./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d0fbec14d1477738cb6d25ea9b61fc7005f787f2c8a0ac2c555d7e4fa1dbf47 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:04:38,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:04:38,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:04:38,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:04:38,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:04:38,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:04:38,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:04:38,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:04:38,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:04:38,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:04:38,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:04:38,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:04:38,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:04:38,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:04:38,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:04:38,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:04:38,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:04:38,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:04:38,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:04:38,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:04:38,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:04:38,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:04:38,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:04:38,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:04:38,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:04:38,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:04:38,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:04:38,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:04:38,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:04:38,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:04:38,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:04:38,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:04:38,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:04:38,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:04:38,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:04:38,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:04:38,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:04:38,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:04:38,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:04:38,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:04:38,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:04:38,632 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:04:38,647 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:04:38,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:04:38,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:04:38,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:04:38,648 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:04:38,648 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:04:38,648 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:04:38,649 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:04:38,649 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:04:38,649 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:04:38,649 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:04:38,649 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:04:38,649 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:04:38,649 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:04:38,649 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:04:38,649 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:04:38,650 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:04:38,650 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:04:38,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:04:38,650 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:04:38,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:04:38,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:04:38,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:04:38,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:04:38,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:04:38,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:04:38,651 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:04:38,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:04:38,651 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:04:38,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:04:38,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:04:38,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:04:38,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:04:38,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:04:38,652 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:04:38,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:04:38,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:04:38,653 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:04:38,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:04:38,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:04:38,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:04:38,653 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_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d0fbec14d1477738cb6d25ea9b61fc7005f787f2c8a0ac2c555d7e4fa1dbf47 [2022-12-14 13:04:38,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:04:38,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:04:38,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:04:38,829 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:04:38,830 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:04:38,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/token_ring.06.cil-2.c [2022-12-14 13:04:41,461 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:04:41,620 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:04:41,621 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/sv-benchmarks/c/systemc/token_ring.06.cil-2.c [2022-12-14 13:04:41,628 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/data/2514cd725/86c960880ea0409bb004dade8d6c7672/FLAG1a2d65b49 [2022-12-14 13:04:41,638 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/data/2514cd725/86c960880ea0409bb004dade8d6c7672 [2022-12-14 13:04:41,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:04:41,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:04:41,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:04:41,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:04:41,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:04:41,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:04:41" (1/1) ... [2022-12-14 13:04:41,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c1b5c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:04:41, skipping insertion in model container [2022-12-14 13:04:41,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:04:41" (1/1) ... [2022-12-14 13:04:41,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:04:41,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:04:41,763 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/sv-benchmarks/c/systemc/token_ring.06.cil-2.c[671,684] [2022-12-14 13:04:41,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:04:41,824 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:04:41,832 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/sv-benchmarks/c/systemc/token_ring.06.cil-2.c[671,684] [2022-12-14 13:04:41,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:04:41,874 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:04:41,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:04:41 WrapperNode [2022-12-14 13:04:41,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:04:41,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:04:41,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:04:41,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:04:41,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:04:41" (1/1) ... [2022-12-14 13:04:41,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:04:41" (1/1) ... [2022-12-14 13:04:41,909 INFO L138 Inliner]: procedures = 40, calls = 49, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 505 [2022-12-14 13:04:41,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:04:41,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:04:41,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:04:41,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:04:41,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:04:41" (1/1) ... [2022-12-14 13:04:41,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:04:41" (1/1) ... [2022-12-14 13:04:41,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:04:41" (1/1) ... [2022-12-14 13:04:41,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:04:41" (1/1) ... [2022-12-14 13:04:41,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:04:41" (1/1) ... [2022-12-14 13:04:41,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:04:41" (1/1) ... [2022-12-14 13:04:41,932 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:04:41" (1/1) ... [2022-12-14 13:04:41,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:04:41" (1/1) ... [2022-12-14 13:04:41,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:04:41,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:04:41,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:04:41,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:04:41,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:04:41" (1/1) ... [2022-12-14 13:04:41,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:04:41,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:41,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:04:41,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:04:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:04:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 13:04:41,986 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 13:04:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 13:04:41,986 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 13:04:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 13:04:41,986 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 13:04:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 13:04:41,986 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 13:04:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 13:04:41,986 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 13:04:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:04:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 13:04:41,987 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 13:04:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:04:41,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:04:42,061 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:04:42,062 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:04:42,492 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:04:42,714 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:04:42,714 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-12-14 13:04:42,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:04:42 BoogieIcfgContainer [2022-12-14 13:04:42,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:04:42,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:04:42,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:04:42,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:04:42,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:04:41" (1/3) ... [2022-12-14 13:04:42,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@778119f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:04:42, skipping insertion in model container [2022-12-14 13:04:42,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:04:41" (2/3) ... [2022-12-14 13:04:42,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@778119f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:04:42, skipping insertion in model container [2022-12-14 13:04:42,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:04:42" (3/3) ... [2022-12-14 13:04:42,723 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.06.cil-2.c [2022-12-14 13:04:42,738 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:04:42,739 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:04:42,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:04:42,788 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;@70b936d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:04:42,788 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:04:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 94 states have (on average 1.5319148936170213) internal successors, (144), 96 states have internal predecessors, (144), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 13:04:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 13:04:42,799 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:42,799 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] [2022-12-14 13:04:42,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:42,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:42,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1275949477, now seen corresponding path program 1 times [2022-12-14 13:04:42,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:42,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642890173] [2022-12-14 13:04:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:42,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:04:43,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:43,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642890173] [2022-12-14 13:04:43,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642890173] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:04:43,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:04:43,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:04:43,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845140953] [2022-12-14 13:04:43,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:04:43,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:04:43,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:04:43,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:04:43,132 INFO L87 Difference]: Start difference. First operand has 122 states, 94 states have (on average 1.5319148936170213) internal successors, (144), 96 states have internal predecessors, (144), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:04:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:43,409 INFO L93 Difference]: Finished difference Result 350 states and 538 transitions. [2022-12-14 13:04:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:04:43,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 48 [2022-12-14 13:04:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:43,418 INFO L225 Difference]: With dead ends: 350 [2022-12-14 13:04:43,419 INFO L226 Difference]: Without dead ends: 229 [2022-12-14 13:04:43,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:04:43,424 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 314 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:43,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 