./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ --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 bed48b88780a9161d07013a5b96d251b4e7830e1504dd411292edd1687355823 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:50:36,440 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:50:36,551 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:50:36,558 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:50:36,559 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:50:36,594 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:50:36,595 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:50:36,595 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:50:36,596 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:50:36,597 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:50:36,598 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:50:36,599 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:50:36,599 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:50:36,600 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:50:36,601 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:50:36,601 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:50:36,602 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:50:36,603 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:50:36,603 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:50:36,604 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:50:36,605 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:50:36,606 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:50:36,607 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:50:36,608 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:50:36,608 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:50:36,609 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:50:36,609 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:50:36,610 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:50:36,611 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:50:36,611 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:50:36,612 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:50:36,612 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:50:36,613 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:50:36,613 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:50:36,614 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:50:36,615 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:50:36,615 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:50:36,616 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:50:36,616 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:50:36,617 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:50:36,617 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:50:36,618 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:50:36,619 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:50:36,619 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:50:36,620 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:50:36,620 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_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bed48b88780a9161d07013a5b96d251b4e7830e1504dd411292edd1687355823 [2023-11-19 04:50:36,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:50:37,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:50:37,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:50:37,024 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:50:37,025 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:50:37,028 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c [2023-11-19 04:50:40,477 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:50:40,807 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:50:40,808 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e018834e-6190-42cc-ab0d-1a697874c4b6/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c [2023-11-19 04:50:40,827 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ/data/d531ea759/70d3f4ca18344dc4878197b254162175/FLAGa53a5c50c [2023-11-19 04:50:40,845 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ/data/d531ea759/70d3f4ca18344dc4878197b254162175 [2023-11-19 04:50:40,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:50:40,856 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:50:40,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:50:40,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:50:40,865 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:50:40,869 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:50:40" (1/1) ... [2023-11-19 04:50:40,870 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ae16ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:40, skipping insertion in model container [2023-11-19 04:50:40,871 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:50:40" (1/1) ... [2023-11-19 04:50:40,955 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:50:41,388 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_e018834e-6190-42cc-ab0d-1a697874c4b6/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c[28194,28207] [2023-11-19 04:50:41,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:50:41,431 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:50:41,593 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_e018834e-6190-42cc-ab0d-1a697874c4b6/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c[28194,28207] [2023-11-19 04:50:41,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:50:41,616 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:50:41,617 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:41 WrapperNode [2023-11-19 04:50:41,617 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:50:41,618 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:50:41,619 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:50:41,619 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:50:41,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:41" (1/1) ... [2023-11-19 04:50:41,657 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:41" (1/1) ... [2023-11-19 04:50:41,726 INFO L138 Inliner]: procedures = 23, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 942 [2023-11-19 04:50:41,726 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:50:41,727 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:50:41,728 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:50:41,728 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:50:41,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:41" (1/1) ... [2023-11-19 04:50:41,749 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:41" (1/1) ... [2023-11-19 04:50:41,755 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:41" (1/1) ... [2023-11-19 04:50:41,756 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:41" (1/1) ... [2023-11-19 04:50:41,790 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:41" (1/1) ... [2023-11-19 04:50:41,818 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:41" (1/1) ... [2023-11-19 04:50:41,823 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:41" (1/1) ... [2023-11-19 04:50:41,880 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:41" (1/1) ... [2023-11-19 04:50:41,897 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:50:41,898 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:50:41,898 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:50:41,899 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:50:41,900 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:41" (1/1) ... [2023-11-19 04:50:41,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:50:41,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:50:41,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:50:41,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e018834e-6190-42cc-ab0d-1a697874c4b6/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:50:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:50:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:50:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:50:42,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:50:42,204 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:50:42,207 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:50:43,511 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:50:44,895 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:50:44,896 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:50:44,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:50:44 BoogieIcfgContainer [2023-11-19 04:50:44,907 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:50:44,911 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:50:44,911 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:50:44,915 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:50:44,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:50:40" (1/3) ... [2023-11-19 04:50:44,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19675757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:50:44, skipping insertion in model container [2023-11-19 04:50:44,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:41" (2/3) ... [2023-11-19 04:50:44,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19675757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:50:44, skipping insertion in model container [2023-11-19 04:50:44,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:50:44" (3/3) ... [2023-11-19 04:50:44,922 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.BOUNDED-8.pals.c [2023-11-19 04:50:44,945 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:50:44,946 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:50:45,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:50:45,036 