./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ff1cedc7411bab7c4dff496b498f1be2a7af9e572a1448d390780005c75fec3 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:54:28,284 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:54:28,353 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:54:28,359 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:54:28,359 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:54:28,383 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:54:28,384 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:54:28,384 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:54:28,384 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:54:28,384 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:54:28,385 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:54:28,385 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:54:28,385 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:54:28,385 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:54:28,386 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:54:28,386 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:54:28,386 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:54:28,386 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:54:28,386 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:54:28,386 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:54:28,386 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:54:28,387 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:54:28,387 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:54:28,387 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:54:28,387 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:54:28,387 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:54:28,387 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:54:28,388 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:54:28,388 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:54:28,388 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:54:28,388 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:54:28,388 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:54:28,388 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:54:28,388 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:54:28,388 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:54:28,388 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:54:28,389 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:54:28,389 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:54:28,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:54:28,390 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:54:28,390 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:54:28,390 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:54:28,391 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:54:28,391 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:54:28,391 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:54:28,391 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:54:28,391 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:54:28,391 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ff1cedc7411bab7c4dff496b498f1be2a7af9e572a1448d390780005c75fec3 [2024-11-14 04:54:28,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:54:28,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:54:28,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:54:28,736 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:54:28,737 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:54:28,738 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.UNBOUNDED.pals.c Unable to find full path for "g++" [2024-11-14 04:54:30,695 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:54:31,050 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:54:31,051 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.UNBOUNDED.pals.c [2024-11-14 04:54:31,063 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/data/8380fa318/83ef400704ae4780aa52d0afcb094813/FLAG1c3512d9e [2024-11-14 04:54:31,081 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/data/8380fa318/83ef400704ae4780aa52d0afcb094813 [2024-11-14 04:54:31,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:54:31,086 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:54:31,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:54:31,088 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:54:31,093 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:54:31,094 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:54:31" (1/1) ... [2024-11-14 04:54:31,095 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3676a870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:31, skipping insertion in model container [2024-11-14 04:54:31,095 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:54:31" (1/1) ... [2024-11-14 04:54:31,127 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:54:31,454 WARN L250 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_be68523b-aae3-419f-8ead-533645102447/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.UNBOUNDED.pals.c[12106,12119] [2024-11-14 04:54:31,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:54:31,486 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:54:31,577 WARN L250 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_be68523b-aae3-419f-8ead-533645102447/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_Triplicated.ufo.UNBOUNDED.pals.c[12106,12119] [2024-11-14 04:54:31,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:54:31,596 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:54:31,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:31 WrapperNode [2024-11-14 04:54:31,597 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:54:31,598 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:54:31,598 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:54:31,598 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:54:31,606 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:31" (1/1) ... [2024-11-14 04:54:31,617 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:31" (1/1) ... [2024-11-14 04:54:31,653 INFO L138 Inliner]: procedures = 28, calls = 51, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 420 [2024-11-14 04:54:31,653 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:54:31,654 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:54:31,654 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:54:31,654 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:54:31,662 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:31" (1/1) ... [2024-11-14 04:54:31,663 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:31" (1/1) ... [2024-11-14 04:54:31,667 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:31" (1/1) ... [2024-11-14 04:54:31,671 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:31" (1/1) ... [2024-11-14 04:54:31,693 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:31" (1/1) ... [2024-11-14 04:54:31,703 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:31" (1/1) ... [2024-11-14 04:54:31,709 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:31" (1/1) ... [2024-11-14 04:54:31,714 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:31" (1/1) ... [2024-11-14 04:54:31,725 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:54:31,726 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:54:31,726 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:54:31,726 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:54:31,727 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:31" (1/1) ... [2024-11-14 04:54:31,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:54:31,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:54:31,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:54:31,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:54:31,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:54:31,823 INFO L130 BoogieDeclarations]: Found specification of procedure write_history_bool [2024-11-14 04:54:31,824 INFO L138 BoogieDeclarations]: Found implementation of procedure write_history_bool [2024-11-14 04:54:31,824 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2024-11-14 04:54:31,824 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2024-11-14 04:54:31,825 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_int8 [2024-11-14 04:54:31,825 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_int8 [2024-11-14 04:54:31,825 INFO L130 BoogieDeclarations]: Found specification of procedure read_history_bool [2024-11-14 04:54:31,825 INFO L138 BoogieDeclarations]: Found implementation of procedure read_history_bool [2024-11-14 04:54:31,825 INFO L130 BoogieDeclarations]: Found specification of procedure add_history_type [2024-11-14 04:54:31,825 INFO L138 BoogieDeclarations]: Found implementation of procedure add_history_type [2024-11-14 04:54:31,825 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 04:54:31,825 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 04:54:31,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:54:31,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:54:31,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:54:31,982 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:54:31,984 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:54:32,708 INFO L? ?]: Removed 102 outVars from TransFormulas that were not future-live. [2024-11-14 04:54:32,708 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:54:32,939 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:54:32,939 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 04:54:32,939 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:54:32 BoogieIcfgContainer [2024-11-14 04:54:32,940 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:54:32,942 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:54:32,942 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:54:32,947 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:54:32,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:54:31" (1/3) ... [2024-11-14 04:54:32,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6b52f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:54:32, skipping insertion in model container [2024-11-14 04:54:32,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:54:31" (2/3) ... [2024-11-14 04:54:32,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6b52f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:54:32, skipping insertion in model container [2024-11-14 04:54:32,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:54:32" (3/3) ... [2024-11-14 04:54:32,950 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_Triplicated.ufo.UNBOUNDED.pals.c [2024-11-14 04:54:32,969 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:54:32,971 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pals_STARTPALS_Triplicated.ufo.UNBOUNDED.pals.c that has 7 procedures, 144 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 04:54:33,058 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:54:33,078 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@3f1f32cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:54:33,079 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:54:33,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 99 states have (on average 1.494949494949495) internal successors, (148), 104 states have internal predecessors, (148), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-14 04:54:33,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 04:54:33,095 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:33,095 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:54:33,096 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:33,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1739317316, now seen corresponding path program 1 times [2024-11-14 04:54:33,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:33,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366192161] [2024-11-14 04:54:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:33,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:33,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:54:33,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366192161] [2024-11-14 04:54:33,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366192161] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:33,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:33,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:54:33,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062843173] [2024-11-14 04:54:33,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:33,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:54:33,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:54:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:54:33,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:54:33,562 INFO L87 Difference]: Start difference. First operand has 144 states, 99 states have (on average 1.494949494949495) internal successors, (148), 104 states have internal predecessors, (148), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:54:33,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:33,814 INFO L93 Difference]: Finished difference Result 289 states and 477 transitions. [2024-11-14 04:54:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:54:33,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-14 04:54:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:33,832 INFO L225 Difference]: With dead ends: 289 [2024-11-14 04:54:33,833 INFO L226 Difference]: Without dead ends: 147 [2024-11-14 04:54:33,840 INFO L431 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 [2024-11-14 04:54:33,845 INFO L432 NwaCegarLoop]: 198 mSDtfsCounter, 3 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:33,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 582 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:54:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-14 04:54:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-11-14 04:54:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 102 states have (on average 1.4607843137254901) internal successors, (149), 106 states have internal predecessors, (149), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-14 04:54:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 223 transitions. [2024-11-14 04:54:33,912 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 223 transitions. Word has length 14 [2024-11-14 04:54:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:33,912 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 223 transitions. [2024-11-14 04:54:33,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:54:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 223 transitions. [2024-11-14 04:54:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 04:54:33,915 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:33,918 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:54:33,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:54:33,919 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:33,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:33,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1045234594, now seen corresponding path program 1 times [2024-11-14 04:54:33,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:33,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491862966] [2024-11-14 04:54:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:33,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:34,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:54:34,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491862966] [2024-11-14 04:54:34,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491862966] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:34,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:34,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:54:34,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975305403] [2024-11-14 04:54:34,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:34,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:54:34,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:54:34,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:54:34,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:54:34,075 INFO L87 Difference]: Start difference. First operand 147 states and 223 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:54:34,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:34,292 INFO L93 Difference]: Finished difference Result 306 states and 468 transitions. [2024-11-14 04:54:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:54:34,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-14 04:54:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:34,295 INFO L225 Difference]: With dead ends: 306 [2024-11-14 04:54:34,298 INFO L226 Difference]: Without dead ends: 161 [2024-11-14 04:54:34,300 INFO L431 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 [2024-11-14 04:54:34,304 INFO L432 NwaCegarLoop]: 201 mSDtfsCounter, 22 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:34,304 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 592 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:54:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-14 04:54:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2024-11-14 04:54:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 112 states have (on average 1.4464285714285714) internal successors, (162), 116 states have internal predecessors, (162), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-14 04:54:34,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 238 transitions. [2024-11-14 04:54:34,342 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 238 transitions. Word has length 15 [2024-11-14 04:54:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:34,344 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 238 transitions. [2024-11-14 04:54:34,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:54:34,344 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 238 transitions. [2024-11-14 04:54:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 04:54:34,346 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:34,346 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:54:34,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:54:34,347 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:34,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:34,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1963123426, now seen corresponding path program 1 times [2024-11-14 04:54:34,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:34,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168405304] [2024-11-14 04:54:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:34,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:34,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:54:34,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168405304] [2024-11-14 04:54:34,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168405304] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:34,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:34,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:54:34,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724265780] [2024-11-14 04:54:34,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:34,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:54:34,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:54:34,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:54:34,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:34,505 INFO L87 Difference]: Start difference. First operand 159 states and 238 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 04:54:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:34,601 INFO L93 Difference]: Finished difference Result 338 states and 514 transitions. [2024-11-14 04:54:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:54:34,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-11-14 04:54:34,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:34,605 INFO L225 Difference]: With dead ends: 338 [2024-11-14 04:54:34,605 INFO L226 Difference]: Without dead ends: 188 [2024-11-14 04:54:34,610 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:34,611 INFO L432 NwaCegarLoop]: 201 mSDtfsCounter, 22 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:34,613 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 401 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:54:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-14 04:54:34,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 161. [2024-11-14 04:54:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 114 states have (on average 1.4385964912280702) internal successors, (164), 118 states have internal predecessors, (164), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-14 04:54:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 240 transitions. [2024-11-14 04:54:34,634 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 240 transitions. Word has length 22 [2024-11-14 04:54:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:34,634 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 240 transitions. [2024-11-14 04:54:34,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 04:54:34,635 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 240 transitions. [2024-11-14 04:54:34,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 04:54:34,636 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:34,636 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 04:54:34,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:54:34,637 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:34,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:34,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1643833278, now seen corresponding path program 1 times [2024-11-14 04:54:34,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:34,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513448220] [2024-11-14 04:54:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:34,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:34,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:54:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513448220] [2024-11-14 04:54:34,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513448220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:34,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:34,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:54:34,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342743831] [2024-11-14 04:54:34,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:34,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:54:34,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:54:34,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:54:34,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:54:34,817 INFO L87 Difference]: Start difference. First operand 161 states and 240 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:54:34,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:34,974 INFO L93 Difference]: Finished difference Result 314 states and 471 transitions. [2024-11-14 04:54:34,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:54:34,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-14 04:54:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:34,978 INFO L225 Difference]: With dead ends: 314 [2024-11-14 04:54:34,978 INFO L226 Difference]: Without dead ends: 167 [2024-11-14 04:54:34,979 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:54:34,979 INFO L432 NwaCegarLoop]: 201 mSDtfsCounter, 0 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:34,980 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 797 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:54:34,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-14 04:54:34,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2024-11-14 04:54:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 117 states have (on average 1.4273504273504274) internal successors, (167), 121 states have internal predecessors, (167), 38 states have call successors, (38), 8 states have call predecessors, (38), 9 states have return successors, (39), 39 states have call predecessors, (39), 38 states have call successors, (39) [2024-11-14 04:54:35,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 244 transitions. [2024-11-14 04:54:35,002 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 244 transitions. Word has length 30 [2024-11-14 04:54:35,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:35,002 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 244 transitions. [2024-11-14 04:54:35,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:54:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 244 transitions. [2024-11-14 04:54:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 04:54:35,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:35,004 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:54:35,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:54:35,004 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:35,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:35,005 INFO L85 PathProgramCache]: Analyzing trace with hash -725098936, now seen corresponding path program 1 times [2024-11-14 04:54:35,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:35,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243979565] [2024-11-14 04:54:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:35,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:35,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:54:35,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243979565] [2024-11-14 04:54:35,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243979565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:35,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:35,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:54:35,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171566158] [2024-11-14 04:54:35,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:35,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:54:35,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:54:35,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:54:35,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:54:35,245 INFO L87 Difference]: Start difference. First operand 165 states and 244 transitions. Second operand has 5 states, 3 states have (on average 7.666666666666667) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:54:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:35,412 INFO L93 Difference]: Finished difference Result 279 states and 415 transitions. [2024-11-14 04:54:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:54:35,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 7.666666666666667) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-14 04:54:35,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:35,415 INFO L225 Difference]: With dead ends: 279 [2024-11-14 04:54:35,415 INFO L226 Difference]: Without dead ends: 161 [2024-11-14 04:54:35,415 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:54:35,418 INFO L432 NwaCegarLoop]: 196 mSDtfsCounter, 0 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:35,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 776 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:54:35,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-14 04:54:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-11-14 04:54:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 114 states have (on average 1.4035087719298245) internal successors, (160), 118 states have internal predecessors, (160), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-14 04:54:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 236 transitions. [2024-11-14 04:54:35,449 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 236 transitions. Word has length 31 [2024-11-14 04:54:35,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:35,450 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 236 transitions. [2024-11-14 04:54:35,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 7.666666666666667) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:54:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 236 transitions. [2024-11-14 04:54:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 04:54:35,451 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:35,451 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 04:54:35,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:54:35,451 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:35,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:35,452 INFO L85 PathProgramCache]: Analyzing trace with hash 404261793, now seen corresponding path program 1 times [2024-11-14 04:54:35,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:35,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16078851] [2024-11-14 04:54:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:35,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:35,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:54:35,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16078851] [2024-11-14 04:54:35,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16078851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:54:35,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069715411] [2024-11-14 04:54:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:35,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:35,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:54:35,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:54:35,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:54:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:35,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:54:35,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:35,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:35,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069715411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:35,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [142471227] [2024-11-14 04:54:35,907 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-14 04:54:35,907 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:54:35,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:54:35,915 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:54:35,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:54:37,572 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 57 for LOIs [2024-11-14 04:54:39,462 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 68 for LOIs [2024-11-14 04:54:39,514 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:54:41,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [142471227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:41,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:54:41,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [4, 4, 4] total 20 [2024-11-14 04:54:41,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020385436] [2024-11-14 04:54:41,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:41,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 04:54:41,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:54:41,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 04:54:41,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:54:41,873 INFO L87 Difference]: Start difference. First operand 161 states and 236 transitions. Second operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:54:43,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:43,457 INFO L93 Difference]: Finished difference Result 357 states and 515 transitions. [2024-11-14 04:54:43,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 04:54:43,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2024-11-14 04:54:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:43,460 INFO L225 Difference]: With dead ends: 357 [2024-11-14 04:54:43,460 INFO L226 Difference]: Without dead ends: 211 [2024-11-14 04:54:43,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2024-11-14 04:54:43,464 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 92 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:43,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 658 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 04:54:43,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-14 04:54:43,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2024-11-14 04:54:43,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 145 states have (on average 1.3862068965517242) internal successors, (201), 149 states have internal predecessors, (201), 42 states have call successors, (42), 14 states have call predecessors, (42), 14 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2024-11-14 04:54:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 285 transitions. [2024-11-14 04:54:43,508 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 285 transitions. Word has length 32 [2024-11-14 04:54:43,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:43,510 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 285 transitions. [2024-11-14 04:54:43,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:54:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 285 transitions. [2024-11-14 04:54:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 04:54:43,511 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:43,511 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-14 04:54:43,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:54:43,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:43,716 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:43,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:43,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1317232530, now seen corresponding path program 1 times [2024-11-14 04:54:43,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:43,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635015917] [2024-11-14 04:54:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:43,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:43,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:54:43,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635015917] [2024-11-14 04:54:43,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635015917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:54:43,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972065603] [2024-11-14 04:54:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:43,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:43,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:54:43,813 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:54:43,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:54:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:43,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:54:43,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:43,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:43,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972065603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:43,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2017645728] [2024-11-14 04:54:43,980 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-14 04:54:43,981 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:54:43,982 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:54:43,982 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:54:43,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:54:44,633 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 57 for LOIs [2024-11-14 04:54:45,891 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:54:45,972 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:54:48,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2017645728] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:48,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:54:48,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [4, 4, 4] total 21 [2024-11-14 04:54:48,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534990079] [2024-11-14 04:54:48,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:48,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:54:48,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:54:48,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:54:48,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-11-14 04:54:48,089 INFO L87 Difference]: Start difference. First operand 202 states and 285 transitions. Second operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:54:49,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:49,127 INFO L93 Difference]: Finished difference Result 399 states and 568 transitions. [2024-11-14 04:54:49,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 04:54:49,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2024-11-14 04:54:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:49,130 INFO L225 Difference]: With dead ends: 399 [2024-11-14 04:54:49,130 INFO L226 Difference]: Without dead ends: 212 [2024-11-14 04:54:49,130 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-11-14 04:54:49,135 INFO L432 NwaCegarLoop]: 179 mSDtfsCounter, 79 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:49,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1055 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 04:54:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-14 04:54:49,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 207. [2024-11-14 