474 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:04:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-12-14 13:04:43,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-12-14 13:04:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 179 states have (on average 1.4748603351955307) internal successors, (264), 181 states have internal predecessors, (264), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2022-12-14 13:04:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 336 transitions. [2022-12-14 13:04:43,469 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 336 transitions. Word has length 48 [2022-12-14 13:04:43,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:43,469 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 336 transitions. [2022-12-14 13:04:43,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:04:43,470 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 336 transitions. [2022-12-14 13:04:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 13:04:43,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:43,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:04:43,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:04:43,473 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:43,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:43,474 INFO L85 PathProgramCache]: Analyzing trace with hash 119319692, now seen corresponding path program 1 times [2022-12-14 13:04:43,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:43,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954889165] [2022-12-14 13:04:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:43,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:04:43,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:43,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954889165] [2022-12-14 13:04:43,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954889165] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:43,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451858402] [2022-12-14 13:04:43,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:43,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:43,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:43,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:43,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:04:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:43,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:04:43,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:04:43,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:04:43,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451858402] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:04:43,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:04:43,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 13:04:43,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740846557] [2022-12-14 13:04:43,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:04:43,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:04:43,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:43,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:04:43,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:04:43,773 INFO L87 Difference]: Start difference. First operand 228 states and 336 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:04:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:43,895 INFO L93 Difference]: Finished difference Result 667 states and 999 transitions. [2022-12-14 13:04:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:04:43,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 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 93 [2022-12-14 13:04:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:43,901 INFO L225 Difference]: With dead ends: 667 [2022-12-14 13:04:43,901 INFO L226 Difference]: Without dead ends: 444 [2022-12-14 13:04:43,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:04:43,904 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 151 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:43,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 322 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:04:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-12-14 13:04:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 440. [2022-12-14 13:04:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 349 states have (on average 1.4699140401146131) internal successors, (513), 352 states have internal predecessors, (513), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2022-12-14 13:04:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 645 transitions. [2022-12-14 13:04:43,952 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 645 transitions. Word has length 93 [2022-12-14 13:04:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:43,952 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 645 transitions. [2022-12-14 13:04:43,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:04:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 645 transitions. [2022-12-14 13:04:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 13:04:43,958 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:43,958 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:04:43,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-14 13:04:44,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:44,161 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:44,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:44,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1457078932, now seen corresponding path program 1 times [2022-12-14 13:04:44,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:44,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873059728] [2022-12-14 13:04:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:44,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:04:44,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:44,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873059728] [2022-12-14 13:04:44,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873059728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:44,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123956389] [2022-12-14 13:04:44,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:44,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:44,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:44,348 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:44,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:04:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:44,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:04:44,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:04:44,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:04:44,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123956389] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:04:44,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:04:44,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 13:04:44,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347409869] [2022-12-14 13:04:44,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:04:44,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:04:44,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:44,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:04:44,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:04:44,496 INFO L87 Difference]: Start difference. First operand 440 states and 645 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:04:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:44,606 INFO L93 Difference]: Finished difference Result 1297 states and 1932 transitions. [2022-12-14 13:04:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:04:44,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 93 [2022-12-14 13:04:44,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:44,609 INFO L225 Difference]: With dead ends: 1297 [2022-12-14 13:04:44,610 INFO L226 Difference]: Without dead ends: 862 [2022-12-14 13:04:44,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:04:44,612 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 154 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:44,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 321 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:04:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-12-14 13:04:44,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 856. [2022-12-14 13:04:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 683 states have (on average 1.4626647144948755) internal successors, (999), 688 states have internal predecessors, (999), 124 states have call successors, (124), 48 states have call predecessors, (124), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2022-12-14 13:04:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1247 transitions. [2022-12-14 13:04:44,656 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1247 transitions. Word has length 93 [2022-12-14 13:04:44,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:44,657 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1247 transitions. [2022-12-14 13:04:44,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:04:44,657 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1247 transitions. [2022-12-14 13:04:44,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 13:04:44,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:44,662 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:04:44,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:04:44,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:44,863 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1518895244, now seen corresponding path program 1 times [2022-12-14 13:04:44,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:44,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937140572] [2022-12-14 13:04:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:44,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 13:04:44,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:44,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937140572] [2022-12-14 13:04:44,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937140572] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:44,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582946808] [2022-12-14 13:04:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:44,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:44,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:44,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:44,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:04:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:45,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:04:45,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:04:45,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:04:45,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582946808] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:04:45,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:04:45,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-12-14 13:04:45,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814483247] [2022-12-14 13:04:45,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:04:45,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:04:45,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:45,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:04:45,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:04:45,110 INFO L87 Difference]: Start difference. First operand 856 states and 1247 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:04:45,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:45,217 INFO L93 Difference]: Finished difference Result 2533 states and 3748 transitions. [2022-12-14 13:04:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:04:45,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 93 [2022-12-14 13:04:45,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:45,225 INFO L225 Difference]: With dead ends: 2533 [2022-12-14 13:04:45,225 INFO L226 Difference]: Without dead ends: 1682 [2022-12-14 13:04:45,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:04:45,228 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 145 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:45,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 296 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:04:45,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-12-14 13:04:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1672. [2022-12-14 13:04:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1339 states have (on average 1.4540702016430171) internal successors, (1947), 1348 states have internal predecessors, (1947), 236 states have call successors, (236), 96 states have call predecessors, (236), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2022-12-14 13:04:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2419 transitions. [2022-12-14 13:04:45,314 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2419 transitions. Word has length 93 [2022-12-14 13:04:45,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:45,314 INFO L495 AbstractCegarLoop]: Abstraction has 1672 states and 2419 transitions. [2022-12-14 13:04:45,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:04:45,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2419 transitions. [2022-12-14 13:04:45,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 13:04:45,317 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:45,317 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:04:45,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:04:45,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:45,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:45,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:45,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1909933716, now seen corresponding path program 1 times [2022-12-14 13:04:45,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:45,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338196853] [2022-12-14 13:04:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:45,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 13:04:45,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:45,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338196853] [2022-12-14 13:04:45,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338196853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:04:45,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:04:45,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:04:45,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936877066] [2022-12-14 13:04:45,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:04:45,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:04:45,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:45,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:04:45,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:04:45,708 INFO L87 Difference]: Start difference. First operand 1672 states and 2419 