./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.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_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/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_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/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_d9037108-3e47-4482-8baf-cc25f8ba951d/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 4086756fe326e2f90904c763827ae3d38d44a78a9eb1422e3198b9e38a459658 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:56:53,669 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:56:53,731 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:56:53,736 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:56:53,737 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:56:53,762 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:56:53,762 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:56:53,763 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:56:53,764 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:56:53,764 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:56:53,765 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:56:53,765 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:56:53,766 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:56:53,766 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:56:53,767 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:56:53,767 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:56:53,768 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:56:53,768 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:56:53,768 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:56:53,769 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:56:53,769 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:56:53,774 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:56:53,774 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:56:53,775 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:56:53,775 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:56:53,776 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:56:53,776 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:56:53,776 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:56:53,777 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:56:53,777 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:56:53,777 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:56:53,778 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:56:53,778 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:56:53,778 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:56:53,778 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:56:53,779 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:56:53,779 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:56:53,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:56:53,779 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:56:53,779 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:56:53,780 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:56:53,780 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:56:53,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:56:53,780 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:56:53,781 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:56:53,781 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:56:53,781 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:56:53,781 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_d9037108-3e47-4482-8baf-cc25f8ba951d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4086756fe326e2f90904c763827ae3d38d44a78a9eb1422e3198b9e38a459658 [2023-12-02 19:56:54,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:56:54,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:56:54,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:56:54,046 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:56:54,047 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:56:54,048 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-02 19:56:56,792 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:56:56,989 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:56:56,989 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-02 19:56:56,999 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/data/6ff700a70/cb76986aaa76454d9d030bad79785667/FLAG1ca74bc5a [2023-12-02 19:56:57,009 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/data/6ff700a70/cb76986aaa76454d9d030bad79785667 [2023-12-02 19:56:57,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:56:57,012 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:56:57,013 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:56:57,013 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:56:57,019 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:56:57,019 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:56:57" (1/1) ... [2023-12-02 19:56:57,020 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@394b27e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:56:57, skipping insertion in model container [2023-12-02 19:56:57,021 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:56:57" (1/1) ... [2023-12-02 19:56:57,070 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:56:57,261 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_d9037108-3e47-4482-8baf-cc25f8ba951d/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2023-12-02 19:56:57,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:56:57,304 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:56:57,364 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_d9037108-3e47-4482-8baf-cc25f8ba951d/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7920,7933] [2023-12-02 19:56:57,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:56:57,405 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:56:57,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:56:57 WrapperNode [2023-12-02 19:56:57,405 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:56:57,406 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:56:57,407 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:56:57,407 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:56:57,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:56:57" (1/1) ... [2023-12-02 19:56:57,428 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:56:57" (1/1) ... [2023-12-02 19:56:57,462 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 676 [2023-12-02 19:56:57,463 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:56:57,463 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:56:57,463 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:56:57,464 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:56:57,471 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:56:57" (1/1) ... [2023-12-02 19:56:57,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:56:57" (1/1) ... [2023-12-02 19:56:57,474 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:56:57" (1/1) ... [2023-12-02 19:56:57,474 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:56:57" (1/1) ... [2023-12-02 19:56:57,485 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:56:57" (1/1) ... [2023-12-02 19:56:57,490 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:56:57" (1/1) ... [2023-12-02 19:56:57,494 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:56:57" (1/1) ... [2023-12-02 19:56:57,498 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:56:57" (1/1) ... [2023-12-02 19:56:57,503 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:56:57,504 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:56:57,504 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:56:57,504 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:56:57,505 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:56:57" (1/1) ... [2023-12-02 19:56:57,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:56:57,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:56:57,534 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:56:57,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:56:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:56:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:56:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:56:57,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:56:57,702 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:56:57,704 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:56:58,219 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:56:58,530 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:56:58,530 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 19:56:58,532 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:56:58 BoogieIcfgContainer [2023-12-02 19:56:58,532 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:56:58,534 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:56:58,534 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:56:58,537 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:56:58,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:56:57" (1/3) ... [2023-12-02 19:56:58,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32624e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:56:58, skipping insertion in model container [2023-12-02 19:56:58,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:56:57" (2/3) ... [2023-12-02 19:56:58,539 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32624e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:56:58, skipping insertion in model container [2023-12-02 19:56:58,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:56:58" (3/3) ... [2023-12-02 