04:54:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 149 states have (on average 1.3758389261744965) internal successors, (205), 153 states have internal predecessors, (205), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2024-11-14 04:54:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 289 transitions. [2024-11-14 04:54:49,175 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 289 transitions. Word has length 32 [2024-11-14 04:54:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:49,176 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 289 transitions. [2024-11-14 04:54:49,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:54:49,177 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 289 transitions. [2024-11-14 04:54:49,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 04:54:49,181 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:49,181 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-11-14 04:54:49,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:54:49,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:49,382 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:49,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:49,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1708588353, now seen corresponding path program 1 times [2024-11-14 04:54:49,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:49,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736111420] [2024-11-14 04:54:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:49,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:54:49,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:54:49,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736111420] [2024-11-14 04:54:49,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736111420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:54:49,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915214159] [2024-11-14 04:54:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:49,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:49,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:54:49,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:54:49,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:54:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:49,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:54:49,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:54:49,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:54:49,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915214159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:49,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [538566986] [2024-11-14 04:54:49,650 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2024-11-14 04:54:49,650 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:54:49,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:54:49,651 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:54:49,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:54:50,527 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 56 for LOIs [2024-11-14 04:54:51,863 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 56 for LOIs [2024-11-14 04:54:51,890 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:54:54,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [538566986] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:54,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:54:54,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [4, 4, 4] total 23 [2024-11-14 04:54:54,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580221463] [2024-11-14 04:54:54,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:54,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 04:54:54,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:54:54,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 04:54:54,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2024-11-14 04:54:54,676 INFO L87 Difference]: Start difference. First operand 207 states and 289 transitions. Second operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:54:56,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:56,536 INFO L93 Difference]: Finished difference Result 416 states and 583 transitions. [2024-11-14 04:54:56,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 04:54:56,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-11-14 04:54:56,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:56,539 INFO L225 Difference]: With dead ends: 416 [2024-11-14 04:54:56,539 INFO L226 Difference]: Without dead ends: 244 [2024-11-14 04:54:56,541 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:54:56,541 INFO L432 NwaCegarLoop]: 176 mSDtfsCounter, 89 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:56,542 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 981 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 04:54:56,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2024-11-14 04:54:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 228. [2024-11-14 04:54:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 166 states have (on average 1.3795180722891567) internal successors, (229), 170 states have internal predecessors, (229), 45 states have call successors, (45), 16 states have call predecessors, (45), 16 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-11-14 04:54:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 319 transitions. [2024-11-14 04:54:56,578 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 319 transitions. Word has length 47 [2024-11-14 04:54:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:56,579 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 319 transitions. [2024-11-14 04:54:56,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:54:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 319 transitions. [2024-11-14 04:54:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 04:54:56,581 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:56,581 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-11-14 04:54:56,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 04:54:56,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:56,782 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:56,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:56,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2030907404, now seen corresponding path program 1 times [2024-11-14 04:54:56,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:56,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529649816] [2024-11-14 04:54:56,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:56,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:54:56,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:54:56,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529649816] [2024-11-14 04:54:56,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529649816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:54:56,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853014407] [2024-11-14 04:54:56,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:56,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:56,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:54:56,890 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:54:56,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:54:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:57,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:54:57,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:54:57,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:54:57,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853014407] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:57,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [715653145] [2024-11-14 04:54:57,088 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-14 04:54:57,089 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:54:57,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:54:57,089 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:54:57,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:54:57,905 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 56 for LOIs [2024-11-14 04:54:58,961 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 60 for LOIs [2024-11-14 04:54:59,055 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:55:02,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [715653145] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:55:02,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:55:02,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [4, 4, 4] total 24 [2024-11-14 04:55:02,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344817657] [2024-11-14 04:55:02,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:55:02,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 04:55:02,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:55:02,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 04:55:02,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-11-14 04:55:02,038 INFO L87 Difference]: Start difference. First operand 228 states and 319 transitions. Second operand has 20 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 14 states have internal predecessors, (26), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:55:03,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:55:03,865 INFO L93 Difference]: Finished difference Result 429 states and 607 transitions. [2024-11-14 04:55:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 04:55:03,865 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 14 states have internal predecessors, (26), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-11-14 04:55:03,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:55:03,869 INFO L225 Difference]: With dead ends: 429 [2024-11-14 04:55:03,872 INFO L226 Difference]: Without dead ends: 236 [2024-11-14 04:55:03,873 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 120 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2024-11-14 04:55:03,874 INFO L432 NwaCegarLoop]: 172 mSDtfsCounter, 86 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:55:03,874 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1003 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 04:55:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-14 04:55:03,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 226. [2024-11-14 04:55:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 165 states have (on average 1.3636363636363635) internal successors, (225), 169 states have internal predecessors, (225), 44 states have call successors, (44), 16 states have call predecessors, (44), 16 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-14 04:55:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 313 transitions. [2024-11-14 04:55:03,905 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 313 transitions. Word has length 48 [2024-11-14 04:55:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:55:03,905 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 313 transitions. [2024-11-14 04:55:03,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 14 states have internal predecessors, (26), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:55:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 313 transitions. [2024-11-14 04:55:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-14 04:55:03,906 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:55:03,906 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-14 04:55:03,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 04:55:04,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:55:04,107 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:55:04,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:55:04,108 INFO L85 PathProgramCache]: Analyzing trace with hash -127929343, now seen corresponding path program 1 times [2024-11-14 04:55:04,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:55:04,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897326284] [2024-11-14 04:55:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:04,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:55:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 04:55:04,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:55:04,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897326284] [2024-11-14 04:55:04,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897326284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:55:04,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764936295] [2024-11-14 04:55:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:04,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:55:04,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:55:04,200 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:55:04,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:55:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:04,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:55:04,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 04:55:04,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:55:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 04:55:04,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764936295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:55:04,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1641822919] [2024-11-14 04:55:04,404 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2024-11-14 04:55:04,405 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:55:04,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:55:04,408 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:55:04,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:55:05,118 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:55:05,887 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 69 for LOIs [2024-11-14 04:55:05,939 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 57 for LOIs [2024-11-14 04:55:05,949 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:55:09,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1641822919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:55:09,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:55:09,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [4, 4, 4] total 28 [2024-11-14 04:55:09,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089154448] [2024-11-14 04:55:09,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:55:09,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 04:55:09,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:55:09,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 04:55:09,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2024-11-14 04:55:09,264 INFO L87 Difference]: Start difference. First operand 226 states and 313 transitions. Second operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 16 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:55:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:55:11,280 INFO L93 Difference]: Finished difference Result 399 states and 558 transitions. [2024-11-14 04:55:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 04:55:11,281 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 16 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2024-11-14 04:55:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:55:11,283 INFO L225 Difference]: With dead ends: 399 [2024-11-14 04:55:11,283 INFO L226 Difference]: Without dead ends: 234 [2024-11-14 04:55:11,284 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2024-11-14 04:55:11,284 INFO L432 NwaCegarLoop]: 163 mSDtfsCounter, 37 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:55:11,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1367 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-14 04:55:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-14 04:55:11,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 220. [2024-11-14 04:55:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 161 states have (on average 1.3540372670807452) internal successors, (218), 165 states have internal predecessors, (218), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-14 04:55:11,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 304 transitions. [2024-11-14 04:55:11,317 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 304 transitions. Word has length 62 [2024-11-14 04:55:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:55:11,318 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 304 transitions. [2024-11-14 04:55:11,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 16 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:55:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 304 transitions. [2024-11-14 04:55:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-14 04:55:11,319 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:55:11,319 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:55:11,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:55:11,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 04:55:11,523 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:55:11,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:55:11,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1207762353, now seen corresponding path program 1 times [2024-11-14 04:55:11,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:55:11,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427478781] [2024-11-14 04:55:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:11,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:55:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 04:55:11,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:55:11,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427478781] [2024-11-14 04:55:11,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427478781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:55:11,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694391894] [2024-11-14 04:55:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:11,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:55:11,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:55:11,729 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:55:11,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:55:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:11,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:55:11,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 04:55:11,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:55:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 04:55:11,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694391894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:55:11,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767438755] [2024-11-14 04:55:11,985 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2024-11-14 04:55:11,986 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:55:11,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:55:11,986 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:55:11,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:55:12,891 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 112 for LOIs [2024-11-14 04:55:12,921 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 54 for LOIs [2024-11-14 04:55:12,926 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:55:13,958 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 56 for LOIs [2024-11-14 04:55:13,979 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:55:18,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1767438755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:55:18,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:55:18,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [4, 4, 4] total 31 [2024-11-14 04:55:18,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536727346] [2024-11-14 04:55:18,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:55:18,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 04:55:18,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:55:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 04:55:18,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2024-11-14 04:55:18,407 INFO L87 Difference]: Start difference. First operand 220 states and 304 transitions. Second operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 18 states have internal predecessors, (31), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-14 04:55:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:55:23,474 INFO L93 Difference]: Finished difference Result 429 states and 623 transitions. [2024-11-14 04:55:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 04:55:23,475 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 18 states have internal predecessors, (31), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 77 [2024-11-14 04:55:23,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:55:23,478 INFO L225 Difference]: With dead ends: 429 [2024-11-14 04:55:23,478 INFO L226 Difference]: Without dead ends: 318 [2024-11-14 04:55:23,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2024-11-14 04:55:23,480 INFO L432 NwaCegarLoop]: 256 mSDtfsCounter, 183 mSDsluCounter, 2652 mSDsCounter, 0 mSdLazyCounter, 3610 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 3652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:55:23,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 2908 Invalid, 3652 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [42 Valid, 3610 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-14 04:55:23,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2024-11-14 04:55:23,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 302. [2024-11-14 04:55:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 218 states have (on average 1.385321100917431) internal successors, (302), 223 states have internal predecessors, (302), 66 states have call successors, (66), 17 states have call predecessors, (66), 17 states have return successors, (67), 67 states have call predecessors, (67), 66 states have call successors, (67) [2024-11-14 04:55:23,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 435 transitions. [2024-11-14 04:55:23,522 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 435 transitions. Word has length 77 [2024-11-14 04:55:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:55:23,523 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 435 transitions. [2024-11-14 04:55:23,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 18 states have internal predecessors, (31), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-14 04:55:23,523 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 435 transitions. [2024-11-14 04:55:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-14 04:55:23,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:55:23,524 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2024-11-14 04:55:23,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:55:23,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 04:55:23,728 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:55:23,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:55:23,729 INFO L85 PathProgramCache]: Analyzing trace with hash 458931110, now seen corresponding path program 1 times [2024-11-14 04:55:23,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:55:23,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381402616] [2024-11-14 04:55:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:23,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:55:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 04:55:23,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:55:23,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381402616] [2024-11-14 04:55:23,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381402616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:55:23,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377038446] [2024-11-14 04:55:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:23,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:55:23,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:55:23,875 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:55:23,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:55:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:24,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:55:24,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 04:55:24,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:55:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 04:55:24,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377038446] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:55:24,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1790179571] [2024-11-14 04:55:24,134 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2024-11-14 04:55:24,134 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:55:24,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:55:24,134 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:55:24,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:55:24,686 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 57 for LOIs [2024-11-14 04:55:25,555 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 74 for LOIs [2024-11-14 04:55:25,726 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:55:29,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1790179571] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:55:29,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:55:29,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [4, 4, 4] total 25 [2024-11-14 04:55:29,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685024346] [2024-11-14 04:55:29,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:55:29,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 04:55:29,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:55:29,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 04:55:29,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:55:29,342 INFO L87 Difference]: Start difference. First operand 302 states and 435 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 04:55:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:55:31,433 INFO L93 Difference]: Finished difference Result 591 states and 856 transitions. [2024-11-14 04:55:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 04:55:31,434 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 79 [2024-11-14 04:55:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:55:31,439 INFO L225 Difference]: With dead ends: 591 [2024-11-14 04:55:31,440 INFO L226 Difference]: Without dead ends: 311 [2024-11-14 04:55:31,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 213 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2024-11-14 04:55:31,442 INFO L432 NwaCegarLoop]: 178 mSDtfsCounter, 78 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:55:31,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1590 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 04:55:31,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-11-14 04:55:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2024-11-14 04:55:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 222 states have (on average 1.3783783783783783) internal successors, (306), 227 states have internal predecessors, (306), 67 states have call successors, (67), 17 states have call predecessors, (67), 17 states have return successors, (68), 68 states have call predecessors, (68), 67 states have call successors, (68) [2024-11-14 04:55:31,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 441 transitions. [2024-11-14 04:55:31,535 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 441 transitions. Word has length 79 [2024-11-14 04:55:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:55:31,536 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 441 transitions. [2024-11-14 04:55:31,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 04:55:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 441 transitions. [2024-11-14 04:55:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-14 04:55:31,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:55:31,538 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2024-11-14 04:55:31,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 04:55:31,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:55:31,739 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:55:31,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:55:31,739 INFO L85 PathProgramCache]: Analyzing trace with hash 120314716, now seen corresponding path program 1 times [2024-11-14 04:55:31,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:55:31,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856259727] [2024-11-14 04:55:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:31,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:55:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 04:55:31,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:55:31,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856259727] [2024-11-14 04:55:31,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856259727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:55:31,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795492317] [2024-11-14 04:55:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:31,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:55:31,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:55:31,872 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:55:31,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:55:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:32,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:55:32,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-14 04:55:32,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:55:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 04:55:32,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795492317] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:55:32,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475798683] [2024-11-14 04:55:32,152 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2024-11-14 04:55:32,153 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:55:32,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:55:32,154 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:55:32,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:55:33,025 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 140 for LOIs [2024-11-14 04:55:33,065 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2024-11-14 04:55:33,077 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:55:34,527 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:55:34,600 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:55:41,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1475798683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:55:41,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:55:41,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [4, 4, 4] total 39 [2024-11-14 04:55:41,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839912369] [2024-11-14 04:55:41,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:55:41,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 04:55:41,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:55:41,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 04:55:41,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 04:55:41,177 INFO L87 Difference]: Start difference. First operand 307 states and 441 transitions. Second operand has 35 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 23 states have internal predecessors, (38), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 04:55:47,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:55:47,608 INFO L93 Difference]: Finished difference Result 668 states and 990 transitions. [2024-11-14 04:55:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-14 04:55:47,609 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 23 states have internal predecessors, (38), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 83 [2024-11-14 04:55:47,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:55:47,612 INFO L225 Difference]: With dead ends: 668 [2024-11-14 04:55:47,612 INFO L226 Difference]: Without dead ends: 403 [2024-11-14 04:55:47,614 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 210 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 04:55:47,616 INFO L432 NwaCegarLoop]: 208 mSDtfsCounter, 114 mSDsluCounter, 2369 mSDsCounter, 0 mSdLazyCounter, 3689 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 3710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:55:47,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 2577 Invalid, 3710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3689 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2024-11-14 04:55:47,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2024-11-14 04:55:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 307. [2024-11-14 04:55:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 225 states have (on average 1.3911111111111112) internal successors, (313), 229 states have internal predecessors, (313), 66 states have call successors, (66), 16 states have call predecessors, (66), 15 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2024-11-14 04:55:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 445 transitions. [2024-11-14 04:55:47,685 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 445 transitions. Word has length 83 [2024-11-14 04:55:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:55:47,686 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 445 transitions. [2024-11-14 04:55:47,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 23 states have internal predecessors, (38), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 04:55:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 445 transitions. [2024-11-14 04:55:47,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-14 04:55:47,688 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:55:47,688 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2024-11-14 04:55:47,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:55:47,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:55:47,889 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:55:47,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:55:47,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1264937604, now seen corresponding path program 1 times [2024-11-14 04:55:47,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:55:47,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248679038] [2024-11-14 04:55:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:47,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:55:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-14 04:55:48,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:55:48,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248679038] [2024-11-14 04:55:48,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248679038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:55:48,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37227611] [2024-11-14 04:55:48,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:55:48,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:55:48,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:55:48,033 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:55:48,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:55:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:55:48,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:55:48,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:55:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-14 04:55:48,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:55:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-14 04:55:48,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37227611] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:55:48,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [52587781] [2024-11-14 04:55:48,320 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2024-11-14 04:55:48,323 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:55:48,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:55:48,324 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:55:48,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:55:49,365 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 64 for LOIs [2024-11-14 04:55:49,412 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 54 for LOIs [2024-11-14 04:55:49,417 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:55:50,766 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:55:50,932 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:55:57,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [52587781] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:55:57,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:55:57,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [4, 4, 4] total 42 [2024-11-14 04:55:57,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578421272] [2024-11-14 04:55:57,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:55:57,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 04:55:57,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:55:57,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 04:55:57,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1556, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 04:55:57,196 INFO L87 Difference]: Start difference. First operand 307 states and 445 transitions. Second operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 