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 13:04:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:45,830 INFO L93 Difference]: Finished difference Result 2962 states and 4356 transitions. [2022-12-14 13:04:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:04:45,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 93 [2022-12-14 13:04:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:45,838 INFO L225 Difference]: With dead ends: 2962 [2022-12-14 13:04:45,838 INFO L226 Difference]: Without dead ends: 2112 [2022-12-14 13:04:45,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:04:45,841 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 74 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:45,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 375 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:04:45,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2022-12-14 13:04:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1956. [2022-12-14 13:04:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1607 states have (on average 1.4953329184816428) internal successors, (2403), 1616 states have internal predecessors, (2403), 244 states have call successors, (244), 104 states have call predecessors, (244), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2022-12-14 13:04:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 2891 transitions. [2022-12-14 13:04:45,916 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 2891 transitions. Word has length 93 [2022-12-14 13:04:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:45,916 INFO L495 AbstractCegarLoop]: Abstraction has 1956 states and 2891 transitions. [2022-12-14 13:04:45,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 13:04:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 2891 transitions. [2022-12-14 13:04:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 13:04:45,921 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:45,921 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:04:45,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:04:45,921 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:45,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:45,922 INFO L85 PathProgramCache]: Analyzing trace with hash -2119612042, now seen corresponding path program 1 times [2022-12-14 13:04:45,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:45,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917490506] [2022-12-14 13:04:45,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:45,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 13:04:45,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:45,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917490506] [2022-12-14 13:04:45,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917490506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:04:45,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:04:45,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:04:45,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377019794] [2022-12-14 13:04:45,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:04:45,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:04:45,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:45,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:04:45,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:04:45,988 INFO L87 Difference]: Start difference. First operand 1956 states and 2891 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:04:46,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:46,186 INFO L93 Difference]: Finished difference Result 5785 states and 8648 transitions. [2022-12-14 13:04:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:04:46,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 125 [2022-12-14 13:04:46,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:46,198 INFO L225 Difference]: With dead ends: 5785 [2022-12-14 13:04:46,199 INFO L226 Difference]: Without dead ends: 3834 [2022-12-14 13:04:46,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:04:46,204 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 143 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:46,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 298 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:04:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2022-12-14 13:04:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3808. [2022-12-14 13:04:46,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3131 states have (on average 1.4829128074097733) internal successors, (4643), 3148 states have internal predecessors, (4643), 468 states have call successors, (468), 208 states have call predecessors, (468), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2022-12-14 13:04:46,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 5579 transitions. [2022-12-14 13:04:46,335 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 5579 transitions. Word has length 125 [2022-12-14 13:04:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:46,335 INFO L495 AbstractCegarLoop]: Abstraction has 3808 states and 5579 transitions. [2022-12-14 13:04:46,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:04:46,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 5579 transitions. [2022-12-14 13:04:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 13:04:46,343 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:46,343 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:04:46,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:04:46,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:46,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:46,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1022566835, now seen corresponding path program 1 times [2022-12-14 13:04:46,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:46,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3605027] [2022-12-14 13:04:46,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:46,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 13:04:46,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:46,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3605027] [2022-12-14 13:04:46,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3605027] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:04:46,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:04:46,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:04:46,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647855900] [2022-12-14 13:04:46,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:04:46,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:04:46,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:46,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:04:46,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:04:46,408 INFO L87 Difference]: Start difference. First operand 3808 states and 5579 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:04:46,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:46,720 INFO L93 Difference]: Finished difference Result 11269 states and 16688 transitions. [2022-12-14 13:04:46,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:04:46,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 125 [2022-12-14 13:04:46,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:46,742 INFO L225 Difference]: With dead ends: 11269 [2022-12-14 13:04:46,742 INFO L226 Difference]: Without dead ends: 7466 [2022-12-14 13:04:46,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:04:46,750 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 145 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:46,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 298 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:04:46,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7466 states. [2022-12-14 13:04:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7466 to 7416. [2022-12-14 13:04:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 6099 states have (on average 1.469585177898016) internal successors, (8963), 6132 states have internal predecessors, (8963), 900 states have call successors, (900), 416 states have call predecessors, (900), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2022-12-14 13:04:47,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 10763 transitions. [2022-12-14 13:04:47,013 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 10763 transitions. Word has length 125 [2022-12-14 13:04:47,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:47,013 INFO L495 AbstractCegarLoop]: Abstraction has 7416 states and 10763 transitions. [2022-12-14 13:04:47,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:04:47,014 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 10763 transitions. [2022-12-14 13:04:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 13:04:47,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:47,027 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:04:47,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:04:47,028 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:47,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1160543628, now seen corresponding path program 1 times [2022-12-14 13:04:47,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:47,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667153724] [2022-12-14 13:04:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:47,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 13:04:47,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:47,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667153724] [2022-12-14 13:04:47,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667153724] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:04:47,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:04:47,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:04:47,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486681296] [2022-12-14 13:04:47,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:04:47,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:04:47,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:47,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:04:47,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:04:47,086 INFO L87 Difference]: Start difference. First operand 7416 states and 10763 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:04:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:47,527 INFO L93 Difference]: Finished difference Result 21949 states and 32176 transitions. [2022-12-14 13:04:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:04:47,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 125 [2022-12-14 13:04:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:47,585 INFO L225 Difference]: With dead ends: 21949 [2022-12-14 13:04:47,585 INFO L226 Difference]: Without dead ends: 14538 [2022-12-14 13:04:47,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:04:47,607 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 148 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:47,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 305 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:04:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14538 states. [2022-12-14 13:04:48,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14538 to 14440. [2022-12-14 13:04:48,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14440 states, 11875 states have (on average 1.4554105263157895) internal successors, (17283), 11940 states have internal predecessors, (17283), 1732 states have call successors, (1732), 832 states have call predecessors, (1732), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2022-12-14 13:04:48,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14440 states to 14440 states and 20747 transitions. [2022-12-14 13:04:48,210 INFO L78 Accepts]: Start accepts. Automaton has 14440 states and 20747 transitions. Word has length 125 [2022-12-14 13:04:48,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:48,211 INFO L495 AbstractCegarLoop]: Abstraction has 14440 states and 20747 transitions. [2022-12-14 13:04:48,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:04:48,211 INFO L276 IsEmpty]: Start isEmpty. Operand 14440 states and 20747 transitions. [2022-12-14 13:04:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:04:48,245 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:48,245 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 13:04:48,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 13:04:48,245 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:48,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:48,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1487643361, now seen corresponding path program 1 times [2022-12-14 13:04:48,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:48,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233116254] [2022-12-14 13:04:48,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:48,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 13:04:48,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:48,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233116254] [2022-12-14 13:04:48,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233116254] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:04:48,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:04:48,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:04:48,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323559961] [2022-12-14 13:04:48,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:04:48,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:04:48,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:48,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:04:48,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:04:48,303 INFO L87 Difference]: Start difference. First operand 14440 states and 20747 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:04:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:49,137 INFO L93 Difference]: Finished difference Result 37932 states and 55501 transitions. [2022-12-14 13:04:49,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:04:49,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 144 [2022-12-14 13:04:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:49,197 INFO L225 Difference]: With dead ends: 37932 [2022-12-14 13:04:49,197 INFO L226 Difference]: Without dead ends: 23498 [2022-12-14 13:04:49,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:04:49,222 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 84 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:49,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 336 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:04:49,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23498 states. [2022-12-14 13:04:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23498 to 20240. [2022-12-14 13:04:49,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20240 states, 17287 states have (on average 1.522010759530283) internal successors, (26311), 17353 states have internal predecessors, (26311), 1926 states