./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh --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 d07f8866cb9bb11c792ba110404f1fc964b1e4b380540b8d73177141eae78bfc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 20:08:00,544 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 20:08:00,650 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 20:08:00,656 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 20:08:00,656 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 20:08:00,678 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 20:08:00,679 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 20:08:00,680 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 20:08:00,681 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 20:08:00,681 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 20:08:00,682 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 20:08:00,683 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 20:08:00,683 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 20:08:00,684 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 20:08:00,684 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 20:08:00,685 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 20:08:00,686 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 20:08:00,686 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 20:08:00,687 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 20:08:00,687 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 20:08:00,688 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 20:08:00,689 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 20:08:00,689 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 20:08:00,690 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 20:08:00,690 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 20:08:00,691 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 20:08:00,693 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 20:08:00,693 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 20:08:00,694 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 20:08:00,694 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 20:08:00,695 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 20:08:00,695 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 20:08:00,696 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 20:08:00,696 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 20:08:00,697 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 20:08:00,697 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 20:08:00,698 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 20:08:00,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:08:00,699 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 20:08:00,699 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 20:08:00,699 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 20:08:00,699 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 20:08:00,700 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 20:08:00,700 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 20:08:00,700 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 20:08:00,700 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 20:08:00,700 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 20:08:00,700 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d07f8866cb9bb11c792ba110404f1fc964b1e4b380540b8d73177141eae78bfc [2023-12-02 20:08:00,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 20:08:00,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 20:08:00,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 20:08:00,994 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 20:08:00,994 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 20:08:00,996 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-02 20:08:03,853 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 20:08:04,072 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 20:08:04,073 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-02 20:08:04,084 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/data/c68c5b336/8b0a58dd8aec41a2b38051c1cfea75d9/FLAG6f0bb3cde [2023-12-02 20:08:04,098 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/data/c68c5b336/8b0a58dd8aec41a2b38051c1cfea75d9 [2023-12-02 20:08:04,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 20:08:04,102 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 20:08:04,103 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 20:08:04,103 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 20:08:04,108 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 20:08:04,109 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:08:04" (1/1) ... [2023-12-02 20:08:04,110 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f0ad473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:04, skipping insertion in model container [2023-12-02 20:08:04,111 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:08:04" (1/1) ... [2023-12-02 20:08:04,157 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 20:08:04,367 WARN L240 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_a6132a7b-a114-4bdc-8df2-53a5f289b462/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6358,6371] [2023-12-02 20:08:04,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:08:04,431 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 20:08:04,482 WARN L240 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_a6132a7b-a114-4bdc-8df2-53a5f289b462/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6358,6371] [2023-12-02 20:08:04,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:08:04,523 INFO L206 MainTranslator]: Completed translation [2023-12-02 20:08:04,523 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:04 WrapperNode [2023-12-02 20:08:04,523 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 20:08:04,524 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 20:08:04,524 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 20:08:04,525 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 20:08:04,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:04" (1/1) ... [2023-12-02 20:08:04,543 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:04" (1/1) ... [2023-12-02 20:08:04,584 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 549 [2023-12-02 20:08:04,585 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 20:08:04,585 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 20:08:04,586 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 20:08:04,586 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 20:08:04,596 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:04" (1/1) ... [2023-12-02 20:08:04,596 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:04" (1/1) ... [2023-12-02 20:08:04,600 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:04" (1/1) ... [2023-12-02 20:08:04,600 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:04" (1/1) ... [2023-12-02 20:08:04,611 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:04" (1/1) ... [2023-12-02 20:08:04,616 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:04" (1/1) ... [2023-12-02 20:08:04,619 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:04" (1/1) ... [2023-12-02 20:08:04,622 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:04" (1/1) ... [2023-12-02 20:08:04,627 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 20:08:04,628 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 20:08:04,628 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 20:08:04,628 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 20:08:04,629 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:04" (1/1) ... [2023-12-02 