19:56:58,540 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-02 19:56:58,558 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:56:58,558 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:56:58,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:56:58,612 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;@5283d1cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:56:58,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:56:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 96 states have (on average 1.7708333333333333) internal successors, (170), 103 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:56:58,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 19:56:58,624 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:56:58,624 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] [2023-12-02 19:56:58,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:56:58,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:56:58,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1548564430, now seen corresponding path program 1 times [2023-12-02 19:56:58,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:56:58,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658566780] [2023-12-02 19:56:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:56:58,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:56:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:56:58,984 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 19:56:58,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:56:58,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658566780] [2023-12-02 19:56:58,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658566780] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:56:58,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:56:58,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:56:58,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762029097] [2023-12-02 19:56:58,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:56:58,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:56:58,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:56:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:56:59,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:56:59,017 INFO L87 Difference]: Start difference. First operand has 104 states, 96 states have (on average 1.7708333333333333) internal successors, (170), 103 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 19:56:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:56:59,091 INFO L93 Difference]: Finished difference Result 234 states and 361 transitions. [2023-12-02 19:56:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:56:59,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2023-12-02 19:56:59,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:56:59,103 INFO L225 Difference]: With dead ends: 234 [2023-12-02 19:56:59,103 INFO L226 Difference]: Without dead ends: 146 [2023-12-02 19:56:59,106 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 19:56:59,108 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 109 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:56:59,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 363 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:56:59,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-02 19:56:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2023-12-02 19:56:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.4335664335664335) internal successors, (205), 143 states have internal predecessors, (205), 0 states have call successors, (0), 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 19:56:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 205 transitions. [2023-12-02 19:56:59,146 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 205 transitions. Word has length 43 [2023-12-02 19:56:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:56:59,146 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 205 transitions. [2023-12-02 19:56:59,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 19:56:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 205 transitions. [2023-12-02 19:56:59,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 19:56:59,148 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:56:59,149 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] [2023-12-02 19:56:59,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:56:59,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:56:59,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:56:59,150 INFO L85 PathProgramCache]: Analyzing trace with hash 264224123, now seen corresponding path program 1 times [2023-12-02 19:56:59,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:56:59,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832238567] [2023-12-02 19:56:59,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:56:59,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:56:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:56:59,278 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 19:56:59,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:56:59,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832238567] [2023-12-02 19:56:59,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832238567] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:56:59,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:56:59,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:56:59,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660891435] [2023-12-02 19:56:59,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:56:59,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:56:59,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:56:59,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:56:59,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:56:59,283 INFO L87 Difference]: Start difference. First operand 144 states and 205 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 19:56:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:56:59,346 INFO L93 Difference]: Finished difference Result 321 states and 478 transitions. [2023-12-02 19:56:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:56:59,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2023-12-02 19:56:59,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:56:59,349 INFO L225 Difference]: With dead ends: 321 [2023-12-02 19:56:59,349 INFO L226 Difference]: Without dead ends: 209 [2023-12-02 19:56:59,350 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 19:56:59,352 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 91 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:56:59,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 215 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:56:59,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-12-02 19:56:59,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2023-12-02 19:56:59,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.4563106796116505) internal successors, (300), 206 states have internal predecessors, (300), 0 states have call successors, (0), 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 19:56:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 300 transitions. [2023-12-02 19:56:59,369 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 300 transitions. Word has length 45 [2023-12-02 19:56:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:56:59,370 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 300 transitions. [2023-12-02 19:56:59,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 19:56:59,370 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 300 transitions. [2023-12-02 19:56:59,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 19:56:59,372 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:56:59,373 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 19:56:59,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:56:59,373 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:56:59,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:56:59,374 INFO L85 PathProgramCache]: Analyzing trace with hash 776035132, now seen corresponding path program 1 times [2023-12-02 19:56:59,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:56:59,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273774692] [2023-12-02 19:56:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:56:59,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:56:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:56:59,463 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 19:56:59,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:56:59,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273774692] [2023-12-02 19:56:59,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273774692] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:56:59,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:56:59,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:56:59,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472627730] [2023-12-02 19:56:59,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:56:59,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:56:59,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:56:59,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:56:59,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:56:59,467 INFO L87 Difference]: Start difference. First operand 207 states and 300 transitions. 