have call successors, (1926), 1026 states have call predecessors, (1926), 1026 states have return successors, (1926), 1861 states have call predecessors, (1926), 1926 states have call successors, (1926) [2022-12-14 13:04:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20240 states to 20240 states and 30163 transitions. [2022-12-14 13:04:49,933 INFO L78 Accepts]: Start accepts. Automaton has 20240 states and 30163 transitions. Word has length 144 [2022-12-14 13:04:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:49,934 INFO L495 AbstractCegarLoop]: Abstraction has 20240 states and 30163 transitions. [2022-12-14 13:04:49,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:04:49,935 INFO L276 IsEmpty]: Start isEmpty. Operand 20240 states and 30163 transitions. [2022-12-14 13:04:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:04:49,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:49,976 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 13:04:49,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 13:04:49,976 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:49,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:49,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1911508741, now seen corresponding path program 2 times [2022-12-14 13:04:49,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:49,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989719797] [2022-12-14 13:04:49,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:49,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 13:04:50,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:50,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989719797] [2022-12-14 13:04:50,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989719797] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:50,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188785893] [2022-12-14 13:04:50,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:04:50,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:50,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:50,082 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:50,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:04:50,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:04:50,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:04:50,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:04:50,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 13:04:50,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:04:50,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188785893] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:04:50,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:04:50,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:04:50,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363553612] [2022-12-14 13:04:50,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:04:50,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:04:50,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:50,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:04:50,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:04:50,218 INFO L87 Difference]: Start difference. First operand 20240 states and 30163 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:04:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:51,064 INFO L93 Difference]: Finished difference Result 30708 states and 46357 transitions. [2022-12-14 13:04:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:04:51,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 144 [2022-12-14 13:04:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:51,117 INFO L225 Difference]: With dead ends: 30708 [2022-12-14 13:04:51,117 INFO L226 Difference]: Without dead ends: 20306 [2022-12-14 13:04:51,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:04:51,139 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 142 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:51,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 412 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:04:51,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20306 states. [2022-12-14 13:04:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20306 to 19984. [2022-12-14 13:04:51,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19984 states, 17031 states have (on average 1.503552345722506) internal successors, (25607), 17097 states have internal predecessors, (25607), 1926 states have call successors, (1926), 1026 states have call predecessors, (1926), 1026 states have return successors, (1926), 1861 states have call predecessors, (1926), 1926 states have call successors, (1926) [2022-12-14 13:04:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19984 states to 19984 states and 29459 transitions. [2022-12-14 13:04:51,873 INFO L78 Accepts]: Start accepts. Automaton has 19984 states and 29459 transitions. Word has length 144 [2022-12-14 13:04:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:51,873 INFO L495 AbstractCegarLoop]: Abstraction has 19984 states and 29459 transitions. [2022-12-14 13:04:51,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:04:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 19984 states and 29459 transitions. [2022-12-14 13:04:51,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:04:51,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:51,901 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:04:51,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:04:52,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 13:04:52,102 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:52,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1250174950, now seen corresponding path program 1 times [2022-12-14 13:04:52,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:52,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509440836] [2022-12-14 13:04:52,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:52,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 13:04:52,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:52,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509440836] [2022-12-14 13:04:52,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509440836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:52,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693793731] [2022-12-14 13:04:52,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:52,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:52,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:52,190 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:52,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:04:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:52,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:04:52,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 13:04:52,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:04:52,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693793731] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:04:52,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:04:52,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:04:52,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061399016] [2022-12-14 13:04:52,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:04:52,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:04:52,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:52,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:04:52,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:04:52,330 INFO L87 Difference]: Start difference. First operand 19984 states and 29459 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:04:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:53,113 INFO L93 Difference]: Finished difference Result 38260 states and 56949 transitions. [2022-12-14 13:04:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:04:53,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 144 [2022-12-14 13:04:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:53,185 INFO L225 Difference]: With dead ends: 38260 [2022-12-14 13:04:53,185 INFO L226 Difference]: Without dead ends: 28242 [2022-12-14 13:04:53,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:04:53,207 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 110 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:53,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 404 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:04:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28242 states. [2022-12-14 13:04:54,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28242 to 25488. [2022-12-14 13:04:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25488 states, 22151 states have (on average 1.5374023746106271) internal successors, (34055), 22217 states have internal predecessors, (34055), 2118 states have call successors, (2118), 1218 states have call predecessors, (2118), 1218 states have return successors, (2118), 2053 states have call predecessors, (2118), 2118 states have call successors, (2118) [2022-12-14 13:04:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25488 states to 25488 states and 38291 transitions. [2022-12-14 13:04:54,119 INFO L78 Accepts]: Start accepts. Automaton has 25488 states and 38291 transitions. Word has length 144 [2022-12-14 13:04:54,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:54,120 INFO L495 AbstractCegarLoop]: Abstraction has 25488 states and 38291 transitions. [2022-12-14 13:04:54,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:04:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 25488 states and 38291 transitions. [2022-12-14 13:04:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:04:54,159 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:54,159 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:04:54,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:04:54,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 13:04:54,360 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:54,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:54,361 INFO L85 PathProgramCache]: Analyzing trace with hash -78588415, now seen corresponding path program 2 times [2022-12-14 13:04:54,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:54,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890024538] [2022-12-14 13:04:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:54,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 13:04:54,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:54,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890024538] [2022-12-14 13:04:54,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890024538] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:54,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600947212] [2022-12-14 13:04:54,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:04:54,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:54,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:54,603 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:54,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:04:54,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:04:54,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:04:54,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:04:54,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 13:04:54,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:04:54,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600947212] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:04:54,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:04:54,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:04:54,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234332320] [2022-12-14 13:04:54,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:04:54,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:04:54,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:54,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:04:54,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:04:54,750 INFO L87 Difference]: Start difference. First operand 25488 states and 38291 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:04:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:55,869 INFO L93 Difference]: Finished difference Result 38532 states and 58453 transitions. [2022-12-14 13:04:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:04:55,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 144 [2022-12-14 13:04:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:55,931 INFO L225 Difference]: With dead ends: 38532 [2022-12-14 13:04:55,932 INFO L226 Difference]: Without dead ends: 25554 [2022-12-14 13:04:55,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:04:55,961 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 149 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:55,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 405 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:04:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25554 states. [2022-12-14 13:04:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25554 to 25328. [2022-12-14 13:04:56,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25328 states, 21991 states have (on average 1.5253058069210133) internal successors, (33543), 22057 states have internal predecessors, (33543), 2118 states have call successors, (2118), 1218 states have call predecessors, (2118), 1218 states have return successors, (2118), 2053 states have call predecessors, (2118), 2118 states have call successors, (2118) [2022-12-14 13:04:56,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25328 states to 25328 states and 37779 transitions. [2022-12-14 13:04:56,918 INFO L78 Accepts]: Start accepts. Automaton has 25328 states and 37779 transitions. Word has length 144 [2022-12-14 13:04:56,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:56,919 INFO L495 AbstractCegarLoop]: Abstraction has 25328 states and 37779 transitions. [2022-12-14 13:04:56,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:04:56,919 INFO L276 IsEmpty]: Start isEmpty. Operand 25328 states and 37779 transitions. [2022-12-14 13:04:56,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:04:56,949 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:56,949 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:04:56,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 13:04:57,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:57,150 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:57,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:57,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1130037504, now seen corresponding path program 1 times [2022-12-14 13:04:57,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:57,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137848401] [2022-12-14 13:04:57,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:57,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:04:57,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:57,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137848401] [2022-12-14 