./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/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_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/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_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/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 bfae9982cbfcfc5b22127da3f7d6677e3eac54b1fbca7af42ac502541c03eb9a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:08:05,554 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:08:05,616 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:08:05,621 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:08:05,622 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:08:05,644 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:08:05,644 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:08:05,645 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:08:05,645 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:08:05,646 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:08:05,646 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:08:05,647 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:08:05,647 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:08:05,648 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:08:05,648 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:08:05,649 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:08:05,649 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:08:05,650 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:08:05,650 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:08:05,651 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:08:05,651 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:08:05,654 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:08:05,655 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:08:05,655 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:08:05,656 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:08:05,656 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:08:05,656 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:08:05,657 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:08:05,657 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:08:05,657 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:08:05,658 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:08:05,658 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:08:05,658 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:08:05,659 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:08:05,659 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:08:05,659 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:08:05,659 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:08:05,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:08:05,660 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:08:05,660 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:08:05,660 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:08:05,660 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:08:05,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:08:05,661 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:08:05,661 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:08:05,661 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:08:05,661 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:08:05,661 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_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfae9982cbfcfc5b22127da3f7d6677e3eac54b1fbca7af42ac502541c03eb9a [2023-12-02 19:08:05,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:08:05,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:08:05,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:08:05,911 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:08:05,912 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:08:05,913 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-12-02 19:08:08,607 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:08:08,846 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:08:08,846 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-12-02 19:08:08,863 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/data/caab89da4/53424273410d4455aa366873311f4faf/FLAGd03bee4f9 [2023-12-02 19:08:08,878 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/data/caab89da4/53424273410d4455aa366873311f4faf [2023-12-02 19:08:08,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:08:08,882 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:08:08,883 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:08:08,883 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:08:08,889 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:08:08,889 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:08:08" (1/1) ... [2023-12-02 19:08:08,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@104be098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:08:08, skipping insertion in model container [2023-12-02 19:08:08,891 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:08:08" (1/1) ... [2023-12-02 19:08:08,954 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:08:09,208 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_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13674,13687] [2023-12-02 19:08:09,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:08:09,339 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:08:09,421 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_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13674,13687] [2023-12-02 19:08:09,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:08:09,473 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:08:09,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:08:09 WrapperNode [2023-12-02 19:08:09,473 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:08:09,474 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:08:09,475 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:08:09,475 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:08:09,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:08:09" (1/1) ... [2023-12-02 19:08:09,498 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:08:09" (1/1) ... [2023-12-02 19:08:09,550 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1427 [2023-12-02 19:08:09,551 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:08:09,551 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:08:09,552 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:08:09,552 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:08:09,561 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:08:09" (1/1) ... [2023-12-02 19:08:09,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:08:09" (1/1) ... [2023-12-02 19:08:09,569 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:08:09" (1/1) ... [2023-12-02 19:08:09,569 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:08:09" (1/1) ... [2023-12-02 19:08:09,594 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:08:09" (1/1) ... [2023-12-02 19:08:09,604 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:08:09" (1/1) ... [2023-12-02 19:08:09,613 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:08:09" (1/1) ... [2023-12-02 19:08:09,621 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:08:09" (1/1) ... [2023-12-02 19:08:09,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:08:09,635 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:08:09,635 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:08:09,636 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:08:09,636 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:08:09" (1/1) ... [2023-12-02 19:08:09,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:08:09,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:08:09,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:08:09,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:08:09,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:08:09,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:08:09,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:08:09,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:08:09,860 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:08:09,862 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:08:10,809 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:08:11,106 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:08:11,106 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 19:08:11,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:08:11 BoogieIcfgContainer [2023-12-02 19:08:11,108 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:08:11,110 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:08:11,111 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:08:11,113 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:08:11,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:08:08" (1/3) ... [2023-12-02 19:08:11,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0699f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:08:11, skipping insertion in model container [2023-12-02 19:08:11,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:08:09" (2/3) ... [2023-12-02 19:08:11,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0699f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:08:11, skipping insertion in model container [2023-12-02 19:08:11,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:08:11" (3/3) ... [2023-12-02 19:08:11,116 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-12-02 19:08:11,130 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:08:11,130 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:08:11,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:08:11,183 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;@3bde668f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:08:11,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:08:11,189 INFO L276 IsEmpty]: Start isEmpty. Operand has 282 states, 273 states have (on average 1.695970695970696) internal successors, (463), 281 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:11,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 19:08:11,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:11,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:11,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:11,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:11,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1109442353, now seen corresponding path program 1 times [2023-12-02 19:08:11,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:11,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275413156] [2023-12-02 19:08:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:11,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:08:11,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:11,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275413156] [2023-12-02 19:08:11,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275413156] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:11,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:11,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:11,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593775189] [2023-12-02 19:08:11,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:11,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:11,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:11,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:11,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:11,712 INFO L87 Difference]: Start difference. First operand has 282 states, 273 states have (on average 1.695970695970696) internal successors, (463), 281 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:11,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:11,869 INFO L93 Difference]: Finished difference Result 490 states and 782 transitions. [2023-12-02 19:08:11,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:11,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2023-12-02 19:08:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:11,886 INFO L225 Difference]: With dead ends: 490 [2023-12-02 19:08:11,887 INFO L226 Difference]: Without dead ends: 358 [2023-12-02 19:08:11,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:11,894 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 180 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:11,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 942 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-12-02 19:08:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 356. [2023-12-02 19:08:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.5126760563380282) internal successors, (537), 355 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 537 transitions. [2023-12-02 19:08:11,955 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 537 transitions. Word has length 109 [2023-12-02 19:08:11,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:11,956 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 537 transitions. [2023-12-02 19:08:11,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:11,956 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 537 transitions. [2023-12-02 19:08:11,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-12-02 19:08:11,960 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:11,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:11,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:08:11,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:11,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:11,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1822219655, now seen corresponding path program 1 times [2023-12-02 19:08:11,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:11,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551565141] [2023-12-02 19:08:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:11,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:08:12,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:12,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551565141] [2023-12-02 19:08:12,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551565141] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:12,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:12,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:12,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260221627] [2023-12-02 19:08:12,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:12,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:12,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:12,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:12,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:12,177 INFO L87 Difference]: Start difference. First operand 356 states and 537 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:12,288 INFO L93 Difference]: Finished difference Result 650 states and 1001 transitions. [2023-12-02 19:08:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:12,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2023-12-02 19:08:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:12,293 INFO L225 Difference]: With dead ends: 650 [2023-12-02 19:08:12,293 INFO L226 Difference]: Without dead ends: 462 [2023-12-02 19:08:12,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:12,297 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 158 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:12,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 703 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-12-02 19:08:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2023-12-02 19:08:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.522875816993464) internal successors, (699), 459 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 699 transitions. [2023-12-02 19:08:12,322 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 699 transitions. Word has length 111 [2023-12-02 19:08:12,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:12,323 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 699 transitions. [2023-12-02 19:08:12,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:12,323 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 699 transitions. [2023-12-02 19:08:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 19:08:12,326 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:12,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:12,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:08:12,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:12,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:12,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1878223855, now seen corresponding path program 1 times [2023-12-02 19:08:12,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:12,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228694988] [2023-12-02 19:08:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:12,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:08:12,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:12,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228694988] [2023-12-02 19:08:12,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228694988] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:12,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:12,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:12,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109332122] [2023-12-02 19:08:12,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:12,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:12,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:12,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:12,508 INFO L87 Difference]: Start difference. First operand 460 states and 699 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:12,626 INFO L93 Difference]: Finished difference Result 980 states and 1514 transitions. [2023-12-02 19:08:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:12,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2023-12-02 19:08:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:12,632 INFO L225 Difference]: With dead ends: 980 [2023-12-02 19:08:12,632 INFO L226 Difference]: Without dead ends: 690 [2023-12-02 19:08:12,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:12,636 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 156 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:12,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 799 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2023-12-02 19:08:12,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 688. [2023-12-02 19:08:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.5327510917030567) internal successors, (1053), 687 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1053 transitions. [2023-12-02 19:08:12,663 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1053 transitions. Word has length 114 [2023-12-02 19:08:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:12,663 INFO L495 AbstractCegarLoop]: Abstraction has 688 states and 1053 transitions. [2023-12-02 19:08:12,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:12,664 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1053 transitions. [2023-12-02 19:08:12,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 19:08:12,665 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:12,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:12,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 19:08:12,666 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:12,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:12,667 INFO L85 PathProgramCache]: Analyzing trace with hash -632682071, now seen corresponding path program 1 times [2023-12-02 19:08:12,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:12,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622064659] [2023-12-02 19:08:12,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:12,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:08:12,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:12,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622064659] [2023-12-02 19:08:12,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622064659] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:12,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:12,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:12,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843842182] [2023-12-02 19:08:12,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:12,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:12,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:12,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:12,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:12,808 INFO L87 Difference]: Start difference. First operand 688 states and 1053 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:12,909 INFO L93 Difference]: Finished difference Result 1518 states and 2355 transitions. [2023-12-02 19:08:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:12,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2023-12-02 19:08:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:12,916 INFO L225 Difference]: With dead ends: 1518 [2023-12-02 19:08:12,916 INFO L226 Difference]: Without dead ends: 1000 [2023-12-02 19:08:12,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:12,919 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 155 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 720 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 19:08:12,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 720 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2023-12-02 19:08:12,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 998. [2023-12-02 19:08:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 1.5446339017051154) internal successors, (1540), 997 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1540 transitions. [2023-12-02 19:08:12,950 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1540 transitions. Word has length 116 [2023-12-02 19:08:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:12,950 INFO L495 AbstractCegarLoop]: Abstraction has 998 states and 1540 transitions. [2023-12-02 19:08:12,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1540 transitions. [2023-12-02 19:08:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-02 19:08:12,952 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:12,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:12,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 19:08:12,953 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:12,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:12,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1000127120, now seen corresponding path program 1 times [2023-12-02 19:08:12,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:12,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907737631] [2023-12-02 19:08:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:12,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:08:13,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:13,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907737631] [2023-12-02 19:08:13,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907737631] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:13,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:13,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:13,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531247621] [2023-12-02 19:08:13,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:13,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:13,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:13,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:13,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:13,084 INFO L87 Difference]: Start difference. First operand 998 states and 1540 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:13,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:13,190 INFO L93 Difference]: Finished difference Result 2430 states and 3771 transitions. [2023-12-02 19:08:13,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:13,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2023-12-02 