20:08:04,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:08:04,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:08:04,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 20:08:04,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 20:08:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 20:08:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 20:08:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 20:08:04,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 20:08:04,838 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 20:08:04,840 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 20:08:05,379 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 20:08:05,534 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 20:08:05,535 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 20:08:05,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:08:05 BoogieIcfgContainer [2023-12-02 20:08:05,537 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 20:08:05,539 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 20:08:05,540 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 20:08:05,543 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 20:08:05,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:08:04" (1/3) ... [2023-12-02 20:08:05,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685d3690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:08:05, skipping insertion in model container [2023-12-02 20:08:05,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:04" (2/3) ... [2023-12-02 20:08:05,544 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685d3690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:08:05, skipping insertion in model container [2023-12-02 20:08:05,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:08:05" (3/3) ... [2023-12-02 20:08:05,546 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-02 20:08:05,565 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 20:08:05,565 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 20:08:05,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 20:08:05,623 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@70981348, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 20:08:05,623 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 20:08:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 98 states have (on average 1.683673469387755) internal successors, (165), 99 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 20:08:05,637 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:05,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:05,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:05,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:05,642 INFO L85 PathProgramCache]: Analyzing trace with hash 754684388, now seen corresponding path program 1 times [2023-12-02 20:08:05,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:05,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850663986] [2023-12-02 20:08:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:05,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:08:06,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:06,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850663986] [2023-12-02 20:08:06,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850663986] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:06,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:08:06,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:08:06,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89792135] [2023-12-02 20:08:06,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:06,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:08:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:06,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:08:06,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:06,072 INFO L87 Difference]: Start difference. First operand has 100 states, 98 states have (on average 1.683673469387755) internal successors, (165), 99 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:06,161 INFO L93 Difference]: Finished difference Result 226 states and 352 transitions. [2023-12-02 20:08:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:08:06,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-02 20:08:06,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:06,175 INFO L225 Difference]: With dead ends: 226 [2023-12-02 20:08:06,175 INFO L226 Difference]: Without dead ends: 156 [2023-12-02 20:08:06,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:06,182 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 121 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:06,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 324 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:08:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-12-02 20:08:06,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2023-12-02 20:08:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.4052287581699345) internal successors, (215), 153 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 215 transitions. [2023-12-02 20:08:06,229 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 215 transitions. Word has length 47 [2023-12-02 20:08:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:06,230 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 215 transitions. [2023-12-02 20:08:06,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 215 transitions. [2023-12-02 20:08:06,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 20:08:06,232 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:06,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:06,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 20:08:06,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:06,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:06,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1897585646, now seen corresponding path program 1 times [2023-12-02 20:08:06,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:06,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370999262] [2023-12-02 20:08:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:06,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:08:06,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:06,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370999262] [2023-12-02 20:08:06,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370999262] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:06,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:08:06,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:08:06,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659137495] [2023-12-02 20:08:06,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:06,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:08:06,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:06,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:08:06,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:06,368 INFO L87 Difference]: Start difference. First operand 154 states and 215 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:06,419 INFO L93 Difference]: Finished difference Result 372 states and 543 transitions. [2023-12-02 20:08:06,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:08:06,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-02 20:08:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:06,423 INFO L225 Difference]: With dead ends: 372 [2023-12-02 20:08:06,424 INFO L226 Difference]: Without dead ends: 252 [2023-12-02 20:08:06,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:06,426 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 89 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:06,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 