./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/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_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/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_8ae41523-fb11-4ebd-97b8-c13725d28b15/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 a7994e4b0bfbe275d233e5a25c7b22888e2d55ba388328f1fc4435f77ac9412d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:43:14,613 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:43:14,683 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:43:14,688 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:43:14,689 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:43:14,716 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:43:14,717 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:43:14,718 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:43:14,719 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:43:14,719 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:43:14,720 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:43:14,720 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:43:14,721 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:43:14,721 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:43:14,722 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:43:14,722 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:43:14,723 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:43:14,723 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:43:14,724 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:43:14,725 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:43:14,725 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:43:14,726 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:43:14,727 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:43:14,727 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:43:14,728 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:43:14,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:43:14,728 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:43:14,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:43:14,729 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:43:14,730 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:43:14,730 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:43:14,731 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:43:14,731 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:43:14,732 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:43:14,732 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:43:14,733 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:43:14,733 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:43:14,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:43:14,734 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:43:14,734 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:43:14,734 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:43:14,735 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:43:14,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:43:14,735 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:43:14,735 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:43:14,736 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:43:14,736 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:43:14,736 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_8ae41523-fb11-4ebd-97b8-c13725d28b15/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7994e4b0bfbe275d233e5a25c7b22888e2d55ba388328f1fc4435f77ac9412d [2023-12-02 18:43:14,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:43:15,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:43:15,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:43:15,012 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:43:15,012 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:43:15,013 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-02 18:43:18,176 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:43:18,406 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:43:18,407 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-02 18:43:18,419 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/data/bb4b2283e/6812e13596ba4bc4bd4d8d11782c51b9/FLAG974a98bb9 [2023-12-02 18:43:18,433 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/data/bb4b2283e/6812e13596ba4bc4bd4d8d11782c51b9 [2023-12-02 18:43:18,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:43:18,438 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:43:18,440 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:43:18,440 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:43:18,446 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:43:18,447 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:43:18" (1/1) ... [2023-12-02 18:43:18,449 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15fac10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:18, skipping insertion in model container [2023-12-02 18:43:18,449 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:43:18" (1/1) ... [2023-12-02 18:43:18,498 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:43:18,727 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_8ae41523-fb11-4ebd-97b8-c13725d28b15/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4409,4422] [2023-12-02 18:43:18,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:43:18,775 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:43:18,814 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_8ae41523-fb11-4ebd-97b8-c13725d28b15/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4409,4422] [2023-12-02 18:43:18,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:43:18,852 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:43:18,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:18 WrapperNode [2023-12-02 18:43:18,853 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:43:18,855 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:43:18,855 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:43:18,855 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:43:18,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:18" (1/1) ... [2023-12-02 18:43:18,878 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:18" (1/1) ... [2023-12-02 18:43:18,913 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 355 [2023-12-02 18:43:18,914 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:43:18,915 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:43:18,915 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:43:18,915 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:43:18,927 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:18" (1/1) ... [2023-12-02 18:43:18,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:18" (1/1) ... [2023-12-02 18:43:18,931 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:18" (1/1) ... [2023-12-02 18:43:18,932 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:18" (1/1) ... [2023-12-02 18:43:18,941 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:18" (1/1) ... [2023-12-02 18:43:18,945 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:18" (1/1) ... [2023-12-02 18:43:18,948 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:18" (1/1) ... [2023-12-02 18:43:18,951 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:18" (1/1) ... [2023-12-02 18:43:18,956 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:43:18,957 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:43:18,957 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:43:18,958 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:43:18,959 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:18" (1/1) ... [2023-12-02 18:43:18,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:43:18,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:19,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:43:19,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:43:19,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:43:19,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:43:19,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:43:19,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:43:19,184 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:43:19,187 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:43:19,557 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:43:19,695 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:43:19,695 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 18:43:19,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:43:19 BoogieIcfgContainer [2023-12-02 18:43:19,697 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:43:19,701 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:43:19,701 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:43:19,705 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:43:19,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:43:18" (1/3) ... [2023-12-02 