./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX --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 4008c7bad6e9f0faf3cf745d811b7950453991ed3720a7122a910bf51077877c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:46:31,834 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:46:31,961 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:46:31,970 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:46:31,971 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:46:32,010 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:46:32,012 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:46:32,012 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:46:32,013 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:46:32,018 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:46:32,019 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:46:32,020 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:46:32,021 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:46:32,022 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:46:32,023 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:46:32,023 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:46:32,024 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:46:32,024 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:46:32,025 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:46:32,025 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:46:32,026 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:46:32,026 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:46:32,027 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:46:32,027 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:46:32,028 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:46:32,028 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:46:32,029 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:46:32,029 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:46:32,029 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:46:32,030 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:46:32,030 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:46:32,031 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:46:32,031 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:46:32,031 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:46:32,032 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:46:32,032 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:46:32,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:32,032 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:46:32,033 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:46:32,033 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:46:32,033 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:46:32,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:46:32,034 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:46:32,034 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:46:32,034 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:46:32,034 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_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4008c7bad6e9f0faf3cf745d811b7950453991ed3720a7122a910bf51077877c [2023-11-12 00:46:32,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:46:32,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:46:32,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:46:32,435 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:46:32,436 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:46:32,438 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2023-11-12 00:46:35,467 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:46:35,755 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:46:35,756 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2023-11-12 00:46:35,772 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX/data/9485a3552/dbbbd9f3f6c04991a86032e07e463d68/FLAG61e0f276f [2023-11-12 00:46:35,788 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX/data/9485a3552/dbbbd9f3f6c04991a86032e07e463d68 [2023-11-12 00:46:35,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:46:35,793 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:46:35,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:35,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:46:35,800 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:46:35,800 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:35" (1/1) ... [2023-11-12 00:46:35,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46973897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:35, skipping insertion in model container [2023-11-12 00:46:35,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:35" (1/1) ... [2023-11-12 00:46:35,875 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:46:36,202 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_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10525,10538] [2023-11-12 00:46:36,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:36,311 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:46:36,414 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_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10525,10538] [2023-11-12 00:46:36,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:36,530 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:46:36,531 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:36 WrapperNode [2023-11-12 00:46:36,531 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:36,532 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:36,533 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:46:36,533 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:46:36,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:36" (1/1) ... [2023-11-12 00:46:36,592 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:36" (1/1) ... [2023-11-12 00:46:36,650 INFO L138 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 910 [2023-11-12 00:46:36,661 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:36,661 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:46:36,662 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:46:36,662 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:46:36,670 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:36" (1/1) ... [2023-11-12 00:46:36,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:36" (1/1) ... [2023-11-12 00:46:36,681 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:36" (1/1) ... [2023-11-12 00:46:36,681 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:36" (1/1) ... [2023-11-12 00:46:36,701 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:36" (1/1) ... [2023-11-12 00:46:36,709 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:36" (1/1) ... [2023-11-12 00:46:36,726 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:36" (1/1) ... [2023-11-12 00:46:36,733 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:36" (1/1) ... [2023-11-12 00:46:36,741 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:46:36,749 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:46:36,749 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:46:36,750 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:46:36,757 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:36" (1/1) ... [2023-11-12 00:46:36,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:36,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:36,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:46:36,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ffdb1d9-0530-4e46-bab6-b895c9b9154a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:46:36,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:46:36,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:46:36,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:46:36,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:46:37,049 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:46:37,051 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:46:37,842 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:46:38,167 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:46:38,168 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:46:38,171 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:38 BoogieIcfgContainer [2023-11-12 00:46:38,172 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:46:38,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:46:38,176 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:46:38,180 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:46:38,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:46:35" (1/3) ... [2023-11-12 00:46:38,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd624a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:38, skipping insertion in model container [2023-11-12 00:46:38,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:36" (2/3) ... [2023-11-12 00:46:38,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd624a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:38, skipping insertion in model container [2023-11-12 00:46:38,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:38" (3/3) ... [2023-11-12 00:46:38,185 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2023-11-12 00:46:38,206 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:46:38,206 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:46:38,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:46:38,273 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;@5bcdfda8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:46:38,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:46:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 145 states have (on average 1.7793103448275862) internal successors, (258), 147 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:38,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-12 00:46:38,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:38,293 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] [2023-11-12 00:46:38,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:38,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:38,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1173018147, now seen corresponding path program 1 times [2023-11-12 00:46:38,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:38,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176248209] [2023-11-12 00:46:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:38,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:39,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:39,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176248209] [2023-11-12 00:46:39,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176248209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:39,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:39,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:46:39,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63400665] [2023-11-12 