263 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:08:06,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-12-02 20:08:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2023-12-02 20:08:06,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.4417670682730923) internal successors, (359), 249 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 359 transitions. [2023-12-02 20:08:06,445 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 359 transitions. Word has length 49 [2023-12-02 20:08:06,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:06,446 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 359 transitions. [2023-12-02 20:08:06,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 359 transitions. [2023-12-02 20:08:06,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 20:08:06,448 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:06,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:06,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 20:08:06,449 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:06,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:06,450 INFO L85 PathProgramCache]: Analyzing trace with hash -201292940, now seen corresponding path program 1 times [2023-12-02 20:08:06,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:06,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067889764] [2023-12-02 20:08:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:06,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:08:06,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:06,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067889764] [2023-12-02 20:08:06,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067889764] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:06,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:08:06,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:08:06,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063173419] [2023-12-02 20:08:06,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:06,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:08:06,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:06,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:08:06,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:06,542 INFO L87 Difference]: Start difference. First operand 250 states and 359 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:06,589 INFO L93 Difference]: Finished difference Result 638 states and 941 transitions. [2023-12-02 20:08:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:08:06,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-12-02 20:08:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:06,595 INFO L225 Difference]: With dead ends: 638 [2023-12-02 20:08:06,595 INFO L226 Difference]: Without dead ends: 422 [2023-12-02 20:08:06,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:06,598 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 84 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:06,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 248 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:08:06,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-12-02 20:08:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2023-12-02 20:08:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.458233890214797) internal successors, (611), 419 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 611 transitions. [2023-12-02 20:08:06,626 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 611 transitions. Word has length 52 [2023-12-02 20:08:06,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:06,627 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 611 transitions. [2023-12-02 20:08:06,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,627 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 611 transitions. [2023-12-02 20:08:06,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 20:08:06,630 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:06,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:06,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 20:08:06,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:06,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1259338118, now seen corresponding path program 1 times [2023-12-02 20:08:06,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:06,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614661020] [2023-12-02 20:08:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:06,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:08:06,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:06,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614661020] [2023-12-02 20:08:06,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614661020] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:06,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:08:06,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:08:06,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135632214] [2023-12-02 20:08:06,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:06,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:08:06,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:06,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:08:06,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:06,709 INFO L87 Difference]: Start difference. First operand 420 states and 611 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:06,757 INFO L93 Difference]: Finished difference Result 1104 states and 1629 transitions. [2023-12-02 20:08:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:08:06,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-02 20:08:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:06,762 INFO L225 Difference]: With dead ends: 1104 [2023-12-02 20:08:06,762 INFO L226 Difference]: Without dead ends: 718 [2023-12-02 20:08:06,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:06,765 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 79 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:06,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 233 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:08:06,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2023-12-02 20:08:06,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 716. [2023-12-02 20:08:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.4587412587412587) internal successors, (1043), 715 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1043 transitions. [2023-12-02 20:08:06,791 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1043 transitions. Word has length 55 [2023-12-02 20:08:06,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:06,792 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 1043 transitions. [2023-12-02 20:08:06,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,792 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1043 transitions. [2023-12-02 20:08:06,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 20:08:06,794 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:06,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:06,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 20:08:06,795 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:06,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash -55082764, now seen corresponding path program 1 times [2023-12-02 20:08:06,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:06,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394750703] [2023-12-02 20:08:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:06,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:08:06,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:06,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394750703] [2023-12-02 