19:08:13,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:13,200 INFO L225 Difference]: With dead ends: 2430 [2023-12-02 19:08:13,201 INFO L226 Difference]: Without dead ends: 1624 [2023-12-02 19:08:13,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:13,203 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 149 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:13,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 765 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:13,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2023-12-02 19:08:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1622. [2023-12-02 19:08:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 1.540407156076496) internal successors, (2497), 1621 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2497 transitions. [2023-12-02 19:08:13,254 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2497 transitions. Word has length 119 [2023-12-02 19:08:13,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:13,254 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2497 transitions. [2023-12-02 19:08:13,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:13,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2497 transitions. [2023-12-02 19:08:13,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-12-02 19:08:13,256 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:13,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:13,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 19:08:13,257 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:13,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:13,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1753347857, now seen corresponding path program 1 times [2023-12-02 19:08:13,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:13,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366081599] [2023-12-02 19:08:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:13,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:08:13,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:13,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366081599] [2023-12-02 19:08:13,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366081599] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:13,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:13,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:13,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749510844] [2023-12-02 19:08:13,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:13,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:13,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:13,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:13,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:13,382 INFO L87 Difference]: Start difference. First operand 1622 states and 2497 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:13,494 INFO L93 Difference]: Finished difference Result 3880 states and 6016 transitions. [2023-12-02 19:08:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:13,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-12-02 19:08:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:13,509 INFO L225 Difference]: With dead ends: 3880 [2023-12-02 19:08:13,510 INFO L226 Difference]: Without dead ends: 2450 [2023-12-02 19:08:13,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:13,513 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 148 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 722 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 19:08:13,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 722 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2023-12-02 19:08:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2448. [2023-12-02 19:08:13,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 1.546791990192072) internal successors, (3785), 2447 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:13,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 3785 transitions. [2023-12-02 19:08:13,604 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 3785 transitions. Word has length 121 [2023-12-02 19:08:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:13,604 INFO L495 AbstractCegarLoop]: Abstraction has 2448 states and 3785 transitions. [2023-12-02 19:08:13,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:13,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 3785 transitions. [2023-12-02 19:08:13,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 19:08:13,606 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:13,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:13,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 19:08:13,607 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:13,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:13,607 INFO L85 PathProgramCache]: Analyzing trace with hash 752386011, now seen corresponding path program 1 times [2023-12-02 19:08:13,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:13,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380466837] [2023-12-02 19:08:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:13,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:08:13,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:13,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380466837] [2023-12-02 19:08:13,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380466837] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:13,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:13,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:13,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057281318] [2023-12-02 19:08:13,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:13,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:13,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:13,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:13,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:13,716 INFO L87 Difference]: Start difference. First operand 2448 states and 3785 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:13,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:13,843 INFO L93 Difference]: Finished difference Result 6376 states and 9844 transitions. [2023-12-02 19:08:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:13,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2023-12-02 19:08:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:13,867 INFO L225 Difference]: With dead ends: 6376 [2023-12-02 19:08:13,867 INFO L226 Difference]: Without dead ends: 4142 [2023-12-02 19:08:13,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:13,871 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 142 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:13,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 731 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:13,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2023-12-02 19:08:13,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 4140. [2023-12-02 19:08:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 4139 states have (on average 1.5320125634211161) internal successors, (6341), 4139 states have internal predecessors, (6341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 6341 transitions. [2023-12-02 19:08:13,981 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 6341 transitions. Word has length 124 [2023-12-02 19:08:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:13,982 INFO L495 AbstractCegarLoop]: Abstraction has 4140 states and 6341 transitions. [2023-12-02 19:08:13,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 6341 transitions. [2023-12-02 19:08:13,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-02 19:08:13,984 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:13,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:13,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 19:08:13,984 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:13,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash 941841867, now seen corresponding path program 1 times [2023-12-02 19:08:13,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:13,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785344011] [2023-12-02 19:08:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:13,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:08:14,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:14,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785344011] [2023-12-02 19:08:14,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785344011] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:14,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:14,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:14,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077795261] [2023-12-02 19:08:14,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:14,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:14,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:14,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:14,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:14,135 INFO L87 Difference]: Start difference. First operand 4140 states and 6341 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:14,277 INFO L93 Difference]: Finished difference Result 10322 states and 15881 transitions. [2023-12-02 19:08:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:14,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2023-12-02 19:08:14,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:14,313 INFO L225 Difference]: With dead ends: 10322 [2023-12-02 19:08:14,313 INFO L226 Difference]: Without dead ends: 6396 [2023-12-02 19:08:14,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:14,319 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 141 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 724 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 19:08:14,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 724 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:14,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6396 states. [2023-12-02 19:08:14,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6396 to 6394. [2023-12-02 19:08:14,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6394 states, 6393 states have (on average 1.5363679023932426) internal successors, (9822), 6393 states have internal predecessors, (9822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:14,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 9822 transitions. [2023-12-02 19:08:14,485 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 9822 transitions. Word has length 126 [2023-12-02 19:08:14,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:14,486 INFO L495 AbstractCegarLoop]: Abstraction has 6394 states and 9822 transitions. [2023-12-02 19:08:14,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:14,486 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 9822 transitions. [2023-12-02 19:08:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-02 19:08:14,487 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:14,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:14,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 19:08:14,488 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:14,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:14,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1032134, now seen corresponding path program 1 times [2023-12-02 19:08:14,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:14,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919341685] [2023-12-02 19:08:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:08:14,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:14,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919341685] [2023-12-02 19:08:14,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919341685] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:14,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:14,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:08:14,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136298334] [2023-12-02 