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 19:56:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:56:59,505 INFO L93 Difference]: Finished difference Result 511 states and 763 transitions. [2023-12-02 19:56:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:56:59,506 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 19:56:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:56:59,508 INFO L225 Difference]: With dead ends: 511 [2023-12-02 19:56:59,509 INFO L226 Difference]: Without dead ends: 338 [2023-12-02 19:56:59,510 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 19:56:59,512 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 90 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:56:59,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 265 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:56:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-12-02 19:56:59,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2023-12-02 19:56:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.471641791044776) internal successors, (493), 335 states have internal predecessors, (493), 0 states have call successors, (0), 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 19:56:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 493 transitions. [2023-12-02 19:56:59,530 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 493 transitions. Word has length 47 [2023-12-02 19:56:59,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:56:59,531 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 493 transitions. [2023-12-02 19:56:59,531 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 19:56:59,531 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 493 transitions. [2023-12-02 19:56:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 19:56:59,533 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:56:59,533 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 19:56:59,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 19:56:59,534 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:56:59,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:56:59,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2087634640, now seen corresponding path program 1 times [2023-12-02 19:56:59,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:56:59,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493666424] [2023-12-02 19:56:59,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:56:59,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:56:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:56:59,635 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 19:56:59,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:56:59,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493666424] [2023-12-02 19:56:59,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493666424] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:56:59,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:56:59,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:56:59,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319026766] [2023-12-02 19:56:59,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:56:59,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:56:59,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:56:59,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:56:59,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:56:59,638 INFO L87 Difference]: Start difference. First operand 336 states and 493 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 19:56:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:56:59,674 INFO L93 Difference]: Finished difference Result 827 states and 1242 transitions. [2023-12-02 19:56:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:56:59,675 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 19:56:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:56:59,678 INFO L225 Difference]: With dead ends: 827 [2023-12-02 19:56:59,678 INFO L226 Difference]: Without dead ends: 525 [2023-12-02 19:56:59,679 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 19:56:59,681 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 89 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:56:59,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 232 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:56:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2023-12-02 19:56:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 523. [2023-12-02 19:56:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.4923371647509578) internal successors, (779), 522 states have internal predecessors, (779), 0 states have call successors, (0), 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 19:56:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 779 transitions. [2023-12-02 19:56:59,695 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 779 transitions. Word has length 49 [2023-12-02 19:56:59,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:56:59,696 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 779 transitions. [2023-12-02 19:56:59,696 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 19:56:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 779 transitions. [2023-12-02 19:56:59,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 19:56:59,697 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:56:59,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:56:59,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 19:56:59,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:56:59,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:56:59,699 INFO L85 PathProgramCache]: Analyzing trace with hash 267956977, now seen corresponding path program 1 times [2023-12-02 19:56:59,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:56:59,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938698985] [2023-12-02 19:56:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:56:59,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:56:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:56:59,760 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 19:56:59,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:56:59,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938698985] [2023-12-02 19:56:59,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938698985] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:56:59,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:56:59,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:56:59,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476968203] [2023-12-02 19:56:59,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:56:59,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:56:59,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:56:59,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:56:59,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:56:59,763 INFO L87 Difference]: Start difference. First operand 523 states and 779 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 19:56:59,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:56:59,803 INFO L93 Difference]: Finished difference Result 1343 states and 2014 transitions. [2023-12-02 19:56:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:56:59,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2023-12-02 19:56:59,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:56:59,809 INFO L225 Difference]: With dead ends: 1343 [2023-12-02 19:56:59,809 INFO L226 Difference]: Without dead ends: 870 [2023-12-02 19:56:59,810 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 19:56:59,811 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 84 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:56:59,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 241 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:56:59,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2023-12-02 19:56:59,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 868. [2023-12-02 19:56:59,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.4798154555940024) internal successors, (1283), 867 states have internal predecessors, (1283), 0 states have call successors, (0), 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 19:56:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1283 transitions. [2023-12-02 19:56:59,830 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1283 transitions. Word has length 51 [2023-12-02 19:56:59,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:56:59,830 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 1283 transitions. [2023-12-02 19:56:59,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 19:56:59,831 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1283 transitions. [2023-12-02 19:56:59,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 19:56:59,832 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:56:59,832 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] [2023-12-02 19:56:59,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 19:56:59,832 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:56:59,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:56:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1173432233, now seen corresponding path program 1 times [2023-12-02 19:56:59,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:56:59,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366568690] [2023-12-02 19:56:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:56:59,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:56:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:56:59,908 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 19:56:59,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:56:59,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366568690] [2023-12-02 