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;@5e9c7fee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:50:45,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:50:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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) [2023-11-19 04:50:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-19 04:50:45,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:45,064 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] [2023-11-19 04:50:45,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:45,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:45,074 INFO L85 PathProgramCache]: Analyzing trace with hash 167986854, now seen corresponding path program 1 times [2023-11-19 04:50:45,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:45,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35586505] [2023-11-19 04:50:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:45,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:50,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:50,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35586505] [2023-11-19 04:50:50,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35586505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:50,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:50,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:50:50,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648105917] [2023-11-19 04:50:50,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:50,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:50:50,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:50,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:50:50,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:50:50,725 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-11-19 04:50:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:51,054 INFO L93 Difference]: Finished difference Result 180 states and 288 transitions. [2023-11-19 04:50:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:50:51,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2023-11-19 04:50:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:51,077 INFO L225 Difference]: With dead ends: 180 [2023-11-19 04:50:51,078 INFO L226 Difference]: Without dead ends: 158 [2023-11-19 04:50:51,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:50:51,089 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 29 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:51,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 372 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:50:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-19 04:50:51,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2023-11-19 04:50:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6122448979591837) internal successors, (237), 147 states have internal predecessors, (237), 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) [2023-11-19 04:50:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2023-11-19 04:50:51,176 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 54 [2023-11-19 04:50:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:51,178 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2023-11-19 04:50:51,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-11-19 04:50:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2023-11-19 04:50:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 04:50:51,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:51,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:51,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:50:51,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:51,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:51,188 INFO L85 PathProgramCache]: Analyzing trace with hash 844479129, now seen corresponding path program 1 times [2023-11-19 04:50:51,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:51,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598792451] [2023-11-19 04:50:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:51,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:54,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:54,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598792451] [2023-11-19 04:50:54,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598792451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:54,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:54,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:50:54,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065433277] [2023-11-19 04:50:54,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:54,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:50:54,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:50:54,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:50:54,355 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:50:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:54,604 INFO L93 Difference]: Finished difference Result 180 states and 285 transitions. [2023-11-19 04:50:54,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:50:54,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-19 04:50:54,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:54,609 INFO L225 Difference]: With dead ends: 180 [2023-11-19 04:50:54,610 INFO L226 Difference]: Without dead ends: 160 [2023-11-19 04:50:54,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:50:54,614 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 24 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:54,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:50:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-19 04:50:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-11-19 04:50:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6054421768707483) internal successors, (236), 147 states have internal predecessors, (236), 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) [2023-11-19 04:50:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2023-11-19 04:50:54,632 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 55 [2023-11-19 04:50:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:54,633 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2023-11-19 04:50:54,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:50:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2023-11-19 04:50:54,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 04:50:54,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:54,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:54,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:50:54,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:54,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:54,638 INFO L85 PathProgramCache]: Analyzing trace with hash 346354927, now seen corresponding path program 1 times [2023-11-19 04:50:54,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:54,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061734128] [2023-11-19 04:50:54,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:54,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:57,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:57,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061734128] [2023-11-19 04:50:57,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061734128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:57,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:57,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:50:57,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753442110] [2023-11-19 04:50:57,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:57,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:50:57,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:57,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:50:57,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:50:57,260 INFO L87 Difference]: Start difference. First operand 148 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:50:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:57,452 INFO L93 Difference]: Finished difference Result 180 states and 284 transitions. [2023-11-19 04:50:57,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:50:57,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-19 04:50:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:57,458 INFO L225 Difference]: With dead ends: 180 [2023-11-19 04:50:57,459 INFO L226 Difference]: Without dead ends: 160 [2023-11-19 04:50:57,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:50:57,465 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:57,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 384 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:50:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-19 04:50:57,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-11-19 04:50:57,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.598639455782313) internal successors, (235), 147 states have internal predecessors, (235), 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) [2023-11-19 04:50:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 235 transitions. [2023-11-19 04:50:57,482 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 235 transitions. Word has length 56 [2023-11-19 04:50:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:57,482 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 235 transitions. [2023-11-19 04:50:57,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:50:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 235 transitions. [2023-11-19 04:50:57,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-19 