19:08:14,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:14,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:08:14,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:14,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:08:14,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:08:14,738 INFO L87 Difference]: Start difference. First operand 6394 states and 9822 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:15,210 INFO L93 Difference]: Finished difference Result 16018 states and 24688 transitions. [2023-12-02 19:08:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 19:08:15,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2023-12-02 19:08:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:15,261 INFO L225 Difference]: With dead ends: 16018 [2023-12-02 19:08:15,262 INFO L226 Difference]: Without dead ends: 9806 [2023-12-02 19:08:15,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-02 19:08:15,271 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 1233 mSDsluCounter, 3185 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 3574 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:15,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 3574 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:08:15,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9806 states. [2023-12-02 19:08:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9806 to 9749. [2023-12-02 19:08:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9749 states, 9748 states have (on average 1.5424702503077554) internal successors, (15036), 9748 states have internal predecessors, (15036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9749 states to 9749 states and 15036 transitions. [2023-12-02 19:08:15,541 INFO L78 Accepts]: Start accepts. Automaton has 9749 states and 15036 transitions. Word has length 129 [2023-12-02 19:08:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:15,541 INFO L495 AbstractCegarLoop]: Abstraction has 9749 states and 15036 transitions. [2023-12-02 19:08:15,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 9749 states and 15036 transitions. [2023-12-02 19:08:15,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 19:08:15,543 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:15,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:15,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 19:08:15,544 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:15,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:15,544 INFO L85 PathProgramCache]: Analyzing trace with hash -35065858, now seen corresponding path program 1 times [2023-12-02 19:08:15,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:15,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089349339] [2023-12-02 19:08:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:15,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:08:15,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:15,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089349339] [2023-12-02 19:08:15,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089349339] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:15,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:15,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:08:15,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592750114] [2023-12-02 19:08:15,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:15,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:08:15,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:15,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:08:15,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:08:15,688 INFO L87 Difference]: Start difference. First operand 9749 states and 15036 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:15,858 INFO L93 Difference]: Finished difference Result 19264 states and 29729 transitions. [2023-12-02 19:08:15,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:08:15,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2023-12-02 19:08:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:15,876 INFO L225 Difference]: With dead ends: 19264 [2023-12-02 19:08:15,877 INFO L226 Difference]: Without dead ends: 9751 [2023-12-02 19:08:15,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:08:15,887 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 301 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:15,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1086 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:15,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9751 states. [2023-12-02 19:08:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9751 to 9742. [2023-12-02 19:08:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9742 states, 9741 states have (on average 1.5393696745713992) internal successors, (14995), 9741 states have internal predecessors, (14995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9742 states to 9742 states and 14995 transitions. [2023-12-02 19:08:16,117 INFO L78 Accepts]: Start accepts. Automaton has 9742 states and 14995 transitions. Word has length 130 [2023-12-02 19:08:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:16,118 INFO L495 AbstractCegarLoop]: Abstraction has 9742 states and 14995 transitions. [2023-12-02 19:08:16,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 9742 states and 14995 transitions. [2023-12-02 19:08:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 19:08:16,120 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:16,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:16,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 19:08:16,120 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:16,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:16,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1534788798, now seen corresponding path program 1 times [2023-12-02 19:08:16,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:16,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488155689] [2023-12-02 19:08:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:16,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:08:16,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:16,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488155689] [2023-12-02 19:08:16,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488155689] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:16,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:16,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:08:16,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063397313] [2023-12-02 19:08:16,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:16,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:08:16,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:08:16,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:08:16,609 INFO L87 Difference]: Start difference. First operand 9742 states and 14995 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:16,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:16,803 INFO L93 Difference]: Finished difference Result 15592 states and 23765 transitions. [2023-12-02 19:08:16,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:08:16,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2023-12-02 19:08:16,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:16,860 INFO L225 Difference]: With dead ends: 15592 [2023-12-02 19:08:16,861 INFO L226 Difference]: Without dead ends: 15590 [2023-12-02 19:08:16,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:08:16,864 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 309 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:16,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 1805 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15590 states. [2023-12-02 19:08:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15590 to 9866. [2023-12-02 19:08:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9866 states, 9865 states have (on average 1.5251900658895083) internal successors, (15046), 9865 states have internal predecessors, (15046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9866 states to 9866 states and 15046 transitions. [2023-12-02 19:08:17,120 INFO L78 Accepts]: Start accepts. Automaton has 9866 states and 15046 transitions. Word has length 139 [2023-12-02 19:08:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:17,121 INFO L495 AbstractCegarLoop]: Abstraction has 9866 states and 15046 transitions. [2023-12-02 19:08:17,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 9866 states and 15046 transitions. [2023-12-02 19:08:17,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-12-02 19:08:17,124 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:17,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:17,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 19:08:17,125 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:17,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:17,126 INFO L85 PathProgramCache]: Analyzing trace with hash -949683181, now seen corresponding path program 1 times [2023-12-02 19:08:17,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:17,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373481683] [2023-12-02 19:08:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:17,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:08:20,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:20,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373481683] [2023-12-02 19:08:20,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373481683] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:08:20,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365571714] [2023-12-02 19:08:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:20,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:08:20,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:08:20,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:08:20,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:08:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:20,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 19:08:20,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:08:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 19:08:20,687 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:08:20,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365571714] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:20,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:08:20,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2023-12-02 19:08:20,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434847175] [2023-12-02 19:08:20,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:20,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:08:20,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:08:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-12-02 19:08:20,689 INFO L87 Difference]: Start difference. First operand 9866 states and 15046 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:20,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:20,883 INFO L93 Difference]: Finished difference Result 29165 states and 44444 transitions. [2023-12-02 19:08:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:08:20,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-12-02 19:08:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:20,922 INFO L225 Difference]: With dead ends: 29165 [2023-12-02 19:08:20,922 INFO L226 Difference]: Without dead ends: 19333 [2023-12-02 19:08:20,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-12-02 19:08:20,935 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 1012 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:20,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1012 Valid, 763 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:20,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19333 states. [2023-12-02 19:08:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19333 to 19331. [2023-12-02 19:08:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19331 states, 19330 states have (on average 1.5194516295913088) internal successors, (29371), 19330 states have internal predecessors, (29371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19331 states to 19331 states and 29371 transitions. [2023-12-02 19:08:21,225 INFO L78 Accepts]: Start accepts. Automaton has 19331 states and 29371 transitions. Word has length 151 [2023-12-02 19:08:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:21,225 INFO L495 AbstractCegarLoop]: Abstraction has 19331 states and 29371 transitions. [2023-12-02 19:08:21,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 19331 states and 29371 transitions. [2023-12-02 19:08:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-12-02 19:08:21,228 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:21,229 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:21,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:08:21,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:08:21,430 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:21,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:21,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1543154447, now seen corresponding path program 1 times [2023-12-02 19:08:21,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:21,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364947660] [2023-12-02 19:08:21,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:21,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 19:08:21,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:21,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364947660] [2023-12-02 19:08:21,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364947660] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:21,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:21,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:21,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865882952] [2023-12-02 19:08:21,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:21,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:21,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:21,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:21,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:21,541 INFO L87 Difference]: Start difference. First operand 19331 states and 29371 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:21,731 INFO L93 Difference]: Finished difference Result 44408 states and 67638 transitions. [2023-12-02 19:08:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:21,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 152 [2023-12-02 19:08:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:21,770 INFO L225 Difference]: With dead ends: 44408 [2023-12-02 19:08:21,770 INFO L226 Difference]: Without dead ends: 25510 [2023-12-02 19:08:21,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:21,792 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 143 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:21,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 736 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:21,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25510 states. [2023-12-02 19:08:22,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25510 to 25508. [2023-12-02 19:08:22,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25508 states, 25507 states have (on average 1.509389579331164) internal successors, (38500), 25507 states have internal predecessors, (38500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25508 states to 25508 states and 38500 transitions. [2023-12-02 19:08:22,179 INFO L78 Accepts]: Start accepts. Automaton has 25508 states and 38500 transitions. Word has length 152 [2023-12-02 19:08:22,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:22,179 INFO L495 AbstractCegarLoop]: Abstraction has 25508 states and 38500 transitions. [2023-12-02 19:08:22,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:22,180 INFO L276 IsEmpty]: Start isEmpty. Operand 25508 states and 38500 transitions. [2023-12-02 19:08:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-02 19:08:22,183 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:22,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:22,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 19:08:22,183 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:22,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:22,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1445825510, now seen corresponding path program 1 times [2023-12-02 19:08:22,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:22,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826459699] [2023-12-02 19:08:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:22,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 19:08:22,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:22,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826459699] [2023-12-02 19:08:22,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826459699] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:22,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:22,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:22,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820813895] [2023-12-02 19:08:22,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:22,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:22,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:22,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:22,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:22,305 INFO L87 Difference]: Start difference. First operand 25508 states and 38500 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:22,627 INFO L93 Difference]: Finished difference Result 74888 states and 112888 transitions. [2023-12-02 19:08:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:22,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2023-12-02 19:08:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:22,677 INFO L225 Difference]: With dead ends: 74888 [2023-12-02 19:08:22,677 INFO L226 Difference]: Without dead ends: 49490 [2023-12-02 19:08:22,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:22,694 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 251 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:22,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1041 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:22,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49490 states. [2023-12-02 19:08:23,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49490 to 49488. [2023-12-02 19:08:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49488 states, 49487 states have (on average 1.5007375674419545) internal successors, (74267), 49487 states have internal predecessors, (74267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49488 states to 49488 states and 74267 transitions. [2023-12-02 19:08:23,548 INFO L78 Accepts]: Start accepts. Automaton has 49488 states and 74267 transitions. Word has length 153 [2023-12-02 19:08:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:23,549 INFO L495 AbstractCegarLoop]: Abstraction has 49488 states and 74267 transitions. [2023-12-02 19:08:23,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:23,549 INFO L276 IsEmpty]: Start isEmpty. Operand 49488 states and 74267 transitions. [2023-12-02 19:08:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-02 19:08:23,551 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:23,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:23,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 19:08:23,551 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:23,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:23,552 INFO L85 PathProgramCache]: Analyzing trace with hash 145724086, now seen corresponding path program 1 times [2023-12-02 19:08:23,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:23,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266916216] [2023-12-02 19:08:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:23,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:08:23,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:23,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266916216] [2023-12-02 19:08:23,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266916216] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:23,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:23,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:23,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287217905] [2023-12-02 19:08:23,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:23,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:23,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:23,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:23,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:23,642 INFO L87 Difference]: Start difference. First operand 49488 states and 74267 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:24,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:24,158 INFO L93 Difference]: Finished difference Result 148304 states and 222547 transitions. [2023-12-02 19:08:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:24,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 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 153 [2023-12-02 19:08:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:24,272 INFO L225 Difference]: With dead ends: 148304 [2023-12-02 19:08:24,272 INFO L226 Difference]: Without dead ends: 98894 [2023-12-02 19:08:24,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:24,313 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 346 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:24,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 742 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:08:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98894 states. [2023-12-02 19:08:25,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98894 to 49500. [2023-12-02 19:08:25,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49500 states, 49499 states have (on average 1.5006565789207862) internal successors, (74281), 49499 states have internal predecessors, (74281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49500 states to 49500 states and 74281 transitions. [2023-12-02 19:08:25,315 INFO L78 Accepts]: Start accepts. Automaton has 49500 states and 74281 transitions. Word has length 153 [2023-12-02 19:08:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:25,315 INFO L495 AbstractCegarLoop]: Abstraction has 49500 states and 74281 transitions. [2023-12-02 19:08:25,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 49500 states and 74281 transitions. [2023-12-02 19:08:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-12-02 19:08:25,318 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:25,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:25,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 19:08:25,319 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:25,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:25,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1643292343, now seen corresponding path program 1 times [2023-12-02 19:08:25,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:25,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549518996] [2023-12-02 19:08:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:25,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 19:08:25,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:25,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549518996] [2023-12-02 19:08:25,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549518996] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:25,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:25,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:25,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870973815] [2023-12-02 19:08:25,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:25,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:25,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:25,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:25,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:25,427 INFO L87 Difference]: Start difference. First