27 states have internal predecessors, (41), 7 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-14 04:56:01,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:56:01,615 INFO L93 Difference]: Finished difference Result 599 states and 898 transitions. [2024-11-14 04:56:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-14 04:56:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 27 states have internal predecessors, (41), 7 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 88 [2024-11-14 04:56:01,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:56:01,619 INFO L225 Difference]: With dead ends: 599 [2024-11-14 04:56:01,619 INFO L226 Difference]: Without dead ends: 414 [2024-11-14 04:56:01,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=234, Invalid=2118, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 04:56:01,621 INFO L432 NwaCegarLoop]: 223 mSDtfsCounter, 196 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 2646 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 2694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:56:01,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1504 Invalid, 2694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2646 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-14 04:56:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2024-11-14 04:56:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 396. [2024-11-14 04:56:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 287 states have (on average 1.4041811846689896) internal successors, (403), 293 states have internal predecessors, (403), 89 states have call successors, (89), 19 states have call predecessors, (89), 19 states have return successors, (90), 90 states have call predecessors, (90), 89 states have call successors, (90) [2024-11-14 04:56:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 582 transitions. [2024-11-14 04:56:01,701 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 582 transitions. Word has length 88 [2024-11-14 04:56:01,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:56:01,702 INFO L471 AbstractCegarLoop]: Abstraction has 396 states and 582 transitions. [2024-11-14 04:56:01,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 27 states have internal predecessors, (41), 7 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-14 04:56:01,702 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 582 transitions. [2024-11-14 04:56:01,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-14 04:56:01,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:56:01,704 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2024-11-14 04:56:01,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:56:01,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 04:56:01,905 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:56:01,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:56:01,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1035034171, now seen corresponding path program 1 times [2024-11-14 04:56:01,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:56:01,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312165223] [2024-11-14 04:56:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:56:01,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:56:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 04:56:02,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:56:02,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312165223] [2024-11-14 04:56:02,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312165223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:56:02,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771739752] [2024-11-14 04:56:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:56:02,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:56:02,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:56:02,039 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:56:02,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:56:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:02,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:56:02,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:56:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-14 04:56:02,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:56:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 04:56:02,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771739752] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:56:02,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [718678740] [2024-11-14 04:56:02,313 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2024-11-14 04:56:02,314 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:56:02,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:56:02,314 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:56:02,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:56:03,749 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 67 for LOIs [2024-11-14 04:56:03,802 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2024-11-14 04:56:03,814 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:56:04,861 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:56:04,931 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:56:12,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [718678740] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:56:12,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:56:12,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [4, 4, 4] total 44 [2024-11-14 04:56:12,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245427186] [2024-11-14 04:56:12,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:56:12,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-14 04:56:12,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:56:12,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-14 04:56:12,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1717, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 04:56:12,024 INFO L87 Difference]: Start difference. First operand 396 states and 582 transitions. Second operand has 40 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 27 states have internal predecessors, (42), 7 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-14 04:56:17,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:56:17,595 INFO L93 Difference]: Finished difference Result 601 states and 899 transitions. [2024-11-14 04:56:17,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-14 04:56:17,596 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 27 states have internal predecessors, (42), 7 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 90 [2024-11-14 04:56:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:56:17,601 INFO L225 Difference]: With dead ends: 601 [2024-11-14 04:56:17,602 INFO L226 Difference]: Without dead ends: 416 [2024-11-14 04:56:17,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 226 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 04:56:17,604 INFO L432 NwaCegarLoop]: 207 mSDtfsCounter, 116 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:56:17,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1127 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2425 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-14 04:56:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2024-11-14 04:56:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 314. [2024-11-14 04:56:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 230 states have (on average 1.3869565217391304) internal successors, (319), 235 states have internal predecessors, (319), 66 states have call successors, (66), 17 states have call predecessors, (66), 17 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2024-11-14 04:56:17,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 451 transitions. [2024-11-14 04:56:17,688 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 451 transitions. Word has length 90 [2024-11-14 04:56:17,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:56:17,689 INFO L471 AbstractCegarLoop]: Abstraction has 314 states and 451 transitions. [2024-11-14 04:56:17,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 27 states have internal predecessors, (42), 7 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-14 04:56:17,689 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 451 transitions. [2024-11-14 04:56:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-14 04:56:17,694 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:56:17,694 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2024-11-14 04:56:17,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:56:17,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:56:17,894 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:56:17,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:56:17,895 INFO L85 PathProgramCache]: Analyzing trace with hash -35396283, now seen corresponding path program 1 times [2024-11-14 04:56:17,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:56:17,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315571213] [2024-11-14 04:56:17,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:56:17,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:56:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 04:56:18,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:56:18,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315571213] [2024-11-14 04:56:18,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315571213] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:56:18,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65813310] [2024-11-14 04:56:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:56:18,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:56:18,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:56:18,026 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:56:18,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:56:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:18,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:56:18,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:56:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-14 04:56:18,240 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:56:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 04:56:18,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65813310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:56:18,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2054943111] [2024-11-14 04:56:18,331 INFO L159 IcfgInterpreter]: Started Sifa with 53 locations of interest [2024-11-14 04:56:18,334 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:56:18,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:56:18,334 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:56:18,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:56:19,843 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 61 for LOIs [2024-11-14 04:56:19,893 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 111 for LOIs [2024-11-14 04:56:19,966 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:56:21,163 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:56:21,255 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:56:29,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2054943111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:56:29,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:56:29,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [4, 4, 4] total 45 [2024-11-14 04:56:29,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348700576] [2024-11-14 04:56:29,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:56:29,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 04:56:29,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:56:29,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 04:56:29,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1809, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 04:56:29,318 INFO L87 Difference]: Start difference. First operand 314 states and 451 transitions. Second operand has 41 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 28 states have internal predecessors, (42), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 04:56:35,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:56:35,998 INFO L93 Difference]: Finished difference Result 543 states and 791 transitions. [2024-11-14 04:56:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 04:56:35,999 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 28 states have internal predecessors, (42), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 92 [2024-11-14 04:56:35,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:56:36,002 INFO L225 Difference]: With dead ends: 543 [2024-11-14 04:56:36,002 INFO L226 Difference]: Without dead ends: 430 [2024-11-14 04:56:36,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=244, Invalid=2512, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 04:56:36,004 INFO L432 NwaCegarLoop]: 230 mSDtfsCounter, 192 mSDsluCounter, 2413 mSDsCounter, 0 mSdLazyCounter, 3885 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 2643 SdHoareTripleChecker+Invalid, 3932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 3885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:56:36,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 2643 Invalid, 3932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 3885 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-14 04:56:36,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2024-11-14 04:56:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 414. [2024-11-14 04:56:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 299 states have (on average 1.391304347826087) internal successors, (416), 307 states have internal predecessors, (416), 91 states have call successors, (91), 22 states have call predecessors, (91), 23 states have return successors, (92), 91 states have call predecessors, (92), 91 states have call successors, (92) [2024-11-14 04:56:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 599 transitions. [2024-11-14 04:56:36,106 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 599 transitions. Word has length 92 [2024-11-14 04:56:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:56:36,106 INFO L471 AbstractCegarLoop]: Abstraction has 414 states and 599 transitions. [2024-11-14 04:56:36,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 28 states have internal predecessors, (42), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 04:56:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 599 transitions. [2024-11-14 04:56:36,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-14 04:56:36,108 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:56:36,108 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2024-11-14 04:56:36,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:56:36,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:56:36,309 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:56:36,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:56:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1095326450, now seen corresponding path program 1 times [2024-11-14 04:56:36,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:56:36,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353199976] [2024-11-14 04:56:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:56:36,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:56:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 04:56:36,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:56:36,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353199976] [2024-11-14 04:56:36,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353199976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:56:36,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191929459] [2024-11-14 04:56:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:56:36,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:56:36,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:56:36,413 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:56:36,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:56:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:36,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:56:36,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:56:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 04:56:36,606 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:56:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 04:56:36,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191929459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:56:36,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1506772496] [2024-11-14 04:56:36,687 INFO L159 IcfgInterpreter]: Started Sifa with 53 locations of interest [2024-11-14 04:56:36,687 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:56:36,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:56:36,688 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:56:36,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:56:38,008 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 64 for LOIs [2024-11-14 04:56:38,049 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 148 for LOIs [2024-11-14 04:56:38,111 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:56:39,319 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:56:39,403 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:56:48,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1506772496] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:56:48,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:56:48,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [4, 4, 4] total 46 [2024-11-14 04:56:48,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354408748] [2024-11-14 04:56:48,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:56:48,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 04:56:48,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:56:48,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 04:56:48,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1895, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 04:56:48,350 INFO L87 Difference]: Start difference. First operand 414 states and 599 transitions. Second operand has 42 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 28 states have internal predecessors, (43), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 04:56:55,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:56:55,698 INFO L93 Difference]: Finished difference Result 550 states and 798 transitions. [2024-11-14 04:56:55,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-14 04:56:55,699 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 28 states have internal predecessors, (43), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 94 [2024-11-14 04:56:55,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:56:55,701 INFO L225 Difference]: With dead ends: 550 [2024-11-14 04:56:55,701 INFO L226 Difference]: Without dead ends: 437 [2024-11-14 04:56:55,703 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 236 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=253, Invalid=2717, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 04:56:55,703 INFO L432 NwaCegarLoop]: 205 mSDtfsCounter, 182 mSDsluCounter, 1998 mSDsCounter, 0 mSdLazyCounter, 3438 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 2203 SdHoareTripleChecker+Invalid, 3491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:56:55,704 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 2203 Invalid, 3491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3438 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-11-14 04:56:55,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2024-11-14 04:56:55,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 325. [2024-11-14 04:56:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 237 states have (on average 1.3755274261603376) internal successors, (326), 243 states have internal predecessors, (326), 68 states have call successors, (68), 19 states have call predecessors, (68), 19 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2024-11-14 04:56:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 462 transitions. [2024-11-14 04:56:55,790 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 462 transitions. Word has length 94 [2024-11-14 04:56:55,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:56:55,790 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 462 transitions. [2024-11-14 04:56:55,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 28 states have internal predecessors, (43), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 04:56:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 462 transitions. [2024-11-14 04:56:55,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-14 04:56:55,792 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:56:55,792 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:56:55,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:56:55,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 04:56:55,993 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:56:55,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:56:55,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1978334856, now seen corresponding path program 1 times [2024-11-14 04:56:55,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:56:55,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815486937] [2024-11-14 04:56:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:56:55,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:56:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 04:56:56,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:56:56,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815486937] [2024-11-14 04:56:56,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815486937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:56:56,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189752080] [2024-11-14 04:56:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:56:56,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:56:56,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:56:56,115 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:56:56,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:56:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:56,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:56:56,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:56:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-14 04:56:56,328 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:56:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 04:56:56,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189752080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:56:56,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1768062371] [2024-11-14 04:56:56,419 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-14 04:56:56,419 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:56:56,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:56:56,419 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:56:56,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:56:57,606 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 65 for LOIs [2024-11-14 04:56:57,679 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 54 for LOIs [2024-11-14 04:56:57,683 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:56:58,625 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:56:58,704 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:57:05,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1768062371] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:57:05,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:57:05,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [4, 4, 4] total 43 [2024-11-14 04:57:05,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431364323] [2024-11-14 04:57:05,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:57:05,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 04:57:05,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:57:05,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 04:57:05,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 04:57:05,019 INFO L87 Difference]: Start difference. First operand 325 states and 462 transitions. Second operand has 39 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 29 states have internal predecessors, (44), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 04:57:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:57:11,353 INFO L93 Difference]: Finished difference Result 642 states and 939 transitions. [2024-11-14 04:57:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-14 04:57:11,353 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 29 states have internal predecessors, (44), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 96 [2024-11-14 04:57:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:57:11,356 INFO L225 Difference]: With dead ends: 642 [2024-11-14 04:57:11,356 INFO L226 Difference]: Without dead ends: 437 [2024-11-14 04:57:11,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=235, Invalid=2117, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 04:57:11,358 INFO L432 NwaCegarLoop]: 249 mSDtfsCounter, 116 mSDsluCounter, 3150 mSDsCounter, 0 mSdLazyCounter, 4737 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 3399 SdHoareTripleChecker+Invalid, 4750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 4737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:57:11,358 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 3399 Invalid, 4750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 4737 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-11-14 04:57:11,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2024-11-14 04:57:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 420. [2024-11-14 04:57:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 304 states have (on average 1.3848684210526316) internal successors, (421), 312 states have internal predecessors, (421), 91 states have call successors, (91), 23 states have call predecessors, (91), 24 states have return successors, (92), 91 states have call predecessors, (92), 91 states have call successors, (92) [2024-11-14 04:57:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 604 transitions. [2024-11-14 04:57:11,464 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 604 transitions. Word has length 96 [2024-11-14 04:57:11,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:57:11,464 INFO L471 AbstractCegarLoop]: Abstraction has 420 states and 604 transitions. [2024-11-14 04:57:11,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 29 states have internal predecessors, (44), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 04:57:11,464 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 604 transitions. [2024-11-14 04:57:11,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-14 04:57:11,466 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:57:11,466 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:57:11,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 04:57:11,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 04:57:11,667 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:57:11,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:57:11,667 INFO L85 PathProgramCache]: Analyzing trace with hash 545305793, now seen corresponding path program 1 times [2024-11-14 04:57:11,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:57:11,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281208921] [2024-11-14 04:57:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:57:11,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:57:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:57:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 04:57:11,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:57:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281208921] [2024-11-14 04:57:11,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281208921] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:57:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744973517] [2024-11-14 04:57:11,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:57:11,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:57:11,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:57:11,786 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:57:11,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:57:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:57:11,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:57:11,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:57:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 04:57:12,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:57:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 04:57:12,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744973517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:57:12,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1914021038] [2024-11-14 04:57:12,083 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-14 04:57:12,083 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:57:12,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:57:12,084 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:57:12,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:57:13,583 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 65 for LOIs [2024-11-14 04:57:13,659 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2024-11-14 04:57:13,671 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:57:14,767 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:57:14,838 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:57:22,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1914021038] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:57:22,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:57:22,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [4, 4, 4] total 46 [2024-11-14 04:57:22,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029714231] [2024-11-14 04:57:22,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:57:22,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-14 04:57:22,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:57:22,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-14 04:57:22,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 04:57:22,008 INFO L87 Difference]: Start difference. First operand 420 states and 604 transitions. Second operand has 42 states, 36 states have (on average 1.25) internal successors, (45), 30 states have internal predecessors, (45), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 04:57:26,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:57:26,618 INFO L93 Difference]: Finished difference Result 643 states and 938 transitions. [2024-11-14 04:57:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-14 04:57:26,619 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 36 states have (on average 1.25) internal successors, (45), 30 states have internal predecessors, (45), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 98 [2024-11-14 04:57:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:57:26,622 INFO L225 Difference]: With dead ends: 643 [2024-11-14 04:57:26,623 INFO L226 Difference]: Without dead ends: 438 [2024-11-14 04:57:26,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 249 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=249, Invalid=2403, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 04:57:26,624 INFO L432 NwaCegarLoop]: 203 mSDtfsCounter, 267 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:57:26,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 924 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-14 04:57:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-11-14 04:57:26,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 331. [2024-11-14 04:57:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 242 states have (on average 1.3677685950413223) internal successors, (331), 248 states have internal predecessors, (331), 68 states have call successors, (68), 20 states have call predecessors, (68), 20 states have return successors, (68), 67 states have call predecessors, (68), 68 states have call successors, (68) [2024-11-14 04:57:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 467 transitions. [2024-11-14 04:57:26,722 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 467 transitions. Word has length 98 [2024-11-14 04:57:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:57:26,723 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 467 transitions. [2024-11-14 04:57:26,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 36 states have (on average 1.25) internal successors, (45), 30 states have internal predecessors, (45), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-14 04:57:26,723 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 467 transitions. [2024-11-14 04:57:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-14 04:57:26,725 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:57:26,725 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2024-11-14 04:57:26,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 04:57:26,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:57:26,929 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:57:26,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:57:26,930 INFO L85 PathProgramCache]: Analyzing trace with hash 2014262195, now seen corresponding path program 1 times [2024-11-14 04:57:26,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:57:26,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016059366] [2024-11-14 04:57:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:57:26,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:57:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:57:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 04:57:27,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:57:27,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016059366] [2024-11-14 04:57:27,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016059366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:57:27,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356860580] [2024-11-14 04:57:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:57:27,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:57:27,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:57:27,036 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:57:27,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 04:57:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:57:27,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:57:27,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:57:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 04:57:27,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:57:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 04:57:27,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356860580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:57:27,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1570169693] [2024-11-14 04:57:27,374 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2024-11-14 04:57:27,374 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:57:27,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:57:27,374 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:57:27,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:57:28,989 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 04:57:29,096 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2024-11-14 04:57:29,197 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:57:30,462 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:57:30,543 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:57:38,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1570169693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:57:38,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:57:38,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [4, 4, 4] total 47 [2024-11-14 04:57:38,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169421320] [2024-11-14 04:57:38,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:57:38,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 04:57:38,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:57:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 04:57:38,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1981, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 04:57:38,473 INFO L87 Difference]: Start difference. First operand 331 states and 467 transitions. Second operand has 43 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 31 states have internal predecessors, (45), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 04:57:47,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:57:47,159 INFO L93 Difference]: Finished difference Result 584 states and 841 transitions. [2024-11-14 04:57:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 04:57:47,159 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 31 states have internal predecessors, (45), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 100 [2024-11-14 04:57:47,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:57:47,163 INFO L225 Difference]: With dead ends: 584 [2024-11-14 04:57:47,164 INFO L226 Difference]: Without dead ends: 471 [2024-11-14 