19:56:59,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366568690] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:56:59,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:56:59,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:56:59,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167468406] [2023-12-02 19:56:59,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:56:59,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:56:59,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:56:59,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:56:59,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:56:59,911 INFO L87 Difference]: Start difference. First operand 868 states and 1283 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 19:56:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:56:59,965 INFO L93 Difference]: Finished difference Result 2175 states and 3253 transitions. [2023-12-02 19:56:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:56:59,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2023-12-02 19:56:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:56:59,973 INFO L225 Difference]: With dead ends: 2175 [2023-12-02 19:56:59,973 INFO L226 Difference]: Without dead ends: 1357 [2023-12-02 19:56:59,974 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 19:56:59,976 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 83 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:56:59,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 234 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:56:59,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2023-12-02 19:57:00,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1355. [2023-12-02 19:57:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 1.4903988183161005) internal successors, (2018), 1354 states have internal predecessors, (2018), 0 states have call successors, (0), 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 19:57:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 2018 transitions. [2023-12-02 19:57:00,010 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 2018 transitions. Word has length 53 [2023-12-02 19:57:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:57:00,010 INFO L495 AbstractCegarLoop]: Abstraction has 1355 states and 2018 transitions. [2023-12-02 19:57:00,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 19:57:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 2018 transitions. [2023-12-02 19:57:00,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 19:57:00,011 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:57:00,011 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 19:57:00,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 19:57:00,012 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:57:00,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:57:00,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2007570392, now seen corresponding path program 1 times [2023-12-02 19:57:00,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:57:00,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277032272] [2023-12-02 19:57:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:00,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:57:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:00,117 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 19:57:00,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:57:00,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277032272] [2023-12-02 19:57:00,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277032272] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:57:00,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:57:00,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:57:00,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967933370] [2023-12-02 19:57:00,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:57:00,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:57:00,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:57:00,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:57:00,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:57:00,120 INFO L87 Difference]: Start difference. First operand 1355 states and 2018 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 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 19:57:00,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:57:00,314 INFO L93 Difference]: Finished difference Result 3443 states and 5162 transitions. [2023-12-02 19:57:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 19:57:00,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 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 19:57:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:57:00,326 INFO L225 Difference]: With dead ends: 3443 [2023-12-02 19:57:00,326 INFO L226 Difference]: Without dead ends: 2136 [2023-12-02 19:57:00,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 19:57:00,329 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 525 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:57:00,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 954 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:57:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2023-12-02 19:57:00,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2110. [2023-12-02 19:57:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 2109 states have (on average 1.498814604077762) internal successors, (3161), 2109 states have internal predecessors, (3161), 0 states have call successors, (0), 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 19:57:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 3161 transitions. [2023-12-02 19:57:00,383 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 3161 transitions. Word has length 55 [2023-12-02 19:57:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:57:00,384 INFO L495 AbstractCegarLoop]: Abstraction has 2110 states and 3161 transitions. [2023-12-02 19:57:00,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 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 19:57:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 3161 transitions. [2023-12-02 19:57:00,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 19:57:00,385 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:57:00,385 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] [2023-12-02 19:57:00,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 19:57:00,385 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:57:00,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:57:00,386 INFO L85 PathProgramCache]: Analyzing trace with hash 2042635835, now seen corresponding path program 1 times [2023-12-02 19:57:00,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:57:00,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991584574] [2023-12-02 19:57:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:00,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:57:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:00,474 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 19:57:00,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:57:00,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991584574] [2023-12-02 19:57:00,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991584574] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:57:00,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:57:00,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:57:00,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072541195] [2023-12-02 19:57:00,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:57:00,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:57:00,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:57:00,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:57:00,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:57:00,476 INFO L87 Difference]: Start difference. First operand 2110 states and 3161 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 19:57:00,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:57:00,554 INFO L93 Difference]: Finished difference Result 4156 states and 6241 transitions. [2023-12-02 19:57:00,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:57:00,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2023-12-02 19:57:00,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:57:00,564 INFO L225 Difference]: With dead ends: 4156 [2023-12-02 19:57:00,564 INFO L226 Difference]: Without dead ends: 2112 [2023-12-02 19:57:00,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:57:00,567 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 174 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:57:00,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 342 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:57:00,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2023-12-02 19:57:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 2107. [2023-12-02 19:57:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2106 states have (on average 1.4938271604938271) internal successors, (3146), 2106 states have internal predecessors, (3146), 0 states have call successors, (0), 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 19:57:00,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 3146 transitions. [2023-12-02 19:57:00,631 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 3146 transitions. Word has length 56 [2023-12-02 19:57:00,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:57:00,631 INFO L495 AbstractCegarLoop]: Abstraction has 2107 states and 3146 transitions. [2023-12-02 