18:43:19,707 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fb100b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:43:19, skipping insertion in model container [2023-12-02 18:43:19,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:18" (2/3) ... [2023-12-02 18:43:19,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fb100b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:43:19, skipping insertion in model container [2023-12-02 18:43:19,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:43:19" (3/3) ... [2023-12-02 18:43:19,712 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-12-02 18:43:19,732 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:43:19,732 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:43:19,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:43:19,791 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;@3961892a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:43:19,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:43:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 63 states have internal predecessors, (103), 0 states have call successors, (0), 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 18:43:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 18:43:19,804 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:19,804 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] [2023-12-02 18:43:19,805 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:43:19,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:19,810 INFO L85 PathProgramCache]: Analyzing trace with hash 262034080, now seen corresponding path program 1 times [2023-12-02 18:43:19,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:19,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113407252] [2023-12-02 18:43:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:19,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:20,139 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 18:43:20,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:20,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113407252] [2023-12-02 18:43:20,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113407252] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:20,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:20,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:43:20,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247013089] [2023-12-02 18:43:20,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:20,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:43:20,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:20,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:43:20,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:43:20,184 INFO L87 Difference]: Start difference. First operand has 64 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 63 states have internal predecessors, (103), 0 states have call successors, (0), 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 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 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 18:43:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:20,258 INFO L93 Difference]: Finished difference Result 143 states and 218 transitions. [2023-12-02 18:43:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:43:20,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2023-12-02 18:43:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:20,271 INFO L225 Difference]: With dead ends: 143 [2023-12-02 18:43:20,271 INFO L226 Difference]: Without dead ends: 94 [2023-12-02 18:43:20,274 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 18:43:20,279 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 188 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 18:43:20,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 188 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:43:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-02 18:43:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2023-12-02 18:43:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.4065934065934067) internal successors, (128), 91 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:43:20,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 128 transitions. [2023-12-02 18:43:20,325 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 128 transitions. Word has length 28 [2023-12-02 18:43:20,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:20,326 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 128 transitions. [2023-12-02 18:43:20,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 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 18:43:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 128 transitions. [2023-12-02 18:43:20,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 18:43:20,328 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:20,328 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] [2023-12-02 18:43:20,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:43:20,329 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:43:20,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:20,330 INFO L85 PathProgramCache]: Analyzing trace with hash -297391458, now seen corresponding path program 1 times [2023-12-02 18:43:20,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:20,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397778280] [2023-12-02 18:43:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:20,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:20,451 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 18:43:20,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:20,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397778280] [2023-12-02 18:43:20,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397778280] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:20,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:20,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:43:20,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650143174] [2023-12-02 18:43:20,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:20,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:43:20,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:20,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:43:20,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:43:20,456 INFO L87 Difference]: Start difference. First operand 92 states and 128 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 18:43:20,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:20,502 INFO L93 Difference]: Finished difference Result 216 states and 312 transitions. [2023-12-02 18:43:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:43:20,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2023-12-02 18:43:20,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:20,505 INFO L225 Difference]: With dead ends: 216 [2023-12-02 18:43:20,505 INFO L226 Difference]: Without dead ends: 143 [2023-12-02 18:43:20,506 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 18:43:20,508 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 56 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:20,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 150 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:43:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-12-02 18:43:20,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2023-12-02 18:43:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.4285714285714286) internal successors, (200), 140 states have internal predecessors, (200), 0 states have call successors, (0), 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 18:43:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 200 transitions. [2023-12-02 18:43:20,526 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 200 transitions. Word has length 31 [2023-12-02 18:43:20,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:20,527 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 200 transitions. [2023-12-02 18:43:20,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 18:43:20,527 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 200 transitions. [2023-12-02 18:43:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 18:43:20,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:20,529 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] [2023-12-02 18:43:20,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:43:20,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:43:20,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:20,530 INFO L85 PathProgramCache]: Analyzing trace with hash -843010126, now seen corresponding path program 1 times [2023-12-02 18:43:20,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:20,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346788484] [2023-12-02 18:43:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:20,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:20,639 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 