04:57:47,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=261, Invalid=2819, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 04:57:47,166 INFO L432 NwaCegarLoop]: 257 mSDtfsCounter, 200 mSDsluCounter, 3624 mSDsCounter, 0 mSdLazyCounter, 5764 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 3881 SdHoareTripleChecker+Invalid, 5815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 5764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:57:47,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 3881 Invalid, 5815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 5764 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2024-11-14 04:57:47,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2024-11-14 04:57:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 439. [2024-11-14 04:57:47,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 317 states have (on average 1.3690851735015772) internal successors, (434), 327 states have internal predecessors, (434), 94 states have call successors, (94), 26 states have call predecessors, (94), 27 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2024-11-14 04:57:47,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 623 transitions. [2024-11-14 04:57:47,299 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 623 transitions. Word has length 100 [2024-11-14 04:57:47,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:57:47,299 INFO L471 AbstractCegarLoop]: Abstraction has 439 states and 623 transitions. [2024-11-14 04:57:47,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 31 states have internal predecessors, (45), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 04:57:47,300 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 623 transitions. [2024-11-14 04:57:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-14 04:57:47,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:57:47,302 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2024-11-14 04:57:47,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 04:57:47,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:57:47,502 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:57:47,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:57:47,503 INFO L85 PathProgramCache]: Analyzing trace with hash 39483457, now seen corresponding path program 1 times [2024-11-14 04:57:47,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:57:47,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597641008] [2024-11-14 04:57:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:57:47,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:57:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:57:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 04:57:47,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:57:47,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597641008] [2024-11-14 04:57:47,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597641008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:57:47,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732702779] [2024-11-14 04:57:47,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:57:47,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:57:47,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:57:47,628 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:57:47,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 04:57:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:57:47,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:57:47,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:57:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 04:57:47,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:57:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 04:57:47,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732702779] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:57:47,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577270711] [2024-11-14 04:57:47,920 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2024-11-14 04:57:47,920 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:57:47,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:57:47,920 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:57:47,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:57:49,224 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 04:57:49,292 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 119 for LOIs [2024-11-14 04:57:49,354 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:57:50,419 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:57:50,507 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:57:58,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1577270711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:57:58,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:57:58,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [4, 4, 4] total 47 [2024-11-14 04:57:58,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685724520] [2024-11-14 04:57:58,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:57:58,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 04:57:58,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:57:58,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 04:57:58,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1977, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 04:57:58,305 INFO L87 Difference]: Start difference. First operand 439 states and 623 transitions. Second operand has 43 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 31 states have internal predecessors, (45), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 04:58:05,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:58:05,110 INFO L93 Difference]: Finished difference Result 601 states and 860 transitions. [2024-11-14 04:58:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-14 04:58:05,111 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 31 states have internal predecessors, (45), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 100 [2024-11-14 04:58:05,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:58:05,114 INFO L225 Difference]: With dead ends: 601 [2024-11-14 04:58:05,114 INFO L226 Difference]: Without dead ends: 488 [2024-11-14 04:58:05,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=257, Invalid=2713, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 04:58:05,116 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 244 mSDsluCounter, 2244 mSDsCounter, 0 mSdLazyCounter, 4359 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 2508 SdHoareTripleChecker+Invalid, 4419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 4359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:58:05,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 2508 Invalid, 4419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 4359 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-14 04:58:05,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2024-11-14 04:58:05,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 451. [2024-11-14 04:58:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 325 states have (on average 1.363076923076923) internal successors, (443), 335 states have internal predecessors, (443), 96 states have call successors, (96), 28 states have call predecessors, (96), 29 states have return successors, (97), 94 states have call predecessors, (97), 96 states have call successors, (97) [2024-11-14 04:58:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 636 transitions. [2024-11-14 04:58:05,225 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 636 transitions. Word has length 100 [2024-11-14 04:58:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:58:05,225 INFO L471 AbstractCegarLoop]: Abstraction has 451 states and 636 transitions. [2024-11-14 04:58:05,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 31 states have internal predecessors, (45), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 04:58:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 636 transitions. [2024-11-14 04:58:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 04:58:05,226 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:58:05,226 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:58:05,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 04:58:05,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 04:58:05,430 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:58:05,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:58:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1083303300, now seen corresponding path program 1 times [2024-11-14 04:58:05,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:58:05,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079428914] [2024-11-14 04:58:05,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:05,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:58:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 04:58:05,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:58:05,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079428914] [2024-11-14 04:58:05,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079428914] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:58:05,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319628889] [2024-11-14 04:58:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:05,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:05,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:58:05,548 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:58:05,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 04:58:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:05,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:58:05,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:58:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 04:58:05,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:58:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 04:58:05,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319628889] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:58:05,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [336884212] [2024-11-14 04:58:05,820 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2024-11-14 04:58:05,820 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:58:05,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:58:05,821 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:58:05,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:58:07,345 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 04:58:07,433 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 128 for LOIs [2024-11-14 04:58:07,568 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:58:08,441 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:58:08,525 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:58:17,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [336884212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:58:17,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:58:17,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [4, 4, 4] total 48 [2024-11-14 04:58:17,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259181342] [2024-11-14 04:58:17,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:58:17,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 04:58:17,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:58:17,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 04:58:17,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2070, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 04:58:17,599 INFO L87 Difference]: Start difference. First operand 451 states and 636 transitions. Second operand has 44 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 31 states have internal predecessors, (46), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 04:58:24,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:58:24,224 INFO L93 Difference]: Finished difference Result 608 states and 867 transitions. [2024-11-14 04:58:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 04:58:24,225 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 31 states have internal predecessors, (46), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 102 [2024-11-14 04:58:24,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:58:24,228 INFO L225 Difference]: With dead ends: 608 [2024-11-14 04:58:24,228 INFO L226 Difference]: Without dead ends: 495 [2024-11-14 04:58:24,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 258 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=272, Invalid=3034, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 04:58:24,231 INFO L432 NwaCegarLoop]: 207 mSDtfsCounter, 280 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 3078 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 3157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:58:24,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 1541 Invalid, 3157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3078 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-14 04:58:24,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2024-11-14 04:58:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 455. [2024-11-14 04:58:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 326 states have (on average 1.361963190184049) internal successors, (444), 338 states have internal predecessors, (444), 98 states have call successors, (98), 29 states have call predecessors, (98), 30 states have return successors, (99), 94 states have call predecessors, (99), 98 states have call successors, (99) [2024-11-14 04:58:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 641 transitions. [2024-11-14 04:58:24,342 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 641 transitions. Word has length 102 [2024-11-14 04:58:24,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:58:24,345 INFO L471 AbstractCegarLoop]: Abstraction has 455 states and 641 transitions. [2024-11-14 04:58:24,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 31 states have internal predecessors, (46), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 04:58:24,345 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 641 transitions. [2024-11-14 04:58:24,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 04:58:24,346 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:58:24,346 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:58:24,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 04:58:24,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 04:58:24,547 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:58:24,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:58:24,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1236885258, now seen corresponding path program 1 times [2024-11-14 04:58:24,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:58:24,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123602139] [2024-11-14 04:58:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:24,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:58:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 04:58:24,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:58:24,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123602139] [2024-11-14 04:58:24,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123602139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:58:24,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371282824] [2024-11-14 04:58:24,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:24,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:24,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:58:24,643 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:58:24,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 04:58:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:24,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:58:24,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:58:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 04:58:24,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:58:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 04:58:24,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371282824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:58:24,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [99098285] [2024-11-14 04:58:24,900 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2024-11-14 04:58:24,900 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:58:24,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:58:24,901 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:58:24,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:58:26,177 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 04:58:26,250 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 158 for LOIs [2024-11-14 04:58:26,359 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:58:27,411 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:58:27,499 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:58:36,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [99098285] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:58:36,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:58:36,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [4, 4, 4] total 48 [2024-11-14 04:58:36,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942923471] [2024-11-14 04:58:36,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:58:36,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 04:58:36,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:58:36,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 04:58:36,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2068, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 04:58:36,206 INFO L87 Difference]: Start difference. First operand 455 states and 641 transitions. Second operand has 44 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 31 states have internal predecessors, (46), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 04:58:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:58:43,114 INFO L93 Difference]: Finished difference Result 611 states and 872 transitions. [2024-11-14 04:58:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-14 04:58:43,114 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 31 states have internal predecessors, (46), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 102 [2024-11-14 04:58:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:58:43,116 INFO L225 Difference]: With dead ends: 611 [2024-11-14 04:58:43,116 INFO L226 Difference]: Without dead ends: 498 [2024-11-14 04:58:43,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 258 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=264, Invalid=2928, Unknown=0, NotChecked=0, Total=3192 [2024-11-14 04:58:43,119 INFO L432 NwaCegarLoop]: 133 mSDtfsCounter, 173 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 3832 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 3875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:58:43,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 1405 Invalid, 3875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3832 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-11-14 04:58:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2024-11-14 04:58:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 345. [2024-11-14 04:58:43,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 251 states have (on average 1.3585657370517927) internal successors, (341), 258 states have internal predecessors, (341), 71 states have call successors, (71), 22 states have call predecessors, (71), 22 states have return successors, (71), 69 states have call predecessors, (71), 71 states have call successors, (71) [2024-11-14 04:58:43,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 483 transitions. [2024-11-14 04:58:43,203 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 483 transitions. Word has length 102 [2024-11-14 04:58:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:58:43,203 INFO L471 AbstractCegarLoop]: Abstraction has 345 states and 483 transitions. [2024-11-14 04:58:43,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 31 states have internal predecessors, (46), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 04:58:43,203 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 483 transitions. [2024-11-14 04:58:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 04:58:43,204 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:58:43,204 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:58:43,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 04:58:43,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:43,405 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:58:43,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:58:43,406 INFO L85 PathProgramCache]: Analyzing trace with hash -809886212, now seen corresponding path program 1 times [2024-11-14 04:58:43,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:58:43,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901780946] [2024-11-14 04:58:43,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:43,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:58:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-14 04:58:43,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:58:43,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901780946] [2024-11-14 04:58:43,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901780946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:58:43,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815731969] [2024-11-14 04:58:43,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:43,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:43,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:58:43,516 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:58:43,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 04:58:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:43,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:58:43,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:58:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 04:58:43,842 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:58:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-14 04:58:43,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815731969] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:58:43,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1364879939] [2024-11-14 04:58:43,976 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2024-11-14 04:58:43,978 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:58:43,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:58:43,979 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:58:43,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:58:45,675 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 04:58:45,738 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2024-11-14 04:58:45,742 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:58:46,972 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:58:47,039 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:58:53,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1364879939] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:58:53,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:58:53,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [4, 4, 4] total 49 [2024-11-14 04:58:53,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577370306] [2024-11-14 04:58:53,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:58:53,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 04:58:53,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:58:53,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 04:58:53,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2137, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 04:58:53,771 INFO L87 Difference]: Start difference. First operand 345 states and 483 transitions. Second operand has 45 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 32 states have internal predecessors, (46), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 04:59:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:04,284 INFO L93 Difference]: Finished difference Result 730 states and 1033 transitions. [2024-11-14 04:59:04,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-14 04:59:04,285 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 32 states have internal predecessors, (46), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 104 [2024-11-14 04:59:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:04,288 INFO L225 Difference]: With dead ends: 730 [2024-11-14 04:59:04,289 INFO L226 Difference]: Without dead ends: 617 [2024-11-14 04:59:04,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=339, Invalid=3567, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 04:59:04,291 INFO L432 NwaCegarLoop]: 239 mSDtfsCounter, 291 mSDsluCounter, 3693 mSDsCounter, 0 mSdLazyCounter, 7640 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 3932 SdHoareTripleChecker+Invalid, 7724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 7640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:04,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 3932 Invalid, 7724 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [84 Valid, 7640 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2024-11-14 04:59:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2024-11-14 04:59:04,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 546. [2024-11-14 04:59:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 393 states have (on average 1.366412213740458) internal successors, (537), 410 states have internal predecessors, (537), 113 states have call successors, (113), 38 states have call predecessors, (113), 39 states have return successors, (114), 105 states have call predecessors, (114), 113 states have call successors, (114) [2024-11-14 04:59:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 764 transitions. [2024-11-14 04:59:04,463 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 764 transitions. Word has length 104 [2024-11-14 04:59:04,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:04,464 INFO L471 AbstractCegarLoop]: Abstraction has 546 states and 764 transitions. [2024-11-14 04:59:04,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 32 states have internal predecessors, (46), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 04:59:04,464 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 764 transitions. [2024-11-14 04:59:04,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 04:59:04,466 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:04,466 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-14 04:59:04,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-14 04:59:04,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:04,668 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:04,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:04,668 INFO L85 PathProgramCache]: Analyzing trace with hash -876285876, now seen corresponding path program 1 times [2024-11-14 04:59:04,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:04,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604153855] [2024-11-14 04:59:04,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:04,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-14 04:59:04,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:04,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604153855] [2024-11-14 04:59:04,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604153855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:04,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124864895] [2024-11-14 04:59:04,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:04,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:04,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:04,764 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:04,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 04:59:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:04,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:59:04,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 04:59:04,998 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-14 04:59:05,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124864895] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:59:05,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [591455327] [2024-11-14 04:59:05,092 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2024-11-14 04:59:05,092 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:05,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:05,093 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:05,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:06,219 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 65 for LOIs [2024-11-14 04:59:06,335 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 54 for LOIs [2024-11-14 04:59:06,340 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:59:07,509 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:59:07,602 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:13,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [591455327] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:13,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:59:13,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [4, 4, 4] total 45 [2024-11-14 04:59:13,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522828462] [2024-11-14 04:59:13,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:13,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 04:59:13,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:13,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 04:59:13,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 04:59:13,795 INFO L87 Difference]: Start difference. First operand 546 states and 764 transitions. Second operand has 41 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 32 states have internal predecessors, (49), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 04:59:19,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:19,682 INFO L93 Difference]: Finished difference Result 831 states and 1177 transitions. [2024-11-14 04:59:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-14 04:59:19,683 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 32 states have internal predecessors, (49), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 103 [2024-11-14 04:59:19,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:19,687 INFO L225 Difference]: With dead ends: 831 [2024-11-14 04:59:19,687 INFO L226 Difference]: Without dead ends: 562 [2024-11-14 04:59:19,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=287, Invalid=2683, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 04:59:19,688 INFO L432 NwaCegarLoop]: 253 mSDtfsCounter, 316 mSDsluCounter, 2432 mSDsCounter, 0 mSdLazyCounter, 3608 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 3734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 3608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:19,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 2685 Invalid, 3734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 3608 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-14 04:59:19,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2024-11-14 04:59:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 538. [2024-11-14 04:59:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 387 states have (on average 1.3565891472868217) internal successors, (525), 402 states have internal predecessors, (525), 112 states have call successors, (112), 37 states have call predecessors, (112), 38 states have return successors, (113), 104 states have call predecessors, (113), 112 states have call successors, (113) [2024-11-14 04:59:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 750 transitions. [2024-11-14 04:59:19,867 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 750 transitions. Word has length 103 [2024-11-14 04:59:19,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:19,868 INFO L471 AbstractCegarLoop]: Abstraction has 538 states and 750 transitions. [2024-11-14 04:59:19,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 32 states have internal predecessors, (49), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 04:59:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 750 transitions. [2024-11-14 04:59:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-14 04:59:19,869 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:19,870 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:19,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 04:59:20,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:20,070 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:20,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:20,071 INFO L85 PathProgramCache]: Analyzing trace with hash -330926011, now seen corresponding path program 1 times [2024-11-14 04:59:20,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:20,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397301091] [2024-11-14 04:59:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:20,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 04:59:20,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:20,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397301091] [2024-11-14 04:59:20,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397301091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:20,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630371272] [2024-11-14 04:59:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:20,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:20,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:20,176 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:20,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 04:59:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:20,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:59:20,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 04:59:20,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 04:59:20,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630371272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:59:20,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663773097] [2024-11-14 04:59:20,485 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2024-11-14 04:59:20,485 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:20,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:20,485 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:20,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:22,097 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 04:59:22,174 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2024-11-14 04:59:22,178 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:59:23,169 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:59:23,233 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [663773097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:31,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:59:31,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [4, 4, 4] total 50 [2024-11-14 04:59:31,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610117396] [2024-11-14 04:59:31,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:31,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 04:59:31,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:31,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 04:59:31,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2229, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 04:59:31,389 INFO L87 Difference]: Start difference. First operand 538 states and 750 transitions. Second operand has 46 states, 38 states have (on average 1.236842105263158) internal successors, (47), 32 states have internal predecessors, (47), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 04:59:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:41,968 INFO L93 Difference]: Finished difference Result 744 states and 1042 transitions. [2024-11-14 04:59:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-14 04:59:41,969 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 38 states have (on average 1.236842105263158) internal successors, (47), 32 states have internal predecessors, (47), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 106 [2024-11-14 04:59:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:41,973 INFO L225 Difference]: With dead ends: 744 [2024-11-14 04:59:41,973 INFO L226 Difference]: Without dead ends: 631 [2024-11-14 04:59:41,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 268 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=346, Invalid=3686, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 04:59:41,975 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 176 mSDsluCounter, 1939 mSDsCounter, 0 mSdLazyCounter, 6424 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 6483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 6424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:41,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 2059 Invalid, 6483 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [59 Valid, 6424 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2024-11-14 04:59:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2024-11-14 04:59:42,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 565. [2024-11-14 04:59:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 411 states have (on average 1.364963503649635) internal