04:50:57,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:57,486 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] [2023-11-19 04:50:57,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:50:57,486 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:57,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2089825602, now seen corresponding path program 1 times [2023-11-19 04:50:57,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:57,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597064995] [2023-11-19 04:50:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:57,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:50:59,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597064995] [2023-11-19 04:50:59,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597064995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:59,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:59,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:50:59,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578901252] [2023-11-19 04:50:59,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:59,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:50:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:50:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:50:59,796 INFO L87 Difference]: Start difference. First operand 148 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-11-19 04:50:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:59,987 INFO L93 Difference]: Finished difference Result 180 states and 283 transitions. [2023-11-19 04:50:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:50:59,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2023-11-19 04:50:59,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:59,989 INFO L225 Difference]: With dead ends: 180 [2023-11-19 04:50:59,989 INFO L226 Difference]: Without dead ends: 160 [2023-11-19 04:50:59,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:50:59,991 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 20 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:59,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:50:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-19 04:51:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-11-19 04:51:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 147 states have internal predecessors, (234), 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) [2023-11-19 04:51:00,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 234 transitions. [2023-11-19 04:51:00,011 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 234 transitions. Word has length 57 [2023-11-19 04:51:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:00,013 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 234 transitions. [2023-11-19 04:51:00,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2023-11-19 04:51:00,013 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 234 transitions. [2023-11-19 04:51:00,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-19 04:51:00,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:00,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:00,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:51:00,016 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:00,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:00,017 INFO L85 PathProgramCache]: Analyzing trace with hash 308293432, now seen corresponding path program 1 times [2023-11-19 04:51:00,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:00,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681523057] [2023-11-19 04:51:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:00,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:02,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:02,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681523057] [2023-11-19 04:51:02,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681523057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:02,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:51:02,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:51:02,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453833194] [2023-11-19 04:51:02,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:02,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:51:02,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:02,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:51:02,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:51:02,366 INFO L87 Difference]: Start difference. First operand 148 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:02,548 INFO L93 Difference]: Finished difference Result 180 states and 282 transitions. [2023-11-19 04:51:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:51:02,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-19 04:51:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:02,550 INFO L225 Difference]: With dead ends: 180 [2023-11-19 04:51:02,550 INFO L226 Difference]: Without dead ends: 160 [2023-11-19 04:51:02,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:51:02,552 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 18 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:02,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:51:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-19 04:51:02,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-11-19 04:51:02,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 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) [2023-11-19 04:51:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2023-11-19 04:51:02,561 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 58 [2023-11-19 04:51:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:02,562 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2023-11-19 04:51:02,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:02,562 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2023-11-19 04:51:02,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-19 04:51:02,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:02,564 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] [2023-11-19 04:51:02,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:51:02,564 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:02,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:02,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1558216288, now seen corresponding path program 1 times [2023-11-19 04:51:02,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:02,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961492555] [2023-11-19 04:51:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:02,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:05,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:05,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961492555] [2023-11-19 04:51:05,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961492555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:05,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:51:05,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:51:05,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888607251] [2023-11-19 04:51:05,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:05,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:51:05,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:05,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:51:05,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:51:05,554 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2023-11-19 04:51:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:05,766 INFO L93 Difference]: Finished difference Result 178 states and 278 transitions. [2023-11-19 04:51:05,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:51:05,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 60 [2023-11-19 04:51:05,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:05,769 INFO L225 Difference]: With dead ends: 178 [2023-11-19 04:51:05,770 INFO L226 Difference]: Without dead ends: 158 [2023-11-19 04:51:05,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:51:05,772 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 15 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:05,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 377 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:51:05,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-19 04:51:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2023-11-19 04:51:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 148 states have internal predecessors, (234), 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) [2023-11-19 04:51:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 234 transitions. [2023-11-19 04:51:05,782 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 234 transitions. Word has length 60 [2023-11-19 04:51:05,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:05,782 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 234 transitions. [2023-11-19 04:51:05,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2023-11-19 04:51:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 234 transitions. [2023-11-19 04:51:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 04:51:05,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:05,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:05,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:51:05,785 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:05,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:05,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1148051527, now seen corresponding path program 1 times [2023-11-19 