18:43:20,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:20,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346788484] [2023-12-02 18:43:20,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346788484] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:20,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:20,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:43:20,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33073635] [2023-12-02 18:43:20,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:20,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:43:20,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:20,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:43:20,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:43:20,643 INFO L87 Difference]: Start difference. First operand 141 states and 200 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 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 18:43:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:20,683 INFO L93 Difference]: Finished difference Result 341 states and 494 transitions. [2023-12-02 18:43:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:43:20,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2023-12-02 18:43:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:20,688 INFO L225 Difference]: With dead ends: 341 [2023-12-02 18:43:20,688 INFO L226 Difference]: Without dead ends: 219 [2023-12-02 18:43:20,689 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 18:43:20,691 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 51 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:20,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 135 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:43:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-12-02 18:43:20,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2023-12-02 18:43:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4259259259259258) internal successors, (308), 216 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:43:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 308 transitions. [2023-12-02 18:43:20,710 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 308 transitions. Word has length 34 [2023-12-02 18:43:20,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:20,710 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 308 transitions. [2023-12-02 18:43:20,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 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 18:43:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 308 transitions. [2023-12-02 18:43:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 18:43:20,712 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:20,712 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] [2023-12-02 18:43:20,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:43:20,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:43:20,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:20,713 INFO L85 PathProgramCache]: Analyzing trace with hash 853936617, now seen corresponding path program 1 times [2023-12-02 18:43:20,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:20,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728239574] [2023-12-02 18:43:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:20,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:20,879 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 18:43:20,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:20,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728239574] [2023-12-02 18:43:20,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728239574] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:20,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:20,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:43:20,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465281594] [2023-12-02 18:43:20,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:20,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:43:20,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:43:20,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:43:20,882 INFO L87 Difference]: Start difference. First operand 217 states and 308 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 18:43:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:20,965 INFO L93 Difference]: Finished difference Result 703 states and 1007 transitions. [2023-12-02 18:43:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:43:20,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2023-12-02 18:43:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:20,970 INFO L225 Difference]: With dead ends: 703 [2023-12-02 18:43:20,970 INFO L226 Difference]: Without dead ends: 505 [2023-12-02 18:43:20,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:43:20,974 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 162 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:20,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 267 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:43:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-12-02 18:43:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 501. [2023-12-02 18:43:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.424) internal successors, (712), 500 states have internal predecessors, (712), 0 states have call successors, (0), 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 18:43:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 712 transitions. [2023-12-02 18:43:21,008 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 712 transitions. Word has length 37 [2023-12-02 18:43:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:21,008 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 712 transitions. [2023-12-02 18:43:21,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 18:43:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 712 transitions. [2023-12-02 18:43:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 18:43:21,010 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:21,011 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] [2023-12-02 18:43:21,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 18:43:21,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:43:21,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:21,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1593970368, now seen corresponding path program 1 times [2023-12-02 18:43:21,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:21,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270455357] [2023-12-02 18:43:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:21,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:21,125 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 18:43:21,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:21,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270455357] [2023-12-02 18:43:21,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270455357] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:21,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:21,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:43:21,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749596156] [2023-12-02 18:43:21,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:21,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:43:21,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:21,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:43:21,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:43:21,128 INFO L87 Difference]: Start difference. First operand 501 states and 712 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 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 18:43:21,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:21,286 INFO L93 Difference]: Finished difference Result 1283 states and 1846 transitions. [2023-12-02 18:43:21,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:43:21,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2023-12-02 18:43:21,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:21,293 INFO L225 Difference]: With dead ends: 1283 [2023-12-02 18:43:21,293 INFO L226 Difference]: Without dead ends: 801 [2023-12-02 18:43:21,295 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 18:43:21,297 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 336 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:21,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 82 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:43:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2023-12-02 18:43:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 799. [2023-12-02 18:43:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 1.418546365914787) internal successors, (1132), 798 states have internal predecessors, (1132), 0 states have call successors, (0), 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 18:43:21,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1132 