19:57:00,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 19:57:00,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 3146 transitions. [2023-12-02 19:57:00,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 19:57:00,632 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:57:00,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:57:00,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 19:57:00,633 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:57:00,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:57:00,633 INFO L85 PathProgramCache]: Analyzing trace with hash -728407056, now seen corresponding path program 1 times [2023-12-02 19:57:00,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:57:00,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574640271] [2023-12-02 19:57:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:00,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:57:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:00,936 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 19:57:00,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:57:00,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574640271] [2023-12-02 19:57:00,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574640271] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:57:00,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:57:00,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:57:00,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995632877] [2023-12-02 19:57:00,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:57:00,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:57:00,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:57:00,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:57:00,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:57:00,938 INFO L87 Difference]: Start difference. First operand 2107 states and 3146 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 19:57:01,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:57:01,028 INFO L93 Difference]: Finished difference Result 3440 states and 5082 transitions. [2023-12-02 19:57:01,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:57:01,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2023-12-02 19:57:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:57:01,047 INFO L225 Difference]: With dead ends: 3440 [2023-12-02 19:57:01,047 INFO L226 Difference]: Without dead ends: 3438 [2023-12-02 19:57:01,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:57:01,049 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 176 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:57:01,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 674 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:57:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3438 states. [2023-12-02 19:57:01,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3438 to 2151. [2023-12-02 19:57:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 1.4730232558139535) internal successors, (3167), 2150 states have internal predecessors, (3167), 0 states have call successors, (0), 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 19:57:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 3167 transitions. [2023-12-02 19:57:01,113 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 3167 transitions. Word has length 64 [2023-12-02 19:57:01,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:57:01,113 INFO L495 AbstractCegarLoop]: Abstraction has 2151 states and 3167 transitions. [2023-12-02 19:57:01,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 19:57:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 3167 transitions. [2023-12-02 19:57:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 19:57:01,114 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:57:01,114 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:57:01,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 19:57:01,115 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:57:01,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:57:01,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1206266662, now seen corresponding path program 1 times [2023-12-02 19:57:01,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:57:01,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608833466] [2023-12-02 19:57:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:01,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:57:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:57:02,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:57:02,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608833466] [2023-12-02 19:57:02,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608833466] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:57:02,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296910220] [2023-12-02 19:57:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:02,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:57:02,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:57:02,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:57:02,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:57:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:02,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 19:57:02,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:57:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:57:03,189 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:57:03,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296910220] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:57:03,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:57:03,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2023-12-02 19:57:03,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515843728] [2023-12-02 19:57:03,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:57:03,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:57:03,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:57:03,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:57:03,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-12-02 19:57:03,191 INFO L87 Difference]: Start difference. First operand 2151 states and 3167 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 19:57:03,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:57:03,278 INFO L93 Difference]: Finished difference Result 6196 states and 9137 transitions. [2023-12-02 19:57:03,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:57:03,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 74 [2023-12-02 19:57:03,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:57:03,296 INFO L225 Difference]: With dead ends: 6196 [2023-12-02 19:57:03,296 INFO L226 Difference]: Without dead ends: 4111 [2023-12-02 19:57:03,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-12-02 19:57:03,299 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 298 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:57:03,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 322 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:57:03,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2023-12-02 19:57:03,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 4109. [2023-12-02 19:57:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4108 states have (on average 1.4668938656280428) internal successors, (6026), 4108 states have internal predecessors, (6026), 0 states have call successors, (0), 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 19:57:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 6026 transitions. [2023-12-02 19:57:03,371 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 6026 transitions. Word has length 74 [2023-12-02 19:57:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:57:03,372 INFO L495 AbstractCegarLoop]: Abstraction has 4109 states and 6026 transitions. [2023-12-02 19:57:03,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 19:57:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 6026 transitions. [2023-12-02 19:57:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 19:57:03,373 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:57:03,373 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:57:03,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:57:03,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:57:03,576 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:57:03,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:57:03,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2066319716, now seen corresponding path program 1 times [2023-12-02 19:57:03,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:57:03,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913737996] [2023-12-02 19:57:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:03,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:57:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:57:03,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:57:03,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913737996] [2023-12-02 19:57:03,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913737996] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:57:03,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:57:03,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:57:03,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691067114] [2023-12-02 19:57:03,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:57:03,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:57:03,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:57:03,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:57:03,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:57:03,665 