successors, (561), 425 states have internal predecessors, (561), 112 states have call successors, (112), 40 states have call predecessors, (112), 41 states have return successors, (113), 106 states have call predecessors, (113), 112 states have call successors, (113) [2024-11-14 04:59:42,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 786 transitions. [2024-11-14 04:59:42,119 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 786 transitions. Word has length 106 [2024-11-14 04:59:42,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:42,119 INFO L471 AbstractCegarLoop]: Abstraction has 565 states and 786 transitions. [2024-11-14 04:59:42,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 38 states have (on average 1.236842105263158) internal successors, (47), 32 states have internal predecessors, (47), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 04:59:42,120 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 786 transitions. [2024-11-14 04:59:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-14 04:59:42,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:42,121 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:42,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 04:59:42,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-14 04:59:42,321 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:42,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:42,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1217374435, now seen corresponding path program 1 times [2024-11-14 04:59:42,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:42,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944939219] [2024-11-14 04:59:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:42,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 04:59:42,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:42,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944939219] [2024-11-14 04:59:42,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944939219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:42,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733344575] [2024-11-14 04:59:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:42,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:42,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:42,441 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:42,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 04:59:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:42,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:59:42,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 04:59:42,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 04:59:42,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733344575] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:59:42,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1365407260] [2024-11-14 04:59:42,735 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2024-11-14 04:59:42,735 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:42,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:42,735 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:42,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:44,128 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 65 for LOIs [2024-11-14 04:59:44,268 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2024-11-14 04:59:44,279 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 04:59:45,626 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 04:59:45,698 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:53,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1365407260] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:53,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:59:53,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [4, 4, 4] total 48 [2024-11-14 04:59:53,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830725849] [2024-11-14 04:59:53,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:53,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 04:59:53,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:53,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 04:59:53,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 04:59:53,237 INFO L87 Difference]: Start difference. First operand 565 states and 786 transitions. Second operand has 44 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 33 states have internal predecessors, (50), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 05:00:01,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:00:01,674 INFO L93 Difference]: Finished difference Result 781 states and 1114 transitions. [2024-11-14 05:00:01,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 05:00:01,675 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 33 states have internal predecessors, (50), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 105 [2024-11-14 05:00:01,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:00:01,679 INFO L225 Difference]: With dead ends: 781 [2024-11-14 05:00:01,679 INFO L226 Difference]: Without dead ends: 499 [2024-11-14 05:00:01,681 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 268 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=312, Invalid=2994, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 05:00:01,682 INFO L432 NwaCegarLoop]: 178 mSDtfsCounter, 156 mSDsluCounter, 2695 mSDsCounter, 0 mSdLazyCounter, 4734 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 2873 SdHoareTripleChecker+Invalid, 4798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 4734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:00:01,683 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 2873 Invalid, 4798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 4734 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-14 05:00:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-11-14 05:00:01,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 377. [2024-11-14 05:00:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 276 states have (on average 1.3514492753623188) internal successors, (373), 283 states have internal predecessors, (373), 75 states have call successors, (75), 25 states have call predecessors, (75), 25 states have return successors, (75), 72 states have call predecessors, (75), 75 states have call successors, (75) [2024-11-14 05:00:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 523 transitions. [2024-11-14 05:00:01,830 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 523 transitions. Word has length 105 [2024-11-14 05:00:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:00:01,830 INFO L471 AbstractCegarLoop]: Abstraction has 377 states and 523 transitions. [2024-11-14 05:00:01,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 33 states have internal predecessors, (50), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 05:00:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 523 transitions. [2024-11-14 05:00:01,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-14 05:00:01,832 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:00:01,832 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:00:01,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-14 05:00:02,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 05:00:02,033 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:00:02,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:00:02,033 INFO L85 PathProgramCache]: Analyzing trace with hash -63711823, now seen corresponding path program 1 times [2024-11-14 05:00:02,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:00:02,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732890347] [2024-11-14 05:00:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:02,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:00:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 05:00:02,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:00:02,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732890347] [2024-11-14 05:00:02,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732890347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:00:02,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946512245] [2024-11-14 05:00:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:02,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:00:02,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:00:02,139 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:00:02,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 05:00:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:02,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:00:02,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:00:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 05:00:02,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:00:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 05:00:02,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946512245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:00:02,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1214766098] [2024-11-14 05:00:02,430 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2024-11-14 05:00:02,430 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:00:02,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:00:02,430 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:00:02,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:00:03,892 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 05:00:03,985 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2024-11-14 05:00:04,051 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:00:05,103 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 05:00:05,172 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:00:13,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1214766098] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:00:13,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:00:13,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [4, 4, 4] total 49 [2024-11-14 05:00:13,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594902172] [2024-11-14 05:00:13,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:00:13,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 05:00:13,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:00:13,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 05:00:13,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2163, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 05:00:13,872 INFO L87 Difference]: Start difference. First operand 377 states and 523 transitions. Second operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 34 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 05:00:19,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:00:19,064 INFO L93 Difference]: Finished difference Result 561 states and 774 transitions. [2024-11-14 05:00:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 05:00:19,065 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.25) internal successors, (50), 34 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 107 [2024-11-14 05:00:19,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:00:19,068 INFO L225 Difference]: With dead ends: 561 [2024-11-14 05:00:19,068 INFO L226 Difference]: Without dead ends: 450 [2024-11-14 05:00:19,069 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 275 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=257, Invalid=2823, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 05:00:19,070 INFO L432 NwaCegarLoop]: 180 mSDtfsCounter, 67 mSDsluCounter, 2249 mSDsCounter, 0 mSdLazyCounter, 3184 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 2429 SdHoareTripleChecker+Invalid, 3215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:00:19,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 2429 Invalid, 3215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3184 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-14 05:00:19,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2024-11-14 05:00:19,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 427. [2024-11-14 05:00:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 312 states have (on average 1.3269230769230769) internal successors, (414), 320 states have internal predecessors, (414), 82 states have call successors, (82), 31 states have call predecessors, (82), 32 states have return successors, (83), 79 states have call predecessors, (83), 82 states have call successors, (83) [2024-11-14 05:00:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 579 transitions. [2024-11-14 05:00:19,167 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 579 transitions. Word has length 107 [2024-11-14 05:00:19,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:00:19,167 INFO L471 AbstractCegarLoop]: Abstraction has 427 states and 579 transitions. [2024-11-14 05:00:19,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.25) internal successors, (50), 34 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 05:00:19,168 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 579 transitions. [2024-11-14 05:00:19,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-14 05:00:19,168 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:00:19,169 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:00:19,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-14 05:00:19,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 05:00:19,369 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:00:19,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:00:19,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1685366219, now seen corresponding path program 1 times [2024-11-14 05:00:19,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:00:19,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005946323] [2024-11-14 05:00:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:19,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:00:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 05:00:19,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:00:19,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005946323] [2024-11-14 05:00:19,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005946323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:00:19,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268650866] [2024-11-14 05:00:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:19,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:00:19,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:00:19,483 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:00:19,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 05:00:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:19,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:00:19,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:00:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 05:00:19,695 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:00:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 05:00:19,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268650866] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:00:19,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1254823087] [2024-11-14 05:00:19,789 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2024-11-14 05:00:19,789 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:00:19,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:00:19,790 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:00:19,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:00:21,256 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 65 for LOIs [2024-11-14 05:00:21,354 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 105 for LOIs [2024-11-14 05:00:21,404 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:00:22,335 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 05:00:22,405 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:00:30,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1254823087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:00:30,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:00:30,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [4, 4, 4] total 48 [2024-11-14 05:00:30,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209696498] [2024-11-14 05:00:30,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:00:30,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 05:00:30,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:00:30,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 05:00:30,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2070, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 05:00:30,336 INFO L87 Difference]: Start difference. First operand 427 states and 579 transitions. Second operand has 44 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 33 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 05:00:36,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:00:36,321 INFO L93 Difference]: Finished difference Result 561 states and 773 transitions. [2024-11-14 05:00:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-14 05:00:36,321 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 33 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 107 [2024-11-14 05:00:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:00:36,323 INFO L225 Difference]: With dead ends: 561 [2024-11-14 05:00:36,323 INFO L226 Difference]: Without dead ends: 450 [2024-11-14 05:00:36,324 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=257, Invalid=2713, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 05:00:36,325 INFO L432 NwaCegarLoop]: 176 mSDtfsCounter, 49 mSDsluCounter, 2569 mSDsCounter, 0 mSdLazyCounter, 3624 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 2745 SdHoareTripleChecker+Invalid, 3641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 3624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:00:36,325 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 2745 Invalid, 3641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 3624 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-14 05:00:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2024-11-14 05:00:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 430. [2024-11-14 05:00:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 314 states have (on average 1.3248407643312101) internal successors, (416), 321 states have internal predecessors, (416), 82 states have call successors, (82), 32 states have call predecessors, (82), 33 states have return successors, (83), 80 states have call predecessors, (83), 82 states have call successors, (83) [2024-11-14 05:00:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 581 transitions. [2024-11-14 05:00:36,501 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 581 transitions. Word has length 107 [2024-11-14 05:00:36,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:00:36,502 INFO L471 AbstractCegarLoop]: Abstraction has 430 states and 581 transitions. [2024-11-14 05:00:36,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 33 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 05:00:36,502 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 581 transitions. [2024-11-14 05:00:36,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-14 05:00:36,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:00:36,504 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:00:36,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 05:00:36,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 05:00:36,705 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:00:36,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:00:36,705 INFO L85 PathProgramCache]: Analyzing trace with hash -967117469, now seen corresponding path program 1 times [2024-11-14 05:00:36,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:00:36,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213181936] [2024-11-14 05:00:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:36,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:00:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 05:00:36,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:00:36,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213181936] [2024-11-14 05:00:36,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213181936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:00:36,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985982207] [2024-11-14 05:00:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:36,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:00:36,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:00:36,815 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:00:36,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 05:00:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:37,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:00:37,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:00:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 05:00:37,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:00:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 05:00:37,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985982207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:00:37,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [209075190] [2024-11-14 05:00:37,185 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2024-11-14 05:00:37,185 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:00:37,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:00:37,186 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:00:37,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:00:38,465 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 05:00:38,565 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 119 for LOIs [2024-11-14 05:00:38,626 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:00:39,515 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 05:00:39,581 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:00:47,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [209075190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:00:47,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:00:47,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [4, 4, 4] total 49 [2024-11-14 05:00:47,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807506345] [2024-11-14 05:00:47,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:00:47,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 05:00:47,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:00:47,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 05:00:47,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2159, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 05:00:47,805 INFO L87 Difference]: Start difference. First operand 430 states and 581 transitions. Second operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 34 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 05:00:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:00:57,406 INFO L93 Difference]: Finished difference Result 692 states and 970 transitions. [2024-11-14 05:00:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-14 05:00:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.25) internal successors, (50), 34 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 107 [2024-11-14 05:00:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:00:57,409 INFO L225 Difference]: With dead ends: 692 [2024-11-14 05:00:57,409 INFO L226 Difference]: Without dead ends: 568 [2024-11-14 05:00:57,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 275 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=329, Invalid=3831, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 05:00:57,411 INFO L432 NwaCegarLoop]: 223 mSDtfsCounter, 234 mSDsluCounter, 3476 mSDsCounter, 0 mSdLazyCounter, 6129 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 3699 SdHoareTripleChecker+Invalid, 6227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 6129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:00:57,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 3699 Invalid, 6227 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [98 Valid, 6129 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2024-11-14 05:00:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2024-11-14 05:00:57,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 537. [2024-11-14 05:00:57,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 389 states have (on average 1.3316195372750643) internal successors, (518), 397 states have internal predecessors, (518), 108 states have call successors, (108), 38 states have call predecessors, (108), 39 states have return successors, (109), 105 states have call predecessors, (109), 108 states have call successors, (109) [2024-11-14 05:00:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 735 transitions. [2024-11-14 05:00:57,547 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 735 transitions. Word has length 107 [2024-11-14 05:00:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:00:57,547 INFO L471 AbstractCegarLoop]: Abstraction has 537 states and 735 transitions. [2024-11-14 05:00:57,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.25) internal successors, (50), 34 states have internal predecessors, (50), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 05:00:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 735 transitions. [2024-11-14 05:00:57,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 05:00:57,548 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:00:57,548 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:00:57,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-14 05:00:57,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:00:57,749 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:00:57,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:00:57,749 INFO L85 PathProgramCache]: Analyzing trace with hash 758278856, now seen corresponding path program 1 times [2024-11-14 05:00:57,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:00:57,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317867328] [2024-11-14 05:00:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:57,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:00:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-14 05:00:57,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:00:57,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317867328] [2024-11-14 05:00:57,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317867328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:00:57,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987813304] [2024-11-14 05:00:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:57,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:00:57,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:00:57,835 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:00:57,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 05:00:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:58,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:00:58,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:00:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 05:00:58,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:00:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-14 05:00:58,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987813304] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:00:58,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1092745289] [2024-11-14 05:00:58,106 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2024-11-14 05:00:58,106 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:00:58,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:00:58,107 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:00:58,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:00:59,697 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 05:00:59,797 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 128 for LOIs [2024-11-14 05:00:59,867 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:01:00,711 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 05:01:00,785 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:01:10,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1092745289] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:01:10,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:01:10,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [4, 4, 4] total 50 [2024-11-14 05:01:10,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400757250] [2024-11-14 05:01:10,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:01:10,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 05:01:10,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:01:10,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 05:01:10,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2256, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 05:01:10,402 INFO L87 Difference]: Start difference. First operand 537 states and 735 transitions. Second operand has 46 states, 40 states have (on average 1.275) internal successors, (51), 34 states have internal predecessors, (51), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 05:01:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:01:17,446 INFO L93 Difference]: Finished difference Result 688 states and 950 transitions. [2024-11-14 05:01:17,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 05:01:17,446 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 1.275) internal successors, (51), 34 states have internal predecessors, (51), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 109 [2024-11-14 05:01:17,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:01:17,450 INFO L225 Difference]: With dead ends: 688 [2024-11-14 05:01:17,450 INFO L226 Difference]: Without dead ends: 577 [2024-11-14 05:01:17,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 277 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=268, Invalid=3038, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 05:01:17,452 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 61 mSDsluCounter, 2487 mSDsCounter, 0 mSdLazyCounter, 3609 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2631 SdHoareTripleChecker+Invalid, 3644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:01:17,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 2631 Invalid, 3644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3609 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-11-14 05:01:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2024-11-14 05:01:17,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 541. [2024-11-14 05:01:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 390 states have (on average 1.3307692307692307) internal successors, (519), 400 states have internal predecessors, (519), 110 states have call successors, (110), 39 states have call predecessors, (110), 40 states have return successors, (111), 105 states have call predecessors, (111), 110 states have call successors, (111) [2024-11-14 05:01:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 740 transitions. [2024-11-14 05:01:17,609 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 740 transitions. Word has length 109 [2024-11-14 05:01:17,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:01:17,609 INFO L471 AbstractCegarLoop]: Abstraction has 541 states and 740 transitions. [2024-11-14 05:01:17,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 1.275) internal successors, (51), 34 states have internal predecessors, (51), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 05:01:17,609 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 740 transitions. [2024-11-14 05:01:17,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 05:01:17,610 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:01:17,611 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:01:17,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 05:01:17,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:01:17,811 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:01:17,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:01:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash -863375540, now seen corresponding path program 1 times [2024-11-14 05:01:17,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:01:17,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861312540] [2024-11-14 05:01:17,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:01:17,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:01:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:01:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-14 05:01:17,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:01:17,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861312540] [2024-11-14 05:01:17,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861312540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:01:17,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108879766] [2024-11-14 05:01:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:01:17,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:01:17,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:01:17,901 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:01:17,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 05:01:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:01:18,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:01:18,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:01:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 05:01:18,103 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:01:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-14 05:01:18,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108879766] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:01:18,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1413414052] [2024-11-14 05:01:18,198 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2024-11-14 05:01:18,199 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:01:18,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:01:18,199 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:01:18,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:01:19,657 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 65 for LOIs [2024-11-14 05:01:19,751 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 142 for LOIs [2024-11-14 05:01:19,812 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:01:20,852 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 05:01:20,926 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:01:30,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1413414052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:01:30,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:01:30,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [4, 4, 4] total 50 [2024-11-14 05:01:30,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718320895] [2024-11-14 05:01:30,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:01:30,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 05:01:30,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:01:30,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 05:01:30,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2250, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 05:01:30,175 INFO L87 Difference]: Start difference. First operand 541 states and 740 transitions. Second operand has 46 states, 40 states have (on average 1.275) internal successors, (51), 34 states have internal predecessors, (51), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 05:01:37,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:01:37,027 INFO L93 Difference]: Finished difference Result 676 states and 934 transitions. [2024-11-14 05:01:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-14 05:01:37,028 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 1.275) internal successors, (51), 34 states have internal predecessors, (51), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 109 [2024-11-14 05:01:37,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:01:37,031 INFO L225 Difference]: With dead ends: 676 [2024-11-14 05:01:37,031 INFO L226 Difference]: Without dead ends: 565 [2024-11-14 05:01:37,032 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 278 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=278, Invalid=3028, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 05:01:37,033 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 42 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 3119 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 3138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:01:37,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 2096 Invalid, 3138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3119 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-14 05:01:37,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2024-11-14 05:01:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 537. [2024-11-14 05:01:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 389 states have (on average 1.3316195372750643) internal successors, (518), 397 states have internal predecessors, (518), 108 states have call successors, (108), 38 states have call predecessors, (108), 39 states have return successors, (109), 105 states have call predecessors, (109), 108 states have call successors, (109) [2024-11-14 05:01:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 735 transitions. [2024-11-14 05:01:37,229 