13:04:57,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137848401] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:57,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228111593] [2022-12-14 13:04:57,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:57,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:57,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:57,317 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:57,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:04:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:57,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:04:57,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 13:04:57,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:04:57,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228111593] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:04:57,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:04:57,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:04:57,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251512118] [2022-12-14 13:04:57,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:04:57,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:04:57,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:57,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:04:57,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:04:57,489 INFO L87 Difference]: Start difference. First operand 25328 states and 37779 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:04:58,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:04:58,309 INFO L93 Difference]: Finished difference Result 41836 states and 61630 transitions. [2022-12-14 13:04:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:04:58,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 144 [2022-12-14 13:04:58,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:04:58,358 INFO L225 Difference]: With dead ends: 41836 [2022-12-14 13:04:58,358 INFO L226 Difference]: Without dead ends: 29098 [2022-12-14 13:04:58,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:04:58,378 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 147 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:04:58,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 205 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:04:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29098 states. [2022-12-14 13:04:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29098 to 29098. [2022-12-14 13:04:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29098 states, 25381 states have (on average 1.4828808951577952) internal successors, (37637), 25447 states have internal predecessors, (37637), 2244 states have call successors, (2244), 1472 states have call predecessors, (2244), 1472 states have return successors, (2244), 2179 states have call predecessors, (2244), 2244 states have call successors, (2244) [2022-12-14 13:04:59,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29098 states to 29098 states and 42125 transitions. [2022-12-14 13:04:59,257 INFO L78 Accepts]: Start accepts. Automaton has 29098 states and 42125 transitions. Word has length 144 [2022-12-14 13:04:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:04:59,257 INFO L495 AbstractCegarLoop]: Abstraction has 29098 states and 42125 transitions. [2022-12-14 13:04:59,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:04:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 29098 states and 42125 transitions. [2022-12-14 13:04:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 13:04:59,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:04:59,290 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:04:59,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:04:59,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 13:04:59,491 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:04:59,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:04:59,493 INFO L85 PathProgramCache]: Analyzing trace with hash 821912671, now seen corresponding path program 1 times [2022-12-14 13:04:59,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:04:59,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833747680] [2022-12-14 13:04:59,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:59,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:04:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 13:04:59,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:04:59,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833747680] [2022-12-14 13:04:59,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833747680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:04:59,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145110221] [2022-12-14 13:04:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:04:59,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:04:59,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:04:59,704 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:04:59,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:04:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:04:59,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:04:59,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:04:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:04:59,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:04:59,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145110221] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:04:59,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:04:59,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:04:59,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116736583] [2022-12-14 13:04:59,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:04:59,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:04:59,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:04:59,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:04:59,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:04:59,865 INFO L87 Difference]: Start difference. First operand 29098 states and 42125 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:05:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:01,215 INFO L93 Difference]: Finished difference Result 71764 states and 105428 transitions. [2022-12-14 13:05:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:01,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 144 [2022-12-14 13:05:01,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:01,312 INFO L225 Difference]: With dead ends: 71764 [2022-12-14 13:05:01,313 INFO L226 Difference]: Without dead ends: 42672 [2022-12-14 13:05:01,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:05:01,351 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 73 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:01,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 311 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:05:01,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42672 states. [2022-12-14 13:05:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42672 to 34634. [2022-12-14 13:05:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34634 states, 30533 states have (on average 1.5072544460092359) internal successors, (46021), 30599 states have internal predecessors, (46021), 2436 states have call successors, (2436), 1664 states have call predecessors, (2436), 1664 states have return successors, (2436), 2371 states have call predecessors, (2436), 2436 states have call successors, (2436) [2022-12-14 13:05:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34634 states to 34634 states and 50893 transitions. [2022-12-14 13:05:03,049 INFO L78 Accepts]: Start accepts. Automaton has 34634 states and 50893 transitions. Word has length 144 [2022-12-14 13:05:03,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:03,049 INFO L495 AbstractCegarLoop]: Abstraction has 34634 states and 50893 transitions. [2022-12-14 13:05:03,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:05:03,049 INFO L276 IsEmpty]: Start isEmpty. Operand 34634 states and 50893 transitions. [2022-12-14 13:05:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 13:05:03,090 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:03,090 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:03,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:05:03,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:05:03,294 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:03,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:03,295 INFO L85 PathProgramCache]: Analyzing trace with hash -876807545, now seen corresponding path program 1 times [2022-12-14 13:05:03,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:03,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129466607] [2022-12-14 13:05:03,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:03,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:05:03,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:03,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129466607] [2022-12-14 13:05:03,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129466607] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:03,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164398138] [2022-12-14 13:05:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:03,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:03,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:03,443 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:03,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:05:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:03,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:05:03,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 13:05:03,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:03,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164398138] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:03,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:03,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 13:05:03,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634727071] [2022-12-14 13:05:03,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:03,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:05:03,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:03,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:05:03,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:05:03,627 INFO L87 Difference]: Start difference. First operand 34634 states and 50893 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:05:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:05,936 INFO L93 Difference]: Finished difference Result 103376 states and 151277 transitions. [2022-12-14 13:05:05,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:05:05,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 145 [2022-12-14 13:05:05,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:06,104 INFO L225 Difference]: With dead ends: 103376 [2022-12-14 13:05:06,104 INFO L226 Difference]: Without dead ends: 68748 [2022-12-14 13:05:06,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:05:06,161 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 170 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:06,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 709 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:05:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68748 states. [2022-12-14 13:05:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68748 to 68482. [2022-12-14 13:05:08,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68482 states, 60227 states have (on average 1.4771281983163698) internal successors, (88963), 60486 states have internal predecessors, (88963), 4801 states have call successors, (4801), 3325 states have call predecessors, (4801), 3453 states have return successors, (5597), 4671 states have call predecessors, (5597), 4801 states have call successors, (5597) [2022-12-14 13:05:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68482 states to 68482 states and 99361 transitions. [2022-12-14 13:05:08,677 INFO L78 Accepts]: Start accepts. Automaton has 68482 states and 99361 transitions. Word has length 145 [2022-12-14 13:05:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:08,677 INFO L495 AbstractCegarLoop]: Abstraction has 68482 states and 99361 transitions. [2022-12-14 13:05:08,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:05:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 68482 states and 99361 transitions. [2022-12-14 13:05:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 13:05:08,770 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:08,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:08,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:05:08,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 13:05:08,972 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:08,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:08,973 INFO L85 PathProgramCache]: Analyzing trace with hash 29948902, now seen corresponding path program 2 times [2022-12-14 13:05:08,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:08,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051431367] [2022-12-14 13:05:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:08,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 13:05:09,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:09,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051431367] [2022-12-14 13:05:09,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051431367] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:09,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114963887] [2022-12-14 13:05:09,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:05:09,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:09,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:09,148 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:09,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:05:09,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:05:09,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:05:09,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:05:09,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 13:05:09,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:09,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114963887] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:09,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:09,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:05:09,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296214170] [2022-12-14 13:05:09,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:09,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:09,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:09,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:09,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:05:09,295 INFO L87 Difference]: Start difference. First operand 68482 states and 99361 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:05:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:12,731 INFO L93 Difference]: Finished difference Result 137080 states and 202181 transitions. [2022-12-14 13:05:12,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:12,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2022-12-14 13:05:12,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:12,960 INFO L225 Difference]: With dead ends: 137080 [2022-12-14 13:05:12,960 INFO L226 Difference]: Without dead ends: 101436 [2022-12-14 13:05:13,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:05:13,025 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 138 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:13,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 308 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:05:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101436 states. [2022-12-14 13:05:16,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101436 to 100534. [2022-12-14 13:05:16,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100534 states, 88255 states have (on average 1.4764375956036486) internal successors, (130303), 88578 states have internal predecessors, (130303), 7165 states have call successors, (7165), 4985 states have call predecessors, (7165), 5113 states have return successors, (8981), 6971 states have call predecessors, (8981), 7165 states have call successors, (8981) [2022-12-14 13:05:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100534 states to 100534 states and 146449 transitions. [2022-12-14 13:05:16,791 INFO L78 Accepts]: Start accepts. Automaton has 100534 states and 146449 transitions. Word has length 145 [2022-12-14 13:05:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:16,791 INFO L495 AbstractCegarLoop]: Abstraction has 100534 states and 146449 transitions. [2022-12-14 13:05:16,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:05:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 100534 states and 146449 transitions. [2022-12-14 13:05:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 13:05:16,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:16,929 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:16,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 13:05:17,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:05:17,131 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:17,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:17,132 INFO L85 PathProgramCache]: Analyzing trace with hash 299936858, now seen corresponding path program 3 times [2022-12-14 13:05:17,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:17,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439393525] [2022-12-14 13:05:17,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:17,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 13:05:17,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:17,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439393525] [2022-12-14 13:05:17,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439393525] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:17,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739778579] [2022-12-14 13:05:17,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:05:17,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:17,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:17,279 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:17,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:05:17,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:05:17,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:05:17,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:05:17,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:05:17,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:17,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739778579] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:17,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:17,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:05:17,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679393060] [2022-12-14 13:05:17,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:17,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:17,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:17,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:17,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:05:17,440 INFO L87 Difference]: Start difference. First operand 100534 states and 146449 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:05:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:21,502 INFO L93 Difference]: Finished difference Result 176560 states and 255932 transitions. [2022-12-14 13:05:21,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:21,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2022-12-14 13:05:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:21,760 INFO L225 Difference]: With dead ends: 176560 [2022-12-14 13:05:21,760 INFO L226 Difference]: Without dead ends: 108096 [2022-12-14 13:05:21,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:05:21,844 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 103 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:21,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 217 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:05:21,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108096 states. [2022-12-14 13:05:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108096 to 107936. [2022-12-14 13:05:25,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107936 states, 95129 states have (on average 1.453111038694825) internal successors, (138233), 95260 states have internal predecessors, (138233), 7347 states have call successors, (7347), 5551 states have call predecessors, (7347), 5459 states have return successors, (8685), 7125 states have call predecessors, (8685), 7347 states have call successors, (8685) [2022-12-14 13:05:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107936 states to 107936 states and 154265 transitions. [2022-12-14 13:05:26,131 INFO L78 Accepts]: Start accepts. Automaton has 107936 states and 154265 transitions. Word has length 145 [2022-12-14 13:05:26,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:26,132 INFO L495 AbstractCegarLoop]: Abstraction has 107936 states and 154265 transitions. [2022-12-14 13:05:26,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:05:26,132 INFO L276 IsEmpty]: Start isEmpty. Operand 107936 states and 154265 transitions. [2022-12-14 13:05:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 13:05:26,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:26,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:26,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:05:26,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 13:05:26,475 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1218911481, now seen corresponding path program 1 times [2022-12-14 13:05:26,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:26,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019941799] [2022-12-14 13:05:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:26,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:05:26,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:26,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019941799] [2022-12-14 13:05:26,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019941799] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:26,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569550740] [2022-12-14 13:05:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:26,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:26,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:26,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:26,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:05:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:26,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:05:26,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 13:05:26,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:26,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569550740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:26,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:26,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:05:26,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025966102] [2022-12-14 13:05:26,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:26,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:26,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:26,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:26,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:05:26,747 INFO L87 Difference]: Start difference. First operand 107936 states and 154265 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:05:29,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:29,500 INFO L93 Difference]: Finished difference Result 144796 states and 208525 transitions. [2022-12-14 13:05:29,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:29,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2022-12-14 13:05:29,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:29,663 INFO L225 Difference]: With dead ends: 144796 [2022-12-14 13:05:29,664 INFO L226 Difference]: Without dead ends: 72438 [2022-12-14 13:05:29,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:05:29,771 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 146 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:29,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 407 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:05:29,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72438 states. [2022-12-14 13:05:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72438 to 71732. [2022-12-14 13:05:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71732 states, 63199 states have (on average 1.4440576591401764) internal successors, (91263), 63266 states have internal predecessors, (91263), 4923 states have call successors, (4923), 3703 states have call predecessors, (4923), 3609 states have return successors, (5179), 4763 states have call predecessors, (5179), 4923 states have call successors, (5179) [2022-12-14 13:05:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71732 states to 71732 states and 101365 transitions. [2022-12-14 13:05:33,014 INFO L78 Accepts]: Start accepts. Automaton has 71732 states and 101365 transitions. Word has length 145 [2022-12-14 13:05:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:33,015 INFO L495 AbstractCegarLoop]: Abstraction has 71732 states and 101365 transitions. [2022-12-14 13:05:33,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:05:33,015 INFO L276 IsEmpty]: Start isEmpty. Operand 71732 states and 101365 transitions. [2022-12-14 13:05:33,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 13:05:33,109 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:33,109 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:33,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:05:33,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:05:33,310 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:33,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:33,311 INFO L85 PathProgramCache]: Analyzing trace with hash -467780670, now seen corresponding path program 1 times [2022-12-14 13:05:33,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:33,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800016745] [2022-12-14 13:05:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:33,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:05:33,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:33,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800016745] [2022-12-14 13:05:33,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800016745] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:33,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316583037] [2022-12-14 13:05:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:33,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:33,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:33,466 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:33,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:05:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:33,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:05:33,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 13:05:33,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:33,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316583037] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:33,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:33,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 13:05:33,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211296550] [2022-12-14 13:05:33,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:33,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:05:33,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:33,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:05:33,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:05:33,665 INFO L87 Difference]: Start difference. First operand 71732 states and 101365 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:05:38,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:38,434 INFO L93 Difference]: Finished difference Result 177044 states and 249871 transitions. [2022-12-14 13:05:38,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:05:38,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 13:05:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:38,667 INFO L225 Difference]: With dead ends: 177044 [2022-12-14 13:05:38,667 INFO L226 Difference]: Without dead ends: 105318 [2022-12-14 13:05:38,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:05:38,740 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 457 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:38,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 398 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:05:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105318 states. [2022-12-14 13:05:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105318 to 105316. [2022-12-14 13:05:43,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105316 states, 92597 states have (on average 1.425240558549413) internal successors, (131973), 92696 states have internal predecessors, (131973), 7311 states have call successors, (7311), 5547 states have call predecessors, (7311), 5407 states have return successors, (7695), 7073 states have call predecessors, (7695), 7311 states have call successors, (7695) [2022-12-14 13:05:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105316 states to 105316 states and 146979 transitions. [2022-12-14 13:05:43,286 INFO L78 Accepts]: Start accepts. Automaton has 105316 states and 146979 transitions. Word has length 146 [2022-12-14 13:05:43,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:43,286 INFO L495 AbstractCegarLoop]: Abstraction has 105316 states and 146979 transitions. [2022-12-14 13:05:43,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:05:43,287 INFO L276 IsEmpty]: Start isEmpty. Operand 105316 states and 146979 transitions. [2022-12-14 13:05:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 13:05:43,416 