,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:23,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450199668] [2022-11-03 02:08:23,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:23,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:08:23,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:23,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450199668] [2022-11-03 02:08:23,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450199668] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:08:23,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126536709] [2022-11-03 02:08:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:23,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:23,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:23,344 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:23,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:08:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:23,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:08:23,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:08:23,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:23,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126536709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:23,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:08:23,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:08:23,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139947949] [2022-11-03 02:08:23,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:23,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:23,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:23,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:23,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:23,654 INFO L87 Difference]: Start difference. First operand 2896 states and 4403 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:08:24,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:24,041 INFO L93 Difference]: Finished difference Result 8629 states and 13344 transitions. [2022-11-03 02:08:24,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:24,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 142 [2022-11-03 02:08:24,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:24,125 INFO L225 Difference]: With dead ends: 8629 [2022-11-03 02:08:24,125 INFO L226 Difference]: Without dead ends: 5738 [2022-11-03 02:08:24,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:24,137 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 279 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:24,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 531 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:08:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5738 states. [2022-11-03 02:08:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5738 to 5720. [2022-11-03 02:08:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5720 states, 4851 states have (on average 1.507936507936508) internal successors, (7315), 4868 states have internal predecessors, (7315), 676 states have call successors, (676), 192 states have call predecessors, (676), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2022-11-03 02:08:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5720 states to 5720 states and 8667 transitions. [2022-11-03 02:08:24,497 INFO L78 Accepts]: Start accepts. Automaton has 5720 states and 8667 transitions. Word has length 142 [2022-11-03 02:08:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:24,498 INFO L495 AbstractCegarLoop]: Abstraction has 5720 states and 8667 transitions. [2022-11-03 02:08:24,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:08:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5720 states and 8667 transitions. [2022-11-03 02:08:24,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:08:24,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:24,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:24,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 02:08:24,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:24,730 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:24,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash -507536257, now seen corresponding path program 1 times [2022-11-03 02:08:24,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:24,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927179220] [2022-11-03 02:08:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:24,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:08:24,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:24,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927179220] [2022-11-03 02:08:24,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927179220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:08:24,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491682530] [2022-11-03 02:08:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:24,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:24,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:24,971 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:24,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:08:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:25,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:08:25,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:08:25,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:25,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491682530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:25,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:08:25,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:08:25,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159438874] [2022-11-03 02:08:25,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:25,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:25,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:25,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:25,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:25,274 INFO L87 Difference]: Start difference. First operand 5720 states and 8667 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:08:25,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:25,864 INFO L93 Difference]: Finished difference Result 17053 states and 26272 transitions. [2022-11-03 02:08:25,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:25,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 142 [2022-11-03 02:08:25,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:25,929 INFO L225 Difference]: With dead ends: 17053 [2022-11-03 02:08:25,930 INFO L226 Difference]: Without dead ends: 11338 [2022-11-03 02:08:25,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:25,958 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 276 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:25,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 541 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:08:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11338 states. [2022-11-03 02:08:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11338 to 11304. [2022-11-03 02:08:26,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11304 states, 9603 states have (on average 1.5031760908049567) internal successors, (14435), 9636 states have internal predecessors, (14435), 1316 states have call successors, (1316), 384 states have call predecessors, (1316), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2022-11-03 02:08:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11304 states to 11304 states and 17067 transitions. [2022-11-03 02:08:26,692 INFO L78 Accepts]: Start accepts. Automaton has 11304 states and 17067 transitions. Word has length 142 [2022-11-03 02:08:26,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:26,693 INFO L495 AbstractCegarLoop]: Abstraction has 11304 states and 17067 transitions. [2022-11-03 02:08:26,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:08:26,694 INFO L276 IsEmpty]: Start isEmpty. Operand 11304 states and 17067 transitions. [2022-11-03 02:08:26,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:08:26,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:26,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:26,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:26,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:26,946 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:26,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:26,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1229550593, now seen corresponding path program 1 times [2022-11-03 02:08:26,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:26,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666943804] [2022-11-03 02:08:26,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:26,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:08:27,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:27,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666943804] [2022-11-03 02:08:27,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666943804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:08:27,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98958491] [2022-11-03 02:08:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:27,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:27,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:27,181 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:27,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:08:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:27,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:08:27,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:08:27,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:27,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98958491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:27,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:08:27,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:08:27,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945261600] [2022-11-03 02:08:27,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:27,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:27,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:27,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:27,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:27,577 INFO L87 Difference]: Start difference. First operand 11304 states and 17067 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:08:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:28,586 INFO L93 Difference]: Finished difference Result 33709 states and 51728 transitions. [2022-11-03 02:08:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:28,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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 142 [2022-11-03 02:08:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:28,690 INFO L225 Difference]: With dead ends: 33709 [2022-11-03 02:08:28,691 INFO L226 Difference]: Without dead ends: 22410 [2022-11-03 02:08:28,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:28,735 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 264 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:28,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 511 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:08:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22410 states. [2022-11-03 02:08:30,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22410 to 22344. [2022-11-03 02:08:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22344 states, 19011 states have (on average 1.498237862290253) internal successors, (28483), 19076 states have