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 735 transitions. Word has length 109 [2024-11-14 05:01:37,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:01:37,230 INFO L471 AbstractCegarLoop]: Abstraction has 537 states and 735 transitions. [2024-11-14 05:01:37,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 1.275) internal successors, (51), 34 states have internal predecessors, (51), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 05:01:37,230 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 735 transitions. [2024-11-14 05:01:37,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 05:01:37,231 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:01:37,231 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:01:37,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-14 05:01:37,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:01:37,432 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:01:37,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:01:37,432 INFO L85 PathProgramCache]: Analyzing trace with hash -145126790, now seen corresponding path program 1 times [2024-11-14 05:01:37,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:01:37,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72271057] [2024-11-14 05:01:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:01:37,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:01:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:01:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-14 05:01:37,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:01:37,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72271057] [2024-11-14 05:01:37,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72271057] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:01:37,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233482345] [2024-11-14 05:01:37,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:01:37,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:01:37,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:01:37,510 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:01:37,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 05:01:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:01:37,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:01:37,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:01:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 05:01:37,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:01:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-14 05:01:37,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233482345] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:01:37,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [856481950] [2024-11-14 05:01:37,816 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2024-11-14 05:01:37,817 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:01:37,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:01:37,817 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:01:37,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:01:39,312 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 05:01:39,417 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 158 for LOIs [2024-11-14 05:01:39,494 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:01:40,591 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 05:01:40,671 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:01:50,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [856481950] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:01:50,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:01:50,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [4, 4, 4] total 50 [2024-11-14 05:01:50,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577551821] [2024-11-14 05:01:50,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:01:50,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 05:01:50,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:01:50,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 05:01:50,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2253, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 05:01:50,464 INFO L87 Difference]: Start difference. First operand 537 states and 735 transitions. Second operand has 46 states, 40 states have (on average 1.275) internal successors, (51), 34 states have internal predecessors, (51), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 05:02:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:02:00,488 INFO L93 Difference]: Finished difference Result 689 states and 961 transitions. [2024-11-14 05:02:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-14 05:02:00,489 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 1.275) internal successors, (51), 34 states have internal predecessors, (51), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 109 [2024-11-14 05:02:00,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:02:00,491 INFO L225 Difference]: With dead ends: 689 [2024-11-14 05:02:00,492 INFO L226 Difference]: Without dead ends: 565 [2024-11-14 05:02:00,493 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 277 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=338, Invalid=4084, Unknown=0, NotChecked=0, Total=4422 [2024-11-14 05:02:00,493 INFO L432 NwaCegarLoop]: 193 mSDtfsCounter, 233 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 3567 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 3668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:02:00,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1552 Invalid, 3668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3567 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-14 05:02:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2024-11-14 05:02:00,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 398. [2024-11-14 05:02:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 289 states have (on average 1.3217993079584776) internal successors, (382), 295 states have internal predecessors, (382), 79 states have call successors, (79), 29 states have call predecessors, (79), 29 states have return successors, (79), 76 states have call predecessors, (79), 79 states have call successors, (79) [2024-11-14 05:02:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 540 transitions. [2024-11-14 05:02:00,622 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 540 transitions. Word has length 109 [2024-11-14 05:02:00,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:02:00,622 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 540 transitions. [2024-11-14 05:02:00,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 1.275) internal successors, (51), 34 states have internal predecessors, (51), 9 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-14 05:02:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 540 transitions. [2024-11-14 05:02:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-14 05:02:00,623 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:02:00,623 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-14 05:02:00,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 05:02:00,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:02:00,824 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:02:00,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:02:00,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2054224614, now seen corresponding path program 1 times [2024-11-14 05:02:00,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:02:00,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526986767] [2024-11-14 05:02:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:02:00,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:02:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:02:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-14 05:02:00,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:02:00,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526986767] [2024-11-14 05:02:00,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526986767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:02:00,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259668068] [2024-11-14 05:02:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:02:00,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:02:00,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:02:00,947 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:02:00,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 05:02:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:02:01,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:02:01,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:02:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-14 05:02:01,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:02:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-14 05:02:01,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259668068] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:02:01,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101872459] [2024-11-14 05:02:01,313 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2024-11-14 05:02:01,313 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:02:01,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:02:01,314 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:02:01,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:02:03,054 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 05:02:03,221 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 05:02:03,222 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:02:04,216 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 05:02:04,301 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:02:13,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1101872459] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:02:13,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:02:13,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [4, 4, 4] total 50 [2024-11-14 05:02:13,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566366379] [2024-11-14 05:02:13,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:02:13,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 05:02:13,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:02:13,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 05:02:13,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2263, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 05:02:13,178 INFO L87 Difference]: Start difference. First operand 398 states and 540 transitions. Second operand has 46 states, 40 states have (on average 1.275) internal successors, (51), 35 states have internal predecessors, (51), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:02:19,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:02:19,577 INFO L93 Difference]: Finished difference Result 579 states and 791 transitions. [2024-11-14 05:02:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-14 05:02:19,578 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 1.275) internal successors, (51), 35 states have internal predecessors, (51), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 111 [2024-11-14 05:02:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:02:19,582 INFO L225 Difference]: With dead ends: 579 [2024-11-14 05:02:19,582 INFO L226 Difference]: Without dead ends: 468 [2024-11-14 05:02:19,583 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=260, Invalid=3046, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 05:02:19,584 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 68 mSDsluCounter, 2382 mSDsCounter, 0 mSdLazyCounter, 3566 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 2557 SdHoareTripleChecker+Invalid, 3594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:02:19,584 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 2557 Invalid, 3594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3566 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-14 05:02:19,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2024-11-14 05:02:19,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 431. [2024-11-14 05:02:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 312 states have (on average 1.310897435897436) internal successors, (409), 319 states have internal predecessors, (409), 85 states have call successors, (85), 32 states have call predecessors, (85), 33 states have return successors, (86), 82 states have call predecessors, (86), 85 states have call successors, (86) [2024-11-14 05:02:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 580 transitions. [2024-11-14 05:02:19,738 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 580 transitions. Word has length 111 [2024-11-14 05:02:19,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:02:19,738 INFO L471 AbstractCegarLoop]: Abstraction has 431 states and 580 transitions. [2024-11-14 05:02:19,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 1.275) internal successors, (51), 35 states have internal predecessors, (51), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:02:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 580 transitions. [2024-11-14 05:02:19,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-14 05:02:19,740 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:02:19,740 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-14 05:02:19,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-14 05:02:19,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-14 05:02:19,941 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:02:19,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:02:19,941 INFO L85 PathProgramCache]: Analyzing trace with hash 58947400, now seen corresponding path program 1 times [2024-11-14 05:02:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:02:19,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499400325] [2024-11-14 05:02:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:02:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:02:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:02:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-14 05:02:20,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:02:20,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499400325] [2024-11-14 05:02:20,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499400325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:02:20,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202430645] [2024-11-14 05:02:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:02:20,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:02:20,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:02:20,054 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:02:20,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 05:02:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:02:20,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:02:20,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:02:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-14 05:02:20,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:02:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-14 05:02:20,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202430645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:02:20,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [970897585] [2024-11-14 05:02:20,408 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2024-11-14 05:02:20,408 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:02:20,408 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:02:20,408 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:02:20,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:02:22,288 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 05:02:22,392 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2024-11-14 05:02:22,397 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:02:23,397 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 05:02:23,481 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:02:31,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [970897585] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:02:31,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:02:31,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [4, 4, 4] total 51 [2024-11-14 05:02:31,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372925081] [2024-11-14 05:02:31,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:02:31,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-14 05:02:31,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:02:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-14 05:02:31,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2326, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 05:02:31,845 INFO L87 Difference]: Start difference. First operand 431 states and 580 transitions. Second operand has 47 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 35 states have internal predecessors, (51), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:02:38,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:02:38,043 INFO L93 Difference]: Finished difference Result 621 states and 839 transitions. [2024-11-14 05:02:38,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-14 05:02:38,043 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 35 states have internal predecessors, (51), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 111 [2024-11-14 05:02:38,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:02:38,048 INFO L225 Difference]: With dead ends: 621 [2024-11-14 05:02:38,048 INFO L226 Difference]: Without dead ends: 510 [2024-11-14 05:02:38,049 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=322, Invalid=3460, Unknown=0, NotChecked=0, Total=3782 [2024-11-14 05:02:38,050 INFO L432 NwaCegarLoop]: 176 mSDtfsCounter, 91 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 3213 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:02:38,050 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1685 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3213 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-14 05:02:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2024-11-14 05:02:38,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 442. [2024-11-14 05:02:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 319 states have (on average 1.3072100313479624) internal successors, (417), 327 states have internal predecessors, (417), 88 states have call successors, (88), 33 states have call predecessors, (88), 34 states have return successors, (89), 84 states have call predecessors, (89), 88 states have call successors, (89) [2024-11-14 05:02:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 594 transitions. [2024-11-14 05:02:38,274 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 594 transitions. Word has length 111 [2024-11-14 05:02:38,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:02:38,274 INFO L471 AbstractCegarLoop]: Abstraction has 442 states and 594 transitions. [2024-11-14 05:02:38,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 35 states have internal predecessors, (51), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:02:38,275 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 594 transitions. [2024-11-14 05:02:38,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-14 05:02:38,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:02:38,276 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-14 05:02:38,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 05:02:38,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-14 05:02:38,478 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:02:38,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:02:38,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1562706996, now seen corresponding path program 1 times [2024-11-14 05:02:38,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:02:38,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251883941] [2024-11-14 05:02:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:02:38,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:02:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:02:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-14 05:02:38,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:02:38,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251883941] [2024-11-14 05:02:38,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251883941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:02:38,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52780660] [2024-11-14 05:02:38,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:02:38,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:02:38,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:02:38,609 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:02:38,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 05:02:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:02:38,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:02:38,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:02:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-14 05:02:38,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:02:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-14 05:02:39,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52780660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:02:39,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1810959872] [2024-11-14 05:02:39,026 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2024-11-14 05:02:39,027 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:02:39,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:02:39,028 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:02:39,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:02:40,866 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 05:02:40,982 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2024-11-14 05:02:40,988 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:02:42,256 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 05:02:42,345 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:02:51,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1810959872] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:02:51,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:02:51,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [4, 4, 4] total 51 [2024-11-14 05:02:51,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502069732] [2024-11-14 05:02:51,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:02:51,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-14 05:02:51,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:02:51,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-14 05:02:51,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2317, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 05:02:51,010 INFO L87 Difference]: Start difference. First operand 442 states and 594 transitions. Second operand has 47 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 35 states have internal predecessors, (51), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:02:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:02:59,647 INFO L93 Difference]: Finished difference Result 614 states and 830 transitions. [2024-11-14 05:02:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-14 05:02:59,648 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 35 states have internal predecessors, (51), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 111 [2024-11-14 05:02:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:02:59,657 INFO L225 Difference]: With dead ends: 614 [2024-11-14 05:02:59,661 INFO L226 Difference]: Without dead ends: 503 [2024-11-14 05:02:59,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=329, Invalid=3331, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 05:02:59,663 INFO L432 NwaCegarLoop]: 172 mSDtfsCounter, 122 mSDsluCounter, 1910 mSDsCounter, 0 mSdLazyCounter, 4865 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 4913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 4865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:02:59,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 2082 Invalid, 4913 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [48 Valid, 4865 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-14 05:02:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2024-11-14 05:02:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 452. [2024-11-14 05:02:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 326 states have (on average 1.303680981595092) internal successors, (425), 335 states have internal predecessors, (425), 90 states have call successors, (90), 34 states have call predecessors, (90), 35 states have return successors, (91), 85 states have call predecessors, (91), 90 states have call successors, (91) [2024-11-14 05:02:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 606 transitions. [2024-11-14 05:02:59,860 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 606 transitions. Word has length 111 [2024-11-14 05:02:59,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:02:59,861 INFO L471 AbstractCegarLoop]: Abstraction has 452 states and 606 transitions. [2024-11-14 05:02:59,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 35 states have internal predecessors, (51), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:02:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 606 transitions. [2024-11-14 05:02:59,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-14 05:02:59,862 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:02:59,863 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:02:59,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-14 05:03:00,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-14 05:03:00,063 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:03:00,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:03:00,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1014970033, now seen corresponding path program 1 times [2024-11-14 05:03:00,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:03:00,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731330171] [2024-11-14 05:03:00,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:03:00,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:03:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:03:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-14 05:03:00,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:03:00,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731330171] [2024-11-14 05:03:00,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731330171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:03:00,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091583587] [2024-11-14 05:03:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:03:00,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:03:00,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:03:00,158 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:03:00,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 05:03:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:03:00,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:03:00,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:03:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 05:03:00,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:03:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-14 05:03:00,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091583587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:03:00,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752893188] [2024-11-14 05:03:00,472 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2024-11-14 05:03:00,473 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:03:00,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:03:00,473 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:03:00,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:03:02,416 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 05:03:02,532 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 05:03:02,533 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:03:03,797 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 05:03:03,886 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:03:13,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [752893188] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:03:13,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:03:13,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [4, 4, 4] total 51 [2024-11-14 05:03:13,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872868221] [2024-11-14 05:03:13,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:03:13,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-14 05:03:13,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:03:13,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-14 05:03:13,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2360, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 05:03:13,914 INFO L87 Difference]: Start difference. First operand 452 states and 606 transitions. Second operand has 47 states, 40 states have (on average 1.3) internal successors, (52), 35 states have internal predecessors, (52), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:03:22,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:03:22,152 INFO L93 Difference]: Finished difference Result 599 states and 815 transitions. [2024-11-14 05:03:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 05:03:22,152 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 40 states have (on average 1.3) internal successors, (52), 35 states have internal predecessors, (52), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 113 [2024-11-14 05:03:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:03:22,155 INFO L225 Difference]: With dead ends: 599 [2024-11-14 05:03:22,155 INFO L226 Difference]: Without dead ends: 488 [2024-11-14 05:03:22,156 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 288 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=262, Invalid=3160, Unknown=0, NotChecked=0, Total=3422 [2024-11-14 05:03:22,156 INFO L432 NwaCegarLoop]: 143 mSDtfsCounter, 57 mSDsluCounter, 3119 mSDsCounter, 0 mSdLazyCounter, 4382 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 3262 SdHoareTripleChecker+Invalid, 4412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 4382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:03:22,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 3262 Invalid, 4412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 4382 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2024-11-14 05:03:22,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2024-11-14 05:03:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 450. [2024-11-14 05:03:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 325 states have (on average 1.3015384615384615) internal successors, (423), 334 states have internal predecessors, (423), 89 states have call successors, (89), 34 states have call predecessors, (89), 35 states have return successors, (90), 84 states have call predecessors, (90), 89 states have call successors, (90) [2024-11-14 05:03:22,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 602 transitions. [2024-11-14 05:03:22,323 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 602 transitions. Word has length 113 [2024-11-14 05:03:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:03:22,323 INFO L471 AbstractCegarLoop]: Abstraction has 450 states and 602 transitions. [2024-11-14 05:03:22,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 40 states have (on average 1.3) internal successors, (52), 35 states have internal predecessors, (52), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:03:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 602 transitions. [2024-11-14 05:03:22,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-14 05:03:22,325 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:03:22,325 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:03:22,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-14 05:03:22,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 05:03:22,526 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:03:22,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:03:22,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1166825249, now seen corresponding path program 1 times [2024-11-14 05:03:22,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:03:22,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287399927] [2024-11-14 05:03:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:03:22,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:03:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:03:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-14 05:03:22,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:03:22,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287399927] [2024-11-14 05:03:22,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287399927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:03:22,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060874534] [2024-11-14 05:03:22,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:03:22,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:03:22,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:03:22,633 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:03:22,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-14 05:03:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:03:22,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:03:22,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:03:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 05:03:22,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:03:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-14 05:03:23,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060874534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:03:23,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130504662] [2024-11-14 05:03:23,004 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2024-11-14 05:03:23,004 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:03:23,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:03:23,004 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:03:23,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:03:24,861 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 05:03:24,952 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2024-11-14 05:03:24,956 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:03:26,079 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 05:03:26,153 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:03:35,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1130504662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:03:35,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:03:35,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [4, 4, 4] total 52 [2024-11-14 05:03:35,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051038300] [2024-11-14 05:03:35,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:03:35,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-14 05:03:35,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:03:35,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-14 05:03:35,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2424, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 05:03:35,591 INFO L87 Difference]: Start difference. First operand 450 states and 602 transitions. Second operand has 48 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 35 states have internal predecessors, (52), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:03:43,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:03:43,690 INFO L93 Difference]: Finished difference Result 591 states and 806 transitions. [2024-11-14 05:03:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-14 05:03:43,691 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 35 states have internal predecessors, (52), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 113 [2024-11-14 05:03:43,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:03:43,694 INFO L225 Difference]: With dead ends: 591 [2024-11-14 05:03:43,694 INFO L226 Difference]: Without dead ends: 480 [2024-11-14 05:03:43,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 287 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=325, Invalid=3581, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 05:03:43,695 INFO L432 NwaCegarLoop]: 151 mSDtfsCounter, 73 mSDsluCounter, 2064 mSDsCounter, 0 mSdLazyCounter, 3982 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 4026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:03:43,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 2215 Invalid, 4026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3982 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-11-14 05:03:43,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2024-11-14 05:03:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 440. [2024-11-14 05:03:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 318 states have (on average 1.3081761006289307) internal successors, (416), 326 states have internal predecessors, (416), 87 states have call successors, (87), 33 states have call predecessors, (87), 34 states have return successors, (88), 83 states have call predecessors, (88), 87 states have call successors, (88) [2024-11-14 05:03:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 