INFO L87 Difference]: Start difference. First operand 4109 states and 6026 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 19:57:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:57:03,741 INFO L93 Difference]: Finished difference Result 9491 states and 13964 transitions. [2023-12-02 19:57:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:57:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 19:57:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:57:03,771 INFO L225 Difference]: With dead ends: 9491 [2023-12-02 19:57:03,771 INFO L226 Difference]: Without dead ends: 5448 [2023-12-02 19:57:03,776 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 19:57:03,777 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 80 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:57:03,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 245 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:57:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2023-12-02 19:57:03,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 5446. [2023-12-02 19:57:03,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5446 states, 5445 states have (on average 1.458953168044077) internal successors, (7944), 5445 states have internal predecessors, (7944), 0 states have call successors, (0), 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 19:57:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5446 states to 5446 states and 7944 transitions. [2023-12-02 19:57:03,937 INFO L78 Accepts]: Start accepts. Automaton has 5446 states and 7944 transitions. Word has length 75 [2023-12-02 19:57:03,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:57:03,937 INFO L495 AbstractCegarLoop]: Abstraction has 5446 states and 7944 transitions. [2023-12-02 19:57:03,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 19:57:03,937 INFO L276 IsEmpty]: Start isEmpty. Operand 5446 states and 7944 transitions. [2023-12-02 19:57:03,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 19:57:03,938 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:57:03,938 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:57:03,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 19:57:03,939 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:57:03,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:57:03,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1452528593, now seen corresponding path program 1 times [2023-12-02 19:57:03,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:57:03,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713530217] [2023-12-02 19:57:03,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:03,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:57:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:57:04,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:57:04,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713530217] [2023-12-02 19:57:04,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713530217] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:57:04,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177384612] [2023-12-02 19:57:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:04,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:57:04,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:57:04,842 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:57:04,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:57:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:04,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 19:57:04,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:57:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 19:57:05,446 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:57:05,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177384612] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:57:05,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:57:05,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2023-12-02 19:57:05,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627054007] [2023-12-02 19:57:05,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:57:05,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:57:05,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:57:05,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:57:05,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-12-02 19:57:05,448 INFO L87 Difference]: Start difference. First operand 5446 states and 7944 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 19:57:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:57:05,574 INFO L93 Difference]: Finished difference Result 15775 states and 22972 transitions. [2023-12-02 19:57:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:57:05,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 78 [2023-12-02 19:57:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:57:05,617 INFO L225 Difference]: With dead ends: 15775 [2023-12-02 19:57:05,617 INFO L226 Difference]: Without dead ends: 10376 [2023-12-02 19:57:05,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-12-02 19:57:05,626 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 315 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:57:05,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 320 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:57:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10376 states. [2023-12-02 19:57:05,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10376 to 10374. [2023-12-02 19:57:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10374 states, 10373 states have (on average 1.4448086378096983) internal successors, (14987), 10373 states have internal predecessors, (14987), 0 states have call successors, (0), 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 19:57:05,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10374 states to 10374 states and 14987 transitions. [2023-12-02 19:57:05,867 INFO L78 Accepts]: Start accepts. Automaton has 10374 states and 14987 transitions. Word has length 78 [2023-12-02 19:57:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:57:05,867 INFO L495 AbstractCegarLoop]: Abstraction has 10374 states and 14987 transitions. [2023-12-02 19:57:05,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 19:57:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 10374 states and 14987 transitions. [2023-12-02 19:57:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 19:57:05,869 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:57:05,869 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:57:05,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:57:06,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 19:57:06,070 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:57:06,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:57:06,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1836727485, now seen corresponding path program 1 times [2023-12-02 19:57:06,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:57:06,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308223030] [2023-12-02 19:57:06,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:06,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:57:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 19:57:06,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:57:06,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308223030] [2023-12-02 19:57:06,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308223030] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:57:06,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:57:06,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:57:06,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29391083] [2023-12-02 19:57:06,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:57:06,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:57:06,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:57:06,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:57:06,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:57:06,143 INFO L87 Difference]: Start difference. First operand 10374 states and 14987 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 19:57:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:57:06,239 INFO L93 Difference]: Finished difference Result 24494 states and 35551 transitions. [2023-12-02 19:57:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:57:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 79 [2023-12-02 19:57:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:57:06,266 INFO L225 Difference]: With dead ends: 24494 [2023-12-02 19:57:06,266 INFO L226 Difference]: Without dead ends: 14162 [2023-12-02 19:57:06,279 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 19:57:06,280 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 92 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:57:06,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 245 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:57:06,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14162 states. [2023-12-02 19:57:06,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14162 to 14160. [2023-12-02 19:57:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14160 states, 14159 states have (on average 1.4354827318313441) internal successors, (20325), 14159 states have internal predecessors, (20325), 0 states have call successors, (0), 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 19:57:06,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14160 states to 14160 states and 20325 transitions. [2023-12-02 19:57:06,578 INFO L78 