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:43,417 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:43,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 13:05:43,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:43,617 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:43,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:43,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1328185671, now seen corresponding path program 1 times [2022-12-14 13:05:43,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:43,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332218921] [2022-12-14 13:05:43,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:43,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 13:05:43,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:43,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332218921] [2022-12-14 13:05:43,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332218921] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:43,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923234173] [2022-12-14 13:05:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:43,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:43,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:43,687 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:43,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:05:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:43,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:43,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 13:05:43,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:43,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923234173] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:43,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:43,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:05:43,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868865763] [2022-12-14 13:05:43,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:43,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:43,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:43,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:43,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:05:43,803 INFO L87 Difference]: Start difference. First operand 105316 states and 146979 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:05:49,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:49,138 INFO L93 Difference]: Finished difference Result 203764 states and 287367 transitions. [2022-12-14 13:05:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:49,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 141 [2022-12-14 13:05:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:49,422 INFO L225 Difference]: With dead ends: 203764 [2022-12-14 13:05:49,423 INFO L226 Difference]: Without dead ends: 133234 [2022-12-14 13:05:49,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:05:49,502 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 97 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:49,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 390 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:05:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133234 states. [2022-12-14 13:05:55,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133234 to 123812. [2022-12-14 13:05:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123812 states, 109557 states have (on average 1.447620873152788) internal successors, (158597), 109656 states have internal predecessors, (158597), 8079 states have call successors, (8079), 6315 states have call predecessors, (8079), 6175 states have return successors, (8463), 7841 states have call predecessors, (8463), 8079 states have call successors, (8463) [2022-12-14 13:05:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123812 states to 123812 states and 175139 transitions. [2022-12-14 13:05:55,341 INFO L78 Accepts]: Start accepts. Automaton has 123812 states and 175139 transitions. Word has length 141 [2022-12-14 13:05:55,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:55,341 INFO L495 AbstractCegarLoop]: Abstraction has 123812 states and 175139 transitions. [2022-12-14 13:05:55,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:05:55,342 INFO L276 IsEmpty]: Start isEmpty. Operand 123812 states and 175139 transitions. [2022-12-14 13:05:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 13:05:55,489 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:55,489 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:55,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 13:05:55,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-14 13:05:55,691 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:55,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash 805580689, now seen corresponding path program 1 times [2022-12-14 13:05:55,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:55,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954533893] [2022-12-14 13:05:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:55,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:05:55,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:55,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954533893] [2022-12-14 13:05:55,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954533893] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:55,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796679630] [2022-12-14 13:05:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:55,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:55,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:55,841 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:55,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:05:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:55,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:05:55,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 13:05:55,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:55,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796679630] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:55,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:55,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:05:55,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334974058] [2022-12-14 13:05:55,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:55,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:55,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:55,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:55,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:05:55,979 INFO L87 Difference]: Start difference. First operand 123812 states and 175139 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:06:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:01,556 INFO L93 Difference]: Finished difference Result 212968 states and 305111 transitions. [2022-12-14 13:06:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:06:01,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 142 [2022-12-14 13:06:01,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:01,816 INFO L225 Difference]: With dead ends: 212968 [2022-12-14 13:06:01,816 INFO L226 Difference]: Without dead ends: 123942 [2022-12-14 13:06:01,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:01,917 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 135 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:01,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 398 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:06:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123942 states. [2022-12-14 13:06:07,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123942 to 122532. [2022-12-14 13:06:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122532 states, 108277 states have (on average 1.4322247568735742) internal successors, (155077), 108376 states have internal predecessors, (155077), 8079 states have call successors, (8079), 6315 states have call predecessors, (8079), 6175 states have return successors, (8463), 7841 states have call predecessors, (8463), 8079 states have call successors, (8463) [2022-12-14 13:06:07,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122532 states to 122532 states and 171619 transitions. [2022-12-14 13:06:07,827 INFO L78 Accepts]: Start accepts. Automaton has 122532 states and 171619 transitions. Word has length 142 [2022-12-14 13:06:07,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:07,828 INFO L495 AbstractCegarLoop]: Abstraction has 122532 states and 171619 transitions. [2022-12-14 13:06:07,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:06:07,828 INFO L276 IsEmpty]: Start isEmpty. Operand 122532 states and 171619 transitions. [2022-12-14 13:06:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 13:06:07,973 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:07,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:07,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 13:06:08,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 13:06:08,175 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:08,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:08,176 INFO L85 PathProgramCache]: Analyzing trace with hash 409101011, now seen corresponding path program 1 times [2022-12-14 13:06:08,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:08,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607519226] [2022-12-14 13:06:08,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:08,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:06:08,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:08,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607519226] [2022-12-14 13:06:08,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607519226] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:08,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925340603] [2022-12-14 13:06:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:08,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:08,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:08,331 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:08,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 13:06:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:08,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:06:08,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 13:06:08,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:08,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925340603] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:08,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:06:08,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 13:06:08,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596083528] [2022-12-14 13:06:08,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:08,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:06:08,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:08,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:06:08,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:06:08,483 INFO L87 Difference]: Start difference. First operand 122532 states and 171619 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:06:16,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:16,963 INFO L93 Difference]: Finished difference Result 300980 states and 420281 transitions. [2022-12-14 13:06:16,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:06:16,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 142 [2022-12-14 13:06:16,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:17,438 INFO L225 Difference]: With dead ends: 300980 [2022-12-14 13:06:17,438 INFO L226 Difference]: Without dead ends: 178454 [2022-12-14 13:06:17,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:06:17,551 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 424 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:17,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 401 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:06:17,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178454 states. [2022-12-14 13:06:26,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178454 to 178452. [2022-12-14 13:06:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178452 states, 157193 states have (on average 1.4059722761191655) internal successors, (221009), 157340 states have internal predecessors, (221009), 12007 states have call successors, (12007), 9459 states have call predecessors, (12007), 9251 states have return successors, (12583), 11653 states have call predecessors, (12583), 12007 states have call successors, (12583) [2022-12-14 13:06:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178452 states to 178452 states and 245599 transitions. [2022-12-14 13:06:26,596 INFO L78 Accepts]: Start accepts. Automaton has 178452 states and 245599 transitions. Word has length 142 [2022-12-14 13:06:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:26,597 INFO L495 AbstractCegarLoop]: Abstraction has 178452 states and 245599 transitions. [2022-12-14 13:06:26,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:06:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 178452 states and 245599 transitions. [2022-12-14 13:06:26,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 13:06:26,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:26,834 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:26,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 13:06:27,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:27,036 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:27,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:27,038 INFO L85 PathProgramCache]: Analyzing trace with hash 37763041, now seen corresponding path program 1 times [2022-12-14 13:06:27,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:27,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614135769] [2022-12-14 13:06:27,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:27,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 13:06:27,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:27,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614135769] [2022-12-14 13:06:27,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614135769] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:27,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438500287] [2022-12-14 13:06:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:27,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:27,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:27,132 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:27,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 13:06:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:27,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:06:27,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 13:06:27,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:27,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438500287] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:27,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:06:27,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:06:27,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619946706] [2022-12-14 