04:51:05,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:05,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145674462] [2023-11-19 04:51:05,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:05,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:07,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:07,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145674462] [2023-11-19 04:51:07,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145674462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:07,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:51:07,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:51:07,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82976930] [2023-11-19 04:51:07,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:07,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:51:07,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:07,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:51:07,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:51:07,889 INFO L87 Difference]: Start difference. First operand 149 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:08,041 INFO L93 Difference]: Finished difference Result 179 states and 279 transitions. [2023-11-19 04:51:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:51:08,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-19 04:51:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:08,044 INFO L225 Difference]: With dead ends: 179 [2023-11-19 04:51:08,044 INFO L226 Difference]: Without dead ends: 159 [2023-11-19 04:51:08,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:51:08,046 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 12 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:08,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 389 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:51:08,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-19 04:51:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2023-11-19 04:51:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 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) [2023-11-19 04:51:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2023-11-19 04:51:08,055 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 61 [2023-11-19 04:51:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:08,055 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2023-11-19 04:51:08,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:08,056 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2023-11-19 04:51:08,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 04:51:08,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:08,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:08,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:51:08,058 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:08,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:08,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2040951839, now seen corresponding path program 1 times [2023-11-19 04:51:08,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:08,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541965373] [2023-11-19 04:51:08,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:08,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:10,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:10,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541965373] [2023-11-19 04:51:10,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541965373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:10,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:51:10,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:51:10,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201435728] [2023-11-19 04:51:10,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:10,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:51:10,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:10,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:51:10,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:51:10,612 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:10,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:10,805 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2023-11-19 04:51:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:51:10,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-19 04:51:10,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:10,807 INFO L225 Difference]: With dead ends: 179 [2023-11-19 04:51:10,808 INFO L226 Difference]: Without dead ends: 159 [2023-11-19 04:51:10,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:51:10,809 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 7 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:10,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 554 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:51:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-19 04:51:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2023-11-19 04:51:10,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.5629139072847682) internal successors, (236), 151 states have internal predecessors, (236), 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) [2023-11-19 04:51:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 236 transitions. [2023-11-19 04:51:10,818 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 236 transitions. Word has length 63 [2023-11-19 04:51:10,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:10,819 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 236 transitions. [2023-11-19 04:51:10,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:10,820 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 236 transitions. [2023-11-19 04:51:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-19 04:51:10,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:10,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:10,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:51:10,822 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:10,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:10,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1165324149, now seen corresponding path program 1 times [2023-11-19 04:51:10,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:10,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344910338] [2023-11-19 04:51:10,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:10,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:12,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:12,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344910338] [2023-11-19 04:51:12,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344910338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:12,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:51:12,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:51:12,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081884153] [2023-11-19 04:51:12,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:12,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:51:12,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:12,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:51:12,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:51:12,820 INFO L87 Difference]: Start difference. First operand 152 states and 236 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:13,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:13,046 INFO L93 Difference]: Finished difference Result 182 states and 280 transitions. [2023-11-19 04:51:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:51:13,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-19 04:51:13,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:13,049 INFO L225 Difference]: With dead ends: 182 [2023-11-19 04:51:13,049 INFO L226 Difference]: Without dead ends: 162 [2023-11-19 04:51:13,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:51:13,050 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 12 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:13,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 748 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:51:13,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-19 04:51:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2023-11-19 04:51:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.5454545454545454) internal successors, (238), 154 states have internal predecessors, (238), 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) [2023-11-19 04:51:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 238 transitions. [2023-11-19 04:51:13,058 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 238 transitions. Word has length 64 [2023-11-19 04:51:13,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:13,058 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 238 transitions. [2023-11-19 04:51:13,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 238 transitions. [2023-11-19 04:51:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 04:51:13,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:13,060 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:13,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:51:13,061 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:13,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:13,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1680174357, now seen corresponding path program 1 times [2023-11-19 04:51:13,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:13,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821555515] [2023-11-19 04:51:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:13,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat