./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p03.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e5eb077c5bf07ad9cd5f1254ee07af63ac3804cfdd9319e30c731bec514d1921 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:50:17,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:50:17,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:50:17,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:50:17,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:50:17,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:50:17,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:50:17,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:50:17,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:50:17,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:50:17,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:50:17,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:50:17,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:50:17,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:50:17,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:50:17,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:50:17,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:50:17,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:50:17,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:50:17,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:50:17,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:50:17,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:50:17,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:50:17,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:50:17,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:50:17,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:50:17,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:50:17,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:50:17,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:50:17,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:50:17,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:50:17,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:50:17,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:50:17,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:50:17,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:50:17,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:50:17,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:50:17,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:50:17,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:50:17,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:50:17,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:50:17,420 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:50:17,447 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:50:17,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:50:17,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:50:17,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:50:17,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:50:17,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:50:17,450 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:50:17,450 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:50:17,450 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:50:17,451 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:50:17,451 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:50:17,451 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:50:17,451 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:50:17,452 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:50:17,452 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:50:17,452 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:50:17,453 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:50:17,453 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:50:17,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:50:17,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:50:17,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:50:17,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:50:17,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:50:17,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:50:17,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:50:17,456 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:50:17,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:50:17,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:50:17,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:50:17,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:50:17,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:50:17,458 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:50:17,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:50:17,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:50:17,458 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:50:17,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:50:17,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:50:17,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:50:17,459 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_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5eb077c5bf07ad9cd5f1254ee07af63ac3804cfdd9319e30c731bec514d1921 [2022-11-03 03:50:17,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:50:17,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:50:17,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:50:17,872 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:50:17,874 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:50:17,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p03.c [2022-11-03 03:50:17,985 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/data/89b3d13e0/c47a868093094b3ba1c503981096be00/FLAG925ec5f94 [2022-11-03 03:50:18,705 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:50:18,706 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p03.c [2022-11-03 03:50:18,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/data/89b3d13e0/c47a868093094b3ba1c503981096be00/FLAG925ec5f94 [2022-11-03 03:50:18,974 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/data/89b3d13e0/c47a868093094b3ba1c503981096be00 [2022-11-03 03:50:18,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:50:18,978 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:50:18,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:50:18,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:50:18,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:50:18,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:50:18" (1/1) ... [2022-11-03 03:50:18,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15bd2cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:18, skipping insertion in model container [2022-11-03 03:50:18,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:50:18" (1/1) ... [2022-11-03 03:50:19,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:50:19,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:50:19,294 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p03.c[1107,1120] [2022-11-03 03:50:19,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:50:19,431 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:50:19,449 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p03.c[1107,1120] [2022-11-03 03:50:19,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:50:19,590 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:50:19,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:19 WrapperNode [2022-11-03 03:50:19,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:50:19,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:50:19,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:50:19,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:50:19,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:19" (1/1) ... [2022-11-03 03:50:19,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:19" (1/1) ... [2022-11-03 03:50:19,705 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 541 [2022-11-03 03:50:19,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:50:19,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:50:19,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:50:19,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:50:19,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:19" (1/1) ... [2022-11-03 03:50:19,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:19" (1/1) ... [2022-11-03 03:50:19,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:19" (1/1) ... [2022-11-03 03:50:19,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:19" (1/1) ... [2022-11-03 03:50:19,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:19" (1/1) ... [2022-11-03 03:50:19,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:19" (1/1) ... [2022-11-03 03:50:19,797 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:19" (1/1) ... [2022-11-03 03:50:19,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:19" (1/1) ... [2022-11-03 03:50:19,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:50:19,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:50:19,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:50:19,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:50:19,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:19" (1/1) ... [2022-11-03 03:50:19,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:50:19,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:19,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:50:19,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:50:19,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:50:19,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:50:20,184 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:50:20,187 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:50:21,109 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:50:22,036 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:50:22,036 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:50:22,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:50:22 BoogieIcfgContainer [2022-11-03 03:50:22,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:50:22,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:50:22,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:50:22,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:50:22,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:50:18" (1/3) ... [2022-11-03 03:50:22,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6854ab53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:50:22, skipping insertion in model container [2022-11-03 03:50:22,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:19" (2/3) ... [2022-11-03 03:50:22,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6854ab53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:50:22, skipping insertion in model container [2022-11-03 03:50:22,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:50:22" (3/3) ... [2022-11-03 03:50:22,055 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p03.c [2022-11-03 03:50:22,079 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:50:22,079 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:50:22,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:50:22,175 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;@fe89baa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:50:22,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:50:22,181 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:22,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:50:22,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:22,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:50:22,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:22,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash 9334611, now seen corresponding path program 1 times [2022-11-03 03:50:22,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:50:22,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192326929] [2022-11-03 03:50:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:22,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:50:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:50:22,588 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:50:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:50:22,843 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:50:22,845 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:50:22,847 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:50:22,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:50:22,856 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:50:22,862 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:50:22,906 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:50:22,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:50:22 BoogieIcfgContainer [2022-11-03 03:50:22,928 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:50:22,931 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:50:22,931 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:50:22,931 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:50:22,933 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:50:22" (3/4) ... [2022-11-03 03:50:22,937 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:50:22,937 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:50:22,941 INFO L158 Benchmark]: Toolchain (without parser) took 3961.23ms. Allocated memory was 115.3MB in the beginning and 165.7MB in the end (delta: 50.3MB). Free memory was 82.3MB in the beginning and 74.0MB in the end (delta: 8.3MB). Peak memory consumption was 59.7MB. Max. memory is 16.1GB. [2022-11-03 03:50:22,941 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 86.0MB. Free memory was 65.9MB in the beginning and 65.9MB in the end (delta: 27.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:50:22,943 INFO L158 Benchmark]: CACSL2BoogieTranslator took 608.16ms. Allocated memory is still 115.3MB. Free memory was 82.0MB in the beginning and 83.7MB in the end (delta: -1.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 03:50:22,944 INFO L158 Benchmark]: Boogie Procedure Inliner took 111.47ms. Allocated memory is still 115.3MB. Free memory was 83.7MB in the beginning and 77.9MB in the end (delta: 5.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 03:50:22,952 INFO L158 Benchmark]: Boogie Preprocessor took 117.36ms. Allocated memory is still 115.3MB. Free memory was 77.9MB in the beginning and 74.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:50:22,954 INFO L158 Benchmark]: RCFGBuilder took 2216.49ms. Allocated memory was 115.3MB in the beginning and 165.7MB in the end (delta: 50.3MB). Free memory was 74.8MB in the beginning and 103.3MB in the end (delta: -28.5MB). Peak memory consumption was 57.9MB. Max. memory is 16.1GB. [2022-11-03 03:50:22,956 INFO L158 Benchmark]: TraceAbstraction took 883.49ms. Allocated memory is still 165.7MB. Free memory was 103.3MB in the beginning and 75.0MB in the end (delta: 28.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-11-03 03:50:22,957 INFO L158 Benchmark]: Witness Printer took 7.92ms. Allocated memory is still 165.7MB. Free memory was 75.0MB in the beginning and 74.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:50:22,966 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 86.0MB. Free memory was 65.9MB in the beginning and 65.9MB in the end (delta: 27.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 608.16ms. Allocated memory is still 115.3MB. Free memory was 82.0MB in the beginning and 83.7MB in the end (delta: -1.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 111.47ms. Allocated memory is still 115.3MB. Free memory was 83.7MB in the beginning and 77.9MB in the end (delta: 5.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 117.36ms. Allocated memory is still 115.3MB. Free memory was 77.9MB in the beginning and 74.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2216.49ms. Allocated memory was 115.3MB in the beginning and 165.7MB in the end (delta: 50.3MB). Free memory was 74.8MB in the beginning and 103.3MB in the end (delta: -28.5MB). Peak memory consumption was 57.9MB. Max. memory is 16.1GB. * TraceAbstraction took 883.49ms. Allocated memory is still 165.7MB. Free memory was 103.3MB in the beginning and 75.0MB in the end (delta: 28.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Witness Printer took 7.92ms. Allocated memory is still 165.7MB. Free memory was 75.0MB in the beginning and 74.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 157, overapproximation of bitwiseAnd at line 151. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 8); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (8 - 1); [L31] const SORT_7 mask_SORT_7 = (SORT_7)-1 >> (sizeof(SORT_7) * 8 - 10); [L32] const SORT_7 msb_SORT_7 = (SORT_7)1 << (10 - 1); [L34] const SORT_11 mask_SORT_11 = (SORT_11)-1 >> (sizeof(SORT_11) * 8 - 2); [L35] const SORT_11 msb_SORT_11 = (SORT_11)1 << (2 - 1); [L37] const SORT_13 mask_SORT_13 = (SORT_13)-1 >> (sizeof(SORT_13) * 8 - 32); [L38] const SORT_13 msb_SORT_13 = (SORT_13)1 << (32 - 1); [L40] const SORT_30 mask_SORT_30 = (SORT_30)-1 >> (sizeof(SORT_30) * 8 - 4); [L41] const SORT_30 msb_SORT_30 = (SORT_30)1 << (4 - 1); [L43] const SORT_7 var_8 = 0; [L44] const SORT_13 var_15 = 0; [L45] const SORT_1 var_19 = 1; [L46] const SORT_1 var_23 = 0; [L47] const SORT_13 var_74 = 1; [L48] const SORT_13 var_78 = 104; [L50] SORT_1 input_2; [L51] SORT_3 input_4; [L52] SORT_1 input_5; [L53] SORT_1 input_6; [L54] SORT_1 input_28; [L55] SORT_30 input_31; [L56] SORT_1 input_33; [L57] SORT_30 input_35; [L58] SORT_1 input_37; [L59] SORT_1 input_39; [L60] SORT_1 input_45; [L61] SORT_1 input_47; [L62] SORT_1 input_49; [L63] SORT_3 input_53; [L64] SORT_1 input_56; [L65] SORT_1 input_66; [L66] SORT_7 input_72; [L67] SORT_1 input_86; [L68] SORT_1 input_92; [L69] SORT_1 input_98; [L70] SORT_1 input_104; [L71] SORT_1 input_105; [L72] SORT_1 input_106; [L73] SORT_1 input_120; [L74] SORT_1 input_122; [L75] SORT_1 input_137; [L76] SORT_1 input_138; [L77] SORT_1 input_139; [L79] SORT_7 state_9 = __VERIFIER_nondet_ushort() & mask_SORT_7; [L80] SORT_1 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L81] SORT_1 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L82] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L83] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L84] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_1 state_58 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L86] SORT_1 state_60 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] SORT_1 state_62 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L88] SORT_1 state_64 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L89] SORT_1 state_68 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L90] SORT_1 state_70 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L92] SORT_7 init_10_arg_1 = var_8; [L93] state_9 = init_10_arg_1 [L94] SORT_1 init_25_arg_1 = var_23; [L95] state_24 = init_25_arg_1 [L96] SORT_1 init_27_arg_1 = var_23; [L97] state_26 = init_27_arg_1 [L98] SORT_1 init_42_arg_1 = var_23; [L99] state_41 = init_42_arg_1 [L100] SORT_1 init_44_arg_1 = var_23; [L101] state_43 = init_44_arg_1 [L102] SORT_1 init_52_arg_1 = var_19; [L103] state_51 = init_52_arg_1 [L104] SORT_1 init_59_arg_1 = var_23; [L105] state_58 = init_59_arg_1 [L106] SORT_1 init_61_arg_1 = var_23; [L107] state_60 = init_61_arg_1 [L108] SORT_1 init_63_arg_1 = var_23; [L109] state_62 = init_63_arg_1 [L110] SORT_1 init_65_arg_1 = var_23; [L111] state_64 = init_65_arg_1 [L112] SORT_1 init_69_arg_1 = var_23; [L113] state_68 = init_69_arg_1 [L114] SORT_1 init_71_arg_1 = var_23; [L115] state_70 = init_71_arg_1 VAL [init_10_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_52_arg_1=1, init_59_arg_1=0, init_61_arg_1=0, init_63_arg_1=0, init_65_arg_1=0, init_69_arg_1=0, init_71_arg_1=0, mask_SORT_1=1, mask_SORT_11=3, mask_SORT_13=4294967295, mask_SORT_3=255, mask_SORT_30=15, mask_SORT_7=1023, msb_SORT_1=1, msb_SORT_11=2, msb_SORT_13=2147483648, msb_SORT_3=128, msb_SORT_30=8, msb_SORT_7=512, state_24=0, state_26=0, state_41=0, state_43=0, state_51=1, state_58=0, state_60=0, state_62=0, state_64=0, state_68=0, state_70=0, state_9=0, var_15=0, var_19=1, var_23=0, var_74=1, var_78=104, var_8=0] [L118] input_2 = __VERIFIER_nondet_uchar() [L119] input_4 = __VERIFIER_nondet_uchar() [L120] input_5 = __VERIFIER_nondet_uchar() [L121] input_6 = __VERIFIER_nondet_uchar() [L122] input_28 = __VERIFIER_nondet_uchar() [L123] input_31 = __VERIFIER_nondet_uchar() [L124] input_33 = __VERIFIER_nondet_uchar() [L125] input_35 = __VERIFIER_nondet_uchar() [L126] input_37 = __VERIFIER_nondet_uchar() [L127] input_39 = __VERIFIER_nondet_uchar() [L128] input_45 = __VERIFIER_nondet_uchar() [L129] input_47 = __VERIFIER_nondet_uchar() [L130] input_49 = __VERIFIER_nondet_uchar() [L131] input_53 = __VERIFIER_nondet_uchar() [L132] input_56 = __VERIFIER_nondet_uchar() [L133] input_66 = __VERIFIER_nondet_uchar() [L134] input_72 = __VERIFIER_nondet_ushort() [L135] input_86 = __VERIFIER_nondet_uchar() [L136] input_92 = __VERIFIER_nondet_uchar() [L137] input_98 = __VERIFIER_nondet_uchar() [L138] input_104 = __VERIFIER_nondet_uchar() [L139] input_105 = __VERIFIER_nondet_uchar() [L140] input_106 = __VERIFIER_nondet_uchar() [L141] input_120 = __VERIFIER_nondet_uchar() [L142] input_122 = __VERIFIER_nondet_uchar() [L143] input_137 = __VERIFIER_nondet_uchar() [L144] input_138 = __VERIFIER_nondet_uchar() [L145] input_139 = __VERIFIER_nondet_uchar() [L148] SORT_7 var_12_arg_0 = state_9; [L149] SORT_11 var_12 = var_12_arg_0 >> 8; [L150] SORT_11 var_14_arg_0 = var_12; [L151] var_14_arg_0 = var_14_arg_0 & mask_SORT_11 [L152] SORT_13 var_14 = var_14_arg_0; [L153] SORT_13 var_16_arg_0 = var_14; [L154] SORT_13 var_16_arg_1 = var_15; [L155] SORT_1 var_16 = var_16_arg_0 == var_16_arg_1; [L156] SORT_1 var_20_arg_0 = var_16; [L157] SORT_1 var_20 = ~var_20_arg_0; [L158] SORT_1 var_21_arg_0 = var_19; [L159] SORT_1 var_21_arg_1 = var_20; [L160] SORT_1 var_21 = var_21_arg_0 & var_21_arg_1; [L161] var_21 = var_21 & mask_SORT_1 [L162] SORT_1 bad_22_arg_0 = var_21; [L163] CALL __VERIFIER_assert(!(bad_22_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 03:50:23,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e5eb077c5bf07ad9cd5f1254ee07af63ac3804cfdd9319e30c731bec514d1921 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:50:25,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:50:25,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:50:26,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:50:26,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:50:26,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:50:26,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:50:26,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:50:26,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:50:26,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:50:26,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:50:26,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:50:26,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:50:26,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:50:26,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:50:26,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:50:26,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:50:26,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:50:26,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:50:26,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:50:26,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:50:26,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:50:26,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:50:26,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:50:26,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:50:26,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:50:26,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:50:26,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:50:26,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:50:26,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:50:26,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:50:26,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:50:26,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:50:26,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:50:26,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:50:26,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:50:26,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:50:26,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:50:26,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:50:26,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:50:26,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:50:26,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:50:26,213 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:50:26,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:50:26,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:50:26,216 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:50:26,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:50:26,218 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:50:26,218 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:50:26,218 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:50:26,219 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:50:26,219 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:50:26,220 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:50:26,221 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:50:26,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:50:26,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:50:26,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:50:26,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:50:26,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:50:26,225 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:50:26,225 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:50:26,225 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:50:26,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:50:26,226 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:50:26,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:50:26,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:50:26,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:50:26,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:50:26,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:50:26,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:50:26,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:50:26,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:50:26,229 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:50:26,229 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:26,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:50:26,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:50:26,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:50:26,230 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5eb077c5bf07ad9cd5f1254ee07af63ac3804cfdd9319e30c731bec514d1921 [2022-11-03 03:50:26,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:50:26,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:50:26,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:50:26,725 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:50:26,726 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:50:26,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p03.c [2022-11-03 03:50:26,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/data/a684e9301/b40ab4d8873e404eb9e79162da4123c0/FLAGed62b2568 [2022-11-03 03:50:27,630 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:50:27,631 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p03.c [2022-11-03 03:50:27,658 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/data/a684e9301/b40ab4d8873e404eb9e79162da4123c0/FLAGed62b2568 [2022-11-03 03:50:27,902 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/data/a684e9301/b40ab4d8873e404eb9e79162da4123c0 [2022-11-03 03:50:27,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:50:27,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:50:27,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:50:27,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:50:27,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:50:27,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:50:27" (1/1) ... [2022-11-03 03:50:27,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180a2619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:27, skipping insertion in model container [2022-11-03 03:50:27,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:50:27" (1/1) ... [2022-11-03 03:50:27,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:50:27,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:50:28,177 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p03.c[1107,1120] [2022-11-03 03:50:28,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:50:28,357 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:50:28,371 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p03.c[1107,1120] [2022-11-03 03:50:28,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:50:28,461 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:50:28,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:28 WrapperNode [2022-11-03 03:50:28,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:50:28,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:50:28,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:50:28,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:50:28,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:28" (1/1) ... [2022-11-03 03:50:28,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:28" (1/1) ... [2022-11-03 03:50:28,523 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 541 [2022-11-03 03:50:28,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:50:28,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:50:28,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:50:28,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:50:28,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:28" (1/1) ... [2022-11-03 03:50:28,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:28" (1/1) ... [2022-11-03 03:50:28,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:28" (1/1) ... [2022-11-03 03:50:28,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:28" (1/1) ... [2022-11-03 03:50:28,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:28" (1/1) ... [2022-11-03 03:50:28,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:28" (1/1) ... [2022-11-03 03:50:28,592 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:28" (1/1) ... [2022-11-03 03:50:28,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:28" (1/1) ... [2022-11-03 03:50:28,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:50:28,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:50:28,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:50:28,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:50:28,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:28" (1/1) ... [2022-11-03 03:50:28,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:50:28,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:28,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:50:28,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:50:28,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:50:28,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:50:28,999 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:50:29,002 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:50:29,891 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:50:29,909 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:50:29,911 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:50:29,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:50:29 BoogieIcfgContainer [2022-11-03 03:50:29,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:50:29,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:50:29,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:50:29,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:50:29,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:50:27" (1/3) ... [2022-11-03 03:50:29,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20aad5c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:50:29, skipping insertion in model container [2022-11-03 03:50:29,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:28" (2/3) ... [2022-11-03 03:50:29,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20aad5c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:50:29, skipping insertion in model container [2022-11-03 03:50:29,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:50:29" (3/3) ... [2022-11-03 03:50:29,928 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p03.c [2022-11-03 03:50:29,954 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:50:29,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:50:30,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:50:30,077 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;@493daa45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:50:30,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:50:30,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 82 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:30,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:50:30,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:30,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:50:30,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:30,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 03:50:30,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:30,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971981122] [2022-11-03 03:50:30,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:30,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:30,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:30,130 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:30,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:50:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:50:30,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:30,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:30,693 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:30,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971981122] [2022-11-03 03:50:30,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971981122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:30,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:30,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:30,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180017185] [2022-11-03 03:50:30,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:30,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:30,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:30,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:30,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:30,754 INFO L87 Difference]: Start difference. First operand has 83 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 82 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:30,995 INFO L93 Difference]: Finished difference Result 236 states and 354 transitions. [2022-11-03 03:50:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:31,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 03:50:31,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:31,019 INFO L225 Difference]: With dead ends: 236 [2022-11-03 03:50:31,019 INFO L226 Difference]: Without dead ends: 155 [2022-11-03 03:50:31,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:31,036 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 219 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:31,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 311 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-03 03:50:31,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 81. [2022-11-03 03:50:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 117 transitions. [2022-11-03 03:50:31,121 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 117 transitions. Word has length 5 [2022-11-03 03:50:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:31,122 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 117 transitions. [2022-11-03 03:50:31,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 117 transitions. [2022-11-03 03:50:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:31,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:31,130 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:31,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 03:50:31,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:31,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1926009885, now seen corresponding path program 1 times [2022-11-03 03:50:31,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:31,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280516350] [2022-11-03 03:50:31,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:31,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:31,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:31,349 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:31,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:50:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:31,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:50:31,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:31,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:31,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:31,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280516350] [2022-11-03 03:50:31,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280516350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:31,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:31,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:31,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683967608] [2022-11-03 03:50:31,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:31,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:31,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:31,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:31,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:31,787 INFO L87 Difference]: Start difference. First operand 81 states and 117 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:31,887 INFO L93 Difference]: Finished difference Result 307 states and 450 transitions. [2022-11-03 03:50:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:31,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:31,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:31,891 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:31,891 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:31,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:31,894 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 324 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:31,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 438 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:31,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:31,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 83. [2022-11-03 03:50:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.451219512195122) internal successors, (119), 82 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:31,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 119 transitions. [2022-11-03 03:50:31,907 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 119 transitions. Word has length 80 [2022-11-03 03:50:31,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:31,907 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 119 transitions. [2022-11-03 03:50:31,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:31,908 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 119 transitions. [2022-11-03 03:50:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:31,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:31,911 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:31,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:32,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:32,129 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:32,130 INFO L85 PathProgramCache]: Analyzing trace with hash -634852961, now seen corresponding path program 1 times [2022-11-03 03:50:32,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:32,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74765618] [2022-11-03 03:50:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:32,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:32,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:32,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:32,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:50:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:32,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:32,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:32,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:32,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:32,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74765618] [2022-11-03 03:50:32,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74765618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:32,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:32,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:32,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966918359] [2022-11-03 03:50:32,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:32,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:32,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:32,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:32,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:32,542 INFO L87 Difference]: Start difference. First operand 83 states and 119 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:32,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:32,642 INFO L93 Difference]: Finished difference Result 307 states and 449 transitions. [2022-11-03 03:50:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:32,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:32,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:32,646 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:32,647 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:32,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:32,653 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 313 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:32,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 419 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:32,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:32,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 87. [2022-11-03 03:50:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.441860465116279) internal successors, (124), 86 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2022-11-03 03:50:32,692 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 80 [2022-11-03 03:50:32,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:32,693 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2022-11-03 03:50:32,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:32,694 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2022-11-03 03:50:32,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:32,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:32,697 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:32,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:32,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:32,915 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:32,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1602203615, now seen corresponding path program 1 times [2022-11-03 03:50:32,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:32,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16113794] [2022-11-03 03:50:32,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:32,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:32,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:32,923 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:32,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:50:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:33,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:33,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:33,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:33,339 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:33,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16113794] [2022-11-03 03:50:33,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16113794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:33,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:33,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:33,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251785355] [2022-11-03 03:50:33,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:33,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:33,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:33,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:33,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:33,348 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:33,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:33,394 INFO L93 Difference]: Finished difference Result 307 states and 448 transitions. [2022-11-03 03:50:33,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:33,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:33,402 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:33,402 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:33,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:33,412 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 307 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:33,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 439 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:33,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 89. [2022-11-03 03:50:33,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.4318181818181819) internal successors, (126), 88 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 126 transitions. [2022-11-03 03:50:33,453 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 126 transitions. Word has length 80 [2022-11-03 03:50:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:33,454 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 126 transitions. [2022-11-03 03:50:33,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:33,455 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 126 transitions. [2022-11-03 03:50:33,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:33,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:33,456 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:33,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:33,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:33,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:33,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2094829789, now seen corresponding path program 1 times [2022-11-03 03:50:33,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:33,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25883376] [2022-11-03 03:50:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:33,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:33,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:33,661 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:33,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:50:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:33,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:33,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:33,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:33,986 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:33,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25883376] [2022-11-03 03:50:33,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25883376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:33,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:33,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:33,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685858339] [2022-11-03 03:50:33,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:33,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:33,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:33,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:33,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:33,989 INFO L87 Difference]: Start difference. First operand 89 states and 126 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:34,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:34,031 INFO L93 Difference]: Finished difference Result 307 states and 447 transitions. [2022-11-03 03:50:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:34,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:34,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:34,033 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:34,034 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:34,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:34,035 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 301 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:34,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 438 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:34,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:34,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 91. [2022-11-03 03:50:34,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4222222222222223) internal successors, (128), 90 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:34,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 128 transitions. [2022-11-03 03:50:34,044 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 128 transitions. Word has length 80 [2022-11-03 03:50:34,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:34,045 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 128 transitions. [2022-11-03 03:50:34,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:34,046 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 128 transitions. [2022-11-03 03:50:34,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:34,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:34,047 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:34,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:34,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:34,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:34,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:34,278 INFO L85 PathProgramCache]: Analyzing trace with hash 983983781, now seen corresponding path program 1 times [2022-11-03 03:50:34,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:34,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999120968] [2022-11-03 03:50:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:34,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:34,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:34,281 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:34,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:50:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:34,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:34,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:34,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:34,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:34,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999120968] [2022-11-03 03:50:34,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999120968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:34,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:34,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:34,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850024837] [2022-11-03 03:50:34,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:34,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:34,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:34,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:34,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:34,639 INFO L87 Difference]: Start difference. First operand 91 states and 128 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:34,683 INFO L93 Difference]: Finished difference Result 307 states and 446 transitions. [2022-11-03 03:50:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:34,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:34,686 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:34,686 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:34,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:34,688 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 290 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:34,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 434 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 95. [2022-11-03 03:50:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.4148936170212767) internal successors, (133), 94 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2022-11-03 03:50:34,696 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 80 [2022-11-03 03:50:34,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:34,697 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2022-11-03 03:50:34,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2022-11-03 03:50:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:34,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:34,699 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:34,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:34,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:34,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:34,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:34,924 INFO L85 PathProgramCache]: Analyzing trace with hash 566587175, now seen corresponding path program 1 times [2022-11-03 03:50:34,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:34,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064068506] [2022-11-03 03:50:34,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:34,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:34,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:34,926 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:34,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:50:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:35,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:35,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:35,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:35,269 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:35,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064068506] [2022-11-03 03:50:35,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064068506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:35,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:35,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:35,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10516425] [2022-11-03 03:50:35,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:35,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:35,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:35,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:35,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:35,272 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:35,347 INFO L93 Difference]: Finished difference Result 307 states and 445 transitions. [2022-11-03 03:50:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:35,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:35,350 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:35,350 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:35,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:35,353 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 284 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:35,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 433 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 97. [2022-11-03 03:50:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.40625) internal successors, (135), 96 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 135 transitions. [2022-11-03 03:50:35,375 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 135 transitions. Word has length 80 [2022-11-03 03:50:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:35,376 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 135 transitions. [2022-11-03 03:50:35,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:35,376 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 135 transitions. [2022-11-03 03:50:35,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:35,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:35,387 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:35,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:35,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:35,592 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:35,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1766805463, now seen corresponding path program 1 times [2022-11-03 03:50:35,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:35,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998736905] [2022-11-03 03:50:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:35,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:35,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:35,594 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:35,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:50:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:35,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:50:35,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:36,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:36,008 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:36,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998736905] [2022-11-03 03:50:36,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998736905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:36,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:36,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:50:36,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433081350] [2022-11-03 03:50:36,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:36,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:50:36,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:36,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:50:36,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:36,011 INFO L87 Difference]: Start difference. First operand 97 states and 135 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:36,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:36,139 INFO L93 Difference]: Finished difference Result 252 states and 362 transitions. [2022-11-03 03:50:36,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:50:36,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:36,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:36,141 INFO L225 Difference]: With dead ends: 252 [2022-11-03 03:50:36,141 INFO L226 Difference]: Without dead ends: 175 [2022-11-03 03:50:36,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:50:36,143 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 307 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:36,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 437 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-03 03:50:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 99. [2022-11-03 03:50:36,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.3979591836734695) internal successors, (137), 98 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2022-11-03 03:50:36,153 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 80 [2022-11-03 03:50:36,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:36,154 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2022-11-03 03:50:36,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2022-11-03 03:50:36,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:36,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:36,158 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:36,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:36,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:36,376 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1967462055, now seen corresponding path program 1 times [2022-11-03 03:50:36,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:36,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348069223] [2022-11-03 03:50:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:36,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:36,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:36,380 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:36,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:50:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:36,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:36,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:36,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:36,751 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:36,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348069223] [2022-11-03 03:50:36,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348069223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:36,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:36,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:36,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075794655] [2022-11-03 03:50:36,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:36,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:36,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:36,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:36,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:36,755 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:36,812 INFO L93 Difference]: Finished difference Result 307 states and 443 transitions. [2022-11-03 03:50:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:36,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:36,818 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:36,818 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:36,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:36,822 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 272 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:36,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 425 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 101. [2022-11-03 03:50:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.39) internal successors, (139), 100 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 139 transitions. [2022-11-03 03:50:36,829 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 139 transitions. Word has length 80 [2022-11-03 03:50:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:36,832 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 139 transitions. [2022-11-03 03:50:36,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 139 transitions. [2022-11-03 03:50:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:36,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:36,834 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:36,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:37,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:37,056 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:37,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1066587991, now seen corresponding path program 1 times [2022-11-03 03:50:37,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:37,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874221270] [2022-11-03 03:50:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:37,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:37,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:37,066 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:37,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:50:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:37,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:37,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:37,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:37,476 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:37,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874221270] [2022-11-03 03:50:37,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874221270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:37,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:37,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:37,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071964010] [2022-11-03 03:50:37,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:37,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:37,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:37,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:37,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:37,478 INFO L87 Difference]: Start difference. First operand 101 states and 139 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:37,533 INFO L93 Difference]: Finished difference Result 307 states and 442 transitions. [2022-11-03 03:50:37,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:37,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:37,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:37,535 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:37,536 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:37,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:37,537 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 266 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:37,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 430 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:37,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 103. [2022-11-03 03:50:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.3823529411764706) internal successors, (141), 102 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:37,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2022-11-03 03:50:37,545 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 80 [2022-11-03 03:50:37,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:37,546 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2022-11-03 03:50:37,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:37,546 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2022-11-03 03:50:37,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:37,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:37,548 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:37,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:37,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:37,772 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:37,773 INFO L85 PathProgramCache]: Analyzing trace with hash 320197419, now seen corresponding path program 1 times [2022-11-03 03:50:37,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:37,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128636521] [2022-11-03 03:50:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:37,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:37,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:37,775 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:37,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:50:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:38,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:38,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:38,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:38,134 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:38,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128636521] [2022-11-03 03:50:38,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128636521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:38,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:38,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:38,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122652678] [2022-11-03 03:50:38,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:38,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:38,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:38,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:38,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:38,138 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:38,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:38,186 INFO L93 Difference]: Finished difference Result 307 states and 441 transitions. [2022-11-03 03:50:38,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:38,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:38,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:38,189 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:38,189 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:38,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:38,191 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 255 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:38,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 423 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:38,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 107. [2022-11-03 03:50:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.3773584905660377) internal successors, (146), 106 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 146 transitions. [2022-11-03 03:50:38,200 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 146 transitions. Word has length 80 [2022-11-03 03:50:38,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:38,201 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 146 transitions. [2022-11-03 03:50:38,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:38,201 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 146 transitions. [2022-11-03 03:50:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:38,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:38,202 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:38,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:38,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:38,421 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:38,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:38,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1708388691, now seen corresponding path program 1 times [2022-11-03 03:50:38,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:38,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803782075] [2022-11-03 03:50:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:38,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:38,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:38,424 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:38,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:50:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:38,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:50:38,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:38,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:38,911 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:38,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803782075] [2022-11-03 03:50:38,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803782075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:38,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:38,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:38,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398392371] [2022-11-03 03:50:38,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:38,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:38,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:38,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:38,914 INFO L87 Difference]: Start difference. First operand 107 states and 146 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:39,051 INFO L93 Difference]: Finished difference Result 307 states and 440 transitions. [2022-11-03 03:50:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:39,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:39,054 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:39,054 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:39,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:39,056 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 249 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:39,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 395 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:39,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:39,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 109. [2022-11-03 03:50:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.3703703703703705) internal successors, (148), 108 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 148 transitions. [2022-11-03 03:50:39,064 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 148 transitions. Word has length 80 [2022-11-03 03:50:39,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:39,064 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 148 transitions. [2022-11-03 03:50:39,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:39,065 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 148 transitions. [2022-11-03 03:50:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:39,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:39,066 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:39,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:39,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:39,283 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:39,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:39,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1723907409, now seen corresponding path program 1 times [2022-11-03 03:50:39,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:39,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454517621] [2022-11-03 03:50:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:39,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:39,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:39,286 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:39,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:50:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:39,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:50:39,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:39,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:39,680 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:39,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454517621] [2022-11-03 03:50:39,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454517621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:39,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:39,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:50:39,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203717992] [2022-11-03 03:50:39,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:39,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:50:39,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:39,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:50:39,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:39,683 INFO L87 Difference]: Start difference. First operand 109 states and 148 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:39,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:39,806 INFO L93 Difference]: Finished difference Result 312 states and 444 transitions. [2022-11-03 03:50:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:50:39,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:39,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:39,809 INFO L225 Difference]: With dead ends: 312 [2022-11-03 03:50:39,809 INFO L226 Difference]: Without dead ends: 235 [2022-11-03 03:50:39,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:50:39,810 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 349 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:39,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 595 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-03 03:50:39,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 111. [2022-11-03 03:50:39,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.3636363636363635) internal successors, (150), 110 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:39,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 150 transitions. [2022-11-03 03:50:39,818 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 150 transitions. Word has length 80 [2022-11-03 03:50:39,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:39,818 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 150 transitions. [2022-11-03 03:50:39,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 150 transitions. [2022-11-03 03:50:39,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:39,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:39,820 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:39,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:40,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:40,035 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2076995791, now seen corresponding path program 1 times [2022-11-03 03:50:40,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:40,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507633282] [2022-11-03 03:50:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:40,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:40,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:40,038 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:40,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:50:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:40,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:40,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:40,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:40,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:40,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507633282] [2022-11-03 03:50:40,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507633282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:40,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:40,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:40,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144227066] [2022-11-03 03:50:40,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:40,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:40,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:40,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:40,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:40,416 INFO L87 Difference]: Start difference. First operand 111 states and 150 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:40,480 INFO L93 Difference]: Finished difference Result 307 states and 438 transitions. [2022-11-03 03:50:40,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:40,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:40,483 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:40,483 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:40,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:40,484 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 237 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:40,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 408 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 113. [2022-11-03 03:50:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3571428571428572) internal successors, (152), 112 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 152 transitions. [2022-11-03 03:50:40,491 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 152 transitions. Word has length 80 [2022-11-03 03:50:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:40,491 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 152 transitions. [2022-11-03 03:50:40,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 152 transitions. [2022-11-03 03:50:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:40,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:40,492 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:40,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:40,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:40,708 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1183509453, now seen corresponding path program 1 times [2022-11-03 03:50:40,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:40,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997741984] [2022-11-03 03:50:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:40,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:40,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:40,710 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:40,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:50:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:40,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:50:40,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:41,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:41,094 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:41,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997741984] [2022-11-03 03:50:41,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997741984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:41,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:41,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:50:41,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257591624] [2022-11-03 03:50:41,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:41,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:50:41,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:41,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:50:41,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:41,097 INFO L87 Difference]: Start difference. First operand 113 states and 152 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:41,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:41,215 INFO L93 Difference]: Finished difference Result 312 states and 442 transitions. [2022-11-03 03:50:41,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:50:41,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:41,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:41,217 INFO L225 Difference]: With dead ends: 312 [2022-11-03 03:50:41,217 INFO L226 Difference]: Without dead ends: 235 [2022-11-03 03:50:41,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:50:41,220 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 335 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:41,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 587 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-03 03:50:41,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 115. [2022-11-03 03:50:41,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.3508771929824561) internal successors, (154), 114 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 154 transitions. [2022-11-03 03:50:41,230 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 154 transitions. Word has length 80 [2022-11-03 03:50:41,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:41,231 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 154 transitions. [2022-11-03 03:50:41,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:41,231 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 154 transitions. [2022-11-03 03:50:41,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:41,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:41,232 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:41,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:41,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:41,447 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:41,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:41,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2080902731, now seen corresponding path program 1 times [2022-11-03 03:50:41,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:41,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464627474] [2022-11-03 03:50:41,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:41,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:41,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:41,450 