13:06:27,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:27,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:06:27,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:27,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:06:27,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:06:27,257 INFO L87 Difference]: Start difference. First operand 178452 states and 245599 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:06:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:37,641 INFO L93 Difference]: Finished difference Result 346048 states and 479725 transitions. [2022-12-14 13:06:37,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:06:37,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 147 [2022-12-14 13:06:37,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:38,195 INFO L225 Difference]: With dead ends: 346048 [2022-12-14 13:06:38,195 INFO L226 Difference]: Without dead ends: 227614 [2022-12-14 13:06:38,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:06:38,337 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 101 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:38,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 396 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:06:38,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227614 states. [2022-12-14 13:06:48,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227614 to 211604. [2022-12-14 13:06:48,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211604 states, 187273 states have (on average 1.4214168620142786) internal successors, (266193), 187420 states have internal predecessors, (266193), 13543 states have call successors, (13543), 10995 states have call predecessors, (13543), 10787 states have return successors, (14119), 13189 states have call predecessors, (14119), 13543 states have call successors, (14119) [2022-12-14 13:06:49,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211604 states to 211604 states and 293855 transitions. [2022-12-14 13:06:49,308 INFO L78 Accepts]: Start accepts. Automaton has 211604 states and 293855 transitions. Word has length 147 [2022-12-14 13:06:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:49,308 INFO L495 AbstractCegarLoop]: Abstraction has 211604 states and 293855 transitions. [2022-12-14 13:06:49,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:06:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 211604 states and 293855 transitions. [2022-12-14 13:06:49,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 13:06:49,556 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:49,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:49,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 13:06:49,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:49,757 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:49,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1450607306, now seen corresponding path program 1 times [2022-12-14 13:06:49,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:49,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909382762] [2022-12-14 13:06:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:49,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 13:06:49,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:49,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909382762] [2022-12-14 13:06:49,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909382762] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:49,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773932382] [2022-12-14 13:06:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:49,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:49,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:49,895 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:49,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 13:06:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:50,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:06:50,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 13:06:50,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:50,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773932382] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:50,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:06:50,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-12-14 13:06:50,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783293131] [2022-12-14 13:06:50,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:50,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:06:50,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:50,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:06:50,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:50,068 INFO L87 Difference]: Start difference. First operand 211604 states and 293855 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:07:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:07:03,104 INFO L93 Difference]: Finished difference Result 433362 states and 593751 transitions. [2022-12-14 13:07:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:07:03,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 148 [2022-12-14 13:07:03,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:07:03,647 INFO L225 Difference]: With dead ends: 433362 [2022-12-14 13:07:03,647 INFO L226 Difference]: Without dead ends: 221764 [2022-12-14 13:07:03,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:07:03,841 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 550 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:07:03,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 345 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:07:04,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221764 states. [2022-12-14 13:07:16,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221764 to 221762. [2022-12-14 13:07:16,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221762 states, 193351 states have (on average 1.3640839716370745) internal successors, (263747), 193570 states have internal predecessors, (263747), 16183 states have call successors, (16183), 12507 states have call predecessors, (16183), 12227 states have return successors, (16903), 15685 states have call predecessors, (16903), 16183 states have call successors, (16903) [2022-12-14 13:07:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221762 states to 221762 states and 296833 transitions. [2022-12-14 13:07:17,256 INFO L78 Accepts]: Start accepts. Automaton has 221762 states and 296833 transitions. Word has length 148 [2022-12-14 13:07:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:07:17,256 INFO L495 AbstractCegarLoop]: Abstraction has 221762 states and 296833 transitions. [2022-12-14 13:07:17,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:07:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 221762 states and 296833 transitions. [2022-12-14 13:07:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 13:07:17,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:07:17,645 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:07:17,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 13:07:17,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 13:07:17,847 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:07:17,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:07:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash 376401050, now seen corresponding path program 1 times [2022-12-14 13:07:17,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:07:17,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203594231] [2022-12-14 13:07:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:07:17,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:07:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:07:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:07:17,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:07:17,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203594231] [2022-12-14 13:07:17,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203594231] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:07:17,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809084804] [2022-12-14 13:07:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:07:17,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:07:17,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:07:17,995 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:07:17,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 13:07:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:07:18,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:07:18,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:07:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 13:07:18,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:07:18,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809084804] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:07:18,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:07:18,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-12-14 13:07:18,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930775519] [2022-12-14 13:07:18,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:07:18,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:07:18,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:07:18,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:07:18,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:07:18,168 INFO L87 Difference]: Start difference. First operand 221762 states and 296833 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:07:30,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:07:30,491 INFO L93 Difference]: Finished difference Result 417344 states and 555037 transitions. [2022-12-14 13:07:30,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:07:30,492 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 150 [2022-12-14 13:07:30,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:07:30,965 INFO L225 Difference]: With dead ends: 417344 [2022-12-14 13:07:30,965 INFO L226 Difference]: Without dead ends: 195588 [2022-12-14 13:07:31,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:07:31,204 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 497 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:07:31,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 367 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:07:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195588 states. [2022-12-14 13:07:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195588 to 191750. [2022-12-14 13:07:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191750 states, 166553 states have (on average 1.3439745906708376) internal successors, (223843), 166807 states have internal predecessors, (223843), 14365 states have call successors, (14365), 11047 states have call predecessors, (14365), 10831 states have return successors, (15437), 13896 states have call predecessors, (15437), 14365 states have call successors, (15437) [2022-12-14 13:07:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191750 states to 191750 states and 253645 transitions. [2022-12-14 13:07:43,418 INFO L78 Accepts]: Start accepts. Automaton has 191750 states and 253645 transitions. Word has length 150 [2022-12-14 13:07:43,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:07:43,418 INFO L495 AbstractCegarLoop]: Abstraction has 191750 states and 253645 transitions. [2022-12-14 13:07:43,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:07:43,418 INFO L276 IsEmpty]: Start isEmpty. Operand 191750 states and 253645 transitions. [2022-12-14 13:07:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 13:07:43,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:07:43,752 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 13:07:43,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 13:07:43,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 13:07:43,953 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:07:43,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:07:43,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1683036473, now seen corresponding path program 2 times [2022-12-14 13:07:43,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:07:43,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341208672] [2022-12-14 13:07:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:07:43,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:07:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:07:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 16 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:07:44,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:07:44,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341208672] [2022-12-14 13:07:44,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341208672] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:07:44,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973285717] [2022-12-14 13:07:44,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:07:44,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:07:44,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:07:44,097 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:07:44,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9949516-a50a-4a1f-88c3-1de057fea6b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 13:07:44,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:07:44,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:07:44,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:07:44,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:07:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:07:44,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:07:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 47 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 13:07:44,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973285717] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:07:44,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [427919310] [2022-12-14 13:07:44,652 INFO L159 IcfgInterpreter]: Started Sifa with 76 locations of interest [2022-12-14 13:07:44,652 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:07:44,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:07:44,660 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:07:44,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:07:50,051 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 138 for LOIs [2022-12-14 13:07:50,088 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2022-12-14 13:07:50,289 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 16384 conjuctions. This might take some time... [2022-12-14 13:09:04,716 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 16384 conjuctions. [2022-12-14 13:09:05,336 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2022-12-14 13:09:05,558 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 16384 conjuctions. This might take some time... [2022-12-14 13:10:20,056 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 16384 conjuctions.