transitions. [2023-12-02 18:43:21,361 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1132 transitions. Word has length 39 [2023-12-02 18:43:21,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:21,362 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1132 transitions. [2023-12-02 18:43:21,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 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 18:43:21,362 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1132 transitions. [2023-12-02 18:43:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 18:43:21,364 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:21,364 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] [2023-12-02 18:43:21,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 18:43:21,365 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:43:21,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:21,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2077146171, now seen corresponding path program 1 times [2023-12-02 18:43:21,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:21,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932358495] [2023-12-02 18:43:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:21,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:21,814 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 18:43:21,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:21,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932358495] [2023-12-02 18:43:21,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932358495] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:21,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:21,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:43:21,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203179836] [2023-12-02 18:43:21,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:21,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:43:21,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:21,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:43:21,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:43:21,817 INFO L87 Difference]: Start difference. First operand 799 states and 1132 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 18:43:22,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:22,046 INFO L93 Difference]: Finished difference Result 1478 states and 2095 transitions. [2023-12-02 18:43:22,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 18:43:22,046 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2023-12-02 18:43:22,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:22,055 INFO L225 Difference]: With dead ends: 1478 [2023-12-02 18:43:22,056 INFO L226 Difference]: Without dead ends: 1476 [2023-12-02 18:43:22,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-12-02 18:43:22,057 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 461 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:22,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 692 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:43:22,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2023-12-02 18:43:22,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 936. [2023-12-02 18:43:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.4171122994652405) internal successors, (1325), 935 states have internal predecessors, (1325), 0 states have call successors, (0), 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 18:43:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1325 transitions. [2023-12-02 18:43:22,097 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1325 transitions. Word has length 39 [2023-12-02 18:43:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:22,098 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1325 transitions. [2023-12-02 18:43:22,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 18:43:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1325 transitions. [2023-12-02 18:43:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 18:43:22,101 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:22,101 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:43:22,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 18:43:22,101 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:43:22,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:22,102 INFO L85 PathProgramCache]: Analyzing trace with hash -785035865, now seen corresponding path program 1 times [2023-12-02 18:43:22,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:22,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802435827] [2023-12-02 18:43:22,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:22,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:43:23,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:23,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802435827] [2023-12-02 18:43:23,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802435827] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:43:23,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834903769] [2023-12-02 18:43:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:23,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:23,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:23,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:23,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:43:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:23,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-02 18:43:23,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:43:25,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:43:30,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834903769] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:30,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [12766661] [2023-12-02 18:43:30,466 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-12-02 18:43:30,467 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:43:30,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:43:30,477 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:43:30,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:43:57,302 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:44:06,658 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7277#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~__return_6431~0 1) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= ~mode1~0 1) (<= 0 ~__return_6431~0) (<= 0 ~mode2~0) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|))' at error location [2023-12-02 18:44:06,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:44:06,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:44:06,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 41 [2023-12-02 18:44:06,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362369935] [2023-12-02 18:44:06,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:44:06,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-02 18:44:06,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:44:06,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-02 18:44:06,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=833, Invalid=5173, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 18:44:06,665 INFO L87 Difference]: Start difference. First operand 936 states and 1325 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 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 18:44:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:31,748 INFO L93 Difference]: Finished difference Result 10981 states and 15508 transitions. [2023-12-02 18:44:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2023-12-02 18:44:31,749 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 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 18:44:31,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:31,795 INFO L225 Difference]: With dead ends: 10981 [2023-12-02 18:44:31,795 INFO L226 Difference]: Without dead ends: 10092 [2023-12-02 18:44:31,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25852 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=9603, Invalid=51159, Unknown=0, NotChecked=0, Total=60762 [2023-12-02 18:44:31,814 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 6979 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 3228 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6979 SdHoareTripleChecker+Valid, 2325 SdHoareTripleChecker+Invalid, 3645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 3228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:31,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6979 Valid, 2325 Invalid, 3645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 3228 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-02 18:44:31,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10092 states. [2023-12-02 18:44:31,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10092 to 4591. [2023-12-02 18:44:31,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 1.3775599128540306) internal successors, (6323), 4590 states