internal predecessors, (28483), 2564 states have call successors, (2564), 768 states have call predecessors, (2564), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2022-11-03 02:08:30,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22344 states to 22344 states and 33611 transitions. [2022-11-03 02:08:30,207 INFO L78 Accepts]: Start accepts. Automaton has 22344 states and 33611 transitions. Word has length 142 [2022-11-03 02:08:30,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:30,208 INFO L495 AbstractCegarLoop]: Abstraction has 22344 states and 33611 transitions. [2022-11-03 02:08:30,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:08:30,209 INFO L276 IsEmpty]: Start isEmpty. Operand 22344 states and 33611 transitions. [2022-11-03 02:08:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:08:30,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:30,252 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:30,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:30,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:30,466 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:30,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:30,467 INFO L85 PathProgramCache]: Analyzing trace with hash -146211197, now seen corresponding path program 1 times [2022-11-03 02:08:30,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:30,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419187388] [2022-11-03 02:08:30,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:30,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:08:30,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:30,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419187388] [2022-11-03 02:08:30,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419187388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:08:30,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116420123] [2022-11-03 02:08:30,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:30,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:30,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:30,847 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:30,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:08:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:31,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:08:31,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:08:31,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:31,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116420123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:31,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:08:31,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:08:31,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323909430] [2022-11-03 02:08:31,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:31,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:31,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:31,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:31,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:31,192 INFO L87 Difference]: Start difference. First operand 22344 states and 33611 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:08:33,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:33,078 INFO L93 Difference]: Finished difference Result 66637 states and 101840 transitions. [2022-11-03 02:08:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:33,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 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 142 [2022-11-03 02:08:33,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:33,286 INFO L225 Difference]: With dead ends: 66637 [2022-11-03 02:08:33,286 INFO L226 Difference]: Without dead ends: 44298 [2022-11-03 02:08:33,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:33,359 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 249 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:33,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 511 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:08:33,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44298 states. [2022-11-03 02:08:35,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44298 to 44168. [2022-11-03 02:08:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44168 states, 37635 states have (on average 1.4931579646605553) internal successors, (56195), 37764 states have internal predecessors, (56195), 4996 states have call successors, (4996), 1536 states have call predecessors, (4996), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2022-11-03 02:08:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44168 states to 44168 states and 66187 transitions. [2022-11-03 02:08:35,850 INFO L78 Accepts]: Start accepts. Automaton has 44168 states and 66187 transitions. Word has length 142 [2022-11-03 02:08:35,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:35,850 INFO L495 AbstractCegarLoop]: Abstraction has 44168 states and 66187 transitions. [2022-11-03 02:08:35,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:08:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 44168 states and 66187 transitions. [2022-11-03 02:08:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:08:36,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:36,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:36,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:36,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_503a255d-06e3-48a1-b744-0b77a715819a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:08:36,332 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:36,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:36,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1555431359, now seen corresponding path program 1 times [2022-11-03 02:08:36,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:36,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148639403] [2022-11-03 02:08:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:36,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:08:37,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:37,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148639403] [2022-11-03 02:08:37,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148639403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:37,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:37,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:08:37,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919591263] [2022-11-03 02:08:37,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:37,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:37,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:37,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:37,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:37,227 INFO L87 Difference]: Start difference. First operand 44168 states and 66187 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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) [2022-11-03 02:08:42,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:42,224 INFO L93 Difference]: Finished difference Result 155276 states and 232462 transitions. [2022-11-03 02:08:42,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:08:42,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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 142 [2022-11-03 02:08:42,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:42,962 INFO L225 Difference]: With dead ends: 155276 [2022-11-03 02:08:42,962 INFO L226 Difference]: Without dead ends: 111114 [2022-11-03 02:08:43,119 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 [2022-11-03 02:08:43,120 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 1214 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:43,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 765 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:08:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111114 states. [2022-11-03 02:08:47,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111114 to 86792. [2022-11-03 02:08:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86792 states, 73987 states have (on average 1.487869490586184) internal successors, (110083), 74244 states have internal predecessors, (110083), 9732 states have call successors, (9732), 3072 states have call predecessors, (9732), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2022-11-03 02:08:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86792 states to 86792 states and 129547 transitions. [2022-11-03 02:08:48,931 INFO L78 Accepts]: Start accepts. Automaton has 86792 states and 129547 transitions. Word has length 142 [2022-11-03 02:08:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:48,933 INFO L495 AbstractCegarLoop]: Abstraction has 86792 states and 129547 transitions. [2022-11-03 02:08:48,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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) [2022-11-03 02:08:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 86792 states and 129547 transitions. [2022-11-03 02:08:49,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 02:08:49,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:49,141 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:08:49,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:08:49,141 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:49,142 INFO L85 PathProgramCache]: Analyzing trace with hash -877198779, now seen corresponding path program 1 times [2022-11-03 02:08:49,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:49,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872789324] [2022-11-03 02:08:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:49,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:08:49,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:49,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872789324] [2022-11-03 02:08:49,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872789324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:49,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:49,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:08:49,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952623724] [2022-11-03 02:08:49,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:49,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:08:49,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:49,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:08:49,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:08:49,986 INFO L87 Difference]: Start difference. First operand 86792 states and 129547 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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) [2022-11-03 02:08:57,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:57,877 INFO L93 Difference]: Finished difference Result 238476 states and 356493 transitions. [2022-11-03 02:08:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:08:57,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 143 [2022-11-03 02:08:57,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:58,480 INFO L225 Difference]: With dead ends: 238476 [2022-11-03 02:08:58,480 INFO L226 Difference]: Without dead ends: 151690 [2022-11-03 02:08:58,648 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 [2022-11-03 02:08:58,649 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 1067 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:58,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 821 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:08:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151690 states.