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:41,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:50:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:41,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:41,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:41,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:41,801 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:41,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464627474] [2022-11-03 03:50:41,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464627474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:41,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:41,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:41,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517097594] [2022-11-03 03:50:41,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:41,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:41,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:41,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:41,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:41,803 INFO L87 Difference]: Start difference. First operand 115 states and 154 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:41,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:41,873 INFO L93 Difference]: Finished difference Result 307 states and 436 transitions. [2022-11-03 03:50:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:41,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:41,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:41,875 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:41,875 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:41,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:41,876 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 220 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:41,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 406 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 119. [2022-11-03 03:50:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.347457627118644) internal successors, (159), 118 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 159 transitions. [2022-11-03 03:50:41,883 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 159 transitions. Word has length 80 [2022-11-03 03:50:41,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:41,883 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 159 transitions. [2022-11-03 03:50:41,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 159 transitions. [2022-11-03 03:50:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:41,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:41,884 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:41,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:42,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:42,101 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:42,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:42,102 INFO L85 PathProgramCache]: Analyzing trace with hash 368697399, now seen corresponding path program 1 times [2022-11-03 03:50:42,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:42,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093050023] [2022-11-03 03:50:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:42,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:42,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:42,103 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:42,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:50:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:42,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:42,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:42,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:42,433 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:42,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093050023] [2022-11-03 03:50:42,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093050023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:42,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:42,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:42,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574421972] [2022-11-03 03:50:42,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:42,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:42,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:42,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:42,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:42,436 INFO L87 Difference]: Start difference. First operand 119 states and 159 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:42,495 INFO L93 Difference]: Finished difference Result 307 states and 435 transitions. [2022-11-03 03:50:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:42,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:42,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:42,498 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:42,498 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:42,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:42,500 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 214 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:42,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 417 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 121. [2022-11-03 03:50:42,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3416666666666666) internal successors, (161), 120 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:42,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 161 transitions. [2022-11-03 03:50:42,508 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 161 transitions. Word has length 80 [2022-11-03 03:50:42,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:42,509 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 161 transitions. [2022-11-03 03:50:42,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:42,509 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 161 transitions. [2022-11-03 03:50:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:42,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:42,511 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:42,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:42,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:42,728 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:42,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1028228921, now seen corresponding path program 1 times [2022-11-03 03:50:42,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:42,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33980344] [2022-11-03 03:50:42,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:42,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:42,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:42,730 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:42,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:50:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:42,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:42,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:43,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:43,078 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:43,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33980344] [2022-11-03 03:50:43,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33980344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:43,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:43,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:43,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135730662] [2022-11-03 03:50:43,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:43,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:43,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:43,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:43,081 INFO L87 Difference]: Start difference. First operand 121 states and 161 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:43,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:43,115 INFO L93 Difference]: Finished difference Result 307 states and 434 transitions. [2022-11-03 03:50:43,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:43,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:43,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:43,117 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:43,118 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:43,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:43,119 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 208 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:43,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 425 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 123. [2022-11-03 03:50:43,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.3360655737704918) internal successors, (163), 122 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2022-11-03 03:50:43,125 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 80 [2022-11-03 03:50:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:43,125 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2022-11-03 03:50:43,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2022-11-03 03:50:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:43,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:43,127 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:43,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:43,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:43,341 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:43,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:43,342 INFO L85 PathProgramCache]: Analyzing trace with hash 184223419, now seen corresponding path program 1 times [2022-11-03 03:50:43,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:43,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604345517] [2022-11-03 03:50:43,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:43,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:43,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:43,345 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:43,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:50:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:43,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:43,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:43,694 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:43,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604345517] [2022-11-03 03:50:43,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604345517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:43,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:43,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:43,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067145419] [2022-11-03 03:50:43,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:43,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:43,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:43,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:43,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:43,699 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:43,734 INFO L93 Difference]: Finished difference Result 307 states and 433 transitions. [2022-11-03 03:50:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:43,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:43,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:43,736 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:43,736 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:43,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:43,737 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 202 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:43,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 424 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:43,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:43,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 125. [2022-11-03 03:50:43,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3306451612903225) internal successors, (165), 124 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:43,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 165 transitions. [2022-11-03 03:50:43,745 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 165 transitions. Word has length 80 [2022-11-03 03:50:43,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:43,745 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 165 transitions. [2022-11-03 03:50:43,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 165 transitions. [2022-11-03 03:50:43,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:43,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:43,747 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:43,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:43,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:43,964 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:43,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:43,964 INFO L85 PathProgramCache]: Analyzing trace with hash 111836861, now seen corresponding path program 1 times [2022-11-03 03:50:43,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:43,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449315322] [2022-11-03 03:50:43,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:43,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:43,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:43,967 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:44,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 03:50:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:44,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:44,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:44,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:44,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:44,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449315322] [2022-11-03 03:50:44,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449315322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:44,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:44,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:44,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041449240] [2022-11-03 03:50:44,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:44,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:44,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:44,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:44,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:44,358 INFO L87 Difference]: Start difference. First operand 125 states and 165 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:44,405 INFO L93 Difference]: Finished difference Result 307 states and 432 transitions. [2022-11-03 03:50:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:44,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:44,408 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:44,408 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:44,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:44,410 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 191 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:44,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 420 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:44,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 129. [2022-11-03 03:50:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.328125) internal successors, (170), 128 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2022-11-03 03:50:44,423 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 80 [2022-11-03 03:50:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:44,423 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2022-11-03 03:50:44,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:44,424 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2022-11-03 03:50:44,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:44,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:44,425 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:44,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:44,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:44,642 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1498040255, now seen corresponding path program 1 times [2022-11-03 03:50:44,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:44,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866537913] [2022-11-03 03:50:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:44,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:44,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:44,645 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:44,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:50:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:44,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:44,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:45,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:45,025 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:45,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866537913] [2022-11-03 03:50:45,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866537913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:45,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:45,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:45,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520270360] [2022-11-03 03:50:45,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:45,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:45,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:45,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:45,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:45,028 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:45,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:45,066 INFO L93 Difference]: Finished difference Result 307 states and 431 transitions. [2022-11-03 03:50:45,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:45,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:45,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:45,068 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:45,068 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:45,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:45,070 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 180 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:45,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 422 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:45,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:45,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 133. [2022-11-03 03:50:45,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.3257575757575757) internal successors, (175), 132 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:45,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 175 transitions. [2022-11-03 03:50:45,077 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 175 transitions. Word has length 80 [2022-11-03 03:50:45,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:45,077 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 175 transitions. [2022-11-03 03:50:45,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 175 transitions. [2022-11-03 03:50:45,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:45,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:45,079 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:45,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:45,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:45,296 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:45,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:45,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1638588865, now seen corresponding path program 1 times [2022-11-03 03:50:45,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:45,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144775356] [2022-11-03 03:50:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:45,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:45,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:45,299 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:45,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:50:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:45,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:45,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:45,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:45,698 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:45,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144775356] [2022-11-03 03:50:45,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144775356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:45,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:45,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:45,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092559129] [2022-11-03 03:50:45,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:45,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:45,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:45,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:45,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:45,701 INFO L87 Difference]: Start difference. First operand 133 states and 175 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:45,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:45,743 INFO L93 Difference]: Finished difference Result 307 states and 430 transitions. [2022-11-03 03:50:45,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:45,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:45,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:45,746 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:45,746 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:45,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:45,750 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 169 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:45,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 418 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:45,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 137. [2022-11-03 03:50:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3235294117647058) internal successors, (180), 136 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 180 transitions. [2022-11-03 03:50:45,765 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 180 transitions. Word has length 80 [2022-11-03 03:50:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:45,766 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 180 transitions. [2022-11-03 03:50:45,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 180 transitions. [2022-11-03 03:50:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:45,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:45,768 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:45,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:45,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:45,983 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:45,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:45,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2061290691, now seen corresponding path program 1 times [2022-11-03 03:50:45,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:45,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668119727] [2022-11-03 03:50:45,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:45,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:45,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:45,985 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:45,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 03:50:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:46,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:46,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:46,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:46,340 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:46,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668119727] [2022-11-03 03:50:46,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668119727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:46,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:46,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:46,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763870552] [2022-11-03 03:50:46,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:46,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:46,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:46,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:46,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:46,342 INFO L87 Difference]: Start difference. First operand 137 states and 180 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:46,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:46,382 INFO L93 Difference]: Finished difference Result 307 states and 429 transitions. [2022-11-03 03:50:46,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:46,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:46,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:46,384 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:46,384 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:46,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:46,385 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 163 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:46,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 417 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:46,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:46,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 139. [2022-11-03 03:50:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.318840579710145) internal successors, (182), 138 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:46,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 182 transitions. [2022-11-03 03:50:46,392 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 182 transitions. Word has length 80 [2022-11-03 03:50:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:46,393 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 182 transitions. [2022-11-03 03:50:46,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:46,393 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 182 transitions. [2022-11-03 03:50:46,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:46,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:46,394 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:46,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 03:50:46,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:46,611 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:46,612 INFO L85 PathProgramCache]: Analyzing trace with hash 372346949, now seen corresponding path program 1 times [2022-11-03 03:50:46,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:46,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016015372] [2022-11-03 03:50:46,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:46,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:46,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:46,614 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:46,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:50:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:46,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:46,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:46,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:46,948 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:46,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016015372] [2022-11-03 03:50:46,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016015372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:46,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:46,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:46,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53970393] [2022-11-03 03:50:46,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:46,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:46,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:46,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:46,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:46,951 INFO L87 Difference]: Start difference. First operand 139 states and 182 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:46,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:46,997 INFO L93 Difference]: Finished difference Result 307 states and 428 transitions. [2022-11-03 03:50:46,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:46,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:46,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:47,000 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:47,000 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:47,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:47,001 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 157 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:47,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 416 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:47,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:47,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 141. [2022-11-03 03:50:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.3142857142857143) internal successors, (184), 140 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 184 transitions. [2022-11-03 03:50:47,009 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 184 transitions. Word has length 80 [2022-11-03 03:50:47,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:47,009 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 184 transitions. [2022-11-03 03:50:47,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:47,010 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 184 transitions. [2022-11-03 03:50:47,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:47,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:47,011 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:47,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:47,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:47,225 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:47,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1216000953, now seen corresponding path program 1 times [2022-11-03 03:50:47,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:47,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12765167] [2022-11-03 03:50:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:47,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:47,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:47,229 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:47,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:50:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:47,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:50:47,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:47,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:47,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:47,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12765167] [2022-11-03 03:50:47,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12765167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:47,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:47,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:47,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92296071] [2022-11-03 03:50:47,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:47,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:47,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:47,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:47,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:47,839 INFO L87 Difference]: Start difference. First operand 141 states and 184 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:47,920 INFO L93 Difference]: Finished difference Result 307 states and 427 transitions. [2022-11-03 03:50:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:47,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:47,926 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:47,926 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:47,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:47,928 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 151 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:47,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 382 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 143. [2022-11-03 03:50:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.3098591549295775) internal successors, (186), 142 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 186 transitions. [2022-11-03 03:50:47,935 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 186 transitions. Word has length 80 [2022-11-03 03:50:47,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:47,935 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 186 transitions. [2022-11-03 03:50:47,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 186 transitions. [2022-11-03 03:50:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:47,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:47,937 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:47,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:48,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:48,154 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:48,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1799102665, now seen corresponding path program 1 times [2022-11-03 03:50:48,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:48,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728757443] [2022-11-03 03:50:48,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:48,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:48,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:48,157 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:48,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 03:50:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:48,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:50:48,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:48,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:48,570 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:48,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728757443] [2022-11-03 03:50:48,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728757443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:48,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:48,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:50:48,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712665335] [2022-11-03 03:50:48,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:48,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:50:48,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:48,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:50:48,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:48,574 INFO L87 Difference]: Start difference. First operand 143 states and 186 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:48,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:48,685 INFO L93 Difference]: Finished difference Result 312 states and 431 transitions. [2022-11-03 03:50:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:50:48,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:48,692 INFO L225 Difference]: With dead ends: 312 [2022-11-03 03:50:48,692 INFO L226 Difference]: Without dead ends: 235 [2022-11-03 03:50:48,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:50:48,693 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 238 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:48,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 531 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-03 03:50:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 145. [2022-11-03 03:50:48,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.3055555555555556) internal successors, (188), 144 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2022-11-03 03:50:48,700 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 80 [2022-11-03 03:50:48,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:48,700 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2022-11-03 03:50:48,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2022-11-03 03:50:48,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:48,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:48,702 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:48,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 03:50:48,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:48,915 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:48,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:48,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1212296651, now seen corresponding path program 1 times [2022-11-03 03:50:48,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:48,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361667309] [2022-11-03 03:50:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:48,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:48,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:48,918 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:48,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:50:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:49,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:49,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:49,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:49,329 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:49,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361667309] [2022-11-03 03:50:49,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361667309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:49,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:49,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:49,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823122937] [2022-11-03 03:50:49,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:49,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:49,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:49,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:49,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:49,332 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:49,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:49,402 INFO L93 Difference]: Finished difference Result 307 states and 425 transitions. [2022-11-03 03:50:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:49,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:49,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:49,405 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:49,405 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:49,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:49,406 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 139 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:49,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 395 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:49,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:49,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 147. [2022-11-03 03:50:49,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.3013698630136987) internal successors, (190), 146 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:49,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2022-11-03 03:50:49,413 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 80 [2022-11-03 03:50:49,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:49,414 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2022-11-03 03:50:49,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:49,414 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2022-11-03 03:50:49,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:49,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:49,415 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:49,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:49,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:49,632 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:49,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1913361229, now seen corresponding path program 1 times [2022-11-03 03:50:49,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:49,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685857958] [2022-11-03 03:50:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:49,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:49,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:49,635 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:49,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 03:50:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:49,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:49,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:50,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:50,057 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:50,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685857958] [2022-11-03 03:50:50,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685857958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:50,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:50,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:50,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236730845] [2022-11-03 03:50:50,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:50,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:50,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:50,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:50,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:50,060 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:50,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:50,131 INFO L93 Difference]: Finished difference Result 307 states and 424 transitions. [2022-11-03 