Accepts]: Start accepts. Automaton has 14160 states and 20325 transitions. Word has length 79 [2023-12-02 19:57:06,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:57:06,579 INFO L495 AbstractCegarLoop]: Abstraction has 14160 states and 20325 transitions. [2023-12-02 19:57:06,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 19:57:06,579 INFO L276 IsEmpty]: Start isEmpty. Operand 14160 states and 20325 transitions. [2023-12-02 19:57:06,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-02 19:57:06,581 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:57:06,581 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:57:06,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 19:57:06,581 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:57:06,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:57:06,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1798671364, now seen corresponding path program 1 times [2023-12-02 19:57:06,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:57:06,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909793012] [2023-12-02 19:57:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:06,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:57:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:57:07,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:57:07,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909793012] [2023-12-02 19:57:07,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909793012] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:57:07,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258435644] [2023-12-02 19:57:07,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:07,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:57:07,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:57:07,428 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:57:07,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:57:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:07,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 19:57:07,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:57:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 19:57:08,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:57:08,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258435644] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:57:08,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:57:08,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2023-12-02 19:57:08,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470041137] [2023-12-02 19:57:08,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:57:08,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:57:08,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:57:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:57:08,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-12-02 19:57:08,149 INFO L87 Difference]: Start difference. First operand 14160 states and 20325 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 19:57:08,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:57:08,318 INFO L93 Difference]: Finished difference Result 41222 states and 59015 transitions. [2023-12-02 19:57:08,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:57:08,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 82 [2023-12-02 19:57:08,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:57:08,370 INFO L225 Difference]: With dead ends: 41222 [2023-12-02 19:57:08,371 INFO L226 Difference]: Without dead ends: 27142 [2023-12-02 19:57:08,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-12-02 19:57:08,390 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 302 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:57:08,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 322 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:57:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27142 states. [2023-12-02 19:57:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27142 to 27140. [2023-12-02 19:57:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27140 states, 27139 states have (on average 1.4211651129371017) internal successors, (38569), 27139 states have internal predecessors, (38569), 0 states have call successors, (0), 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 19:57:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27140 states to 27140 states and 38569 transitions. [2023-12-02 19:57:08,842 INFO L78 Accepts]: Start accepts. Automaton has 27140 states and 38569 transitions. Word has length 82 [2023-12-02 19:57:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:57:08,842 INFO L495 AbstractCegarLoop]: Abstraction has 27140 states and 38569 transitions. [2023-12-02 19:57:08,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 19:57:08,843 INFO L276 IsEmpty]: Start isEmpty. Operand 27140 states and 38569 transitions. [2023-12-02 19:57:08,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 19:57:08,844 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:57:08,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:57:08,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 19:57:09,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 19:57:09,045 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:57:09,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:57:09,045 INFO L85 PathProgramCache]: Analyzing trace with hash 43944656, now seen corresponding path program 1 times [2023-12-02 19:57:09,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:57:09,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093561418] [2023-12-02 19:57:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:09,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:57:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 19:57:09,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:57:09,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093561418] [2023-12-02 19:57:09,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093561418] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:57:09,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:57:09,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:57:09,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398469223] [2023-12-02 19:57:09,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:57:09,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:57:09,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:57:09,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:57:09,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:57:09,102 INFO L87 Difference]: Start difference. First operand 27140 states and 38569 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:57:09,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:57:09,266 INFO L93 Difference]: Finished difference Result 63296 states and 90179 transitions. [2023-12-02 19:57:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:57:09,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2023-12-02 19:57:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:57:09,341 INFO L225 Difference]: With dead ends: 63296 [2023-12-02 19:57:09,341 INFO L226 Difference]: Without dead ends: 36226 [2023-12-02 19:57:09,369 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 19:57:09,369 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 82 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:57:09,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 248 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:57:09,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36226 states. [2023-12-02 19:57:09,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36226 to 36224. [2023-12-02 19:57:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36224 states, 36223 states have (on average 1.4087458244761615) internal successors, (51029), 36223 states have internal predecessors, (51029), 0 states have call successors, (0), 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 19:57:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36224 states to 36224 states and 51029 transitions. [2023-12-02 19:57:10,056 INFO L78 Accepts]: Start accepts. Automaton has 36224 states and 51029 transitions. Word has length 83 [2023-12-02 19:57:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:57:10,057 INFO L495 AbstractCegarLoop]: Abstraction has 36224 states and 51029 transitions. [2023-12-02 19:57:10,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:57:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 36224 states and 51029 transitions. [2023-12-02 19:57:10,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 19:57:10,059 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:57:10,059 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:57:10,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 19:57:10,060 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:57:10,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:57:10,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1491599806, now seen corresponding path program 1 times [2023-12-02 19:57:10,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:57:10,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543704362] [2023-12-02 19:57:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:10,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:57:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 19:57:10,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:57:10,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543704362] [2023-12-02 