00:46:39,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:39,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:46:39,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:39,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:46:39,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:46:39,307 INFO L87 Difference]: Start difference. First operand has 148 states, 145 states have (on average 1.7793103448275862) internal successors, (258), 147 states have internal predecessors, (258), 0 states have call successors, (0), 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 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:39,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:39,669 INFO L93 Difference]: Finished difference Result 244 states and 407 transitions. [2023-11-12 00:46:39,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:46:39,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2023-11-12 00:46:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:39,683 INFO L225 Difference]: With dead ends: 244 [2023-11-12 00:46:39,683 INFO L226 Difference]: Without dead ends: 145 [2023-11-12 00:46:39,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:46:39,690 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 697 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:39,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 161 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:46:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-12 00:46:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-12 00:46:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2083333333333333) internal successors, (174), 144 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 174 transitions. [2023-11-12 00:46:39,743 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 174 transitions. Word has length 93 [2023-11-12 00:46:39,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:39,744 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 174 transitions. [2023-11-12 00:46:39,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:39,745 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 174 transitions. [2023-11-12 00:46:39,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-12 00:46:39,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:39,752 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] [2023-11-12 00:46:39,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:46:39,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:39,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:39,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2038144999, now seen corresponding path program 1 times [2023-11-12 00:46:39,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:39,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188562127] [2023-11-12 00:46:39,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:39,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:40,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:40,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188562127] [2023-11-12 00:46:40,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188562127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:40,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:40,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:46:40,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15003436] [2023-11-12 00:46:40,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:40,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:46:40,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:40,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:46:40,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:46:40,162 INFO L87 Difference]: Start difference. First operand 145 states and 174 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:40,390 INFO L93 Difference]: Finished difference Result 218 states and 272 transitions. [2023-11-12 00:46:40,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:46:40,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2023-11-12 00:46:40,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:40,393 INFO L225 Difference]: With dead ends: 218 [2023-11-12 00:46:40,393 INFO L226 Difference]: Without dead ends: 145 [2023-11-12 00:46:40,394 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 [2023-11-12 00:46:40,396 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 409 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:40,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 124 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:46:40,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-12 00:46:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-12 00:46:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 144 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:40,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 172 transitions. [2023-11-12 00:46:40,408 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 172 transitions. Word has length 94 [2023-11-12 00:46:40,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:40,409 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 172 transitions. [2023-11-12 00:46:40,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 172 transitions. [2023-11-12 00:46:40,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-12 00:46:40,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:40,412 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] [2023-11-12 00:46:40,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:46:40,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:40,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:40,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1645513955, now seen corresponding path program 1 times [2023-11-12 00:46:40,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:40,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440527163] [2023-11-12 00:46:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:40,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:40,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:40,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440527163] [2023-11-12 00:46:40,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440527163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:40,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:40,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:46:40,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656946830] [2023-11-12 00:46:40,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:40,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:46:40,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:40,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:46:40,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:46:40,645 INFO L87 Difference]: Start difference. First operand 145 states and 172 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:40,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:40,825 INFO L93 Difference]: Finished difference Result 226 states and 278 transitions. [2023-11-12 00:46:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:46:40,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2023-11-12 00:46:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:40,828 INFO L225 Difference]: With dead ends: 226 [2023-11-12 00:46:40,828 INFO L226 Difference]: Without dead ends: 145 [2023-11-12 00:46:40,829 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 [2023-11-12 00:46:40,830 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 425 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:40,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 108 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-12 00:46:40,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-12 00:46:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1805555555555556) internal successors, (170), 144 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2023-11-12 00:46:40,842 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 95 [2023-11-12 00:46:40,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:40,842 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2023-11-12 00:46:40,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:40,843 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2023-11-12 00:46:40,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-12 00:46:40,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:40,845 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] [2023-11-12 00:46:40,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:46:40,845 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:40,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:40,846 INFO L85 PathProgramCache]: Analyzing trace with hash -570596007, now seen corresponding path program 1 times [2023-11-12 00:46:40,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:40,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262016662] [2023-11-12 00:46:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:40,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:41,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:41,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262016662] [2023-11-12 00:46:41,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262016662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:41,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:41,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:46:41,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668493033] [2023-11-12 00:46:41,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:41,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:46:41,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:41,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:46:41,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:46:41,035 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:41,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:41,186 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2023-11-12 00:46:41,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:46:41,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2023-11-12 00:46:41,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:41,188 INFO L225 Difference]: With dead ends: 222 [2023-11-12 00:46:41,188 INFO L226 Difference]: Without dead ends: 145 [2023-11-12 00:46:41,189 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 [2023-11-12 00:46:41,191 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 407 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:41,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 116 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:41,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-12 