03:50:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:50,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:50,143 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:50,143 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:50,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:50,144 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 128 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:50,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 394 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:50,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 151. [2022-11-03 03:50:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.3) internal successors, (195), 150 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 195 transitions. [2022-11-03 03:50:50,156 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 195 transitions. Word has length 80 [2022-11-03 03:50:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:50,156 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 195 transitions. [2022-11-03 03:50:50,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:50,157 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 195 transitions. [2022-11-03 03:50:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:50,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:50,157 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:50,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:50,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:50,373 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:50,374 INFO L85 PathProgramCache]: Analyzing trace with hash -606598705, now seen corresponding path program 1 times [2022-11-03 03:50:50,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:50,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223977202] [2022-11-03 03:50:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:50,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:50,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:50,376 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:50,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 03:50:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:50,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:50:50,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:50,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:50,752 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:50,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223977202] [2022-11-03 03:50:50,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223977202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:50,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:50,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:50,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007108944] [2022-11-03 03:50:50,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:50,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:50,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:50,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:50,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:50,755 INFO L87 Difference]: Start difference. First operand 151 states and 195 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:50,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:50,822 INFO L93 Difference]: Finished difference Result 307 states and 423 transitions. [2022-11-03 03:50:50,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:50,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:50,825 INFO L225 Difference]: With dead ends: 307 [2022-11-03 03:50:50,825 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 03:50:50,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:50,826 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 122 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:50,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 393 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 03:50:50,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 153. [2022-11-03 03:50:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.2960526315789473) internal successors, (197), 152 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2022-11-03 03:50:50,832 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 80 [2022-11-03 03:50:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:50,833 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2022-11-03 03:50:50,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:50,833 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2022-11-03 03:50:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 03:50:50,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:50,834 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:50,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:51,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:51,061 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:51,062 INFO L85 PathProgramCache]: Analyzing trace with hash -604751663, now seen corresponding path program 1 times [2022-11-03 03:50:51,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:51,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139646867] [2022-11-03 03:50:51,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:51,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:51,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:51,064 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:51,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:50:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:51,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:50:51,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:52,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:53,848 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:53,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139646867] [2022-11-03 03:50:53,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139646867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:53,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1283366859] [2022-11-03 03:50:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:53,849 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:53,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:53,853 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:53,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 03:50:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:54,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:50:54,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:55,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:56,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1283366859] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:56,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015750486] [2022-11-03 03:50:56,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:56,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:56,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:56,302 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:50:56,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 03:50:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:56,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:50:56,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:57,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:50:58,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015750486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:58,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:50:58,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 14 [2022-11-03 03:50:58,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921269669] [2022-11-03 03:50:58,671 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:50:58,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 03:50:58,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:58,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 03:50:58,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:50:58,673 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:59,259 INFO L93 Difference]: Finished difference Result 299 states and 412 transitions. [2022-11-03 03:50:59,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:50:59,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 03:50:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:59,261 INFO L225 Difference]: With dead ends: 299 [2022-11-03 03:50:59,261 INFO L226 Difference]: Without dead ends: 297 [2022-11-03 03:50:59,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 457 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:50:59,262 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 1041 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:59,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1041 Valid, 1246 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 147 Invalid, 0 Unknown, 151 Unchecked, 0.3s Time] [2022-11-03 03:50:59,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-03 03:50:59,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 228. [2022-11-03 03:50:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.3568281938325992) internal successors, (308), 227 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 308 transitions. [2022-11-03 03:50:59,270 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 308 transitions. Word has length 80 [2022-11-03 03:50:59,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:59,271 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 308 transitions. [2022-11-03 03:50:59,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:59,271 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 308 transitions. [2022-11-03 03:50:59,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 03:50:59,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:59,273 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:59,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:59,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:59,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:59,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:59,888 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:59,888 INFO L85 PathProgramCache]: Analyzing trace with hash 713098965, now seen corresponding path program 1 times [2022-11-03 03:50:59,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:59,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524296587] [2022-11-03 03:50:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:59,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:59,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:59,890 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:59,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:51:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:00,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:51:00,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:51:00,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:51:01,357 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:01,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524296587] [2022-11-03 03:51:01,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524296587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:01,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1879501600] [2022-11-03 03:51:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:01,358 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:01,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:01,364 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:01,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 03:51:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:01,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:01,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:51:01,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:01,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1879501600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:01,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:01,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 14 [2022-11-03 03:51:01,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754660543] [2022-11-03 03:51:01,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:01,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:01,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:01,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:01,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:51:01,888 INFO L87 Difference]: Start difference. First operand 228 states and 308 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:02,038 INFO L93 Difference]: Finished difference Result 663 states and 925 transitions. [2022-11-03 03:51:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:51:02,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-11-03 03:51:02,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:02,042 INFO L225 Difference]: With dead ends: 663 [2022-11-03 03:51:02,042 INFO L226 Difference]: Without dead ends: 443 [2022-11-03 03:51:02,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 451 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:02,043 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 525 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:02,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 421 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:02,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-03 03:51:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 232. [2022-11-03 03:51:02,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.3463203463203464) internal successors, (311), 231 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 311 transitions. [2022-11-03 03:51:02,067 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 311 transitions. Word has length 155 [2022-11-03 03:51:02,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:02,067 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 311 transitions. [2022-11-03 03:51:02,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 311 transitions. [2022-11-03 03:51:02,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 03:51:02,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:02,069 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:02,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:02,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-11-03 03:51:02,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:02,470 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:02,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1670825773, now seen corresponding path program 1 times [2022-11-03 03:51:02,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:02,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96795504] [2022-11-03 03:51:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:02,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:02,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:02,473 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:02,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 03:51:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:51:02,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:51:03,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:51:03,887 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:03,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96795504] [2022-11-03 03:51:03,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96795504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:03,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1157489013] [2022-11-03 03:51:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:03,888 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:03,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:03,891 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:03,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 03:51:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:04,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:04,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:51:04,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:04,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1157489013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:04,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:04,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 14 [2022-11-03 03:51:04,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465715608] [2022-11-03 03:51:04,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:04,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:04,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:04,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:04,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:51:04,521 INFO L87 Difference]: Start difference. First operand 232 states and 311 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:04,696 INFO L93 Difference]: Finished difference Result 770 states and 1089 transitions. [2022-11-03 03:51:04,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:51:04,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-11-03 03:51:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:04,702 INFO L225 Difference]: With dead ends: 770 [2022-11-03 03:51:04,702 INFO L226 Difference]: Without dead ends: 614 [2022-11-03 03:51:04,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 452 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:04,705 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 285 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:04,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 692 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:04,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-11-03 03:51:04,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 292. [2022-11-03 03:51:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.3711340206185567) internal successors, (399), 291 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 399 transitions. [2022-11-03 03:51:04,721 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 399 transitions. Word has length 155 [2022-11-03 03:51:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:04,722 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 399 transitions. [2022-11-03 03:51:04,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 399 transitions. [2022-11-03 03:51:04,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 03:51:04,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:04,724 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:04,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:04,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-03 03:51:05,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:05,141 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:05,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:05,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2094472495, now seen corresponding path program 1 times [2022-11-03 03:51:05,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:05,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041640274] [2022-11-03 03:51:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:05,143 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:05,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:05,144 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:05,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 03:51:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:05,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:51:05,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:51:06,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:51:06,524 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:06,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041640274] [2022-11-03 03:51:06,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041640274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:06,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1377694605] [2022-11-03 03:51:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:06,525 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:06,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:06,531 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:06,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 03:51:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:06,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:06,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:51:07,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:07,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1377694605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:07,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:07,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 14 [2022-11-03 03:51:07,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520379645] [2022-11-03 03:51:07,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:07,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:07,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:07,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:07,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:51:07,062 INFO L87 Difference]: Start difference. First operand 292 states and 399 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:07,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:07,181 INFO L93 Difference]: Finished difference Result 796 states and 1127 transitions. [2022-11-03 03:51:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:51:07,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-11-03 03:51:07,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:07,185 INFO L225 Difference]: With dead ends: 796 [2022-11-03 03:51:07,185 INFO L226 Difference]: Without dead ends: 580 [2022-11-03 03:51:07,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 451 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:07,187 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 201 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:07,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 697 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:51:07,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-11-03 03:51:07,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 296. [2022-11-03 03:51:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.3661016949152542) internal successors, (403), 295 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 403 transitions. [2022-11-03 03:51:07,202 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 403 transitions. Word has length 155 [2022-11-03 03:51:07,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:07,202 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 403 transitions. [2022-11-03 03:51:07,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 403 transitions. [2022-11-03 03:51:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 03:51:07,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:07,204 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:07,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:07,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:07,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:07,619 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:07,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:07,620 INFO L85 PathProgramCache]: Analyzing trace with hash 277266767, now seen corresponding path program 1 times [2022-11-03 03:51:07,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:07,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357501344] [2022-11-03 03:51:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:07,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:07,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:07,622 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:07,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 03:51:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:07,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:51:07,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:51:08,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:51:08,945 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:08,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357501344] [2022-11-03 03:51:08,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357501344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:08,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1662039514] [2022-11-03 03:51:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:08,946 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:08,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:08,948 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:08,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 03:51:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:09,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:09,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:51:09,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:09,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1662039514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:09,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:09,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 14 [2022-11-03 03:51:09,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737633804] [2022-11-03 03:51:09,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:09,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:09,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:09,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:09,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:51:09,628 INFO L87 Difference]: Start difference. First operand 296 states and 403 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:09,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:09,780 INFO L93 Difference]: Finished difference Result 1154 states and 1649 transitions. [2022-11-03 03:51:09,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:51:09,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-11-03 03:51:09,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:09,786 INFO L225 Difference]: With dead ends: 1154 [2022-11-03 03:51:09,786 INFO L226 Difference]: Without dead ends: 934 [2022-11-03 03:51:09,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 452 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:09,788 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 397 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:09,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 680 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:09,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-11-03 03:51:09,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 496. [2022-11-03 03:51:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 1.404040404040404) internal successors, (695), 495 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 695 transitions. [2022-11-03 03:51:09,805 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 695 transitions. Word has length 155 [2022-11-03 03:51:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:09,805 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 695 transitions. [2022-11-03 03:51:09,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 695 transitions. [2022-11-03 03:51:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 03:51:09,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:09,808 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:09,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:10,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 03:51:10,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:10,212 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:10,213 INFO L85 PathProgramCache]: Analyzing trace with hash -402791603, now seen corresponding path program 1 times [2022-11-03 03:51:10,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:10,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753244628] [2022-11-03 03:51:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:10,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:10,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:10,215 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:10,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 03:51:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:10,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:51:10,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:51:11,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:51:11,503 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:11,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753244628] [2022-11-03 03:51:11,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753244628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:11,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1398201776] [2022-11-03 03:51:11,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:11,503 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:11,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:11,504 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:11,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 03:51:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:12,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:51:12,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:12,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:13,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1398201776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:13,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665276455] [2022-11-03 03:51:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:13,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:13,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:13,024 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:13,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 03:51:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:13,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:51:13,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:51:13,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:51:14,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665276455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:14,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:51:14,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 7, 7] total 33 [2022-11-03 03:51:14,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290485656] [2022-11-03 03:51:14,089 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:51:14,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 03:51:14,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:14,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 03:51:14,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 03:51:14,092 INFO L87 Difference]: Start difference. First operand 496 states and 695 transitions. Second operand has 33 states, 33 states have (on average 14.06060606060606) internal successors, (464), 33 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:31,368 INFO L93 Difference]: Finished difference Result 3322 states and 4749 transitions. [2022-11-03 03:51:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-11-03 03:51:31,370 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 14.06060606060606) internal successors, (464), 33 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-11-03 03:51:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:31,381 INFO L225 Difference]: With dead ends: 3322 [2022-11-03 03:51:31,381 INFO L226 Difference]: Without dead ends: 2842 [2022-11-03 03:51:31,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1105 GetRequests, 890 SyntacticMatches, 3 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19466 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=8720, Invalid=36862, Unknown=0, NotChecked=0, Total=45582 [2022-11-03 03:51:31,395 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 14145 mSDsluCounter, 3546 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14145 SdHoareTripleChecker+Valid, 3686 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:31,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14145 Valid, 3686 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 03:51:31,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2022-11-03 03:51:31,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 487. [2022-11-03 03:51:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.3806584362139918) internal successors, (671), 486 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:31,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 671 transitions. [2022-11-03 03:51:31,456 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 671 transitions. Word has length 155 [2022-11-03 03:51:31,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:31,457 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 671 transitions. [2022-11-03 03:51:31,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 14.06060606060606) internal successors, (464), 33 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:31,457 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 671 transitions. [2022-11-03 03:51:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:51:31,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:31,459 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-03 03:51:31,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:31,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 03:51:31,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:32,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:32,066 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:32,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:32,067 INFO L85 PathProgramCache]: Analyzing trace with hash 971340107, now seen corresponding path program 1 times [2022-11-03 03:51:32,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:32,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016865651] [2022-11-03 03:51:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:32,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:32,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:32,071 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:32,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 03:51:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:32,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:51:32,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:32,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 165 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:33,016 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:33,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016865651] [2022-11-03 03:51:33,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016865651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:33,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1504233435] [2022-11-03 03:51:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:33,017 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:33,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:33,018 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:33,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 03:51:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:33,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:33,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 03:51:33,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:33,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1504233435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:33,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:33,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 03:51:33,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43679758] [2022-11-03 03:51:33,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:33,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:33,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:33,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:33,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:51:33,722 INFO L87 Difference]: Start difference. First operand 487 states and 671 transitions. Second operand has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:33,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:33,833 INFO L93 Difference]: Finished difference Result 1077 states and 1512 transitions. [2022-11-03 03:51:33,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:51:33,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:51:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:33,837 INFO L225 Difference]: With dead ends: 1077 [2022-11-03 03:51:33,837 INFO L226 Difference]: Without dead ends: 666 [2022-11-03 03:51:33,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:33,839 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 565 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:33,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 433 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:33,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-11-03 03:51:33,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 487. [2022-11-03 03:51:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.3703703703703705) internal successors, (666), 486 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 666 transitions. [2022-11-03 03:51:33,856 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 666 transitions. Word has length 230 [2022-11-03 03:51:33,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:33,857 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 666 transitions. [2022-11-03 03:51:33,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 666 transitions. [2022-11-03 03:51:33,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:51:33,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:33,859 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:33,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:34,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-03 03:51:34,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:34,264 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:34,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1432157173, now seen corresponding path program 1 times [2022-11-03 03:51:34,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:34,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844120151] [2022-11-03 03:51:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:34,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:34,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:34,267 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:34,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 03:51:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:34,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:51:34,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:34,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 165 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:35,202 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:35,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844120151] [2022-11-03 03:51:35,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844120151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:35,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [482707831] [2022-11-03 03:51:35,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:35,203 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:35,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:35,204 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:35,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-03 03:51:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:35,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:35,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 03:51:35,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:35,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [482707831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:35,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:35,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 03:51:35,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942448287] [2022-11-03 03:51:35,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:35,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:35,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:35,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:35,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:51:35,925 INFO L87 Difference]: Start difference. First operand 487 states and 666 transitions. Second operand has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:36,056 INFO L93 Difference]: Finished difference Result 1324 states and 1856 transitions. [2022-11-03 03:51:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:51:36,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:51:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:36,064 INFO L225 Difference]: With dead ends: 1324 [2022-11-03 03:51:36,064 INFO L226 Difference]: Without dead ends: 913 [2022-11-03 03:51:36,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:36,072 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 544 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:36,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 411 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-11-03 03:51:36,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 487. [2022-11-03 03:51:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.3621399176954732) internal successors, (662), 486 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 662 transitions. [2022-11-03 03:51:36,090 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 662 transitions. Word has length 230 [2022-11-03 03:51:36,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:36,091 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 662 transitions. [2022-11-03 03:51:36,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:36,091 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 662 transitions. [2022-11-03 03:51:36,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:51:36,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:36,093 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:36,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:36,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:36,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:36,507 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:36,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1770174921, now seen corresponding path program 2 times [2022-11-03 03:51:36,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:36,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830982504] [2022-11-03 03:51:36,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:51:36,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:36,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:36,511 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:36,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 03:51:36,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:51:36,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:51:36,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:51:36,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:37,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 165 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:37,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:37,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830982504] [2022-11-03 03:51:37,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830982504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:37,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [321522990] [2022-11-03 03:51:37,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:51:37,491 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:37,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:37,495 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:37,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-03 03:51:38,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:51:38,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:51:38,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:38,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 03:51:38,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:38,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [321522990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:38,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:38,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 03:51:38,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446563794] [2022-11-03 03:51:38,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:38,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:38,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:38,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:38,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:51:38,276 INFO L87 Difference]: Start difference. First operand 487 states and 662 transitions. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:38,386 INFO L93 Difference]: Finished difference Result 1085 states and 1502 transitions. [2022-11-03 03:51:38,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:51:38,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:51:38,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:38,389 INFO L225 Difference]: With dead ends: 1085 [2022-11-03 03:51:38,389 INFO L226 Difference]: Without dead ends: 674 [2022-11-03 03:51:38,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:38,390 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 565 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:38,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 432 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:51:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-03 03:51:38,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 487. [2022-11-03 03:51:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.3518518518518519) internal successors, (657), 486 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 657 transitions. [2022-11-03 03:51:38,409 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 657 transitions. Word has length 230 [2022-11-03 03:51:38,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:38,409 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 657 transitions. [2022-11-03 03:51:38,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 657 transitions. [2022-11-03 03:51:38,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:51:38,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:38,412 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:38,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:38,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:38,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:38,817 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:38,817 INFO L85 PathProgramCache]: Analyzing trace with hash -969694071, now seen corresponding path program 1 times [2022-11-03 03:51:38,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:38,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688555281] [2022-11-03 03:51:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:38,819 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:38,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:38,820 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:38,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 03:51:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:39,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:51:39,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:39,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 165 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:39,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:39,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688555281] [2022-11-03 03:51:39,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688555281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:39,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1086688793] [2022-11-03 03:51:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:39,768 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:39,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:39,771 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:39,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-03 03:51:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:40,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:40,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 03:51:40,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:40,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1086688793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:40,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:40,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 03:51:40,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002072411] [2022-11-03 03:51:40,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:40,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:40,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:40,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:40,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:51:40,505 INFO L87 Difference]: Start difference. First operand 487 states and 657 transitions. Second operand has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:40,618 INFO L93 Difference]: Finished difference Result 1342 states and 1858 transitions. [2022-11-03 03:51:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:51:40,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:51:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:40,621 INFO L225 Difference]: With dead ends: 1342 [2022-11-03 03:51:40,621 INFO L226 Difference]: Without dead ends: 931 [2022-11-03 03:51:40,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:40,622 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 542 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:40,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 413 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:40,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-11-03 03:51:40,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 493. [2022-11-03 03:51:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.3455284552845528) internal successors, (662), 492 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 662 transitions. [2022-11-03 03:51:40,637 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 662 transitions. Word has length 230 [2022-11-03 03:51:40,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:40,638 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 662 transitions. [2022-11-03 03:51:40,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 662 transitions. [2022-11-03 03:51:40,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:51:40,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:40,640 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:40,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-03 03:51:40,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-11-03 03:51:41,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:41,055 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1032192199, now seen corresponding path program 2 times [2022-11-03 03:51:41,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:41,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439814325] [2022-11-03 03:51:41,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:51:41,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:41,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:41,058 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:41,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 03:51:41,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:51:41,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:51:41,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:51:41,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:41,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 165 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:41,981 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:41,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439814325] [2022-11-03 03:51:41,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439814325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:41,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1014798062] [2022-11-03 03:51:41,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:51:41,981 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:41,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:41,982 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:41,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-03 03:51:42,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:51:42,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:51:42,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:42,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:51:42,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:42,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1014798062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:42,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:42,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 03:51:42,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523195334] [2022-11-03 03:51:42,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:42,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:42,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:42,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:42,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:51:42,735 INFO L87 Difference]: Start difference. First operand 493 states and 662 transitions. Second operand has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:42,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:42,838 INFO L93 Difference]: Finished difference Result 1894 states and 2616 transitions. [2022-11-03 03:51:42,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:51:42,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:51:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:42,842 INFO L225 Difference]: With dead ends: 1894 [2022-11-03 03:51:42,842 INFO L226 Difference]: Without dead ends: 1477 [2022-11-03 03:51:42,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:42,844 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 518 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:42,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 441 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:51:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2022-11-03 03:51:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 757. [2022-11-03 03:51:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 1.3611111111111112) internal successors, (1029), 756 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:42,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1029 transitions. [2022-11-03 03:51:42,867 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1029 transitions. Word has length 230 [2022-11-03 03:51:42,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:42,867 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 1029 transitions. [2022-11-03 03:51:42,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:42,868 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1029 transitions. [2022-11-03 03:51:42,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:51:42,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:42,870 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-03 03:51:42,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:43,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2022-11-03 03:51:43,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:43,287 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:43,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:43,287 INFO L85 PathProgramCache]: Analyzing trace with hash -584655993, now seen corresponding path program 1 times [2022-11-03 03:51:43,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:43,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208869559] [2022-11-03 03:51:43,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:43,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:43,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:43,290 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:43,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 03:51:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:43,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:51:43,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:43,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 165 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:44,188 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:44,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208869559] [2022-11-03 03:51:44,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208869559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:44,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [28743799] [2022-11-03 03:51:44,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:44,189 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:44,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:44,190 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:44,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-03 03:51:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:44,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:44,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:51:44,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:44,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [28743799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:44,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:44,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 03:51:44,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277587758] [2022-11-03 03:51:44,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:44,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:44,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:44,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:44,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:51:44,949 INFO L87 Difference]: Start difference. First operand 757 states and 1029 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:45,063 INFO L93 Difference]: Finished difference Result 1809 states and 2493 transitions. [2022-11-03 03:51:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:51:45,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:51:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:45,066 INFO L225 Difference]: With dead ends: 1809 [2022-11-03 03:51:45,066 INFO L226 Difference]: Without dead ends: 1128 [2022-11-03 03:51:45,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:45,067 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 579 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:45,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 431 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:45,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-11-03 03:51:45,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 757. [2022-11-03 03:51:45,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 1.3571428571428572) internal successors, (1026), 756 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1026 transitions. [2022-11-03 03:51:45,103 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1026 transitions. Word has length 230 [2022-11-03 03:51:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:45,103 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 1026 transitions. [2022-11-03 03:51:45,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1026 transitions. [2022-11-03 03:51:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:51:45,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:45,105 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-03 03:51:45,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:45,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:45,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:45,510 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:45,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:45,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2128811591, now seen corresponding path program 1 times [2022-11-03 03:51:45,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:45,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942133464] [2022-11-03 03:51:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:45,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:45,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:45,513 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:45,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 03:51:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:45,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:51:45,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:46,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 165 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:46,420 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:46,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942133464] [2022-11-03 03:51:46,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942133464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:46,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [574303785] [2022-11-03 03:51:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:46,420 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:46,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:46,421 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:46,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-03 03:51:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:47,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:47,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:51:47,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:47,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [574303785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:47,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:47,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 03:51:47,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638274643] [2022-11-03 03:51:47,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:47,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:47,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:47,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:47,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:51:47,212 INFO L87 Difference]: Start difference. First operand 757 states and 1026 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:47,356 INFO L93 Difference]: Finished difference Result 2326 states and 3215 transitions. [2022-11-03 03:51:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:51:47,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:51:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:47,362 INFO L225 Difference]: With dead ends: 2326 [2022-11-03 03:51:47,363 INFO L226 Difference]: Without dead ends: 1645 [2022-11-03 03:51:47,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:47,365 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 562 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:47,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 404 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:47,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-11-03 03:51:47,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 919. [2022-11-03 03:51:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.3660130718954249) internal successors, (1254), 918 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:47,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1254 transitions. [2022-11-03 03:51:47,390 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1254 transitions. Word has length 230 [2022-11-03 03:51:47,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:47,391 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1254 transitions. [2022-11-03 03:51:47,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:47,392 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1254 transitions. [2022-11-03 03:51:47,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:51:47,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:47,394 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-03 03:51:47,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:47,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-11-03 03:51:47,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:47,812 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash 170236805, now seen corresponding path program 2 times [2022-11-03 03:51:47,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:47,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440393060] [2022-11-03 03:51:47,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:51:47,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:47,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:47,815 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:47,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 03:51:48,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:51:48,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:51:48,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:51:48,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:48,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 165 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:48,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:48,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440393060] [2022-11-03 03:51:48,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440393060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:48,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1098691308] [2022-11-03 03:51:48,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:51:48,749 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:48,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:48,751 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:48,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-03 03:51:49,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:51:49,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:51:49,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:49,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:51:49,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:49,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1098691308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:49,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:49,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 03:51:49,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296735909] [2022-11-03 03:51:49,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:49,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:49,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:49,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:49,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:51:49,547 INFO L87 Difference]: Start difference. First operand 919 states and 1254 transitions. Second operand has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:49,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:49,677 INFO L93 Difference]: Finished difference Result 2500 states and 3454 transitions. [2022-11-03 03:51:49,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:51:49,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:51:49,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:49,681 INFO L225 Difference]: With dead ends: 2500 [2022-11-03 03:51:49,681 INFO L226 Difference]: Without dead ends: 1657 [2022-11-03 03:51:49,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:49,683 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 561 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:49,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 403 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2022-11-03 03:51:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 929. [2022-11-03 03:51:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 1.363146551724138) internal successors, (1265), 928 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1265 transitions. [2022-11-03 03:51:49,709 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1265 transitions. Word has length 230 [2022-11-03 03:51:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:49,710 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1265 transitions. [2022-11-03 03:51:49,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1265 transitions. [2022-11-03 03:51:49,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:51:49,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:49,713 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-03 03:51:49,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2022-11-03 03:51:49,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-03 03:51:50,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:50,118 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1736994755, now seen corresponding path program 3 times [2022-11-03 03:51:50,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:50,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15726526] [2022-11-03 03:51:50,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:51:50,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:50,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:50,121 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:50,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 03:51:50,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:51:50,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:51:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:51:50,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 03:51:50,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 104 proven. 10 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 03:51:51,041 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:51,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15726526] [2022-11-03 03:51:51,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15726526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:51,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2099180841] [2022-11-03 03:51:51,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:51:51,041 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:51,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:51,043 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:51,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-03 03:51:51,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:51:51,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:51:51,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:51:51,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 60 proven. 6 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-03 03:51:52,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 60 proven. 6 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-03 03:51:52,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2099180841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:52,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129377908] [2022-11-03 03:51:52,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:51:52,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:52,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:52,881 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:52,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-03 03:51:53,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:51:53,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:51:53,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:51:53,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-03 03:51:53,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 104 proven. 18 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-03 03:51:53,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129377908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:53,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:51:53,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6, 6, 7, 8] total 17 [2022-11-03 03:51:53,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664314212] [2022-11-03 03:51:53,874 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:51:53,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 03:51:53,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:53,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 03:51:53,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:53,876 INFO L87 Difference]: Start difference. First operand 929 states and 1265 transitions. Second operand has 17 states, 17 states have (on average 21.647058823529413) internal successors, (368), 17 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:55,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:55,576 INFO L93 Difference]: Finished difference Result 6343 states and 8670 transitions. [2022-11-03 03:51:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 03:51:55,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 21.647058823529413) internal successors, (368), 17 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:51:55,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:55,593 INFO L225 Difference]: With dead ends: 6343 [2022-11-03 03:51:55,593 INFO L226 Difference]: Without dead ends: 5490 [2022-11-03 03:51:55,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1403 GetRequests, 1357 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1460, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 03:51:55,597 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 1317 mSDsluCounter, 2189 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 2536 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:55,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1317 Valid, 2536 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:51:55,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5490 states. [2022-11-03 03:51:55,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5490 to 1013. [2022-11-03 03:51:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 1.3468379446640317) internal successors, (1363), 1012 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1363 transitions. [2022-11-03 03:51:55,645 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1363 transitions. Word has length 230 [2022-11-03 03:51:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:55,645 INFO L495 AbstractCegarLoop]: Abstraction has 1013 states and 1363 transitions. [2022-11-03 03:51:55,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 21.647058823529413) internal successors, (368), 17 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1363 transitions. [2022-11-03 03:51:55,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:51:55,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:55,648 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:55,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:55,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-11-03 03:51:56,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-03 03:51:56,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:56,263 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:56,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1674442051, now seen corresponding path program 1 times [2022-11-03 03:51:56,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:56,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125268273] [2022-11-03 03:51:56,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:56,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:56,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:56,266 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:56,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 03:51:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:56,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:51:56,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:56,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 165 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:57,166 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:57,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125268273] [2022-11-03 03:51:57,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125268273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:57,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [740919816] [2022-11-03 03:51:57,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:57,167 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:57,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:57,168 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:57,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-03 03:51:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:57,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:57,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:51:57,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:57,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [740919816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:57,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:57,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 03:51:57,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207085288] [2022-11-03 03:51:57,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:57,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:51:57,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:57,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:51:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:51:57,960 INFO L87 Difference]: Start difference. First operand 1013 states and 1363 transitions. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:58,116 INFO L93 Difference]: Finished difference Result 2754 states and 3746 transitions. [2022-11-03 03:51:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:51:58,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:51:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:58,140 INFO L225 Difference]: With dead ends: 2754 [2022-11-03 03:51:58,140 INFO L226 Difference]: Without dead ends: 1817 [2022-11-03 03:51:58,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:51:58,143 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 559 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:58,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 402 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:58,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-11-03 03:51:58,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1007. [2022-11-03 03:51:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 1.3469184890656063) internal successors, (1355), 1006 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1355 transitions. [2022-11-03 03:51:58,183 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1355 transitions. Word has length 230 [2022-11-03 03:51:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:58,184 INFO L495 AbstractCegarLoop]: Abstraction has 1007 states and 1355 transitions. [2022-11-03 03:51:58,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1355 transitions. [2022-11-03 03:51:58,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:51:58,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:58,187 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:58,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:58,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-03 03:51:58,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:58,592 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:58,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:58,593 INFO L85 PathProgramCache]: Analyzing trace with hash 531939585, now seen corresponding path program 2 times [2022-11-03 03:51:58,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:58,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646369528] [2022-11-03 03:51:58,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:51:58,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:58,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:58,596 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:58,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 03:51:58,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:51:58,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:51:58,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:51:58,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:59,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 165 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:51:59,514 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:59,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646369528] [2022-11-03 03:51:59,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646369528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:59,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1952274127] [2022-11-03 03:51:59,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:51:59,515 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:59,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:59,516 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:59,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-03 03:52:00,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:52:00,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:52:00,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:52:00,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:52:00,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 165 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 03:52:00,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1952274127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722039265] [2022-11-03 03:52:00,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:52:00,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:00,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:00,753 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:00,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-03 03:52:01,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:52:01,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:52:01,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:52:01,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 124 proven. 96 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:52:01,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 124 proven. 