20:08:06,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394750703] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:06,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:08:06,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:08:06,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607984526] [2023-12-02 20:08:06,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:06,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:08:06,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:06,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:08:06,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:06,880 INFO L87 Difference]: Start difference. First operand 716 states and 1043 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:06,929 INFO L93 Difference]: Finished difference Result 1904 states and 2789 transitions. [2023-12-02 20:08:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:08:06,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-12-02 20:08:06,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:06,937 INFO L225 Difference]: With dead ends: 1904 [2023-12-02 20:08:06,937 INFO L226 Difference]: Without dead ends: 1222 [2023-12-02 20:08:06,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:06,940 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 74 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:06,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 218 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:08:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2023-12-02 20:08:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1220. [2023-12-02 20:08:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 1.446267432321575) internal successors, (1763), 1219 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1763 transitions. [2023-12-02 20:08:06,979 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1763 transitions. Word has length 58 [2023-12-02 20:08:06,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:06,979 INFO L495 AbstractCegarLoop]: Abstraction has 1220 states and 1763 transitions. [2023-12-02 20:08:06,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:06,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1763 transitions. [2023-12-02 20:08:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 20:08:06,981 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:06,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:06,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 20:08:06,982 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:06,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:06,983 INFO L85 PathProgramCache]: Analyzing trace with hash 755326459, now seen corresponding path program 1 times [2023-12-02 20:08:06,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:06,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336380307] [2023-12-02 20:08:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:06,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:08:07,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:07,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336380307] [2023-12-02 20:08:07,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336380307] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:07,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:08:07,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 20:08:07,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650574200] [2023-12-02 20:08:07,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:07,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 20:08:07,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:07,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 20:08:07,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:08:07,212 INFO L87 Difference]: Start difference. First operand 1220 states and 1763 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:07,403 INFO L93 Difference]: Finished difference Result 6190 states and 8936 transitions. [2023-12-02 20:08:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 20:08:07,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-12-02 20:08:07,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:07,431 INFO L225 Difference]: With dead ends: 6190 [2023-12-02 20:08:07,432 INFO L226 Difference]: Without dead ends: 5004 [2023-12-02 20:08:07,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:08:07,436 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 467 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:07,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 544 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:08:07,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5004 states. [2023-12-02 20:08:07,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5004 to 4996. [2023-12-02 20:08:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4996 states, 4995 states have (on average 1.438838838838839) internal successors, (7187), 4995 states have internal predecessors, (7187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:07,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4996 states to 4996 states and 7187 transitions. [2023-12-02 20:08:07,594 INFO L78 Accepts]: Start accepts. Automaton has 4996 states and 7187 transitions. Word has length 61 [2023-12-02 20:08:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:07,594 INFO L495 AbstractCegarLoop]: Abstraction has 4996 states and 7187 transitions. [2023-12-02 20:08:07,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 4996 states and 7187 transitions. [2023-12-02 20:08:07,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 20:08:07,596 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:07,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:07,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 20:08:07,597 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:07,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:07,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2082296700, now seen corresponding path program 1 times [2023-12-02 20:08:07,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:07,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999395835] [2023-12-02 20:08:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:07,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:08:07,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:07,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999395835] [2023-12-02 20:08:07,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999395835] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:07,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:08:07,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 20:08:07,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708457528] [2023-12-02 20:08:07,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:07,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 20:08:07,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:07,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 20:08:07,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 20:08:07,705 INFO L87 Difference]: Start difference. First operand 4996 states and 7187 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:07,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:07,966 INFO L93 Difference]: Finished difference Result 12821 states and 18541 transitions. [2023-12-02 20:08:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 20:08:07,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-12-02 20:08:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:08,008 INFO L225 Difference]: With dead ends: 12821 [2023-12-02 20:08:08,008 INFO L226 Difference]: Without dead ends: 7859 [2023-12-02 20:08:08,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:08:08,015 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 512 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:08,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 135 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:08:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7859 states. [2023-12-02 20:08:08,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7859 to 7857. [2023-12-02 20:08:08,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7857 states, 7856 states have (on average 1.433172097759674) internal successors, (11259), 7856 states have internal predecessors, (11259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:08,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7857 states to 7857 states and 11259 transitions. [2023-12-02 20:08:08,212 INFO L78 Accepts]: Start accepts. Automaton has 7857 states and 11259 transitions. Word has length 63 [2023-12-02 20:08:08,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:08,212 INFO L495 AbstractCegarLoop]: Abstraction has 7857 states and 11259 transitions. [2023-12-02 20:08:08,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:08,213 INFO L276 IsEmpty]: Start isEmpty. Operand 7857 states and 11259 transitions. [2023-12-02 20:08:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 20:08:08,213 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:08,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:08,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 20:08:08,214 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:08,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:08,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1246791273, now seen corresponding path program 1 times [2023-12-02 20:08:08,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:08,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847818045] [2023-12-02 20:08:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:08,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:08:08,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:08,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847818045] [2023-12-02 20:08:08,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847818045] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:08,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:08:08,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 20:08:08,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129275606] [2023-12-02 20:08:08,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:08,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 20:08:08,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:08,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 20:08:08,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-12-02 20:08:08,722 INFO L87 Difference]: Start difference. First operand 7857 states and 11259 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:09,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:09,333 INFO L93 Difference]: Finished difference Result 16751 states and 24209 transitions. [2023-12-02 20:08:09,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 20:08:09,334 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-12-02 20:08:09,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:09,404 INFO L225 Difference]: With dead ends: 16751 [2023-12-02 20:08:09,404 INFO L226 Difference]: Without dead ends: 16749 [2023-12-02 20:08:09,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-12-02 20:08:09,410 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 1079 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:09,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 2179 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:08:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16749 states. [2023-12-02 20:08:09,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16749 to 8209. [2023-12-02 20:08:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8209 states, 8208 states have (on average 1.433845029239766) internal successors, (11769), 8208 states have internal predecessors, (11769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8209 states to 8209 states and 11769 transitions. [2023-12-02 20:08:09,665 INFO L78 Accepts]: Start accepts. Automaton has 8209 states and 11769 transitions. Word has length 63 [2023-12-02 20:08:09,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:09,666 INFO L495 AbstractCegarLoop]: Abstraction has 8209 states and 11769 transitions. [2023-12-02 20:08:09,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:08:09,666 INFO L276 IsEmpty]: Start isEmpty. Operand 8209 states and 11769 transitions. [2023-12-02 20:08:09,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 20:08:09,668 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:09,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:09,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 20:08:09,669 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:09,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:09,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1521547236, now seen corresponding path program 1 times [2023-12-02 20:08:09,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:09,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485310405] [2023-12-02 20:08:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:09,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:08:11,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:11,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485310405] [2023-12-02 20:08:11,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485310405] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:08:11,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761612008] [2023-12-02 20:08:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:11,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:08:11,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:08:11,324 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:08:11,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 20:08:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:11,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 66 conjunts are in the unsatisfiable core [2023-12-02 20:08:11,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:08:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:08:14,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:08:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:08:36,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761612008] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:08:36,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [414200254] [2023-12-02 20:08:36,705 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2023-12-02 20:08:36,705 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:08:36,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:08:36,714 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:08:36,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:09:00,091 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:09:25,805 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64488#(and (= ~nomsg~0 ~p1_new~0) (= ~nomsg~0 ~p4_new~0) (= |ULTIMATE.start_main_~assert__arg~0#1| 0) (= ~__return_33314~0 0) (<= 0 ~mode4~0) (= ~nomsg~0 ~p5_new~0) (<= 0 ~mode3~0) (= |ULTIMATE.start_main_~check__tmp~0#1| 0) (= ~p3_new~0 ~nomsg~0) (<= ~mode2~0 1) (<= ~mode5~0 1) (or (< 1 (+ ~st5~0 ~st4~0 ~st3~0 ~st2~0 ~st1~0)) (and (<= 5 (mod ~r1~0 256)) (not (= (+ ~st5~0 ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1)))) (<= ~mode3~0 1) (= |ULTIMATE.start_main_~main__c1~0#1| 0) (<= ~mode4~0 1) (= ~nomsg~0 ~p2_new~0) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0) (<= 0 ~mode5~0))' at error location [2023-12-02 20:09:25,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:09:25,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:09:25,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 52 [2023-12-02 20:09:25,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282765303] [2023-12-02 20:09:25,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:09:25,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-02 20:09:25,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:09:25,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-02 20:09:25,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=10499, Unknown=0, NotChecked=0, Total=12210 [2023-12-02 20:09:25,811 INFO L87 Difference]: Start difference. First operand 8209 states and 11769 transitions. Second operand has 52 states, 52 states have (on average 4.115384615384615) internal successors, (214), 52 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:15:47,234 INFO L93 Difference]: Finished difference Result 294973 states and 423091 transitions. [2023-12-02 20:15:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1094 states. [2023-12-02 20:15:47,235 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.115384615384615) internal successors, (214), 52 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-12-02 20:15:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:15:47,892 INFO L225 Difference]: With dead ends: 294973 [2023-12-02 20:15:47,892 INFO L226 Difference]: Without dead ends: 249212 [2023-12-02 20:15:48,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1329 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 1195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704237 ImplicationChecksByTransitivity, 359.9s TimeCoverageRelationStatistics Valid=150016, Invalid=1281596, Unknown=0, NotChecked=0, Total=1431612 [2023-12-02 20:15:48,246 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 29702 mSDsluCounter, 13779 mSDsCounter, 0 mSdLazyCounter, 16742 mSolverCounterSat, 2468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29702 SdHoareTripleChecker+Valid, 14001 SdHoareTripleChecker+Invalid, 19210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2468 IncrementalHoareTripleChecker+Valid, 16742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2023-12-02 20:15:48,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29702 Valid, 14001 Invalid, 19210 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2468 Valid, 16742 Invalid, 0 Unknown, 0 Unchecked, 32.9s Time] [2023-12-02 20:15:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249212 states. [2023-12-02 20:15:49,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249212 to 49090. [2023-12-02 20:15:49,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49090 states, 49089 states have (on average 1.3987451363849335) internal successors, (68663), 49089 states have internal predecessors, (68663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49090 states to 49090 states and 68663 transitions. [2023-12-02 20:15:50,022 INFO L78 Accepts]: Start accepts. Automaton has 49090 states and 68663 transitions. Word has length 75 [2023-12-02 20:15:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:15:50,022 INFO L495 AbstractCegarLoop]: Abstraction has 49090 states and 68663 transitions. [2023-12-02 20:15:50,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.115384615384615) internal successors, (214), 52 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 49090 states and 68663 transitions. [2023-12-02 20:15:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 20:15:50,027 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:15:50,028 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:15:50,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 20:15:50,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:15:50,229 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:15:50,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:15:50,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1378900712, now seen corresponding path program 1 times [2023-12-02 20:15:50,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:15:50,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463786908] [2023-12-02 20:15:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:50,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:15:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:52,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:15:52,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463786908] [2023-12-02 20:15:52,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463786908] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:15:52,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714891313] [2023-12-02 20:15:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:52,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:15:52,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:15:52,336 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:15:52,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6132a7b-a114-4bdc-8df2-53a5f289b462/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 20:15:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:52,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-02 20:15:52,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:54,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:16:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:14,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714891313] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:16:14,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511663084] [2023-12-02 20:16:14,923 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2023-12-02 20:16:14,924 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:16:14,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:16:14,924 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:16:14,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:17:12,609 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:17:39,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '411284#(and (= ~nomsg~0 ~p1_new~0) (= ~nomsg~0 ~p4_new~0) (= |ULTIMATE.start_main_~assert__arg~0#1| 0) (= ~__return_33314~0 0) (<= 0 ~mode4~0) (= ~nomsg~0 ~p5_new~0) (<= 0 ~mode3~0) (= |ULTIMATE.start_main_~check__tmp~0#1| 0) (= ~p3_new~0 ~nomsg~0) (<= ~mode2~0 1) (<= ~mode5~0 1) (or (< 1 (+ ~st5~0 ~st4~0 ~st3~0 ~st2~0 ~st1~0)) (and (<= 5 (mod ~r1~0 256)) (not (= (+ ~st5~0 ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1)))) (<= ~mode3~0 1) (= |ULTIMATE.start_main_~main__c1~0#1| 0) (<= ~mode4~0 1) (= ~nomsg~0 ~p2_new~0) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0) (<= 0 ~mode5~0))' at error location [2023-12-02 20:17:39,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:17:39,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:17:39,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 58 [2023-12-02 20:17:39,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998352227] [2023-12-02 20:17:39,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:17:39,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-12-02 20:17:39,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:17:39,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-12-02 20:17:39,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=11677, Unknown=0, NotChecked=0, Total=13572 [2023-12-02 20:17:39,352 INFO L87 Difference]: Start difference. First operand 49090 states and 68663 transitions. Second operand has 58 states, 58 states have (on average 3.8448275862068964) internal successors, (223), 58 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)