operand 49500 states and 74281 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:25,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:25,934 INFO L93 Difference]: Finished difference Result 115622 states and 174153 transitions. [2023-12-02 19:08:25,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:25,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 154 [2023-12-02 19:08:25,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:26,008 INFO L225 Difference]: With dead ends: 115622 [2023-12-02 19:08:26,008 INFO L226 Difference]: Without dead ends: 66740 [2023-12-02 19:08:26,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:26,031 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 158 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:26,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 737 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:26,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66740 states. [2023-12-02 19:08:26,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66740 to 66738. [2023-12-02 19:08:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66738 states, 66737 states have (on average 1.487675502345026) internal successors, (99283), 66737 states have internal predecessors, (99283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:26,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66738 states to 66738 states and 99283 transitions. [2023-12-02 19:08:26,934 INFO L78 Accepts]: Start accepts. Automaton has 66738 states and 99283 transitions. Word has length 154 [2023-12-02 19:08:26,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:26,934 INFO L495 AbstractCegarLoop]: Abstraction has 66738 states and 99283 transitions. [2023-12-02 19:08:26,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:26,935 INFO L276 IsEmpty]: Start isEmpty. Operand 66738 states and 99283 transitions. [2023-12-02 19:08:26,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-12-02 19:08:26,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:26,939 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:26,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 19:08:26,939 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:26,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:26,940 INFO L85 PathProgramCache]: Analyzing trace with hash 994499957, now seen corresponding path program 1 times [2023-12-02 19:08:26,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:26,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968308505] [2023-12-02 19:08:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:26,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:08:29,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:29,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968308505] [2023-12-02 19:08:29,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968308505] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:08:29,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052866829] [2023-12-02 19:08:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:29,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:08:29,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:08:29,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:08:29,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:08:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:29,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 19:08:29,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:08:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 19:08:29,619 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:08:29,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052866829] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:29,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:08:29,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2023-12-02 19:08:29,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916042826] [2023-12-02 19:08:29,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:29,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:08:29,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:29,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:08:29,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-12-02 19:08:29,621 INFO L87 Difference]: Start difference. First operand 66738 states and 99283 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:30,258 INFO L93 Difference]: Finished difference Result 196771 states and 292338 transitions. [2023-12-02 19:08:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:08:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2023-12-02 19:08:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:30,408 INFO L225 Difference]: With dead ends: 196771 [2023-12-02 19:08:30,408 INFO L226 Difference]: Without dead ends: 130076 [2023-12-02 19:08:30,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-12-02 19:08:30,439 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 1020 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:30,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1020 Valid, 710 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130076 states. [2023-12-02 19:08:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130076 to 130074. [2023-12-02 19:08:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130074 states, 130073 states have (on average 1.4794461571579036) internal successors, (192436), 130073 states have internal predecessors, (192436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130074 states to 130074 states and 192436 transitions. [2023-12-02 19:08:32,260 INFO L78 Accepts]: Start accepts. Automaton has 130074 states and 192436 transitions. Word has length 154 [2023-12-02 19:08:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:32,261 INFO L495 AbstractCegarLoop]: Abstraction has 130074 states and 192436 transitions. [2023-12-02 19:08:32,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 130074 states and 192436 transitions. [2023-12-02 19:08:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-12-02 19:08:32,265 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:32,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:32,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:08:32,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 19:08:32,466 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:32,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:32,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1277634265, now seen corresponding path program 1 times [2023-12-02 19:08:32,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:32,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081404224] [2023-12-02 19:08:32,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:32,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 19:08:32,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:32,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081404224] [2023-12-02 19:08:32,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081404224] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:32,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:32,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:32,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306535526] [2023-12-02 19:08:32,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:32,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:32,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:32,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:32,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:32,574 INFO L87 Difference]: Start difference. First operand 130074 states and 192436 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 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 19:08:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:33,745 INFO L93 Difference]: Finished difference Result 301682 states and 447518 transitions. [2023-12-02 19:08:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:33,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 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) Word has length 155 [2023-12-02 19:08:33,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:34,026 INFO L225 Difference]: With dead ends: 301682 [2023-12-02 19:08:34,027 INFO L226 Difference]: Without dead ends: 172960 [2023-12-02 19:08:34,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:34,060 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 151 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:34,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 741 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:34,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172960 states. [2023-12-02 19:08:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172960 to 172958. [2023-12-02 19:08:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172958 states, 172957 states have (on average 1.4660291286273466) internal successors, (253560), 172957 states have internal predecessors, (253560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172958 states to 172958 states and 253560 transitions. [2023-12-02 19:08:36,442 INFO L78 Accepts]: Start accepts. Automaton has 172958 states and 253560 transitions. Word has length 155 [2023-12-02 19:08:36,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:36,443 INFO L495 AbstractCegarLoop]: Abstraction has 172958 states and 253560 transitions. [2023-12-02 19:08:36,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 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 19:08:36,443 INFO L276 IsEmpty]: Start isEmpty. Operand 172958 states and 253560 transitions. [2023-12-02 19:08:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-02 19:08:36,446 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:36,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:36,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 19:08:36,447 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:36,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:36,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1800218934, now seen corresponding path program 1 times [2023-12-02 19:08:36,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:36,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285879195] [2023-12-02 19:08:36,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:36,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 19:08:36,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:36,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285879195] [2023-12-02 19:08:36,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285879195] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:36,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:36,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:36,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316736152] [2023-12-02 19:08:36,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:36,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:36,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:36,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:36,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:36,558 INFO L87 Difference]: Start difference. First operand 172958 states and 253560 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:38,060 INFO L93 Difference]: Finished difference Result 511825 states and 750389 transitions. [2023-12-02 19:08:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:38,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2023-12-02 19:08:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:38,501 INFO L225 Difference]: With dead ends: 511825 [2023-12-02 19:08:38,501 INFO L226 Difference]: Without dead ends: 339275 [2023-12-02 19:08:38,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:38,849 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 263 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:38,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1048 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:39,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339275 states. [2023-12-02 19:08:42,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339275 to 