have internal predecessors, (6323), 0 states have call successors, (0), 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 18:44:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 6323 transitions. [2023-12-02 18:44:31,981 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 6323 transitions. Word has length 47 [2023-12-02 18:44:31,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:31,982 INFO L495 AbstractCegarLoop]: Abstraction has 4591 states and 6323 transitions. [2023-12-02 18:44:31,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 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 18:44:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 6323 transitions. [2023-12-02 18:44:31,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 18:44:31,984 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:31,984 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:44:31,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:44:32,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:32,185 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:44:32,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:32,186 INFO L85 PathProgramCache]: Analyzing trace with hash 360587774, now seen corresponding path program 1 times [2023-12-02 18:44:32,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:44:32,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624258029] [2023-12-02 18:44:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:32,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:44:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:44:32,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:44:32,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624258029] [2023-12-02 18:44:32,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624258029] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:44:32,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:44:32,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:44:32,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254416723] [2023-12-02 18:44:32,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:44:32,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:44:32,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:44:32,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:44:32,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:44:32,272 INFO L87 Difference]: Start difference. First operand 4591 states and 6323 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 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 18:44:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:32,404 INFO L93 Difference]: Finished difference Result 11576 states and 16083 transitions. [2023-12-02 18:44:32,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:44:32,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 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 47 [2023-12-02 18:44:32,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:32,434 INFO L225 Difference]: With dead ends: 11576 [2023-12-02 18:44:32,434 INFO L226 Difference]: Without dead ends: 7054 [2023-12-02 18:44:32,439 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 18:44:32,440 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 317 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:32,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 92 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:44:32,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7054 states. [2023-12-02 18:44:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7054 to 7052. [2023-12-02 18:44:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7051 states have (on average 1.377109629839739) internal successors, (9710), 7051 states have internal predecessors, (9710), 0 states have call successors, (0), 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 18:44:32,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 9710 transitions. [2023-12-02 18:44:32,564 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 9710 transitions. Word has length 47 [2023-12-02 18:44:32,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:32,564 INFO L495 AbstractCegarLoop]: Abstraction has 7052 states and 9710 transitions. [2023-12-02 18:44:32,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 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 18:44:32,564 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 9710 transitions. [2023-12-02 18:44:32,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 18:44:32,565 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:32,566 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:44:32,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 18:44:32,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:44:32,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:32,567 INFO L85 PathProgramCache]: Analyzing trace with hash -453824221, now seen corresponding path program 1 times [2023-12-02 18:44:32,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:44:32,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377853247] [2023-12-02 18:44:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:32,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:44:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:44:33,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:44:33,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377853247] [2023-12-02 18:44:33,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377853247] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:44:33,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723759112] [2023-12-02 18:44:33,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:33,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:33,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:44:33,281 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:44:33,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:44:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:33,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-02 18:44:33,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:44:34,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:44:38,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723759112] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:38,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22246944] [2023-12-02 18:44:38,928 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-12-02 18:44:38,928 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:44:38,929 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:44:38,929 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:44:38,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:45:01,880 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:45:10,932 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42178#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~__return_6431~0 1) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 ~__return_6431~0) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|))' at error location [2023-12-02 18:45:10,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:45:10,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:45:10,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 41 [2023-12-02 18:45:10,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20184942] [2023-12-02 18:45:10,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:45:10,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-02 18:45:10,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:45:10,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-02 18:45:10,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=5171, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 18:45:10,936 INFO L87 Difference]: Start difference. First operand 7052 states and 9710 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 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 18:45:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:45:35,522 INFO L93 Difference]: Finished difference Result 38247 states and 52661 transitions. [2023-12-02 18:45:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2023-12-02 18:45:35,523 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 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 18:45:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:45:35,604 INFO L225 Difference]: With dead ends: 38247 [2023-12-02 18:45:35,604 INFO L226 Difference]: Without dead ends: 29755 [2023-12-02 18:45:35,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23610 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=8317, Invalid=47143, Unknown=0, NotChecked=0, Total=55460 [2023-12-02 18:45:35,619 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 6401 mSDsluCounter, 2675 mSDsCounter, 0 mSdLazyCounter, 4268 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6401 SdHoareTripleChecker+Valid, 2843 SdHoareTripleChecker+Invalid, 4603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 