00:46:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-12 00:46:41,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1666666666666667) internal successors, (168), 144 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2023-11-12 00:46:41,201 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 96 [2023-11-12 00:46:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:41,201 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2023-11-12 00:46:41,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2023-11-12 00:46:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-12 00:46:41,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:41,204 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] [2023-11-12 00:46:41,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:46:41,204 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:41,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:41,205 INFO L85 PathProgramCache]: Analyzing trace with hash 488901399, now seen corresponding path program 1 times [2023-11-12 00:46:41,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:41,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496442326] [2023-11-12 00:46:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:41,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:41,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:41,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496442326] [2023-11-12 00:46:41,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496442326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:41,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:41,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:46:41,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364425699] [2023-11-12 00:46:41,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:41,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:46:41,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:41,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:46:41,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:46:41,461 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:41,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:41,622 INFO L93 Difference]: Finished difference Result 230 states and 275 transitions. [2023-11-12 00:46:41,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:46:41,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2023-11-12 00:46:41,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:41,625 INFO L225 Difference]: With dead ends: 230 [2023-11-12 00:46:41,625 INFO L226 Difference]: Without dead ends: 145 [2023-11-12 00:46:41,629 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 [2023-11-12 00:46:41,635 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 424 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:41,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 100 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:41,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-12 00:46:41,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-12 00:46:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 144 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2023-11-12 00:46:41,655 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 97 [2023-11-12 00:46:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:41,656 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2023-11-12 00:46:41,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2023-11-12 00:46:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-12 00:46:41,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:41,660 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] [2023-11-12 00:46:41,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:46:41,661 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:41,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:41,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1492958079, now seen corresponding path program 1 times [2023-11-12 00:46:41,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:41,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109088333] [2023-11-12 00:46:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:41,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:41,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:41,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109088333] [2023-11-12 00:46:41,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109088333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:41,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:41,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:46:41,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431481278] [2023-11-12 00:46:41,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:41,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:46:41,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:41,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:46:41,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:46:41,900 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:42,031 INFO L93 Difference]: Finished difference Result 210 states and 250 transitions. [2023-11-12 00:46:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:46:42,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2023-11-12 00:46:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:42,037 INFO L225 Difference]: With dead ends: 210 [2023-11-12 00:46:42,038 INFO L226 Difference]: Without dead ends: 145 [2023-11-12 00:46:42,038 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 [2023-11-12 00:46:42,044 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 360 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:42,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 140 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-12 00:46:42,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-12 00:46:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1388888888888888) internal successors, (164), 144 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 164 transitions. [2023-11-12 00:46:42,064 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 164 transitions. Word has length 98 [2023-11-12 00:46:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:42,064 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 164 transitions. [2023-11-12 00:46:42,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 164 transitions. [2023-11-12 00:46:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-12 00:46:42,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:42,066 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] [2023-11-12 00:46:42,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:46:42,066 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:42,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1300005243, now seen corresponding path program 1 times [2023-11-12 00:46:42,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:42,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761060452] [2023-11-12 00:46:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:42,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:42,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:42,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761060452] [2023-11-12 00:46:42,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761060452] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:42,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:42,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:46:42,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643149322] [2023-11-12 00:46:42,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:42,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:46:42,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:42,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:46:42,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:46:42,298 INFO L87 Difference]: Start difference. First operand 145 states and 164 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:42,435 INFO L93 Difference]: Finished difference Result 214 states and 251 transitions. [2023-11-12 00:46:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:46:42,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2023-11-12 00:46:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:42,437 INFO L225 Difference]: With dead ends: 214 [2023-11-12 00:46:42,438 INFO L226 Difference]: Without dead ends: 145 [2023-11-12 00:46:42,438 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 [2023-11-12 00:46:42,439 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 364 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:42,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 132 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-12 00:46:42,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-12 00:46:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.125) internal successors, (162), 144 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2023-11-12 00:46:42,445 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 99 [2023-11-12 00:46:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:42,445 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2023-11-12 00:46:42,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2023-11-12 00:46:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-12 00:46:42,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:42,447 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] [2023-11-12 00:46:42,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:46:42,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:42,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:42,448 INFO L85 PathProgramCache]: Analyzing trace with hash 784574261, now seen corresponding path program 1 times [2023-11-12 00:46:42,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:42,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047178744] [2023-11-12 00:46:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:42,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:06,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:06,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047178744] [2023-11-12 00:47:06,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047178744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:06,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:06,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2023-11-12 00:47:06,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755828683] [2023-11-12 00:47:06,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:06,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-12 00:47:06,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-12 00:47:06,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2077, Unknown=0, NotChecked=0, Total=2256 [2023-11-12 00:47:06,452 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)