339273. [2023-12-02 19:08:42,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339273 states, 339272 states have (on average 1.4609133674455894) internal successors, (495647), 339272 states have internal predecessors, (495647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339273 states to 339273 states and 495647 transitions. [2023-12-02 19:08:43,261 INFO L78 Accepts]: Start accepts. Automaton has 339273 states and 495647 transitions. Word has length 156 [2023-12-02 19:08:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:43,261 INFO L495 AbstractCegarLoop]: Abstraction has 339273 states and 495647 transitions. [2023-12-02 19:08:43,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 339273 states and 495647 transitions. [2023-12-02 19:08:43,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-02 19:08:43,269 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:43,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:43,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 19:08:43,270 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:43,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:43,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1120614461, now seen corresponding path program 1 times [2023-12-02 19:08:43,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:43,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866567802] [2023-12-02 19:08:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:43,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:08:43,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:43,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866567802] [2023-12-02 19:08:43,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866567802] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:43,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:08:43,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:08:43,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339678274] [2023-12-02 19:08:43,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:43,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:08:43,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:43,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:08:43,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:43,352 INFO L87 Difference]: Start difference. First operand 339273 states and 495647 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:46,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:46,565 INFO L93 Difference]: Finished difference Result 1017320 states and 1486188 transitions. [2023-12-02 19:08:46,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:08:46,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2023-12-02 19:08:46,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:47,905 INFO L225 Difference]: With dead ends: 1017320 [2023-12-02 19:08:47,905 INFO L226 Difference]: Without dead ends: 678481 [2023-12-02 19:08:48,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:08:48,042 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 371 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:48,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1090 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678481 states. [2023-12-02 19:08:53,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678481 to 339279. [2023-12-02 19:08:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339279 states, 339278 states have (on average 1.4609052163712355) internal successors, (495653), 339278 states have internal predecessors, (495653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:54,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339279 states to 339279 states and 495653 transitions. [2023-12-02 19:08:54,273 INFO L78 Accepts]: Start accepts. Automaton has 339279 states and 495653 transitions. Word has length 156 [2023-12-02 19:08:54,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:08:54,273 INFO L495 AbstractCegarLoop]: Abstraction has 339279 states and 495653 transitions. [2023-12-02 19:08:54,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:08:54,273 INFO L276 IsEmpty]: Start isEmpty. Operand 339279 states and 495653 transitions. [2023-12-02 19:08:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-12-02 19:08:54,279 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:08:54,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:08:54,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 19:08:54,280 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:08:54,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:08:54,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1919132882, now seen corresponding path program 1 times [2023-12-02 19:08:54,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:08:54,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746604000] [2023-12-02 19:08:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:54,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:08:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:08:56,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:08:56,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746604000] [2023-12-02 19:08:56,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746604000] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:08:56,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479202291] [2023-12-02 19:08:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:08:56,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:08:56,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:08:56,529 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:08:56,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:08:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:08:56,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 19:08:56,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:08:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:08:56,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:08:56,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479202291] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:08:56,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:08:56,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2023-12-02 19:08:56,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871182034] [2023-12-02 19:08:56,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:08:56,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:08:56,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:08:56,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:08:56,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-12-02 19:08:56,774 INFO L87 Difference]: Start difference. First operand 339279 states and 495653 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 3 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 19:08:58,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:08:58,723 INFO L93 Difference]: Finished difference Result 679787 states and 992970 transitions. [2023-12-02 19:08:58,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:08:58,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 3 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) Word has length 157 [2023-12-02 19:08:58,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:08:59,224 INFO L225 Difference]: With dead ends: 679787 [2023-12-02 19:08:59,224 INFO L226 Difference]: Without dead ends: 340526 [2023-12-02 19:08:59,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-12-02 19:08:59,343 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 1004 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:08:59,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1004 Valid, 859 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:08:59,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340526 states. [2023-12-02 19:09:02,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340526 to 339540. [2023-12-02 19:09:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339540 states, 339539 states have (on average 1.460866056623834) internal successors, (496021), 339539 states have internal predecessors, (496021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:09:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339540 states to 339540 states and 496021 transitions. [2023-12-02 19:09:03,604 INFO L78 Accepts]: Start accepts. Automaton has 339540 states and 496021 transitions. Word has length 157 [2023-12-02 19:09:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:09:03,604 INFO L495 AbstractCegarLoop]: Abstraction has 339540 states and 496021 transitions. [2023-12-02 19:09:03,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 3 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 19:09:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 339540 states and 496021 transitions. [2023-12-02 19:09:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-12-02 19:09:03,611 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:09:03,611 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:09:03,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 19:09:03,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 19:09:03,812 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:09:03,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:09:03,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1657622335, now seen corresponding path program 1 times [2023-12-02 19:09:03,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:09:03,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77148645] [2023-12-02 19:09:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:09:03,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:09:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:09:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:09:04,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:09:04,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77148645] [2023-12-02 19:09:04,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77148645] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:09:04,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:09:04,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:09:04,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81221848] [2023-12-02 19:09:04,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:09:04,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:09:04,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:09:04,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:09:04,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:09:04,423 INFO L87 Difference]: Start difference. First operand 339540 states and 496021 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:09:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:09:07,266 INFO L93 Difference]: Finished difference Result 1018446 states and 1487820 transitions. [2023-12-02 19:09:07,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:09:07,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2023-12-02 19:09:07,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:09:08,626 INFO L225 Difference]: With dead ends: 1018446 [2023-12-02 19:09:08,626 INFO L226 Difference]: Without dead ends: 679060 [2023-12-02 19:09:08,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:09:08,774 INFO L413 NwaCegarLoop]: 742 mSDtfsCounter, 395 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:09:08,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 1111 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:09:09,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679060 states. [2023-12-02 19:09:13,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679060 to 339543. [2023-12-02 19:09:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339543 states, 339542 states have (on average 1.4608619846734718) internal successors, (496024), 339542 states have internal predecessors, (496024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:09:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339543 states to 339543 states and 496024 transitions. [2023-12-02 19:09:14,196 INFO L78 Accepts]: Start accepts. Automaton has 339543 states and 496024 transitions. Word has length 159 [2023-12-02 