96 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:52:02,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722039265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:02,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:52:02,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 12, 12] total 31 [2022-11-03 03:52:02,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615438716] [2022-11-03 03:52:02,455 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:52:02,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 03:52:02,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:02,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 03:52:02,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2022-11-03 03:52:02,458 INFO L87 Difference]: Start difference. First operand 1007 states and 1355 transitions. Second operand has 31 states, 31 states have (on average 17.225806451612904) internal successors, (534), 31 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:06,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:06,492 INFO L93 Difference]: Finished difference Result 7907 states and 10663 transitions. [2022-11-03 03:52:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-03 03:52:06,493 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 17.225806451612904) internal successors, (534), 31 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:52:06,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:06,501 INFO L225 Difference]: With dead ends: 7907 [2022-11-03 03:52:06,501 INFO L226 Difference]: Without dead ends: 6938 [2022-11-03 03:52:06,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1430 GetRequests, 1345 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1000, Invalid=6482, Unknown=0, NotChecked=0, Total=7482 [2022-11-03 03:52:06,505 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 5757 mSDsluCounter, 8433 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5757 SdHoareTripleChecker+Valid, 9127 SdHoareTripleChecker+Invalid, 2094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:06,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5757 Valid, 9127 Invalid, 2094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 03:52:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6938 states. [2022-11-03 03:52:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6938 to 2521. [2022-11-03 03:52:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2521 states, 2520 states have (on average 1.3476190476190477) internal successors, (3396), 2520 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2521 states to 2521 states and 3396 transitions. [2022-11-03 03:52:06,593 INFO L78 Accepts]: Start accepts. Automaton has 2521 states and 3396 transitions. Word has length 230 [2022-11-03 03:52:06,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:06,593 INFO L495 AbstractCegarLoop]: Abstraction has 2521 states and 3396 transitions. [2022-11-03 03:52:06,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 17.225806451612904) internal successors, (534), 31 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2521 states and 3396 transitions. [2022-11-03 03:52:06,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:52:06,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:06,598 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:06,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:06,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2022-11-03 03:52:07,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-03 03:52:07,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:52:07,215 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:07,216 INFO L85 PathProgramCache]: Analyzing trace with hash -8489921, now seen corresponding path program 3 times [2022-11-03 03:52:07,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:07,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283560389] [2022-11-03 03:52:07,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:52:07,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:07,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:07,218 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:07,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 03:52:07,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:52:07,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:52:07,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 03:52:07,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 03:52:12,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 03:52:17,285 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:17,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283560389] [2022-11-03 03:52:17,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283560389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:17,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1751635128] [2022-11-03 03:52:17,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:52:17,286 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:17,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:17,287 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:17,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-03 03:52:17,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:52:17,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:52:17,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 03:52:17,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 03:52:22,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 03:52:26,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1751635128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:26,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251571712] [2022-11-03 03:52:26,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:52:26,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:26,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:26,282 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:26,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-03 03:52:26,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:52:26,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:52:26,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 03:52:26,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 03:52:32,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 03:52:39,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251571712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:39,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:52:39,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 17, 17] total 46 [2022-11-03 03:52:39,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039389426] [2022-11-03 03:52:39,367 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:52:39,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 03:52:39,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:39,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 03:52:39,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1892, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 03:52:39,369 INFO L87 Difference]: Start difference. First operand 2521 states and 3396 transitions. Second operand has 46 states, 46 states have (on average 12.08695652173913) internal successors, (556), 46 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:40,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:40,330 INFO L93 Difference]: Finished difference Result 5097 states and 6906 transitions. [2022-11-03 03:52:40,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:52:40,332 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 12.08695652173913) internal successors, (556), 46 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:52:40,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:40,341 INFO L225 Difference]: With dead ends: 5097 [2022-11-03 03:52:40,341 INFO L226 Difference]: Without dead ends: 5095 [2022-11-03 03:52:40,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1379 GetRequests, 1325 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=227, Invalid=2323, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 03:52:40,345 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 577 mSDsluCounter, 5981 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 6252 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 564 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:40,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 6252 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 564 Unchecked, 0.1s Time] [2022-11-03 03:52:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5095 states. [2022-11-03 03:52:40,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5095 to 3117. [2022-11-03 03:52:40,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3116 states have (on average 1.3449935815147624) internal successors, (4191), 3116 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 4191 transitions. [2022-11-03 03:52:40,451 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 4191 transitions. Word has length 230 [2022-11-03 03:52:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:40,452 INFO L495 AbstractCegarLoop]: Abstraction has 3117 states and 4191 transitions. [2022-11-03 03:52:40,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 12.08695652173913) internal successors, (556), 46 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:40,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 4191 transitions. [2022-11-03 03:52:40,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:52:40,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:40,457 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-03 03:52:40,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:40,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-11-03 03:52:40,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-03 03:52:41,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:52:41,063 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:41,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:41,063 INFO L85 PathProgramCache]: Analyzing trace with hash 311074749, now seen corresponding path program 1 times [2022-11-03 03:52:41,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:41,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007503562] [2022-11-03 03:52:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:41,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:41,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:41,065 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:41,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 03:52:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:41,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:52:41,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 18 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 03:52:41,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 171 proven. 1 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 03:52:42,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:42,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007503562] [2022-11-03 03:52:42,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007503562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:42,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [409384059] [2022-11-03 03:52:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:42,035 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:42,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:42,037 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:42,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-03 03:52:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:42,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:52:42,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 18 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 03:52:43,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 171 proven. 1 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 03:52:43,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [409384059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:43,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593425230] [2022-11-03 03:52:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:43,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:43,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:43,343 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:43,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-03 03:52:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:43,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:52:43,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 22 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 03:52:44,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 22 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 03:52:44,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593425230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:44,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:52:44,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 13, 12] total 30 [2022-11-03 03:52:44,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184677955] [2022-11-03 03:52:44,858 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:52:44,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 03:52:44,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:44,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 03:52:44,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:52:44,860 INFO L87 Difference]: Start difference. First operand 3117 states and 4191 transitions. Second operand has 30 states, 30 states have (on average 14.466666666666667) internal successors, (434), 30 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:51,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:51,441 INFO L93 Difference]: Finished difference Result 64475 states and 87019 transitions. [2022-11-03 03:52:51,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-03 03:52:51,442 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 14.466666666666667) internal successors, (434), 30 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:52:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:51,561 INFO L225 Difference]: With dead ends: 64475 [2022-11-03 03:52:51,562 INFO L226 Difference]: Without dead ends: 61424 [2022-11-03 03:52:51,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1467 GetRequests, 1346 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4824 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2868, Invalid=12138, Unknown=0, NotChecked=0, Total=15006 [2022-11-03 03:52:51,581 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 5869 mSDsluCounter, 6642 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5869 SdHoareTripleChecker+Valid, 6895 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:51,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5869 Valid, 6895 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 03:52:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61424 states. [2022-11-03 03:52:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61424 to 12436. [2022-11-03 03:52:52,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12436 states, 12435 states have (on average 1.337675914756735) internal successors, (16634), 12435 states have internal predecessors, (16634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12436 states to 12436 states and 16634 transitions. [2022-11-03 03:52:52,465 INFO L78 Accepts]: Start accepts. Automaton has 12436 states and 16634 transitions. Word has length 230 [2022-11-03 03:52:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:52,466 INFO L495 AbstractCegarLoop]: Abstraction has 12436 states and 16634 transitions. [2022-11-03 03:52:52,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 14.466666666666667) internal successors, (434), 30 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 12436 states and 16634 transitions. [2022-11-03 03:52:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:52:52,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:52,481 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-03 03:52:52,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:52,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Ended with exit code 0 [2022-11-03 03:52:52,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-11-03 03:52:53,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:53,103 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:53,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:53,103 INFO L85 PathProgramCache]: Analyzing trace with hash -730838147, now seen corresponding path program 1 times [2022-11-03 03:52:53,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:53,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385058332] [2022-11-03 03:52:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:53,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:53,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:53,105 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:53,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-03 03:52:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:53,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:52:53,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 03:52:54,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 03:52:54,509 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:54,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385058332] [2022-11-03 03:52:54,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385058332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:54,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [356386366] [2022-11-03 03:52:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:54,509 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:54,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:54,511 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:54,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2022-11-03 03:52:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:55,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:52:55,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 03:52:55,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:52:55,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [356386366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:55,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:52:55,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 13] total 27 [2022-11-03 03:52:55,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780820161] [2022-11-03 03:52:55,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:55,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:52:55,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:55,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:52:55,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:52:55,186 INFO L87 Difference]: Start difference. First operand 12436 states and 16634 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:55,503 INFO L93 Difference]: Finished difference Result 30709 states and 41081 transitions. [2022-11-03 03:52:55,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:52:55,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:52:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:55,537 INFO L225 Difference]: With dead ends: 30709 [2022-11-03 03:52:55,538 INFO L226 Difference]: Without dead ends: 18339 [2022-11-03 03:52:55,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:52:55,548 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 468 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:55,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 463 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:52:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18339 states. [2022-11-03 03:52:55,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18339 to 12780. [2022-11-03 03:52:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12780 states, 12779 states have (on average 1.3184912747476327) internal successors, (16849), 12779 states have internal predecessors, (16849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12780 states to 12780 states and 16849 transitions. [2022-11-03 03:52:55,931 INFO L78 Accepts]: Start accepts. Automaton has 12780 states and 16849 transitions. Word has length 230 [2022-11-03 03:52:55,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:55,931 INFO L495 AbstractCegarLoop]: Abstraction has 12780 states and 16849 transitions. [2022-11-03 03:52:55,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:55,932 INFO L276 IsEmpty]: Start isEmpty. Operand 12780 states and 16849 transitions. [2022-11-03 03:52:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:52:55,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:55,947 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:55,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:56,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (76)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:56,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:56,368 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:56,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1331107389, now seen corresponding path program 1 times [2022-11-03 03:52:56,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:56,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782269967] [2022-11-03 03:52:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:56,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:56,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:56,372 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:56,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 03:52:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:56,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:52:56,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 03:52:57,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 03:52:57,850 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:52:57,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782269967] [2022-11-03 03:52:57,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782269967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:57,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [824107112] [2022-11-03 03:52:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:57,851 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:57,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:52:57,852 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:52:57,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-03 03:52:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:58,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:52:58,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 03:52:58,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:52:58,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [824107112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:58,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:52:58,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 13] total 27 [2022-11-03 03:52:58,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876932281] [2022-11-03 03:52:58,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:58,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:52:58,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:52:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:52:58,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:52:58,573 INFO L87 Difference]: Start difference. First operand 12780 states and 16849 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:58,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:58,909 INFO L93 Difference]: Finished difference Result 36610 states and 48319 transitions. [2022-11-03 03:52:58,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:52:58,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:52:58,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:58,949 INFO L225 Difference]: With dead ends: 36610 [2022-11-03 03:52:58,949 INFO L226 Difference]: Without dead ends: 23896 [2022-11-03 03:52:58,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:52:58,965 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 427 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:58,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 487 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:52:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23896 states. [2022-11-03 03:52:59,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23896 to 12952. [2022-11-03 03:52:59,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12952 states, 12951 states have (on average 1.3076210331248552) internal successors, (16935), 12951 states have internal predecessors, (16935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12952 states to 12952 states and 16935 transitions. [2022-11-03 03:52:59,521 INFO L78 Accepts]: Start accepts. Automaton has 12952 states and 16935 transitions. Word has length 230 [2022-11-03 03:52:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:59,522 INFO L495 AbstractCegarLoop]: Abstraction has 12952 states and 16935 transitions. [2022-11-03 03:52:59,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 12952 states and 16935 transitions. [2022-11-03 03:52:59,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:52:59,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:59,536 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:59,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:59,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:59,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:52:59,958 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:59,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash 901449083, now seen corresponding path program 2 times [2022-11-03 03:52:59,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:52:59,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122274490] [2022-11-03 03:52:59,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:52:59,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:52:59,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:52:59,960 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:52:59,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 03:53:00,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:53:00,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:53:00,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:53:00,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 03:53:00,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 03:53:01,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:01,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122274490] [2022-11-03 03:53:01,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122274490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:01,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1278210701] [2022-11-03 03:53:01,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:53:01,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:01,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:01,387 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:01,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-03 03:53:01,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:53:01,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:53:02,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:53:02,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 03:53:02,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:02,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1278210701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:02,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:53:02,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 13] total 27 [2022-11-03 03:53:02,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777398922] [2022-11-03 03:53:02,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:02,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:53:02,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:02,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:53:02,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:53:02,126 INFO L87 Difference]: Start difference. First operand 12952 states and 16935 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:02,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:02,435 INFO L93 Difference]: Finished difference Result 39190 states and 51137 transitions. [2022-11-03 03:53:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:53:02,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:53:02,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:02,470 INFO L225 Difference]: With dead ends: 39190 [2022-11-03 03:53:02,470 INFO L226 Difference]: Without dead ends: 26304 [2022-11-03 03:53:02,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:53:02,485 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 431 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:02,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 488 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:53:02,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26304 states. [2022-11-03 03:53:02,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26304 to 14156. [2022-11-03 03:53:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14156 states, 14155 states have (on average 1.2929000353232074) internal successors, (18301), 14155 states have internal predecessors, (18301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:02,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14156 states to 14156 states and 18301 transitions. [2022-11-03 03:53:02,970 INFO L78 Accepts]: Start accepts. Automaton has 14156 states and 18301 transitions. Word has length 230 [2022-11-03 03:53:02,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:02,970 INFO L495 AbstractCegarLoop]: Abstraction has 14156 states and 18301 transitions. [2022-11-03 03:53:02,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:02,971 INFO L276 IsEmpty]: Start isEmpty. Operand 14156 states and 18301 transitions. [2022-11-03 03:53:02,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:53:02,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:02,985 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:02,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:03,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-03 03:53:03,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:03,390 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:03,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:03,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1372805433, now seen corresponding path program 3 times [2022-11-03 03:53:03,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:03,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397791892] [2022-11-03 03:53:03,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:53:03,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:03,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:03,393 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:03,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 03:53:03,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:53:03,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:53:03,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 03:53:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 03:53:08,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 03:53:13,664 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:13,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397791892] [2022-11-03 03:53:13,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397791892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:13,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1231438422] [2022-11-03 03:53:13,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:53:13,664 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:13,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:13,665 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:13,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-03 03:53:14,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:53:14,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:53:14,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 03:53:14,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 03:53:18,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 03:53:22,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1231438422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:22,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141675519] [2022-11-03 03:53:22,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:53:22,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:22,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:22,959 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:22,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-03 03:53:23,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:53:23,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:53:23,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 03:53:23,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 03:53:27,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 03:53:32,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141675519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:32,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:53:32,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 13, 13] total 27 [2022-11-03 03:53:32,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155044172] [2022-11-03 03:53:32,008 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:53:32,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:53:32,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:53:32,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:53:32,011 INFO L87 Difference]: Start difference. First operand 14156 states and 18301 transitions. Second operand has 27 states, 27 states have (on average 18.925925925925927) internal successors, (511), 27 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:32,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:32,627 INFO L93 Difference]: Finished difference Result 24822 states and 32297 transitions. [2022-11-03 03:53:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 03:53:32,628 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 18.925925925925927) internal successors, (511), 27 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:53:32,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:32,725 INFO L225 Difference]: With dead ends: 24822 [2022-11-03 03:53:32,725 INFO L226 Difference]: Without dead ends: 24820 [2022-11-03 03:53:32,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1378 GetRequests, 1344 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-11-03 03:53:32,728 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 350 mSDsluCounter, 4447 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 4730 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 717 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:32,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 4730 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 717 Unchecked, 0.1s Time] [2022-11-03 03:53:32,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24820 states. [2022-11-03 03:53:33,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24820 to 14916. [2022-11-03 03:53:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14916 states, 14915 states have (on average 1.2937981897418707) internal successors, (19297), 14915 states have internal predecessors, (19297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:33,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14916 states to 14916 states and 19297 transitions. [2022-11-03 03:53:33,085 INFO L78 Accepts]: Start accepts. Automaton has 14916 states and 19297 transitions. Word has length 230 [2022-11-03 03:53:33,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:33,085 INFO L495 AbstractCegarLoop]: Abstraction has 14916 states and 19297 transitions. [2022-11-03 03:53:33,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 18.925925925925927) internal successors, (511), 27 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 14916 states and 19297 transitions. [2022-11-03 03:53:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:53:33,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:33,100 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:33,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-11-03 03:53:33,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2022-11-03 03:53:33,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-03 03:53:33,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:33,717 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:33,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:33,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1357286715, now seen corresponding path program 4 times [2022-11-03 03:53:33,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:33,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111090391] [2022-11-03 03:53:33,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:53:33,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:33,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:33,720 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:33,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 03:53:34,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:53:34,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:53:34,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:53:34,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 03:53:34,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 20 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 03:53:35,137 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:35,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111090391] [2022-11-03 03:53:35,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111090391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:35,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [531843094] [2022-11-03 03:53:35,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:53:35,137 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:35,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:35,138 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:35,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2022-11-03 03:53:35,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:53:35,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:53:35,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:53:35,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 46 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 03:53:36,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 46 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 03:53:36,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [531843094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:36,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880714168] [2022-11-03 03:53:36,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:53:36,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:53:36,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:53:36,773 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:53:36,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-11-03 03:53:37,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:53:37,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:53:37,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:53:37,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 5 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-03 03:53:37,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 5 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-03 03:53:37,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880714168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:37,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:53:37,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 7, 7, 7, 7] total 38 [2022-11-03 03:53:37,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322678756] [2022-11-03 03:53:37,846 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:53:37,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:53:37,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:37,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:53:37,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:53:37,847 INFO L87 Difference]: Start difference. First operand 14916 states and 19297 transitions. Second operand has 38 states, 38 states have (on average 14.473684210526315) internal successors, (550), 38 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:58,330 INFO L93 Difference]: Finished difference Result 72613 states and 95092 transitions. [2022-11-03 03:53:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-11-03 03:53:58,331 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 14.473684210526315) internal successors, (550), 38 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:53:58,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:58,382 INFO L225 Difference]: With dead ends: 72613 [2022-11-03 03:53:58,383 INFO L226 Difference]: Without dead ends: 57763 [2022-11-03 03:53:58,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1569 GetRequests, 1336 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19321 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=7341, Invalid=46715, Unknown=0, NotChecked=0, Total=54056 [2022-11-03 03:53:58,404 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 11112 mSDsluCounter, 8664 mSDsCounter, 0 mSdLazyCounter, 2931 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11112 SdHoareTripleChecker+Valid, 9181 SdHoareTripleChecker+Invalid, 3555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 2931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:58,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11112 Valid, 9181 Invalid, 3555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 2931 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 03:53:58,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57763 states. [2022-11-03 03:53:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57763 to 15184. [2022-11-03 03:53:58,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15184 states, 15183 states have (on average 1.2693802278864519) internal successors, (19273), 15183 states have internal predecessors, (19273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15184 states to 15184 states and 19273 transitions. [2022-11-03 03:53:58,948 INFO L78 Accepts]: Start accepts. Automaton has 15184 states and 19273 transitions. Word has length 230 [2022-11-03 03:53:58,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:58,948 INFO L495 AbstractCegarLoop]: Abstraction has 15184 states and 19273 transitions. [2022-11-03 03:53:58,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 14.473684210526315) internal successors, (550), 38 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:58,949 INFO L276 IsEmpty]: Start isEmpty. Operand 15184 states and 19273 transitions. [2022-11-03 03:53:58,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:53:58,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:58,954 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-03 03:53:58,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-11-03 03:53:59,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-03 03:53:59,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Ended with exit code 0 [2022-11-03 03:53:59,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:59,555 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:59,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:59,556 INFO L85 