19:57:10,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543704362] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:57:10,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:57:10,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:57:10,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249215283] [2023-12-02 19:57:10,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:57:10,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:57:10,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:57:10,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:57:10,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:57:10,214 INFO L87 Difference]: Start difference. First operand 36224 states and 51029 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 19:57:10,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:57:10,516 INFO L93 Difference]: Finished difference Result 72382 states and 101980 transitions. [2023-12-02 19:57:10,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:57:10,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 86 [2023-12-02 19:57:10,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:57:10,624 INFO L225 Difference]: With dead ends: 72382 [2023-12-02 19:57:10,624 INFO L226 Difference]: Without dead ends: 36224 [2023-12-02 19:57:10,634 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 19:57:10,635 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 317 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:57:10,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 118 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:57:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36224 states. [2023-12-02 19:57:10,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36224 to 36224. [2023-12-02 19:57:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36224 states, 36223 states have (on average 1.3904149297407724) internal successors, (50365), 36223 states have internal predecessors, (50365), 0 states have call successors, (0), 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 19:57:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36224 states to 36224 states and 50365 transitions. [2023-12-02 19:57:10,968 INFO L78 Accepts]: Start accepts. Automaton has 36224 states and 50365 transitions. Word has length 86 [2023-12-02 19:57:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:57:10,968 INFO L495 AbstractCegarLoop]: Abstraction has 36224 states and 50365 transitions. [2023-12-02 19:57:10,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 19:57:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 36224 states and 50365 transitions. [2023-12-02 19:57:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 19:57:10,971 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:57:10,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:57:10,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 19:57:10,971 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:57:10,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:57:10,972 INFO L85 PathProgramCache]: Analyzing trace with hash -149086823, now seen corresponding path program 1 times [2023-12-02 19:57:10,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:57:10,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571896328] [2023-12-02 19:57:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:10,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:57:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:57:12,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:57:12,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571896328] [2023-12-02 19:57:12,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571896328] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:57:12,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467418012] [2023-12-02 19:57:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:12,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:57:12,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:57:12,013 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:57:12,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:57:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:12,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 19:57:12,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:57:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 19:57:13,221 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:57:13,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467418012] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:57:13,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:57:13,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2023-12-02 19:57:13,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962660133] [2023-12-02 19:57:13,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:57:13,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:57:13,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:57:13,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:57:13,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-12-02 19:57:13,223 INFO L87 Difference]: Start difference. First operand 36224 states and 50365 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 19:57:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:57:13,403 INFO L93 Difference]: Finished difference Result 63974 states and 88772 transitions. [2023-12-02 19:57:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:57:13,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 86 [2023-12-02 19:57:13,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:57:13,425 INFO L225 Difference]: With dead ends: 63974 [2023-12-02 19:57:13,425 INFO L226 Difference]: Without dead ends: 27841 [2023-12-02 19:57:13,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-12-02 19:57:13,440 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 417 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:57:13,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 252 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:57:13,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27841 states. [2023-12-02 19:57:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27841 to 27838. [2023-12-02 19:57:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27838 states, 27837 states have (on average 1.3833746452563136) internal successors, (38509), 27837 states have internal predecessors, (38509), 0 states have call successors, (0), 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 19:57:13,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27838 states to 27838 states and 38509 transitions. [2023-12-02 19:57:13,743 INFO L78 Accepts]: Start accepts. Automaton has 27838 states and 38509 transitions. Word has length 86 [2023-12-02 19:57:13,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:57:13,744 INFO L495 AbstractCegarLoop]: Abstraction has 27838 states and 38509 transitions. [2023-12-02 19:57:13,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 19:57:13,744 INFO L276 IsEmpty]: Start isEmpty. Operand 27838 states and 38509 transitions. [2023-12-02 19:57:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 19:57:13,745 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:57:13,745 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:57:13,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:57:13,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 19:57:13,946 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:57:13,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:57:13,946 INFO L85 PathProgramCache]: Analyzing trace with hash -217677866, now seen corresponding path program 1 times [2023-12-02 19:57:13,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:57:13,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528146100] [2023-12-02 19:57:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:13,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:57:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:57:14,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:57:14,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528146100] [2023-12-02 19:57:14,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528146100] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:57:14,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230136373] [2023-12-02 19:57:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:57:14,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:57:14,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:57:14,635 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:57:14,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9037108-3e47-4482-8baf-cc25f8ba951d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:57:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:57:14,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 19:57:14,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:57:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:57:16,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:57:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:57:19,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230136373] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:57:19,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [823179231] [2023-12-02 19:57:19,598 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-12-02 19:57:19,599 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:57:19,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:57:19,605 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:57:19,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:57:21,740 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-12-02 19:57:27,683 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 262144 conjunctions. This might take some time...