19:09:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:09:14,197 INFO L495 AbstractCegarLoop]: Abstraction has 339543 states and 496024 transitions. [2023-12-02 19:09:14,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:09:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 339543 states and 496024 transitions. [2023-12-02 19:09:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 19:09:14,202 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:09:14,203 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:09:14,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 19:09:14,203 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:09:14,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:09:14,203 INFO L85 PathProgramCache]: Analyzing trace with hash -546555348, now seen corresponding path program 1 times [2023-12-02 19:09:14,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:09:14,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008099732] [2023-12-02 19:09:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:09:14,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:09:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:09:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 19:09:14,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:09:14,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008099732] [2023-12-02 19:09:14,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008099732] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:09:14,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:09:14,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:09:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674491214] [2023-12-02 19:09:14,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:09:14,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:09:14,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:09:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:09:14,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:09:14,917 INFO L87 Difference]: Start difference. First operand 339543 states and 496024 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:09:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:09:16,857 INFO L93 Difference]: Finished difference Result 676497 states and 988545 transitions. [2023-12-02 19:09:16,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:09:16,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 160 [2023-12-02 19:09:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:09:17,329 INFO L225 Difference]: With dead ends: 676497 [2023-12-02 19:09:17,330 INFO L226 Difference]: Without dead ends: 339543 [2023-12-02 19:09:17,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:09:17,444 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 684 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:09:17,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 691 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:09:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339543 states. [2023-12-02 19:09:20,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339543 to 339543. [2023-12-02 19:09:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339543 states, 339542 states have (on average 1.4382432806545287) internal successors, (488344), 339542 states have internal predecessors, (488344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:09:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339543 states to 339543 states and 488344 transitions. [2023-12-02 19:09:21,268 INFO L78 Accepts]: Start accepts. Automaton has 339543 states and 488344 transitions. Word has length 160 [2023-12-02 19:09:21,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:09:21,268 INFO L495 AbstractCegarLoop]: Abstraction has 339543 states and 488344 transitions. [2023-12-02 19:09:21,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:09:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand 339543 states and 488344 transitions. [2023-12-02 19:09:21,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 19:09:21,274 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:09:21,274 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:09:21,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-02 19:09:21,274 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:09:21,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:09:21,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1935399377, now seen corresponding path program 1 times [2023-12-02 19:09:21,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:09:21,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913186983] [2023-12-02 19:09:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:09:21,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:09:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:09:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:09:24,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:09:24,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913186983] [2023-12-02 19:09:24,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913186983] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:09:24,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144968109] [2023-12-02 19:09:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:09:24,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:09:24,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:09:24,130 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:09:24,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:09:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:09:24,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 19:09:24,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:09:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 19:09:24,528 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:09:24,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144968109] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:09:24,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:09:24,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2023-12-02 19:09:24,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284412127] [2023-12-02 19:09:24,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:09:24,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:09:24,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:09:24,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:09:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-12-02 19:09:24,530 INFO L87 Difference]: Start difference. First operand 339543 states and 488344 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:09:26,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:09:26,784 INFO L93 Difference]: Finished difference Result 1003135 states and 1442476 transitions. [2023-12-02 19:09:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:09:26,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 160 [2023-12-02 19:09:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:09:28,256 INFO L225 Difference]: With dead ends: 1003135 [2023-12-02 19:09:28,256 INFO L226 Difference]: Without dead ends: 664159 [2023-12-02 19:09:28,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-12-02 19:09:28,406 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 898 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:09:28,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 839 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:09:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664159 states. [2023-12-02 19:09:34,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664159 to 664157. [2023-12-02 19:09:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664157 states, 664156 states have (on average 1.4317750648943923) internal successors, (950922), 664156 states have internal predecessors, (950922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:09:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664157 states to 664157 states and 950922 transitions. [2023-12-02 19:09:36,265 INFO L78 Accepts]: Start accepts. Automaton has 664157 states and 950922 transitions. Word has length 160 [2023-12-02 19:09:36,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:09:36,265 INFO L495 AbstractCegarLoop]: Abstraction has 664157 states and 950922 transitions. [2023-12-02 19:09:36,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:09:36,265 INFO L276 IsEmpty]: Start isEmpty. Operand 664157 states and 950922 transitions. [2023-12-02 19:09:36,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-12-02 19:09:36,874 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:09:36,874 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:09:36,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:09:37,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 19:09:37,075 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:09:37,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:09:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash -232962745, now seen corresponding path program 1 times [2023-12-02 19:09:37,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:09:37,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362679752] [2023-12-02 19:09:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:09:37,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:09:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:09:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:09:41,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:09:41,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362679752] [2023-12-02 19:09:41,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362679752] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:09:41,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851734103] [2023-12-02 19:09:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:09:41,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:09:41,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:09:41,289 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:09:41,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_675cb8bc-b3dd-4ac5-8d7a-6a2be682f875/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:09:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:09:41,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 19:09:41,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:09:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 19:09:41,635 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:09:41,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851734103] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:09:41,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:09:41,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 16 [2023-12-02 19:09:41,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713303556] [2023-12-02 19:09:41,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:09:41,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:09:41,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:09:41,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:09:41,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-12-02 19:09:41,637 INFO L87 Difference]: Start difference. First operand 664157 states and 950922 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:09:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:09:46,671 INFO L93 Difference]: Finished difference Result 1957887 states and 2808636 transitions. [2023-12-02 19:09:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:09:46,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 162 [2023-12-02 19:09:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:09:49,008 INFO L225 Difference]: With dead ends: 1957887 [2023-12-02 19:09:49,008 INFO L226 Difference]: Without dead ends: 1294411 [2023-12-02 19:09:49,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-12-02 19:09:49,284 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 898 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:09:49,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 848 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:09:50,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294411 states.