591 transitions. [2024-11-14 05:03:43,878 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 591 transitions. Word has length 113 [2024-11-14 05:03:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:03:43,879 INFO L471 AbstractCegarLoop]: Abstraction has 440 states and 591 transitions. [2024-11-14 05:03:43,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 35 states have internal predecessors, (52), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:03:43,879 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 591 transitions. [2024-11-14 05:03:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-14 05:03:43,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:03:43,880 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:03:43,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-14 05:03:44,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-14 05:03:44,082 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:03:44,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:03:44,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1506487651, now seen corresponding path program 1 times [2024-11-14 05:03:44,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:03:44,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386556201] [2024-11-14 05:03:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:03:44,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:03:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:03:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-14 05:03:44,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:03:44,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386556201] [2024-11-14 05:03:44,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386556201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:03:44,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500194224] [2024-11-14 05:03:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:03:44,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:03:44,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:03:44,184 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:03:44,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-14 05:03:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:03:44,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:03:44,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:03:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 05:03:44,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:03:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-14 05:03:44,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500194224] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:03:44,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443721946] [2024-11-14 05:03:44,495 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2024-11-14 05:03:44,495 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:03:44,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:03:44,495 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:03:44,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:03:46,131 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 05:03:46,247 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2024-11-14 05:03:46,252 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:03:47,651 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 05:03:47,737 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:03:57,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1443721946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:03:57,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:03:57,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [4, 4, 4] total 52 [2024-11-14 05:03:57,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770908059] [2024-11-14 05:03:57,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:03:57,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-14 05:03:57,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:03:57,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-14 05:03:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2414, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 05:03:57,782 INFO L87 Difference]: Start difference. First operand 440 states and 591 transitions. Second operand has 48 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 35 states have internal predecessors, (52), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:04:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:04:07,267 INFO L93 Difference]: Finished difference Result 576 states and 787 transitions. [2024-11-14 05:04:07,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-14 05:04:07,267 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 35 states have internal predecessors, (52), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 113 [2024-11-14 05:04:07,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:04:07,270 INFO L225 Difference]: With dead ends: 576 [2024-11-14 05:04:07,270 INFO L226 Difference]: Without dead ends: 465 [2024-11-14 05:04:07,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 287 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=334, Invalid=3448, Unknown=0, NotChecked=0, Total=3782 [2024-11-14 05:04:07,272 INFO L432 NwaCegarLoop]: 147 mSDtfsCounter, 59 mSDsluCounter, 2262 mSDsCounter, 0 mSdLazyCounter, 4191 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2409 SdHoareTripleChecker+Invalid, 4224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 4191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:04:07,272 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 2409 Invalid, 4224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 4191 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2024-11-14 05:04:07,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2024-11-14 05:04:07,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 400. [2024-11-14 05:04:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 290 states have (on average 1.3241379310344827) internal successors, (384), 296 states have internal predecessors, (384), 80 states have call successors, (80), 29 states have call predecessors, (80), 29 states have return successors, (80), 77 states have call predecessors, (80), 80 states have call successors, (80) [2024-11-14 05:04:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 544 transitions. [2024-11-14 05:04:07,407 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 544 transitions. Word has length 113 [2024-11-14 05:04:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:04:07,408 INFO L471 AbstractCegarLoop]: Abstraction has 400 states and 544 transitions. [2024-11-14 05:04:07,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 35 states have internal predecessors, (52), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:04:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 544 transitions. [2024-11-14 05:04:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-14 05:04:07,409 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:04:07,410 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-14 05:04:07,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-14 05:04:07,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 05:04:07,611 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:04:07,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:04:07,611 INFO L85 PathProgramCache]: Analyzing trace with hash 846594865, now seen corresponding path program 1 times [2024-11-14 05:04:07,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:04:07,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950230968] [2024-11-14 05:04:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:07,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:04:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-11-14 05:04:07,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:04:07,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950230968] [2024-11-14 05:04:07,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950230968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:04:07,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377226196] [2024-11-14 05:04:07,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:07,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:07,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:04:07,772 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:04:07,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-14 05:04:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:08,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:04:08,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:04:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 05:04:08,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:04:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-11-14 05:04:08,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377226196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:04:08,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [93800893] [2024-11-14 05:04:08,195 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-14 05:04:08,195 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:04:08,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:04:08,195 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:04:08,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:04:09,905 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 05:04:09,991 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-14 05:04:10,003 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:04:10,851 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 05:04:10,922 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:04:20,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [93800893] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:04:20,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:04:20,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [4, 4, 4] total 53 [2024-11-14 05:04:20,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730991332] [2024-11-14 05:04:20,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:04:20,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 05:04:20,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:04:20,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 05:04:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2550, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 05:04:20,580 INFO L87 Difference]: Start difference. First operand 400 states and 544 transitions. Second operand has 49 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 36 states have internal predecessors, (52), 11 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:04:29,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:04:29,367 INFO L93 Difference]: Finished difference Result 622 states and 836 transitions. [2024-11-14 05:04:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-14 05:04:29,368 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 36 states have internal predecessors, (52), 11 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) Word has length 115 [2024-11-14 05:04:29,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:04:29,371 INFO L225 Difference]: With dead ends: 622 [2024-11-14 05:04:29,372 INFO L226 Difference]: Without dead ends: 511 [2024-11-14 05:04:29,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=278, Invalid=3382, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 05:04:29,373 INFO L432 NwaCegarLoop]: 180 mSDtfsCounter, 74 mSDsluCounter, 2228 mSDsCounter, 0 mSdLazyCounter, 4624 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 4663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:04:29,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 2408 Invalid, 4663 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [39 Valid, 4624 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2024-11-14 05:04:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2024-11-14 05:04:29,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 457. [2024-11-14 05:04:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 329 states have (on average 1.3009118541033435) internal successors, (428), 337 states have internal predecessors, (428), 89 states have call successors, (89), 37 states have call predecessors, (89), 38 states have return successors, (90), 85 states have call predecessors, (90), 89 states have call successors, (90) [2024-11-14 05:04:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 607 transitions. [2024-11-14 05:04:29,636 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 607 transitions. Word has length 115 [2024-11-14 05:04:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:04:29,637 INFO L471 AbstractCegarLoop]: Abstraction has 457 states and 607 transitions. [2024-11-14 05:04:29,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 36 states have internal predecessors, (52), 11 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:04:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 607 transitions. [2024-11-14 05:04:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-14 05:04:29,639 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:04:29,639 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:04:29,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-14 05:04:29,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:29,840 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:04:29,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:04:29,840 INFO L85 PathProgramCache]: Analyzing trace with hash 211713108, now seen corresponding path program 1 times [2024-11-14 05:04:29,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:04:29,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890190017] [2024-11-14 05:04:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:29,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:04:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-14 05:04:29,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:04:29,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890190017] [2024-11-14 05:04:29,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890190017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:04:29,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533682553] [2024-11-14 05:04:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:29,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:29,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:04:29,921 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:04:29,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-14 05:04:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:30,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:04:30,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:04:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-14 05:04:30,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:04:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-14 05:04:30,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533682553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:04:30,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [428551318] [2024-11-14 05:04:30,298 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2024-11-14 05:04:30,298 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:04:30,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:04:30,298 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:04:30,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:04:31,950 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 65 for LOIs [2024-11-14 05:04:32,072 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2024-11-14 05:04:32,144 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:04:33,418 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 79 for LOIs [2024-11-14 05:04:33,538 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 91 for LOIs [2024-11-14 05:04:33,560 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:04:43,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [428551318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:04:43,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:04:43,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [4, 4, 4] total 53 [2024-11-14 05:04:43,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535239354] [2024-11-14 05:04:43,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:04:43,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 05:04:43,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:04:43,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 05:04:43,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2542, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 05:04:43,320 INFO L87 Difference]: Start difference. First operand 457 states and 607 transitions. Second operand has 49 states, 43 states have (on average 1.255813953488372) internal successors, (54), 37 states have internal predecessors, (54), 10 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:04:50,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:04:50,595 INFO L93 Difference]: Finished difference Result 692 states and 950 transitions. [2024-11-14 05:04:50,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-14 05:04:50,596 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 43 states have (on average 1.255813953488372) internal successors, (54), 37 states have internal predecessors, (54), 10 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 117 [2024-11-14 05:04:50,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:04:50,600 INFO L225 Difference]: With dead ends: 692 [2024-11-14 05:04:50,601 INFO L226 Difference]: Without dead ends: 482 [2024-11-14 05:04:50,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 300 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=334, Invalid=3956, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 05:04:50,603 INFO L432 NwaCegarLoop]: 179 mSDtfsCounter, 82 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 3190 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 3215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:04:50,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 2010 Invalid, 3215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3190 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-14 05:04:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2024-11-14 05:04:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 467. [2024-11-14 05:04:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 337 states have (on average 1.2967359050445104) internal successors, (437), 344 states have internal predecessors, (437), 90 states have call successors, (90), 38 states have call predecessors, (90), 39 states have return successors, (91), 87 states have call predecessors, (91), 90 states have call successors, (91) [2024-11-14 05:04:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 618 transitions. [2024-11-14 05:04:50,815 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 618 transitions. Word has length 117 [2024-11-14 05:04:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:04:50,815 INFO L471 AbstractCegarLoop]: Abstraction has 467 states and 618 transitions. [2024-11-14 05:04:50,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 43 states have (on average 1.255813953488372) internal successors, (54), 37 states have internal predecessors, (54), 10 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:04:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 618 transitions. [2024-11-14 05:04:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-14 05:04:50,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:04:50,817 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:04:50,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-14 05:04:51,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:51,018 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:04:51,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:04:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1405775544, now seen corresponding path program 1 times [2024-11-14 05:04:51,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:04:51,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326491052] [2024-11-14 05:04:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:51,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:04:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-14 05:04:51,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:04:51,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326491052] [2024-11-14 05:04:51,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326491052] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:04:51,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358037214] [2024-11-14 05:04:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:51,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:51,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:04:51,109 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:04:51,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-14 05:04:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:51,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:04:51,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:04:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-14 05:04:51,419 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:04:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-14 05:04:51,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358037214] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:04:51,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1324625260] [2024-11-14 05:04:51,513 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-14 05:04:51,513 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:04:51,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:04:51,513 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:04:51,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:04:53,702 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 59 for LOIs [2024-11-14 05:04:53,806 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2024-11-14 05:04:53,842 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:04:54,926 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 59 for LOIs [2024-11-14 05:04:55,012 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:05:06,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1324625260] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:05:06,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:05:06,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [4, 4, 4] total 54 [2024-11-14 05:05:06,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283751824] [2024-11-14 05:05:06,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:05:06,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 05:05:06,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:05:06,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 05:05:06,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2652, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 05:05:06,120 INFO L87 Difference]: Start difference. First operand 467 states and 618 transitions. Second operand has 50 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 36 states have internal predecessors, (53), 11 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:05:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:05:13,988 INFO L93 Difference]: Finished difference Result 613 states and 826 transitions. [2024-11-14 05:05:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-14 05:05:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 36 states have internal predecessors, (53), 11 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) Word has length 117 [2024-11-14 05:05:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:05:13,991 INFO L225 Difference]: With dead ends: 613 [2024-11-14 05:05:13,992 INFO L226 Difference]: Without dead ends: 502 [2024-11-14 05:05:13,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 297 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=287, Invalid=3619, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 05:05:13,993 INFO L432 NwaCegarLoop]: 151 mSDtfsCounter, 60 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 3707 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 2101 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:05:13,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 2101 Invalid, 3741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3707 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-11-14 05:05:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2024-11-14 05:05:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 422. [2024-11-14 05:05:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 306 states have (on average 1.3169934640522876) internal successors, (403), 311 states have internal predecessors, (403), 82 states have call successors, (82), 32 states have call predecessors, (82), 33 states have return successors, (83), 81 states have call predecessors, (83), 82 states have call successors, (83) [2024-11-14 05:05:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 568 transitions. [2024-11-14 05:05:14,115 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 568 transitions. Word has length 117 [2024-11-14 05:05:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:05:14,115 INFO L471 AbstractCegarLoop]: Abstraction has 422 states and 568 transitions. [2024-11-14 05:05:14,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 36 states have internal predecessors, (53), 11 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:05:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 568 transitions. [2024-11-14 05:05:14,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-14 05:05:14,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:05:14,117 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:05:14,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-14 05:05:14,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:05:14,318 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:05:14,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:05:14,318 INFO L85 PathProgramCache]: Analyzing trace with hash 347267243, now seen corresponding path program 1 times [2024-11-14 05:05:14,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:05:14,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218246121] [2024-11-14 05:05:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:05:14,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:05:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:05:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 05:05:14,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:05:14,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218246121] [2024-11-14 05:05:14,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218246121] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:05:14,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518996613] [2024-11-14 05:05:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:05:14,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:05:14,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:05:14,451 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:05:14,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-14 05:05:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:05:14,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:05:14,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:05:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-14 05:05:14,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:05:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-14 05:05:14,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518996613] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:05:14,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1316386190] [2024-11-14 05:05:14,773 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2024-11-14 05:05:14,773 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:05:14,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:05:14,774 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:05:14,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:05:16,485 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 65 for LOIs [2024-11-14 05:05:16,606 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2024-11-14 05:05:16,685 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:05:17,759 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 79 for LOIs [2024-11-14 05:05:17,856 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 91 for LOIs [2024-11-14 05:05:17,873 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:05:31,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1316386190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:05:31,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:05:31,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [4, 4, 4] total 55 [2024-11-14 05:05:31,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645157368] [2024-11-14 05:05:31,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:05:31,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-14 05:05:31,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:05:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-14 05:05:31,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2735, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 05:05:31,033 INFO L87 Difference]: Start difference. First operand 422 states and 568 transitions. Second operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 38 states have internal predecessors, (55), 10 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:05:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:05:40,868 INFO L93 Difference]: Finished difference Result 553 states and 758 transitions. [2024-11-14 05:05:40,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-14 05:05:40,868 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 44 states have (on average 1.25) internal successors, (55), 38 states have internal predecessors, (55), 10 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 119 [2024-11-14 05:05:40,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:05:40,871 INFO L225 Difference]: With dead ends: 553 [2024-11-14 05:05:40,871 INFO L226 Difference]: Without dead ends: 343 [2024-11-14 05:05:40,872 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 302 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=366, Invalid=4326, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 05:05:40,873 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 57 mSDsluCounter, 2599 mSDsCounter, 0 mSdLazyCounter, 3728 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2741 SdHoareTripleChecker+Invalid, 3765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:05:40,873 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 2741 Invalid, 3765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3728 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2024-11-14 05:05:40,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-11-14 05:05:40,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 303. [2024-11-14 05:05:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 222 states have (on average 1.3018018018018018) internal successors, (289), 227 states have internal predecessors, (289), 55 states have call successors, (55), 25 states have call predecessors, (55), 25 states have return successors, (55), 53 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-14 05:05:40,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 399 transitions. [2024-11-14 05:05:40,984 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 399 transitions. Word has length 119 [2024-11-14 05:05:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:05:40,984 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 399 transitions. [2024-11-14 05:05:40,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 44 states have (on average 1.25) internal successors, (55), 38 states have internal predecessors, (55), 10 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-14 05:05:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 399 transitions. [2024-11-14 05:05:40,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-14 05:05:40,985 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:05:40,986 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-14 05:05:41,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-14 05:05:41,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:05:41,186 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:05:41,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:05:41,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1641444103, now seen corresponding path program 1 times [2024-11-14 05:05:41,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:05:41,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162264929] [2024-11-14 05:05:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:05:41,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:05:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:05:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-14 05:05:41,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:05:41,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162264929] [2024-11-14 05:05:41,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162264929] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:05:41,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058513820] [2024-11-14 05:05:41,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:05:41,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:05:41,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:05:41,269 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:05:41,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-14 05:05:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:05:41,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:05:41,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:05:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-14 05:05:41,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:05:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-14 05:05:41,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058513820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:05:41,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727071872] [2024-11-14 05:05:41,694 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 05:05:41,695 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:05:41,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:05:41,696 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:05:41,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:05:44,097 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 05:05:44,214 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 05:05:44,215 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:05:45,298 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 76 for LOIs [2024-11-14 05:05:45,422 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 118 for LOIs [2024-11-14 05:05:45,488 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:05:57,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1727071872] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:05:57,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:05:57,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [4, 4, 4] total 55 [2024-11-14 05:05:57,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741769023] [2024-11-14 05:05:57,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:05:57,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-14 05:05:57,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:05:57,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-14 05:05:57,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2765, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 05:05:57,250 INFO L87 Difference]: Start difference. First operand 303 states and 399 transitions. Second operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 39 states have internal predecessors, (55), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:06:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:06:06,243 INFO L93 Difference]: Finished difference Result 532 states and 725 transitions. [2024-11-14 05:06:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-14 05:06:06,243 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 44 states have (on average 1.25) internal successors, (55), 39 states have internal predecessors, (55), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) Word has length 121 [2024-11-14 05:06:06,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:06:06,246 INFO L225 Difference]: With dead ends: 532 [2024-11-14 05:06:06,246 INFO L226 Difference]: Without dead ends: 421 [2024-11-14 05:06:06,246 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 311 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=296, Invalid=3994, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 05:06:06,247 INFO L432 NwaCegarLoop]: 229 mSDtfsCounter, 109 mSDsluCounter, 3105 mSDsCounter, 0 mSdLazyCounter, 4863 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 4888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 4863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:06:06,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 3334 Invalid, 4888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 4863 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2024-11-14 05:06:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2024-11-14 