PathProgramCache]: Analyzing trace with hash -261880833, now seen corresponding path program 1 times [2022-11-03 03:53:59,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:59,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708016017] [2022-11-03 03:53:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:59,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:59,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:59,558 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:59,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-03 03:53:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:59,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:53:59,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 30 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 03:54:00,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 30 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 03:54:00,836 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:00,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708016017] [2022-11-03 03:54:00,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708016017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:00,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1948840561] [2022-11-03 03:54:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:00,836 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:00,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:00,838 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:00,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2022-11-03 03:54:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:01,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:54:01,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-03 03:54:01,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:54:01,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1948840561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:01,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:54:01,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 03:54:01,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272650186] [2022-11-03 03:54:01,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:01,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:54:01,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:01,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:54:01,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:54:01,507 INFO L87 Difference]: Start difference. First operand 15184 states and 19273 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:01,843 INFO L93 Difference]: Finished difference Result 43193 states and 55074 transitions. [2022-11-03 03:54:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:54:01,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:54:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:01,869 INFO L225 Difference]: With dead ends: 43193 [2022-11-03 03:54:01,869 INFO L226 Difference]: Without dead ends: 29250 [2022-11-03 03:54:01,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 676 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:54:01,884 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 326 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:01,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 527 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:54:01,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29250 states. [2022-11-03 03:54:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29250 to 15904. [2022-11-03 03:54:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15904 states, 15903 states have (on average 1.265673143432057) internal successors, (20128), 15903 states have internal predecessors, (20128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15904 states to 15904 states and 20128 transitions. [2022-11-03 03:54:02,393 INFO L78 Accepts]: Start accepts. Automaton has 15904 states and 20128 transitions. Word has length 230 [2022-11-03 03:54:02,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:02,393 INFO L495 AbstractCegarLoop]: Abstraction has 15904 states and 20128 transitions. [2022-11-03 03:54:02,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 15904 states and 20128 transitions. [2022-11-03 03:54:02,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:54:02,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:02,398 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-03 03:54:02,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (88)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:02,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-03 03:54:02,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:54:02,799 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:02,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1776164543, now seen corresponding path program 1 times [2022-11-03 03:54:02,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:02,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494204239] [2022-11-03 03:54:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:02,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:02,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:02,803 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:02,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 03:54:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:03,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:54:03,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 30 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 03:54:03,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 30 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 03:54:04,075 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:04,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494204239] [2022-11-03 03:54:04,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494204239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:04,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [80150211] [2022-11-03 03:54:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:04,075 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:04,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:04,076 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:04,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-03 03:54:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:04,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:54:04,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 50 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:54:05,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 177 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:54:05,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [80150211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:05,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219171918] [2022-11-03 03:54:05,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:05,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:05,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:05,934 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:05,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-03 03:54:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:06,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:54:06,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 50 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:54:06,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 177 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 03:54:06,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219171918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:06,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:06,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 12, 12, 12, 12] total 30 [2022-11-03 03:54:06,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795005116] [2022-11-03 03:54:06,783 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:06,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 03:54:06,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:06,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 03:54:06,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:54:06,784 INFO L87 Difference]: Start difference. First operand 15904 states and 20128 transitions. Second operand has 30 states, 30 states have (on average 15.066666666666666) internal successors, (452), 30 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:14,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:14,367 INFO L93 Difference]: Finished difference Result 234232 states and 295660 transitions. [2022-11-03 03:54:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-03 03:54:14,368 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 15.066666666666666) internal successors, (452), 30 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:54:14,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:14,558 INFO L225 Difference]: With dead ends: 234232 [2022-11-03 03:54:14,558 INFO L226 Difference]: Without dead ends: 218394 [2022-11-03 03:54:14,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1456 GetRequests, 1346 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3703 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2428, Invalid=10004, Unknown=0, NotChecked=0, Total=12432 [2022-11-03 03:54:14,590 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 7158 mSDsluCounter, 3393 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7158 SdHoareTripleChecker+Valid, 3530 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:14,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7158 Valid, 3530 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 03:54:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218394 states. [2022-11-03 03:54:16,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218394 to 64994. [2022-11-03 03:54:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64994 states, 64993 states have (on average 1.2463034480636377) internal successors, (81001), 64993 states have internal predecessors, (81001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64994 states to 64994 states and 81001 transitions. [2022-11-03 03:54:16,837 INFO L78 Accepts]: Start accepts. Automaton has 64994 states and 81001 transitions. Word has length 230 [2022-11-03 03:54:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:16,838 INFO L495 AbstractCegarLoop]: Abstraction has 64994 states and 81001 transitions. [2022-11-03 03:54:16,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 15.066666666666666) internal successors, (452), 30 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:16,838 INFO L276 IsEmpty]: Start isEmpty. Operand 64994 states and 81001 transitions. [2022-11-03 03:54:16,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:54:16,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:16,861 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:54:16,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:17,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:17,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:17,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:17,462 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:17,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:17,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1260251901, now seen corresponding path program 1 times [2022-11-03 03:54:17,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:17,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519323488] [2022-11-03 03:54:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:17,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:17,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:17,465 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:17,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 03:54:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:17,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:54:17,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 58 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 03:54:18,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 195 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 03:54:18,704 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:18,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519323488] [2022-11-03 03:54:18,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519323488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:18,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1988012869] [2022-11-03 03:54:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:18,704 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:18,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:18,706 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:18,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-03 03:54:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:19,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:54:19,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 58 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 03:54:19,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 195 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 03:54:20,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1988012869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:20,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153779701] [2022-11-03 03:54:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:20,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:20,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:20,174 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:20,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-03 03:54:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:20,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:54:20,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 64 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:54:21,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 64 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:54:21,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153779701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:21,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:21,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 22 [2022-11-03 03:54:21,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767361185] [2022-11-03 03:54:21,899 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:21,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 03:54:21,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:21,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 03:54:21,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:54:21,901 INFO L87 Difference]: Start difference. First operand 64994 states and 81001 transitions. Second operand has 22 states, 22 states have (on average 24.5) internal successors, (539), 22 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:26,840 INFO L93 Difference]: Finished difference Result 280244 states and 352073 transitions. [2022-11-03 03:54:26,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 03:54:26,841 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 24.5) internal successors, (539), 22 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:54:26,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:27,066 INFO L225 Difference]: With dead ends: 280244 [2022-11-03 03:54:27,066 INFO L226 Difference]: Without dead ends: 215354 [2022-11-03 03:54:27,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1409 GetRequests, 1354 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=733, Invalid=2459, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 03:54:27,128 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 5362 mSDsluCounter, 2119 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5362 SdHoareTripleChecker+Valid, 2264 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:27,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5362 Valid, 2264 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 03:54:27,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215354 states. [2022-11-03 03:54:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215354 to 94946. [2022-11-03 03:54:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94946 states, 94945 states have (on average 1.24672178629733) internal successors, (118370), 94945 states have internal predecessors, (118370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94946 states to 94946 states and 118370 transitions. [2022-11-03 03:54:30,307 INFO L78 Accepts]: Start accepts. Automaton has 94946 states and 118370 transitions. Word has length 230 [2022-11-03 03:54:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:30,307 INFO L495 AbstractCegarLoop]: Abstraction has 94946 states and 118370 transitions. [2022-11-03 03:54:30,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 24.5) internal successors, (539), 22 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:30,308 INFO L276 IsEmpty]: Start isEmpty. Operand 94946 states and 118370 transitions. [2022-11-03 03:54:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 03:54:30,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:30,326 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:54:30,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:30,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:30,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2022-11-03 03:54:30,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:30,928 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:30,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:30,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1223422077, now seen corresponding path program 1 times [2022-11-03 03:54:30,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:30,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181851674] [2022-11-03 03:54:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:30,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:30,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:30,931 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:30,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-03 03:54:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:31,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:54:31,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 154 proven. 60 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:54:31,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 195 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:54:32,246 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:32,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181851674] [2022-11-03 03:54:32,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181851674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:32,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1828031625] [2022-11-03 03:54:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:32,246 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:32,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:32,248 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:32,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2022-11-03 03:54:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:32,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:54:32,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-03 03:54:32,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:54:32,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1828031625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:32,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:54:32,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 12 [2022-11-03 03:54:32,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746863907] [2022-11-03 03:54:32,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:32,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:54:32,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:32,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:54:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:54:32,874 INFO L87 Difference]: Start difference. First operand 94946 states and 118370 transitions. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:33,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:33,871 INFO L93 Difference]: Finished difference Result 137966 states and 172798 transitions. [2022-11-03 03:54:33,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:54:33,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-11-03 03:54:33,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:33,905 INFO L225 Difference]: With dead ends: 137966 [2022-11-03 03:54:33,905 INFO L226 Difference]: Without dead ends: 46776 [2022-11-03 03:54:33,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:54:33,923 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 260 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:33,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 598 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:54:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46776 states. [2022-11-03 03:54:34,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46776 to 24646. [2022-11-03 03:54:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24646 states, 24645 states have (on average 1.2514911746804627) internal successors, (30843), 24645 states have internal predecessors, (30843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:34,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24646 states to 24646 states and 30843 transitions. [2022-11-03 03:54:34,803 INFO L78 Accepts]: Start accepts. Automaton has 24646 states and 30843 transitions. Word has length 230 [2022-11-03 03:54:34,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:34,803 INFO L495 AbstractCegarLoop]: Abstraction has 24646 states and 30843 transitions. [2022-11-03 03:54:34,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:34,804 INFO L276 IsEmpty]: Start isEmpty. Operand 24646 states and 30843 transitions. [2022-11-03 03:54:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-11-03 03:54:34,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:34,818 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:34,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (96)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:35,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:35,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:54:35,223 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:35,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2088308649, now seen corresponding path program 1 times [2022-11-03 03:54:35,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:35,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615950161] [2022-11-03 03:54:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:35,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:35,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:35,227 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:35,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-03 03:54:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:36,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 2010 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:54:36,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 421 proven. 14 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-11-03 03:54:36,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 421 proven. 14 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-11-03 03:54:37,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:37,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615950161] [2022-11-03 03:54:37,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615950161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:37,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [749713136] [2022-11-03 03:54:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:37,115 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:37,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:37,116 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:37,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-11-03 03:54:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:38,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 2010 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:54:38,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 427 proven. 16 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2022-11-03 03:54:39,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 427 proven. 16 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2022-11-03 03:54:39,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [749713136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:39,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826657059] [2022-11-03 03:54:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:39,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:39,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:39,651 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:39,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-03 03:54:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:40,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 2010 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:54:40,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 427 proven. 16 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2022-11-03 03:54:40,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 427 proven. 16 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2022-11-03 03:54:41,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826657059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:41,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:41,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12, 12, 13, 12] total 40 [2022-11-03 03:54:41,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240252440] [2022-11-03 03:54:41,046 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:41,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:54:41,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:41,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:54:41,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:54:41,047 INFO L87 Difference]: Start difference. First operand 24646 states and 30843 transitions. Second operand has 40 states, 40 states have (on average 9.5) internal successors, (380), 40 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:44,956 INFO L93 Difference]: Finished difference Result 67694 states and 84653 transitions. [2022-11-03 03:54:44,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 03:54:44,956 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 9.5) internal successors, (380), 40 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 455 [2022-11-03 03:54:44,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:44,987 INFO L225 Difference]: With dead ends: 67694 [2022-11-03 03:54:44,987 INFO L226 Difference]: Without dead ends: 43112 [2022-11-03 03:54:45,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2759 GetRequests, 2686 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1062, Invalid=4488, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 03:54:45,007 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 3461 mSDsluCounter, 5734 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 5940 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:45,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 5940 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 03:54:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43112 states. [2022-11-03 03:54:45,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43112 to 20488. [2022-11-03 03:54:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20488 states, 20487 states have (on average 1.2477180651144628) internal successors, (25562), 20487 states have internal predecessors, (25562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20488 states to 20488 states and 25562 transitions. [2022-11-03 03:54:45,639 INFO L78 Accepts]: Start accepts. Automaton has 20488 states and 25562 transitions. Word has length 455 [2022-11-03 03:54:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:45,639 INFO L495 AbstractCegarLoop]: Abstraction has 20488 states and 25562 transitions. [2022-11-03 03:54:45,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 9.5) internal successors, (380), 40 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 20488 states and 25562 transitions. [2022-11-03 03:54:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2022-11-03 03:54:45,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:45,652 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:45,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-11-03 03:54:45,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:46,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (98)] Ended with exit code 0 [2022-11-03 03:54:46,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:46,259 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:46,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1001676137, now seen corresponding path program 2 times [2022-11-03 03:54:46,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:46,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197594288] [2022-11-03 03:54:46,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:54:46,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:46,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:46,265 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:46,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 03:54:47,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:54:47,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:47,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 2650 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:54:47,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 936 proven. 86 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2022-11-03 03:54:47,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 936 proven. 86 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2022-11-03 03:54:48,183 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:48,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197594288] [2022-11-03 03:54:48,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197594288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:48,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1183561746] [2022-11-03 03:54:48,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:54:48,184 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:48,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:48,187 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:48,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-03 03:54:50,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:54:50,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:50,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 2650 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:54:50,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 936 proven. 86 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2022-11-03 03:54:50,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 936 proven. 86 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2022-11-03 03:54:51,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1183561746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:51,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032648207] [2022-11-03 03:54:51,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:54:51,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:51,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:51,126 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:51,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-03 03:54:51,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:54:51,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:51,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 2650 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:54:51,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 936 proven. 86 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2022-11-03 03:54:52,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 936 proven. 86 refuted. 0 times theorem prover too weak. 1094 trivial. 0 not checked. [2022-11-03 03:54:52,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032648207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:52,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:52,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 03:54:52,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345583560] [2022-11-03 03:54:52,858 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:52,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:54:52,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:52,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:54:52,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:54:52,862 INFO L87 Difference]: Start difference. First operand 20488 states and 25562 transitions. Second operand has 11 states, 11 states have (on average 30.181818181818183) internal successors, (332), 11 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:53,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:53,800 INFO L93 Difference]: Finished difference Result 80478 states and 100384 transitions. [2022-11-03 03:54:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:54:53,801 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 30.181818181818183) internal successors, (332), 11 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 605 [2022-11-03 03:54:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:53,846 INFO L225 Difference]: With dead ends: 80478 [2022-11-03 03:54:53,846 INFO L226 Difference]: Without dead ends: 60054 [2022-11-03 03:54:53,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3632 GetRequests, 3615 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:54:53,860 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 1044 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1044 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:53,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1044 Valid, 811 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:54:53,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60054 states. [2022-11-03 03:54:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60054 to 40910. [2022-11-03 03:54:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40910 states, 40909 states have (on average 1.2436383191962648) internal successors, (50876), 40909 states have internal predecessors, (50876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40910 states to 40910 states and 50876 transitions. [2022-11-03 03:54:54,892 INFO L78 Accepts]: Start accepts. Automaton has 40910 states and 50876 transitions. Word has length 605 [2022-11-03 03:54:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:54,892 INFO L495 AbstractCegarLoop]: Abstraction has 40910 states and 50876 transitions. [2022-11-03 03:54:54,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.181818181818183) internal successors, (332), 11 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:54,893 INFO L276 IsEmpty]: Start isEmpty. Operand 40910 states and 50876 transitions. [2022-11-03 03:54:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2022-11-03 03:54:54,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:54,911 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:54,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:55,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-11-03 03:54:55,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:55,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:54:55,526 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:55,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:55,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1226200797, now seen corresponding path program 3 times [2022-11-03 03:54:55,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:55,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609062744] [2022-11-03 03:54:55,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:54:55,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:55,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:55,530 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:55,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-03 03:54:56,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:54:56,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:54:56,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 03:54:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 520 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2022-11-03 03:55:10,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 520 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2022-11-03 03:55:23,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:55:23,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609062744] [2022-11-03 03:55:23,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609062744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:23,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [510735298] [2022-11-03 03:55:23,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:55:23,867 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:55:23,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:55:23,871 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:55:23,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (104)] Waiting until timeout for monitored process [2022-11-03 03:55:24,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:55:24,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:55:24,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 03:55:24,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 520 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2022-11-03 03:55:40,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:55:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 520 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2022-11-03 03:55:52,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [510735298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:55:52,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17809251] [2022-11-03 03:55:52,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:55:52,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:55:52,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:55:52,768 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:55:52,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-11-03 03:55:53,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:55:53,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:55:53,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 03:55:53,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 520 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2022-11-03 03:56:07,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 520 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2022-11-03 03:56:20,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17809251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:20,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:20,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 13, 13] total 27 [2022-11-03 03:56:20,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728917828] [2022-11-03 03:56:20,294 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:20,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:56:20,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:20,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:56:20,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:56:20,296 INFO L87 Difference]: Start difference. First operand 40910 states and 50876 transitions. Second operand has 27 states, 27 states have (on average 19.666666666666668) internal successors, (531), 27 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:21,591 INFO L93 Difference]: Finished difference Result 65832 states and 82469 transitions. [2022-11-03 03:56:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 03:56:21,592 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 19.666666666666668) internal successors, (531), 27 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 605 [2022-11-03 03:56:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:21,649 INFO L225 Difference]: With dead ends: 65832 [2022-11-03 03:56:21,649 INFO L226 Difference]: Without dead ends: 65830 [2022-11-03 03:56:21,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3628 GetRequests, 3592 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-11-03 03:56:21,663 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 453 mSDsluCounter, 3640 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 3915 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:21,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 3915 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 447 Unchecked, 0.1s Time] [2022-11-03 03:56:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65830 states. [2022-11-03 03:56:22,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65830 to 41854. [2022-11-03 03:56:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41854 states, 41853 states have (on average 1.2439251666547202) internal successors, (52062), 41853 states have internal predecessors, (52062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:22,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41854 states to 41854 states and 52062 transitions. [2022-11-03 03:56:22,981 INFO L78 Accepts]: Start accepts. Automaton has 41854 states and 52062 transitions. Word has length 605 [2022-11-03 03:56:22,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:22,982 INFO L495 AbstractCegarLoop]: Abstraction has 41854 states and 52062 transitions. [2022-11-03 03:56:22,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 19.666666666666668) internal successors, (531), 27 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:22,982 INFO L276 IsEmpty]: Start isEmpty. Operand 41854 states and 52062 transitions. [2022-11-03 03:56:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2022-11-03 03:56:23,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:23,002 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:23,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:23,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (104)] Ended with exit code 0 [2022-11-03 03:56:23,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:23,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:23,619 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:23,620 INFO L85 PathProgramCache]: Analyzing trace with hash -524600923, now seen corresponding path program 1 times [2022-11-03 03:56:23,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:23,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544579486] [2022-11-03 03:56:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:23,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:23,623 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:23,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-03 03:56:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:24,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 2650 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:56:24,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 942 proven. 