4268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:45:35,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6401 Valid, 2843 Invalid, 4603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 4268 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-12-02 18:45:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29755 states. [2023-12-02 18:45:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29755 to 18361. [2023-12-02 18:45:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18361 states, 18360 states have (on average 1.360239651416122) internal successors, (24974), 18360 states have internal predecessors, (24974), 0 states have call successors, (0), 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 18:45:36,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18361 states to 18361 states and 24974 transitions. [2023-12-02 18:45:36,092 INFO L78 Accepts]: Start accepts. Automaton has 18361 states and 24974 transitions. Word has length 47 [2023-12-02 18:45:36,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:45:36,092 INFO L495 AbstractCegarLoop]: Abstraction has 18361 states and 24974 transitions. [2023-12-02 18:45:36,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 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 18:45:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 18361 states and 24974 transitions. [2023-12-02 18:45:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 18:45:36,094 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:45:36,095 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:45:36,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:45:36,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:45:36,295 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:45:36,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:45:36,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1366437830, now seen corresponding path program 1 times [2023-12-02 18:45:36,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:45:36,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882344315] [2023-12-02 18:45:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:45:36,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:45:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:45:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:45:36,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:45:36,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882344315] [2023-12-02 18:45:36,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882344315] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:45:36,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:45:36,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:45:36,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896874752] [2023-12-02 18:45:36,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:45:36,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:45:36,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:45:36,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:45:36,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:45:36,402 INFO L87 Difference]: Start difference. First operand 18361 states and 24974 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 18:45:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:45:36,596 INFO L93 Difference]: Finished difference Result 44771 states and 61251 transitions. [2023-12-02 18:45:36,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:45:36,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 18:45:36,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:45:36,636 INFO L225 Difference]: With dead ends: 44771 [2023-12-02 18:45:36,636 INFO L226 Difference]: Without dead ends: 26514 [2023-12-02 18:45:36,658 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 18:45:36,659 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 292 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:45:36,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 102 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:45:36,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26514 states. [2023-12-02 18:45:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26514 to 26394. [2023-12-02 18:45:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26394 states, 26393 states have (on average 1.3572538173000417) internal successors, (35822), 26393 states have internal predecessors, (35822), 0 states have call successors, (0), 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 18:45:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26394 states to 26394 states and 35822 transitions. [2023-12-02 18:45:37,075 INFO L78 Accepts]: Start accepts. Automaton has 26394 states and 35822 transitions. Word has length 49 [2023-12-02 18:45:37,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:45:37,075 INFO L495 AbstractCegarLoop]: Abstraction has 26394 states and 35822 transitions. [2023-12-02 18:45:37,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 18:45:37,076 INFO L276 IsEmpty]: Start isEmpty. Operand 26394 states and 35822 transitions. [2023-12-02 18:45:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 18:45:37,077 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:45:37,078 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:45:37,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 18:45:37,078 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:45:37,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:45:37,079 INFO L85 PathProgramCache]: Analyzing trace with hash 259726837, now seen corresponding path program 1 times [2023-12-02 18:45:37,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:45:37,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692273866] [2023-12-02 18:45:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:45:37,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:45:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:45:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:45:38,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:45:38,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692273866] [2023-12-02 18:45:38,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692273866] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:45:38,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590555182] [2023-12-02 18:45:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:45:38,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:45:38,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:45:38,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:45:38,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:45:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:45:38,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 18:45:38,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:45:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:45:39,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:45:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:45:44,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590555182] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:45:44,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1892125328] [2023-12-02 18:45:44,481 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-12-02 18:45:44,481 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:45:44,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:45:44,482 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:45:44,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:45:47,343 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-12-02 18:45:47,357 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-12-02 18:46:21,174 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:46:29,735 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '170642#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~__return_6431~0 1) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 ~__return_6431~0) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|))' at error location [2023-12-02 18:46:29,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:46:29,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:46:29,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 41 [2023-12-02 18:46:29,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353199421] [2023-12-02 18:46:29,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:46:29,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-02 18:46:29,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:46:29,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-02 18:46:29,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=808, Invalid=5354, Unknown=0, NotChecked=0, Total=6162 [2023-12-02 18:46:29,738 INFO L87 Difference]: Start difference. First operand 26394 states and 35822 transitions. Second operand has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 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 18:46:59,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:46:59,583 INFO L93 Difference]: Finished difference Result 