05:06:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 373. [2024-11-14 05:06:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 271 states have (on average 1.2841328413284132) internal successors, (348), 277 states have internal predecessors, (348), 70 states have call successors, (70), 30 states have call predecessors, (70), 31 states have return successors, (71), 68 states have call predecessors, (71), 70 states have call successors, (71) [2024-11-14 05:06:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 489 transitions. [2024-11-14 05:06:06,377 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 489 transitions. Word has length 121 [2024-11-14 05:06:06,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:06:06,377 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 489 transitions. [2024-11-14 05:06:06,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 44 states have (on average 1.25) internal successors, (55), 39 states have internal predecessors, (55), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:06:06,377 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 489 transitions. [2024-11-14 05:06:06,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-14 05:06:06,378 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:06:06,378 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-14 05:06:06,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-14 05:06:06,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-14 05:06:06,579 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:06:06,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:06:06,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1859331459, now seen corresponding path program 1 times [2024-11-14 05:06:06,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:06:06,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318719149] [2024-11-14 05:06:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:06:06,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:06:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:06:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-14 05:06:06,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:06:06,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318719149] [2024-11-14 05:06:06,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318719149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:06:06,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436749507] [2024-11-14 05:06:06,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:06:06,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:06:06,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:06:06,653 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:06:06,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-14 05:06:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:06:06,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:06:06,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:06:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-14 05:06:06,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:06:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-14 05:06:07,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436749507] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:06:07,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1574004959] [2024-11-14 05:06:07,015 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 05:06:07,015 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:06:07,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:06:07,015 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:06:07,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:06:08,668 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 65 for LOIs [2024-11-14 05:06:08,781 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2024-11-14 05:06:08,786 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:06:09,954 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 78 for LOIs [2024-11-14 05:06:10,054 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 74 for LOIs [2024-11-14 05:06:10,069 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:06:18,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1574004959] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:06:18,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:06:18,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [4, 4, 4] total 55 [2024-11-14 05:06:18,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868068335] [2024-11-14 05:06:18,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:06:18,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-14 05:06:18,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:06:18,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-14 05:06:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2729, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 05:06:18,663 INFO L87 Difference]: Start difference. First operand 373 states and 489 transitions. Second operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 38 states have internal predecessors, (55), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:06:29,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:06:29,006 INFO L93 Difference]: Finished difference Result 620 states and 841 transitions. [2024-11-14 05:06:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-14 05:06:29,006 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 44 states have (on average 1.25) internal successors, (55), 38 states have internal predecessors, (55), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) Word has length 121 [2024-11-14 05:06:29,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:06:29,009 INFO L225 Difference]: With dead ends: 620 [2024-11-14 05:06:29,009 INFO L226 Difference]: Without dead ends: 509 [2024-11-14 05:06:29,010 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 310 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=363, Invalid=4329, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 05:06:29,010 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 286 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 5710 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 2424 SdHoareTripleChecker+Invalid, 5788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 5710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:06:29,010 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 2424 Invalid, 5788 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [78 Valid, 5710 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2024-11-14 05:06:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2024-11-14 05:06:29,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 487. [2024-11-14 05:06:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 347 states have (on average 1.2910662824207493) internal successors, (448), 358 states have internal predecessors, (448), 99 states have call successors, (99), 39 states have call predecessors, (99), 40 states have return successors, (100), 93 states have call predecessors, (100), 99 states have call successors, (100) [2024-11-14 05:06:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 647 transitions. [2024-11-14 05:06:29,283 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 647 transitions. Word has length 121 [2024-11-14 05:06:29,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:06:29,284 INFO L471 AbstractCegarLoop]: Abstraction has 487 states and 647 transitions. [2024-11-14 05:06:29,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 44 states have (on average 1.25) internal successors, (55), 38 states have internal predecessors, (55), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:06:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 647 transitions. [2024-11-14 05:06:29,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-14 05:06:29,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:06:29,285 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-14 05:06:29,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-14 05:06:29,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-14 05:06:29,486 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:06:29,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:06:29,487 INFO L85 PathProgramCache]: Analyzing trace with hash 612257067, now seen corresponding path program 1 times [2024-11-14 05:06:29,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:06:29,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374213507] [2024-11-14 05:06:29,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:06:29,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:06:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:06:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-14 05:06:29,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:06:29,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374213507] [2024-11-14 05:06:29,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374213507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:06:29,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431833287] [2024-11-14 05:06:29,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:06:29,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:06:29,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:06:29,604 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:06:29,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-14 05:06:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:06:29,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:06:29,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:06:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-14 05:06:29,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:06:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-14 05:06:29,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431833287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:06:29,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [545883271] [2024-11-14 05:06:29,927 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 05:06:29,927 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:06:29,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:06:29,927 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:06:29,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:06:31,465 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 05:06:31,566 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2024-11-14 05:06:31,570 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:06:32,545 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 76 for LOIs [2024-11-14 05:06:32,650 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 88 for LOIs [2024-11-14 05:06:32,668 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:06:43,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [545883271] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:06:43,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:06:43,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [4, 4, 4] total 56 [2024-11-14 05:06:43,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850640929] [2024-11-14 05:06:43,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:06:43,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-14 05:06:43,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:06:43,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-14 05:06:43,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2833, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 05:06:43,262 INFO L87 Difference]: Start difference. First operand 487 states and 647 transitions. Second operand has 52 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 39 states have internal predecessors, (55), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:06:55,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:06:55,063 INFO L93 Difference]: Finished difference Result 740 states and 1008 transitions. [2024-11-14 05:06:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-14 05:06:55,064 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 39 states have internal predecessors, (55), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) Word has length 121 [2024-11-14 05:06:55,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:06:55,066 INFO L225 Difference]: With dead ends: 740 [2024-11-14 05:06:55,067 INFO L226 Difference]: Without dead ends: 629 [2024-11-14 05:06:55,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 309 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=397, Invalid=5005, Unknown=0, NotChecked=0, Total=5402 [2024-11-14 05:06:55,068 INFO L432 NwaCegarLoop]: 189 mSDtfsCounter, 213 mSDsluCounter, 2539 mSDsCounter, 0 mSdLazyCounter, 5544 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 5606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 5544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:06:55,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 2728 Invalid, 5606 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [62 Valid, 5544 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2024-11-14 05:06:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2024-11-14 05:06:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 506. [2024-11-14 05:06:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 361 states have (on average 1.2853185595567866) internal successors, (464), 372 states have internal predecessors, (464), 102 states have call successors, (102), 41 states have call predecessors, (102), 42 states have return successors, (103), 96 states have call predecessors, (103), 102 states have call successors, (103) [2024-11-14 05:06:55,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 669 transitions. [2024-11-14 05:06:55,251 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 669 transitions. Word has length 121 [2024-11-14 05:06:55,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:06:55,251 INFO L471 AbstractCegarLoop]: Abstraction has 506 states and 669 transitions. [2024-11-14 05:06:55,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 39 states have internal predecessors, (55), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:06:55,251 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 669 transitions. [2024-11-14 05:06:55,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-14 05:06:55,252 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:06:55,252 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:06:55,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-14 05:06:55,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-14 05:06:55,453 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:06:55,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:06:55,453 INFO L85 PathProgramCache]: Analyzing trace with hash -695401120, now seen corresponding path program 1 times [2024-11-14 05:06:55,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:06:55,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757662104] [2024-11-14 05:06:55,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:06:55,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:06:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:06:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-14 05:06:55,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:06:55,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757662104] [2024-11-14 05:06:55,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757662104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:06:55,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808016995] [2024-11-14 05:06:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:06:55,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:06:55,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:06:55,568 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:06:55,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-14 05:06:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:06:55,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:06:55,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:06:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-14 05:06:55,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:06:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-14 05:06:56,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808016995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:06:56,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55088268] [2024-11-14 05:06:56,032 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 05:06:56,032 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:06:56,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:06:56,033 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:06:56,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:06:58,497 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 05:06:58,612 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 05:06:58,613 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:07:00,093 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 66 for LOIs [2024-11-14 05:07:00,235 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:07:10,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [55088268] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:07:10,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:07:10,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [4, 4, 4] total 53 [2024-11-14 05:07:10,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842545585] [2024-11-14 05:07:10,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:07:10,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 05:07:10,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:07:10,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 05:07:10,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2557, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 05:07:10,379 INFO L87 Difference]: Start difference. First operand 506 states and 669 transitions. Second operand has 49 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 38 states have internal predecessors, (55), 11 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:07:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:07:17,732 INFO L93 Difference]: Finished difference Result 686 states and 934 transitions. [2024-11-14 05:07:17,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-14 05:07:17,732 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 38 states have internal predecessors, (55), 11 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) Word has length 123 [2024-11-14 05:07:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:07:17,734 INFO L225 Difference]: With dead ends: 686 [2024-11-14 05:07:17,734 INFO L226 Difference]: Without dead ends: 547 [2024-11-14 05:07:17,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 319 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=290, Invalid=3742, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 05:07:17,735 INFO L432 NwaCegarLoop]: 227 mSDtfsCounter, 155 mSDsluCounter, 3291 mSDsCounter, 0 mSdLazyCounter, 4661 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 4702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 4661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:07:17,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 3518 Invalid, 4702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 4661 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-14 05:07:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2024-11-14 05:07:17,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 514. [2024-11-14 05:07:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 367 states have (on average 1.2861035422343323) internal successors, (472), 378 states have internal predecessors, (472), 103 states have call successors, (103), 42 states have call predecessors, (103), 43 states have return successors, (104), 97 states have call predecessors, (104), 103 states have call successors, (104) [2024-11-14 05:07:17,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 679 transitions. [2024-11-14 05:07:17,885 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 679 transitions. Word has length 123 [2024-11-14 05:07:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:07:17,885 INFO L471 AbstractCegarLoop]: Abstraction has 514 states and 679 transitions. [2024-11-14 05:07:17,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 38 states have internal predecessors, (55), 11 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:07:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 679 transitions. [2024-11-14 05:07:17,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-14 05:07:17,887 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:07:17,887 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:07:17,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-14 05:07:18,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-14 05:07:18,088 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:07:18,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:07:18,088 INFO L85 PathProgramCache]: Analyzing trace with hash 368247268, now seen corresponding path program 1 times [2024-11-14 05:07:18,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:07:18,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238135567] [2024-11-14 05:07:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:07:18,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:07:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:07:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-14 05:07:18,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:07:18,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238135567] [2024-11-14 05:07:18,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238135567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:07:18,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406371045] [2024-11-14 05:07:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:07:18,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:07:18,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:07:18,191 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:07:18,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-14 05:07:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:07:18,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:07:18,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:07:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-14 05:07:18,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:07:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-14 05:07:18,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406371045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:07:18,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [528620434] [2024-11-14 05:07:18,530 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 05:07:18,531 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:07:18,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:07:18,531 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:07:18,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:07:20,035 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 65 for LOIs [2024-11-14 05:07:20,147 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2024-11-14 05:07:20,151 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:07:21,187 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 66 for LOIs [2024-11-14 05:07:21,292 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:07:30,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [528620434] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:07:30,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:07:30,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [4, 4, 4] total 53 [2024-11-14 05:07:30,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602024895] [2024-11-14 05:07:30,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:07:30,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 05:07:30,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:07:30,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 05:07:30,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2522, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 05:07:30,637 INFO L87 Difference]: Start difference. First operand 514 states and 679 transitions. Second operand has 49 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 37 states have internal predecessors, (55), 11 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:07:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:07:41,901 INFO L93 Difference]: Finished difference Result 840 states and 1147 transitions. [2024-11-14 05:07:41,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-14 05:07:41,901 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 37 states have internal predecessors, (55), 11 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) Word has length 123 [2024-11-14 05:07:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:07:41,905 INFO L225 Difference]: With dead ends: 840 [2024-11-14 05:07:41,905 INFO L226 Difference]: Without dead ends: 639 [2024-11-14 05:07:41,907 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 318 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=357, Invalid=4065, Unknown=0, NotChecked=0, Total=4422 [2024-11-14 05:07:41,907 INFO L432 NwaCegarLoop]: 214 mSDtfsCounter, 273 mSDsluCounter, 2754 mSDsCounter, 0 mSdLazyCounter, 5869 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 2968 SdHoareTripleChecker+Invalid, 5947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 5869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:07:41,908 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 2968 Invalid, 5947 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [78 Valid, 5869 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2024-11-14 05:07:41,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2024-11-14 05:07:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 619. [2024-11-14 05:07:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 438 states have (on average 1.2968036529680365) internal successors, (568), 453 states have internal predecessors, (568), 129 states have call successors, (129), 50 states have call predecessors, (129), 51 states have return successors, (130), 120 states have call predecessors, (130), 129 states have call successors, (130) [2024-11-14 05:07:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 827 transitions. [2024-11-14 05:07:42,143 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 827 transitions. Word has length 123 [2024-11-14 05:07:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:07:42,143 INFO L471 AbstractCegarLoop]: Abstraction has 619 states and 827 transitions. [2024-11-14 05:07:42,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 37 states have internal predecessors, (55), 11 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:07:42,144 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 827 transitions. [2024-11-14 05:07:42,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-14 05:07:42,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:07:42,145 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:07:42,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-14 05:07:42,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:07:42,346 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:07:42,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:07:42,346 INFO L85 PathProgramCache]: Analyzing trace with hash 447906066, now seen corresponding path program 1 times [2024-11-14 05:07:42,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:07:42,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056714912] [2024-11-14 05:07:42,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:07:42,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:07:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:07:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-14 05:07:42,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:07:42,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056714912] [2024-11-14 05:07:42,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056714912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:07:42,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544580720] [2024-11-14 05:07:42,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:07:42,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:07:42,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:07:42,424 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:07:42,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-14 05:07:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:07:42,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:07:42,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:07:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-14 05:07:42,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:07:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-14 05:07:42,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544580720] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:07:42,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [598460903] [2024-11-14 05:07:42,833 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 05:07:42,833 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:07:42,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:07:42,834 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:07:42,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:07:44,397 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 05:07:44,510 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2024-11-14 05:07:44,515 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:07:45,770 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 77 for LOIs [2024-11-14 05:07:45,915 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:07:55,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [598460903] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:07:55,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:07:55,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [4, 4, 4] total 54 [2024-11-14 05:07:55,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343966182] [2024-11-14 05:07:55,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:07:55,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 05:07:55,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:07:55,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 05:07:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2624, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 05:07:55,364 INFO L87 Difference]: Start difference. First operand 619 states and 827 transitions. Second operand has 50 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 38 states have internal predecessors, (55), 11 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:08:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:08:05,958 INFO L93 Difference]: Finished difference Result 849 states and 1158 transitions. [2024-11-14 05:08:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-14 05:08:05,959 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 38 states have internal predecessors, (55), 11 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) Word has length 123 [2024-11-14 05:08:05,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:08:05,962 INFO L225 Difference]: With dead ends: 849 [2024-11-14 05:08:05,962 INFO L226 Difference]: Without dead ends: 648 [2024-11-14 05:08:05,963 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 317 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=394, Invalid=4862, Unknown=0, NotChecked=0, Total=5256 [2024-11-14 05:08:05,964 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 195 mSDsluCounter, 2206 mSDsCounter, 0 mSdLazyCounter, 5092 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 2383 SdHoareTripleChecker+Invalid, 5145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 5092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:08:05,964 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 2383 Invalid, 5145 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [53 Valid, 5092 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2024-11-14 05:08:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2024-11-14 05:08:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 519. [2024-11-14 05:08:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 371 states have (on average 1.2857142857142858) internal successors, (477), 382 states have internal predecessors, (477), 103 states have call successors, (103), 43 states have call predecessors, (103), 44 states have return successors, (104), 97 states have call predecessors, (104), 103 states have call successors, (104) [2024-11-14 05:08:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 684 transitions. [2024-11-14 05:08:06,280 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 684 transitions. Word has length 123 [2024-11-14 05:08:06,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:08:06,281 INFO L471 AbstractCegarLoop]: Abstraction has 519 states and 684 transitions. [2024-11-14 05:08:06,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 38 states have internal predecessors, (55), 11 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 05:08:06,281 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 684 transitions. [2024-11-14 05:08:06,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-14 05:08:06,283 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:08:06,283 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:08:06,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-14 05:08:06,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:08:06,484 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:08:06,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:08:06,484 INFO L85 PathProgramCache]: Analyzing trace with hash 37088720, now seen corresponding path program 1 times [2024-11-14 05:08:06,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:08:06,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227406652] [2024-11-14 05:08:06,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:08:06,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:08:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:08:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-11-14 05:08:06,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:08:06,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227406652] [2024-11-14 05:08:06,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227406652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:08:06,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483019832] [2024-11-14 05:08:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:08:06,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:08:06,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:08:06,591 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:08:06,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be68523b-aae3-419f-8ead-533645102447/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-14 05:08:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:08:06,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:08:06,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:08:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 05:08:06,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:08:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-11-14 05:08:06,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483019832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:08:06,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126897474] [2024-11-14 05:08:06,978 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 05:08:06,979 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:08:06,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:08:06,979 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:08:06,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:08:09,764 INFO L197 IcfgInterpreter]: Interpreting procedure write_history_bool with input of size 62 for LOIs [2024-11-14 05:08:09,903 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 05:08:09,904 INFO L197 IcfgInterpreter]: Interpreting procedure add_history_type with input of size 59 for LOIs [2024-11-14 05:08:10,979 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_bool with input of size 76 for LOIs [2024-11-14 05:08:11,094 INFO L197 IcfgInterpreter]: Interpreting procedure read_history_int8 with input of size 118 for LOIs [2024-11-14 05:08:11,174 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:08:24,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2126897474] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:08:24,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:08:24,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [4, 4, 4] total 56 [2024-11-14 05:08:24,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119004027] [2024-11-14 05:08:24,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:08:24,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-14 05:08:24,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:08:24,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-14 05:08:24,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2871, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 05:08:24,064 INFO L87 Difference]: Start difference. First operand 519 states and 684 transitions. Second operand has 52 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 39 states have internal predecessors, (56), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13)