55 refuted. 0 times theorem prover too weak. 1119 trivial. 0 not checked. [2022-11-03 03:56:25,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 994 proven. 3 refuted. 0 times theorem prover too weak. 1119 trivial. 0 not checked. [2022-11-03 03:56:25,571 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:25,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544579486] [2022-11-03 03:56:25,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544579486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:25,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [957052106] [2022-11-03 03:56:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:25,572 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:25,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:25,574 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:25,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (107)] Waiting until timeout for monitored process [2022-11-03 03:56:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:26,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 2650 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:56:26,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1108 proven. 0 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2022-11-03 03:56:27,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:27,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [957052106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:27,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:56:27,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 10] total 18 [2022-11-03 03:56:27,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842301970] [2022-11-03 03:56:27,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:27,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:27,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:27,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:27,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:56:27,025 INFO L87 Difference]: Start difference. First operand 41854 states and 52062 transitions. Second operand has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:28,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:28,192 INFO L93 Difference]: Finished difference Result 103696 states and 128748 transitions. [2022-11-03 03:56:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:56:28,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 605 [2022-11-03 03:56:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:28,238 INFO L225 Difference]: With dead ends: 103696 [2022-11-03 03:56:28,238 INFO L226 Difference]: Without dead ends: 62258 [2022-11-03 03:56:28,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1818 GetRequests, 1798 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:56:28,260 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 426 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:28,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 505 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62258 states. [2022-11-03 03:56:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62258 to 41792. [2022-11-03 03:56:29,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41792 states, 41791 states have (on average 1.236582039195042) internal successors, (51678), 41791 states have internal predecessors, (51678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41792 states to 41792 states and 51678 transitions. [2022-11-03 03:56:29,469 INFO L78 Accepts]: Start accepts. Automaton has 41792 states and 51678 transitions. Word has length 605 [2022-11-03 03:56:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:29,469 INFO L495 AbstractCegarLoop]: Abstraction has 41792 states and 51678 transitions. [2022-11-03 03:56:29,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 41792 states and 51678 transitions. [2022-11-03 03:56:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2022-11-03 03:56:29,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:29,483 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:29,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-11-03 03:56:29,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (107)] Ended with exit code 0 [2022-11-03 03:56:29,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:29,884 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:29,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:29,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2022992929, now seen corresponding path program 2 times [2022-11-03 03:56:29,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:29,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720237822] [2022-11-03 03:56:29,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:56:29,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:29,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:29,888 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:29,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-03 03:56:30,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:56:30,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:56:30,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 2650 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:56:30,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 942 proven. 55 refuted. 0 times theorem prover too weak. 1119 trivial. 0 not checked. [2022-11-03 03:56:31,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 994 proven. 3 refuted. 0 times theorem prover too weak. 1119 trivial. 0 not checked. [2022-11-03 03:56:32,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:32,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720237822] [2022-11-03 03:56:32,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720237822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:32,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1359723013] [2022-11-03 03:56:32,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:56:32,035 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:32,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:32,036 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:32,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (109)] Waiting until timeout for monitored process [2022-11-03 03:56:33,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:56:33,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:56:34,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 2650 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:56:34,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 942 proven. 55 refuted. 0 times theorem prover too weak. 1119 trivial. 0 not checked. [2022-11-03 03:56:34,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 994 proven. 3 refuted. 0 times theorem prover too weak. 1119 trivial. 0 not checked. [2022-11-03 03:56:34,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1359723013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:34,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536452913] [2022-11-03 03:56:34,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:56:34,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:34,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:34,995 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:34,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-11-03 03:56:35,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:56:35,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:56:35,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 2650 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:56:35,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 976 proven. 54 refuted. 0 times theorem prover too weak. 1086 trivial. 0 not checked. [2022-11-03 03:56:36,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1029 proven. 1 refuted. 0 times theorem prover too weak. 1086 trivial. 0 not checked. [2022-11-03 03:56:36,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536452913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:36,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:36,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 9] total 18 [2022-11-03 03:56:36,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66528833] [2022-11-03 03:56:36,539 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:36,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 03:56:36,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:36,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 03:56:36,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:56:36,541 INFO L87 Difference]: Start difference. First operand 41792 states and 51678 transitions. Second operand has 18 states, 18 states have (on average 25.72222222222222) internal successors, (463), 18 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:36,927 INFO L93 Difference]: Finished difference Result 42208 states and 52136 transitions. [2022-11-03 03:56:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:56:36,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 25.72222222222222) internal successors, (463), 18 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 605 [2022-11-03 03:56:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:36,928 INFO L225 Difference]: With dead ends: 42208 [2022-11-03 03:56:36,928 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 03:56:36,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3632 GetRequests, 3609 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:56:36,940 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 705 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:36,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 350 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:36,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 03:56:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 03:56:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 03:56:36,941 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 605 [2022-11-03 03:56:36,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:36,941 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 03:56:36,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.72222222222222) internal successors, (463), 18 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:36,942 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 03:56:36,942 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 03:56:36,945 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:56:36,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (109)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:37,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:37,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-11-03 03:56:37,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:37,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-03 03:56:49,729 WARN L234 SmtUtils]: Spent 12.17s on a formula simplification that was a NOOP. DAG size: 283 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 03:56:52,633 INFO L899 garLoopResultBuilder]: For program point L300(line 300) no Hoare annotation was computed. [2022-11-03 03:56:52,634 INFO L899 garLoopResultBuilder]: For program point L267(line 267) no Hoare annotation was computed. [2022-11-03 03:56:52,634 INFO L899 garLoopResultBuilder]: For program point L300-2(line 300) no Hoare annotation was computed. [2022-11-03 03:56:52,634 INFO L899 garLoopResultBuilder]: For program point L267-2(line 267) no Hoare annotation was computed. [2022-11-03 03:56:52,634 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-03 03:56:52,634 INFO L899 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2022-11-03 03:56:52,634 INFO L899 garLoopResultBuilder]: For program point L20-1(line 20) no Hoare annotation was computed. [2022-11-03 03:56:52,634 INFO L899 garLoopResultBuilder]: For program point L20-3(line 20) no Hoare annotation was computed. [2022-11-03 03:56:52,634 INFO L899 garLoopResultBuilder]: For program point L186(line 186) no Hoare annotation was computed. [2022-11-03 03:56:52,634 INFO L899 garLoopResultBuilder]: For program point L186-2(line 186) no Hoare annotation was computed. [2022-11-03 03:56:52,635 INFO L899 garLoopResultBuilder]: For program point L368(line 368) no Hoare annotation was computed. [2022-11-03 03:56:52,635 INFO L899 garLoopResultBuilder]: For program point L368-2(line 368) no Hoare annotation was computed. [2022-11-03 03:56:52,635 INFO L895 garLoopResultBuilder]: At program point L385(lines 22 386) the Hoare annotation is: false [2022-11-03 03:56:52,635 INFO L899 garLoopResultBuilder]: For program point L352(line 352) no Hoare annotation was computed. [2022-11-03 03:56:52,635 INFO L899 garLoopResultBuilder]: For program point L352-2(line 352) no Hoare annotation was computed. [2022-11-03 03:56:52,636 INFO L899 garLoopResultBuilder]: For program point L204(line 204) no Hoare annotation was computed. [2022-11-03 03:56:52,636 INFO L899 garLoopResultBuilder]: For program point L204-2(line 204) no Hoare annotation was computed. [2022-11-03 03:56:52,636 INFO L899 garLoopResultBuilder]: For program point L320(line 320) no Hoare annotation was computed. [2022-11-03 03:56:52,636 INFO L899 garLoopResultBuilder]: For program point L287(line 287) no Hoare annotation was computed. [2022-11-03 03:56:52,636 INFO L899 garLoopResultBuilder]: For program point L320-2(line 320) no Hoare annotation was computed. [2022-11-03 03:56:52,636 INFO L899 garLoopResultBuilder]: For program point L221(line 221) no Hoare annotation was computed. [2022-11-03 03:56:52,637 INFO L899 garLoopResultBuilder]: For program point L287-2(line 287) no Hoare annotation was computed. [2022-11-03 03:56:52,637 INFO L899 garLoopResultBuilder]: For program point L221-2(line 221) no Hoare annotation was computed. [2022-11-03 03:56:52,637 INFO L899 garLoopResultBuilder]: For program point L304(line 304) no Hoare annotation was computed. [2022-11-03 03:56:52,637 INFO L899 garLoopResultBuilder]: For program point L271(line 271) no Hoare annotation was computed. [2022-11-03 03:56:52,637 INFO L899 garLoopResultBuilder]: For program point L238(line 238) no Hoare annotation was computed. [2022-11-03 03:56:52,637 INFO L899 garLoopResultBuilder]: For program point L304-2(line 304) no Hoare annotation was computed. [2022-11-03 03:56:52,638 INFO L899 garLoopResultBuilder]: For program point L271-2(line 271) no Hoare annotation was computed. [2022-11-03 03:56:52,638 INFO L899 garLoopResultBuilder]: For program point L238-2(line 238) no Hoare annotation was computed. [2022-11-03 03:56:52,638 INFO L899 garLoopResultBuilder]: For program point L255(line 255) no Hoare annotation was computed. [2022-11-03 03:56:52,638 INFO L899 garLoopResultBuilder]: For program point L255-2(line 255) no Hoare annotation was computed. [2022-11-03 03:56:52,638 INFO L899 garLoopResultBuilder]: For program point L338(line 338) no Hoare annotation was computed. [2022-11-03 03:56:52,638 INFO L899 garLoopResultBuilder]: For program point L338-2(line 338) no Hoare annotation was computed. [2022-11-03 03:56:52,638 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-03 03:56:52,638 INFO L899 garLoopResultBuilder]: For program point L190(line 190) no Hoare annotation was computed. [2022-11-03 03:56:52,638 INFO L899 garLoopResultBuilder]: For program point L190-2(line 190) no Hoare annotation was computed. [2022-11-03 03:56:52,639 INFO L899 garLoopResultBuilder]: For program point L356(line 356) no Hoare annotation was computed. [2022-11-03 03:56:52,639 INFO L899 garLoopResultBuilder]: For program point L356-2(line 356) no Hoare annotation was computed. [2022-11-03 03:56:52,639 INFO L899 garLoopResultBuilder]: For program point L208(line 208) no Hoare annotation was computed. [2022-11-03 03:56:52,639 INFO L899 garLoopResultBuilder]: For program point L208-2(line 208) no Hoare annotation was computed. [2022-11-03 03:56:52,639 INFO L899 garLoopResultBuilder]: For program point L324(line 324) no Hoare annotation was computed. [2022-11-03 03:56:52,639 INFO L899 garLoopResultBuilder]: For program point L324-2(line 324) no Hoare annotation was computed. [2022-11-03 03:56:52,639 INFO L899 garLoopResultBuilder]: For program point L225(line 225) no Hoare annotation was computed. [2022-11-03 03:56:52,639 INFO L899 garLoopResultBuilder]: For program point L225-2(line 225) no Hoare annotation was computed. [2022-11-03 03:56:52,639 INFO L899 garLoopResultBuilder]: For program point L308(line 308) no Hoare annotation was computed. [2022-11-03 03:56:52,640 INFO L899 garLoopResultBuilder]: For program point L275(line 275) no Hoare annotation was computed. [2022-11-03 03:56:52,640 INFO L899 garLoopResultBuilder]: For program point L242(line 242) no Hoare annotation was computed. [2022-11-03 03:56:52,640 INFO L899 garLoopResultBuilder]: For program point L308-2(line 308) no Hoare annotation was computed. [2022-11-03 03:56:52,640 INFO L899 garLoopResultBuilder]: For program point L275-2(line 275) no Hoare annotation was computed. [2022-11-03 03:56:52,640 INFO L899 garLoopResultBuilder]: For program point L242-2(line 242) no Hoare annotation was computed. [2022-11-03 03:56:52,641 INFO L899 garLoopResultBuilder]: For program point L259(line 259) no Hoare annotation was computed. [2022-11-03 03:56:52,641 INFO L899 garLoopResultBuilder]: For program point L259-2(line 259) no Hoare annotation was computed. [2022-11-03 03:56:52,641 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-03 03:56:52,641 INFO L899 garLoopResultBuilder]: For program point L293(line 293) no Hoare annotation was computed. [2022-11-03 03:56:52,641 INFO L899 garLoopResultBuilder]: For program point L293-2(line 293) no Hoare annotation was computed. [2022-11-03 03:56:52,642 INFO L899 garLoopResultBuilder]: For program point L360(line 360) no Hoare annotation was computed. [2022-11-03 03:56:52,642 INFO L899 garLoopResultBuilder]: For program point L360-2(line 360) no Hoare annotation was computed. [2022-11-03 03:56:52,642 INFO L899 garLoopResultBuilder]: For program point L195(line 195) no Hoare annotation was computed. [2022-11-03 03:56:52,642 INFO L899 garLoopResultBuilder]: For program point L195-2(line 195) no Hoare annotation was computed. [2022-11-03 03:56:52,642 INFO L899 garLoopResultBuilder]: For program point L212(line 212) no Hoare annotation was computed. [2022-11-03 03:56:52,642 INFO L899 garLoopResultBuilder]: For program point L212-2(line 212) no Hoare annotation was computed. [2022-11-03 03:56:52,643 INFO L899 garLoopResultBuilder]: For program point L328(line 328) no Hoare annotation was computed. [2022-11-03 03:56:52,643 INFO L899 garLoopResultBuilder]: For program point L328-2(line 328) no Hoare annotation was computed. [2022-11-03 03:56:52,643 INFO L899 garLoopResultBuilder]: For program point L229(line 229) no Hoare annotation was computed. [2022-11-03 03:56:52,643 INFO L899 garLoopResultBuilder]: For program point L229-2(line 229) no Hoare annotation was computed. [2022-11-03 03:56:52,643 INFO L899 garLoopResultBuilder]: For program point L246(line 246) no Hoare annotation was computed. [2022-11-03 03:56:52,643 INFO L899 garLoopResultBuilder]: For program point L246-2(line 246) no Hoare annotation was computed. [2022-11-03 03:56:52,644 INFO L899 garLoopResultBuilder]: For program point L263(line 263) no Hoare annotation was computed. [2022-11-03 03:56:52,644 INFO L899 garLoopResultBuilder]: For program point L263-2(line 263) no Hoare annotation was computed. [2022-11-03 03:56:52,644 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-03 03:56:52,644 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2022-11-03 03:56:52,644 INFO L899 garLoopResultBuilder]: For program point L281(line 281) no Hoare annotation was computed. [2022-11-03 03:56:52,645 INFO L899 garLoopResultBuilder]: For program point L281-2(line 281) no Hoare annotation was computed. [2022-11-03 03:56:52,645 INFO L899 garLoopResultBuilder]: For program point L182(line 182) no Hoare annotation was computed. [2022-11-03 03:56:52,645 INFO L899 garLoopResultBuilder]: For program point L182-2(line 182) no Hoare annotation was computed. [2022-11-03 03:56:52,646 INFO L895 garLoopResultBuilder]: At program point L116-2(lines 116 384) the Hoare annotation is: (let ((.cse76 ((_ extract 7 0) ((_ zero_extend 24) |ULTIMATE.start_main_~var_23~0#1|)))) (let ((.cse75 ((_ extract 7 0) ((_ zero_extend 24) .cse76)))) (let ((.cse74 ((_ extract 7 0) (bvand (_ bv1 32) ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) .cse75))))))) (let ((.cse0 (= |ULTIMATE.start_main_~var_145_arg_0~0#1| (_ bv0 8))) (.cse2 (= (_ bv0 8) |ULTIMATE.start_main_~var_96_arg_0~0#1|)) (.cse3 (= |ULTIMATE.start_main_~next_91_arg_1~0#1| .cse74)) (.cse4 (= |ULTIMATE.start_main_~var_110_arg_0~0#1| (_ bv0 8))) (.cse5 (= .cse76 |ULTIMATE.start_main_~var_89_arg_1~0#1|)) (.cse6 (= (_ bv1 8) |ULTIMATE.start_main_~var_95_arg_0~0#1|)) (.cse8 (= |ULTIMATE.start_main_~next_118_arg_1~0#1| (_ bv0 8))) (.cse9 (= |ULTIMATE.start_main_~var_80_arg_0~0#1| |ULTIMATE.start_main_~var_79~0#1|)) (.cse10 (= |ULTIMATE.start_main_~var_117_arg_2~0#1| (_ bv0 8))) (.cse11 (= |ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32))) (.cse12 (= (_ bv1 8) |ULTIMATE.start_main_~var_113_arg_2~0#1|)) (.cse13 (= (_ bv0 8) |ULTIMATE.start_main_~var_115_arg_0~0#1|)) (.cse15 (= .cse75 |ULTIMATE.start_main_~var_96_arg_2~0#1|)) (.cse16 (= .cse74 |ULTIMATE.start_main_~state_41~0#1|)) (.cse17 (= |ULTIMATE.start_main_~var_113_arg_0~0#1| (_ bv0 8))) (.cse18 (= |ULTIMATE.start_main_~var_119~0#1| (_ bv0 8))) (.cse19 (= |ULTIMATE.start_main_~next_133_arg_1~0#1| (_ bv0 8))) (.cse20 (= (_ bv0 8) |ULTIMATE.start_main_~next_135_arg_1~0#1|)) (.cse21 (= (_ bv1 8) |ULTIMATE.start_main_~var_121_arg_1~0#1|)) (.cse24 (= |ULTIMATE.start_main_~var_93_arg_2~0#1| |ULTIMATE.start_main_~var_23~0#1|)) (.cse25 (= |ULTIMATE.start_main_~var_146_arg_2~0#1| (_ bv0 8))) (.cse26 (= (_ bv1 8) |ULTIMATE.start_main_~var_94~0#1|)) (.cse27 (= |ULTIMATE.start_main_~var_119_arg_2~0#1| (_ bv0 8))) (.cse28 (not (= |ULTIMATE.start_main_~var_89_arg_0~0#1| (_ bv0 8)))) (.cse29 (= |ULTIMATE.start_main_~var_134_arg_2~0#1| (_ bv0 8))) (.cse31 (= |ULTIMATE.start_main_~var_143_arg_0~0#1| (_ bv0 8))) (.cse32 (= |ULTIMATE.start_main_~var_117_arg_1~0#1| (_ bv0 8))) (.cse33 (= |ULTIMATE.start_main_~next_116_arg_1~0#1| (_ bv0 8))) (.cse35 (= |ULTIMATE.start_main_~var_142_arg_0~0#1| (_ bv0 8))) (.cse36 (= |ULTIMATE.start_main_~var_80_arg_0~0#1| (_ bv0 8))) (.cse38 (= (_ bv1 8) |ULTIMATE.start_main_~var_87_arg_1~0#1|)) (.cse40 (= |ULTIMATE.start_main_~var_90_arg_0~0#1| (_ bv0 8))) (.cse41 (= |ULTIMATE.start_main_~var_119_arg_0~0#1| (_ bv0 8))) (.cse44 (= |ULTIMATE.start_main_~var_99_arg_0~0#1| (_ bv0 8))) (.cse45 (= |ULTIMATE.start_main_~var_93_arg_0~0#1| (_ bv0 8))) (.cse46 (= |ULTIMATE.start_main_~var_141_arg_0~0#1| (_ bv0 8))) (.cse47 (= |ULTIMATE.start_main_~next_97_arg_1~0#1| .cse74)) (.cse48 (= |ULTIMATE.start_main_~var_87_arg_2~0#1| |ULTIMATE.start_main_~var_23~0#1|)) (.cse49 (= (_ bv0 16) |ULTIMATE.start_main_~var_82_arg_2~0#1|)) (.cse50 (= |ULTIMATE.start_main_~var_109_arg_0~0#1| (_ bv0 8))) (.cse51 (= |ULTIMATE.start_main_~var_108_arg_0~0#1| (_ bv0 8))) (.cse52 (= |ULTIMATE.start_main_~var_132_arg_0~0#1| (_ bv0 8))) (.cse53 (= (_ bv0 16) |ULTIMATE.start_main_~next_83_arg_1~0#1|)) (.cse54 (= |ULTIMATE.start_main_~var_131_arg_0~0#1| (_ bv0 8))) (.cse55 (= |ULTIMATE.start_main_~var_95_arg_1~0#1| .cse76)) (.cse57 (= |ULTIMATE.start_main_~var_146_arg_0~0#1| (_ bv0 8))) (.cse58 (= (_ bv0 8) |ULTIMATE.start_main_~var_115_arg_2~0#1|)) (.cse60 (= .cse75 |ULTIMATE.start_main_~var_90_arg_2~0#1|)) (.cse62 (= |ULTIMATE.start_main_~var_87_arg_0~0#1| (_ bv0 8))) (.cse63 (= |ULTIMATE.start_main_~var_121_arg_0~0#1| (_ bv0 8))) (.cse66 (= |ULTIMATE.start_main_~var_81_arg_0~0#1| (_ bv0 8))) (.cse67 (= |ULTIMATE.start_main_~var_84_arg_1~0#1| (_ bv0 8))) (.cse68 (= |ULTIMATE.start_main_~var_111_arg_0~0#1| (_ bv0 8))) (.cse69 (= |ULTIMATE.start_main_~var_132_arg_2~0#1| (_ bv0 8))) (.cse71 (= |ULTIMATE.start_main_~var_82_arg_0~0#1| (_ bv0 8))) (.cse72 (= (_ bv1 8) |ULTIMATE.start_main_~next_114_arg_1~0#1|)) (.cse73 (= |ULTIMATE.start_main_~var_102_arg_0~0#1| (_ bv0 8))) (.cse1 (= (_ bv1 8) |ULTIMATE.start_main_~mask_SORT_1~0#1|)) (.cse7 (= (_ bv104 32) |ULTIMATE.start_main_~var_78~0#1|)) (.cse14 (= (_ bv1023 16) |ULTIMATE.start_main_~mask_SORT_7~0#1|)) (.cse22 (= .cse74 |ULTIMATE.start_main_~state_26~0#1|)) (.cse23 (= (_ bv0 8) |ULTIMATE.start_main_~state_64~0#1|)) (.cse30 (= (_ bv3 8) |ULTIMATE.start_main_~mask_SORT_11~0#1|)) (.cse34 (= (_ bv0 8) |ULTIMATE.start_main_~state_24~0#1|)) (.cse37 (= (_ bv0 16) |ULTIMATE.start_main_~state_9~0#1|)) (.cse39 (= |ULTIMATE.start_main_~var_74~0#1| (_ bv1 32))) (.cse42 (= (_ bv0 8) |ULTIMATE.start_main_~state_58~0#1|)) (.cse43 (= |ULTIMATE.start_main_~var_15~0#1| (_ bv0 32))) (.cse56 (= |ULTIMATE.start_main_~var_23~0#1| (_ bv0 8))) (.cse59 (= (_ bv1 8) |ULTIMATE.start_main_~var_19~0#1|)) (.cse61 (= (_ bv0 8) |ULTIMATE.start_main_~state_62~0#1|)) (.cse64 (= (_ bv0 8) |ULTIMATE.start_main_~state_60~0#1|)) (.cse65 (= (_ bv0 8) |ULTIMATE.start_main_~state_70~0#1|)) (.cse70 (= (_ bv1 8) |ULTIMATE.start_main_~state_51~0#1|))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 .cse16 .cse17 .cse18 .cse19 .cse20 .cse21 .cse22 .cse23 .cse24 .cse25 .cse26 .cse27 .cse28 .cse29 .cse30 .cse31 .cse32 .cse33 .cse34 .cse35 .cse36 .cse37 .cse38 .cse39 .cse40 .cse41 .cse42 .cse43 .cse44 .cse45 .cse46 .cse47 .cse48 .cse49 .cse50 .cse51 .cse52 .cse53 .cse54 .cse55 .cse56 .cse57 .cse58 .cse59 .cse60 .cse61 .cse62 .cse63 (= |ULTIMATE.start_main_~next_85_arg_1~0#1| (_ bv0 8)) .cse64 .cse65 .cse66 .cse67 .cse68 .cse69 .cse70 .cse71 .cse72 .cse73) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 .cse16 .cse17 .cse18 .cse19 .cse20 .cse21 .cse22 .cse23 .cse24 .cse25 .cse26 .cse27 .cse28 .cse29 .cse30 .cse31 .cse32 .cse33 .cse35 .cse36 .cse37 .cse38 .cse39 .cse40 .cse41 .cse42 .cse43 .cse44 .cse45 .cse46 (= |ULTIMATE.start_main_~var_117_arg_0~0#1| (_ bv0 8)) .cse47 .cse48 .cse49 .cse50 .cse51 .cse52 .cse53 .cse54 .cse55 .cse56 .cse57 .cse58 .cse59 .cse60 .cse61 .cse62 .cse63 .cse64 .cse65 .cse66 .cse67 .cse68 .cse69 .cse70 .cse71 .cse72 .cse73 (= |ULTIMATE.start_main_~var_84_arg_0~0#1| (_ bv0 8))) (and .cse1 .cse7 .cse14 .cse22 .cse23 .cse30 .cse34 (= (_ bv0 8) |ULTIMATE.start_main_~state_43~0#1|) .cse37 .cse39 (= (_ bv0 8) |ULTIMATE.start_main_~state_41~0#1|) .cse42 .cse43 .cse56 .cse59 .cse61 .cse64 .cse65 .cse70)))))) [2022-11-03 03:56:52,646 INFO L899 garLoopResultBuilder]: For program point L116-3(lines 116 384) no Hoare annotation was computed. [2022-11-03 03:56:52,646 INFO L899 garLoopResultBuilder]: For program point L364(line 364) no Hoare annotation was computed. [2022-11-03 03:56:52,647 INFO L899 garLoopResultBuilder]: For program point L364-2(line 364) no Hoare annotation was computed. [2022-11-03 03:56:52,647 INFO L899 garLoopResultBuilder]: For program point L348(line 348) no Hoare annotation was computed. [2022-11-03 03:56:52,647 INFO L899 garLoopResultBuilder]: For program point L348-2(line 348) no Hoare annotation was computed. [2022-11-03 03:56:52,647 INFO L899 garLoopResultBuilder]: For program point L332(line 332) no Hoare annotation was computed. [2022-11-03 03:56:52,647 INFO L899 garLoopResultBuilder]: For program point L332-2(line 332) no Hoare annotation was computed. [2022-11-03 03:56:52,652 INFO L444 BasicCegarLoop]: Path program histogram: [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:52,655 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:56:52,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:56:52 BoogieIcfgContainer [2022-11-03 03:56:52,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:56:52,686 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:56:52,686 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:56:52,686 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:56:52,687 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:50:29" (3/4) ... [2022-11-03 03:56:52,690 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-03 03:56:52,711 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-03 03:56:52,712 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-03 03:56:52,713 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-03 03:56:52,770 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.witnessprinter has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromIASTNode(CACSLBacktranslationValueProvider.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromStep(CACSLBacktranslationValueProvider.java:59) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromStep(CACSLBacktranslationValueProvider.java:1) at de.uni_freiburg.informatik.ultimate.witnessprinter.graphml.GeneratedWitnessEdge.getSourceCode(GeneratedWitnessEdge.java:153) at de.uni_freiburg.informatik.ultimate.witnessprinter.CorrectnessWitnessGenerator.lambda$2(CorrectnessWitnessGenerator.java:95) at edu.uci.ics.jung.io.GraphMLWriter.writeEdgeData(GraphMLWriter.java:237) at de.uni_freiburg.informatik.ultimate.witnessprinter.graphml.UltimateGraphMLWriter.save(UltimateGraphMLWriter.java:106) at de.uni_freiburg.informatik.ultimate.witnessprinter.CorrectnessWitnessGenerator.makeGraphMLString(CorrectnessWitnessGenerator.java:115) at de.uni_freiburg.informatik.ultimate.witnessprinter.WitnessPrinter.generateProofWitness(WitnessPrinter.java:158) at de.uni_freiburg.informatik.ultimate.witnessprinter.WitnessPrinter.finish(WitnessPrinter.java:138) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:131) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 03:56:52,774 INFO L158 Benchmark]: Toolchain (without parser) took 384866.56ms. Allocated memory was 71.3MB in the beginning and 10.0GB in the end (delta: 9.9GB). Free memory was 46.3MB in the beginning and 8.2GB in the end (delta: -8.2GB). Peak memory consumption was 1.7GB. Max. memory is 16.1GB. [2022-11-03 03:56:52,774 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 54.5MB. Free memory is still 33.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:56:52,775 INFO L158 Benchmark]: CACSL2BoogieTranslator took 552.20ms. Allocated memory is still 71.3MB. Free memory was 46.2MB in the beginning and 47.4MB in the end (delta: -1.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 03:56:52,775 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.42ms. Allocated memory is still 71.3MB. Free memory was 47.4MB in the beginning and 43.4MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 03:56:52,775 INFO L158 Benchmark]: Boogie Preprocessor took 96.39ms. Allocated memory is still 71.3MB. Free memory was 43.4MB in the beginning and 40.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:56:52,775 INFO L158 Benchmark]: RCFGBuilder took 1291.84ms. Allocated memory was 71.3MB in the beginning and 92.3MB in the end (delta: 21.0MB). Free memory was 40.6MB in the beginning and 66.0MB in the end (delta: -25.4MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. [2022-11-03 03:56:52,776 INFO L158 Benchmark]: TraceAbstraction took 382767.66ms. Allocated memory was 92.3MB in the beginning and 10.0GB in the end (delta: 9.9GB). Free memory was 65.1MB in the beginning and 8.2GB in the end (delta: -8.1GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. [2022-11-03 03:56:52,776 INFO L158 Benchmark]: Witness Printer took 87.53ms. Allocated memory is still 10.0GB. Free memory was 8.2GB in the beginning and 8.2GB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:56:52,777 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 54.5MB. Free memory is still 33.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 552.20ms. Allocated memory is still 71.3MB. Free memory was 46.2MB in the beginning and 47.4MB in the end (delta: -1.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.42ms. Allocated memory is still 71.3MB. Free memory was 47.4MB in the beginning and 43.4MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 96.39ms. Allocated memory is still 71.3MB. Free memory was 43.4MB in the beginning and 40.6MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1291.84ms. Allocated memory was 71.3MB in the beginning and 92.3MB in the end (delta: 21.0MB). Free memory was 40.6MB in the beginning and 66.0MB in the end (delta: -25.4MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. * TraceAbstraction took 382767.66ms. Allocated memory was 92.3MB in the beginning and 10.0GB in the end (delta: 9.9GB). Free memory was 65.1MB in the beginning and 8.2GB in the end (delta: -8.1GB). Peak memory consumption was 2.5GB. Max. memory is 16.1GB. * Witness Printer took 87.53ms. Allocated memory is still 10.0GB. Free memory was 8.2GB in the beginning and 8.2GB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 20]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 83 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 382.6s, OverallIterations: 62, TraceHistogramMax: 9, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.3s, AutomataDifference: 80.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 15.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 73882 SdHoareTripleChecker+Valid, 17.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 73882 mSDsluCounter, 82263 SdHoareTripleChecker+Invalid, 15.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1879 IncrementalHoareTripleChecker+Unchecked, 70694 mSDsCounter, 2497 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13723 IncrementalHoareTripleChecker+Invalid, 18099 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2497 mSolverCounterUnsat, 11569 mSDtfsCounter, 13723 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 42371 GetRequests, 40812 SyntacticMatches, 37 SemanticMatches, 1522 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53185 ImplicationChecksByTransitivity, 66.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94946occurred in iteration=56, InterpolantAutomatonStates: 1104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 15.1s AutomataMinimizationTime, 62 MinimizatonAttempts, 547920 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 11 NumberOfFragments, 628 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 12.2s HoareSimplificationTime, 2 FomulaSimplificationsInter, 2016307 FormulaSimplificationTreeSizeReductionInter, 2.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 14.2s SsaConstructionTime, 27.2s SatisfiabilityAnalysisTime, 197.1s InterpolantComputationTime, 24170 NumberOfCodeBlocks, 21245 NumberOfCodeBlocksAsserted, 138 NumberOfCheckSat, 41480 ConstructedInterpolants, 4044 QuantifiedInterpolants, 381315 SizeOfPredicates, 1144 NumberOfNonLiveVariables, 98130 ConjunctsInSsa, 1427 ConjunctsInUnsatCore, 170 InterpolantComputations, 48 PerfectInterpolantSequences, 66386/73538 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 116]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((var_145_arg_0 == 0bv8 && 1bv8 == mask_SORT_1) && 0bv8 == var_96_arg_0) && next_91_arg_1 == ~bvand32(1bv32, ~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_23)[7:0])[7:0])[7:0]))[7:0]) && var_110_arg_0 == 0bv8) && ~zero_extendFrom16To32(var_23)[7:0] == var_89_arg_1) && 1bv8 == var_95_arg_0) && 104bv32 == var_78) && next_118_arg_1 == 0bv8) && var_80_arg_0 == var_79) && var_117_arg_2 == 0bv8) && cond == 1bv32) && 1bv8 == var_113_arg_2) && 0bv8 == var_115_arg_0) && 1023bv16 == mask_SORT_7) && ~zero_extendFrom16To32(~zero_extendFrom16To32(var_23)[7:0])[7:0] == var_96_arg_2) && ~bvand32(1bv32, ~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_23)[7:0])[7:0])[7:0]))[7:0] == state_41) && var_113_arg_0 == 0bv8) && var_119 == 0bv8) && next_133_arg_1 == 0bv8) && 0bv8 == next_135_arg_1) && 1bv8 == var_121_arg_1) && ~bvand32(1bv32, ~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_23)[7:0])[7:0])[7:0]))[7:0] == state_26) && 0bv8 == state_64) && var_93_arg_2 == var_23) && var_146_arg_2 == 0bv8) && 1bv8 == var_94) && var_119_arg_2 == 0bv8) && !(var_89_arg_0 == 0bv8)) && var_134_arg_2 == 0bv8) && 3bv8 == mask_SORT_11) && var_143_arg_0 == 0bv8) && var_117_arg_1 == 0bv8) && next_116_arg_1 == 0bv8) && 0bv8 == state_24) && var_142_arg_0 == 0bv8) && var_80_arg_0 == 0bv8) && 0bv16 == state_9) && 1bv8 == var_87_arg_1) && var_74 == 1bv32) && var_90_arg_0 == 0bv8) && var_119_arg_0 == 0bv8) && 0bv8 == state_58) && var_15 == 0bv32) && var_99_arg_0 == 0bv8) && var_93_arg_0 == 0bv8) && var_141_arg_0 == 0bv8) && next_97_arg_1 == ~bvand32(1bv32, ~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_23)[7:0])[7:0])[7:0]))[7:0]) && var_87_arg_2 == var_23) && 0bv16 == var_82_arg_2) && var_109_arg_0 == 0bv8) && var_108_arg_0 == 0bv8) && var_132_arg_0 == 0bv8) && 0bv16 == next_83_arg_1) && var_131_arg_0 == 0bv8) && var_95_arg_1 == ~zero_extendFrom16To32(var_23)[7:0]) && var_23 == 0bv8) && var_146_arg_0 == 0bv8) && 0bv8 == var_115_arg_2) && 1bv8 == var_19) && ~zero_extendFrom16To32(~zero_extendFrom16To32(var_23)[7:0])[7:0] == var_90_arg_2) && 0bv8 == state_62) && var_87_arg_0 == 0bv8) && var_121_arg_0 == 0bv8) && next_85_arg_1 == 0bv8) && 0bv8 == state_60) && 0bv8 == state_70) && var_81_arg_0 == 0bv8) && var_84_arg_1 == 0bv8) && var_111_arg_0 == 0bv8) && var_132_arg_2 == 0bv8) && 1bv8 == state_51) && var_82_arg_0 == 0bv8) && 1bv8 == next_114_arg_1) && var_102_arg_0 == 0bv8) || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((var_145_arg_0 == 0bv8 && 1bv8 == mask_SORT_1) && 0bv8 == var_96_arg_0) && next_91_arg_1 == ~bvand32(1bv32, ~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_23)[7:0])[7:0])[7:0]))[7:0]) && var_110_arg_0 == 0bv8) && ~zero_extendFrom16To32(var_23)[7:0] == var_89_arg_1) && 1bv8 == var_95_arg_0) && 104bv32 == var_78) && next_118_arg_1 == 0bv8) && var_80_arg_0 == var_79) && var_117_arg_2 == 0bv8) && cond == 1bv32) && 1bv8 == var_113_arg_2) && 0bv8 == var_115_arg_0) && 1023bv16 == mask_SORT_7) && ~zero_extendFrom16To32(~zero_extendFrom16To32(var_23)[7:0])[7:0] == var_96_arg_2) && ~bvand32(1bv32, ~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_23)[7:0])[7:0])[7:0]))[7:0] == state_41) && var_113_arg_0 == 0bv8) && var_119 == 0bv8) && next_133_arg_1 == 0bv8) && 0bv8 == next_135_arg_1) && 1bv8 == var_121_arg_1) && ~bvand32(1bv32, ~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_23)[7:0])[7:0])[7:0]))[7:0] == state_26) && 0bv8 == state_64) && var_93_arg_2 == var_23) && var_146_arg_2 == 0bv8) && 1bv8 == var_94) && var_119_arg_2 == 0bv8) && !(var_89_arg_0 == 0bv8)) && var_134_arg_2 == 0bv8) && 3bv8 == mask_SORT_11) && var_143_arg_0 == 0bv8) && var_117_arg_1 == 0bv8) && next_116_arg_1 == 0bv8) && var_142_arg_0 == 0bv8) && var_80_arg_0 == 0bv8) && 0bv16 == state_9) && 1bv8 == var_87_arg_1) && var_74 == 1bv32) && var_90_arg_0 == 0bv8) && var_119_arg_0 == 0bv8) && 0bv8 == state_58) && var_15 == 0bv32) && var_99_arg_0 == 0bv8) && var_93_arg_0 == 0bv8) && var_141_arg_0 == 0bv8) && var_117_arg_0 == 0bv8) && next_97_arg_1 == ~bvand32(1bv32, ~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_23)[7:0])[7:0])[7:0]))[7:0]) && var_87_arg_2 == var_23) && 0bv16 == var_82_arg_2) && var_109_arg_0 == 0bv8) && var_108_arg_0 == 0bv8) && var_132_arg_0 == 0bv8) && 0bv16 == next_83_arg_1) && var_131_arg_0 == 0bv8) && var_95_arg_1 == ~zero_extendFrom16To32(var_23)[7:0]) && var_23 == 0bv8) && var_146_arg_0 == 0bv8) && 0bv8 == var_115_arg_2) && 1bv8 == var_19) && ~zero_extendFrom16To32(~zero_extendFrom16To32(var_23)[7:0])[7:0] == var_90_arg_2) && 0bv8 == state_62) && var_87_arg_0 == 0bv8) && var_121_arg_0 == 0bv8) && 0bv8 == state_60) && 0bv8 == state_70) && var_81_arg_0 == 0bv8) && var_84_arg_1 == 0bv8) && var_111_arg_0 == 0bv8) && var_132_arg_2 == 0bv8) && 1bv8 == state_51) && var_82_arg_0 == 0bv8) && 1bv8 == next_114_arg_1) && var_102_arg_0 == 0bv8) && var_84_arg_0 == 0bv8)) || ((((((((((((((((((1bv8 == mask_SORT_1 && 104bv32 == var_78) && 1023bv16 == mask_SORT_7) && ~bvand32(1bv32, ~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_23)[7:0])[7:0])[7:0]))[7:0] == state_26) && 0bv8 == state_64) && 3bv8 == mask_SORT_11) && 0bv8 == state_24) && 0bv8 == state_43) && 0bv16 == state_9) && var_74 == 1bv32) && 0bv8 == state_41) && 0bv8 == state_58) && var_15 == 0bv32) && var_23 == 0bv8) && 1bv8 == var_19) && 0bv8 == state_62) && 0bv8 == state_60) && 0bv8 == state_70) && 1bv8 == state_51) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 0 * Results from de.uni_freiburg.informatik.ultimate.witnessprinter: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.witnessprinter: NullPointerException: null: de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromIASTNode(CACSLBacktranslationValueProvider.java:78) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 03:56:52,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caf41468-6348-404b-abc8-950e289680df/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null