92767 states and 125860 transitions. [2023-12-02 18:46:59,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2023-12-02 18:46:59,584 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 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 18:46:59,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:46:59,671 INFO L225 Difference]: With dead ends: 92767 [2023-12-02 18:46:59,671 INFO L226 Difference]: Without dead ends: 80934 [2023-12-02 18:46:59,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32642 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=10671, Invalid=64679, Unknown=0, NotChecked=0, Total=75350 [2023-12-02 18:46:59,695 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 6024 mSDsluCounter, 3748 mSDsCounter, 0 mSdLazyCounter, 4940 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6024 SdHoareTripleChecker+Valid, 3997 SdHoareTripleChecker+Invalid, 5251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 4940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:46:59,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6024 Valid, 3997 Invalid, 5251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 4940 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-12-02 18:46:59,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80934 states. [2023-12-02 18:47:00,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80934 to 47475. [2023-12-02 18:47:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47475 states, 47474 states have (on average 1.3500863630618865) internal successors, (64094), 47474 states have internal predecessors, (64094), 0 states have call successors, (0), 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 18:47:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47475 states to 47475 states and 64094 transitions. [2023-12-02 18:47:00,369 INFO L78 Accepts]: Start accepts. Automaton has 47475 states and 64094 transitions. Word has length 49 [2023-12-02 18:47:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:47:00,369 INFO L495 AbstractCegarLoop]: Abstraction has 47475 states and 64094 transitions. [2023-12-02 18:47:00,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 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 18:47:00,370 INFO L276 IsEmpty]: Start isEmpty. Operand 47475 states and 64094 transitions. [2023-12-02 18:47:00,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 18:47:00,371 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:47:00,371 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:47:00,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:47:00,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:47:00,572 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:47:00,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:47:00,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1126111929, now seen corresponding path program 1 times [2023-12-02 18:47:00,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:47:00,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919012453] [2023-12-02 18:47:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:47:00,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:47:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:47:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:47:05,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:47:05,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919012453] [2023-12-02 18:47:05,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919012453] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:47:05,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651529733] [2023-12-02 18:47:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:47:05,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:47:05,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:47:05,711 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:47:05,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae41523-fb11-4ebd-97b8-c13725d28b15/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:47:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:47:05,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 82 conjunts are in the unsatisfiable core [2023-12-02 18:47:05,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:47:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:47:12,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:50:20,092 WARN L293 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 283 DAG size of output: 280 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:52:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:52:40,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651529733] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:52:40,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1532885574] [2023-12-02 18:52:40,329 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-12-02 18:52:40,329 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:52:40,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:52:40,330 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:52:40,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:52:55,674 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:53:10,190 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '311704#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= ~__return_6431~0 1) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= ~mode1~0 1) (<= 0 ~__return_6431~0) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|))' at error location [2023-12-02 18:53:10,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:53:10,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:53:10,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31, 32] total 90 [2023-12-02 18:53:10,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968534734] [2023-12-02 18:53:10,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:53:10,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-12-02 18:53:10,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:53:10,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-12-02 18:53:10,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=14230, Unknown=0, NotChecked=0, Total=16512 [2023-12-02 18:53:10,194 INFO L87 Difference]: Start difference. First operand 47475 states and 64094 transitions. Second operand has 90 states, 90 states have (on average 1.6777777777777778) internal successors, (151), 90 states have internal predecessors, (151), 0 states have call successors, (0), 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 18:53:31,578 WARN L293 SmtUtils]: Spent 19.16s on a formula simplification. DAG size of input: 848 DAG size of output: 381 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:53:48,153 WARN L293 SmtUtils]: Spent 15.59s on a formula simplification. DAG size of input: 849 DAG size of output: 331 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:54:00,507 WARN L293 SmtUtils]: Spent 11.48s on a formula simplification. DAG size of input: 850 DAG size of output: 246 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:54:13,003 WARN L293 SmtUtils]: Spent 11.54s on a formula simplification. DAG size of input: 864 DAG size of output: 189 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:54:24,493 WARN L293 SmtUtils]: Spent 10.54s on a formula simplification. DAG size of input: 865 DAG size of output: 159 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:54:33,393 WARN L293 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 867 DAG size of output: 120 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:54:42,376 WARN L293 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 843 DAG size of output: 118 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:54:51,200 WARN L293 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 845 DAG size of output: 117 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:54:59,797 WARN L293 SmtUtils]: Spent 7.85s on a formula simplification. DAG size of input: 847 DAG size of output: 100 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:55:06,036 WARN L293 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 633 DAG size of output: 100 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:55:12,666 WARN L293 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 666 DAG size of output: 96 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:55:41,643 WARN L293 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 575 DAG size of output: 88 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:56:00,600 WARN L293 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 645 DAG size of output: 100 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:56:47,737 WARN L293 SmtUtils]: Spent 38.24s on a formula simplification. DAG size of input: 1235 DAG size of output: 575 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:57:23,890 WARN L293 SmtUtils]: Spent 35.18s on a formula simplification. DAG size of input: 1111 DAG size of output: 536 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)