./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label27.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label27.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ab24122cfbae27f78ca86ca1d1162f9de3aff1954d8424bcfc24fa3959df5e7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:54:14,289 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:54:14,411 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:54:14,425 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:54:14,426 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:54:14,464 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:54:14,465 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:54:14,466 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:54:14,468 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:54:14,473 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:54:14,474 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:54:14,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:54:14,476 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:54:14,478 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:54:14,478 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:54:14,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:54:14,479 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:54:14,480 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:54:14,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:54:14,481 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:54:14,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:54:14,482 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:54:14,482 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:54:14,483 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:54:14,483 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:54:14,483 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:54:14,484 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:54:14,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:54:14,485 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:54:14,486 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:54:14,487 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:54:14,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:54:14,488 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:54:14,488 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:54:14,488 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:54:14,488 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:54:14,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:54:14,489 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:54:14,489 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:54:14,489 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:54:14,490 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:54:14,490 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:54:14,490 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ab24122cfbae27f78ca86ca1d1162f9de3aff1954d8424bcfc24fa3959df5e7 [2023-11-26 11:54:14,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:54:14,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:54:14,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:54:14,879 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:54:14,879 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:54:14,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem19_label27.c [2023-11-26 11:54:17,961 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:54:18,781 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:54:18,783 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/sv-benchmarks/c/eca-rers2012/Problem19_label27.c [2023-11-26 11:54:18,852 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme/data/98e3b170f/672a45f8ae30450bb29de032b22378d8/FLAG6e6178e1c [2023-11-26 11:54:18,872 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme/data/98e3b170f/672a45f8ae30450bb29de032b22378d8 [2023-11-26 11:54:18,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:54:18,880 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:54:18,884 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:54:18,884 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:54:18,890 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:54:18,890 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:54:18" (1/1) ... [2023-11-26 11:54:18,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e102d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:18, skipping insertion in model container [2023-11-26 11:54:18,892 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:54:18" (1/1) ... [2023-11-26 11:54:19,159 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:54:19,603 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_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/sv-benchmarks/c/eca-rers2012/Problem19_label27.c[3867,3880] [2023-11-26 11:54:21,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:54:21,604 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:54:21,646 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_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/sv-benchmarks/c/eca-rers2012/Problem19_label27.c[3867,3880] [2023-11-26 11:54:22,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:54:22,815 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:54:22,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:22 WrapperNode [2023-11-26 11:54:22,816 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:54:22,817 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:54:22,817 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:54:22,818 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:54:22,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:22" (1/1) ... [2023-11-26 11:54:23,002 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:22" (1/1) ... [2023-11-26 11:54:24,112 INFO L138 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9426 [2023-11-26 11:54:24,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:54:24,122 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:54:24,122 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:54:24,122 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:54:24,135 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:22" (1/1) ... [2023-11-26 11:54:24,135 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:22" (1/1) ... [2023-11-26 11:54:24,341 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:22" (1/1) ... [2023-11-26 11:54:24,770 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:54:24,770 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:22" (1/1) ... [2023-11-26 11:54:24,771 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:22" (1/1) ... [2023-11-26 11:54:25,239 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:22" (1/1) ... [2023-11-26 11:54:25,293 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:22" (1/1) ... [2023-11-26 11:54:25,330 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:22" (1/1) ... [2023-11-26 11:54:25,356 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:22" (1/1) ... [2023-11-26 11:54:25,545 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:54:25,547 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:54:25,548 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:54:25,549 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:54:25,550 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:22" (1/1) ... [2023-11-26 11:54:25,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:54:25,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:25,591 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:54:25,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5c6930-1b72-4e31-aedf-97dc84d9f2eb/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:54:25,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:54:25,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:54:25,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:54:25,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:54:25,775 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:54:25,778 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:54:37,271 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:54:37,368 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:54:37,369 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:54:37,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:54:37 BoogieIcfgContainer [2023-11-26 11:54:37,370 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:54:37,374 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:54:37,374 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:54:37,378 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:54:37,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:54:18" (1/3) ... [2023-11-26 11:54:37,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4550b491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:54:37, skipping insertion in model container [2023-11-26 11:54:37,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:22" (2/3) ... [2023-11-26 11:54:37,380 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4550b491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:54:37, skipping insertion in model container [2023-11-26 11:54:37,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:54:37" (3/3) ... [2023-11-26 11:54:37,381 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label27.c [2023-11-26 11:54:37,403 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:54:37,404 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:54:37,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:54:37,504 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=PETRI_NET, 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;@235c40dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:54:37,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:54:37,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 1686 states, 1684 states have (on average 1.902019002375297) internal successors, (3203), 1685 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:37,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 11:54:37,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:37,524 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] [2023-11-26 11:54:37,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:54:37,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:37,531 INFO L85 PathProgramCache]: Analyzing trace with hash -610410894, now seen corresponding path program 1 times [2023-11-26 11:54:37,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:37,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136073187] [2023-11-26 11:54:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:37,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:37,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:37,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136073187] [2023-11-26 11:54:37,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136073187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:37,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:37,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:54:37,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678188401] [2023-11-26 11:54:37,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:37,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:54:37,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:37,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:54:37,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:54:37,766 INFO L87 Difference]: Start difference. First operand has 1686 states, 1684 states have (on average 1.902019002375297) internal successors, (3203), 1685 states have internal predecessors, (3203), 0 states have call successors, (0), 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 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:37,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:37,925 INFO L93 Difference]: Finished difference Result 3371 states and 6405 transitions. [2023-11-26 11:54:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:54:37,928 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2023-11-26 11:54:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:38,050 INFO L225 Difference]: With dead ends: 3371 [2023-11-26 11:54:38,050 INFO L226 Difference]: Without dead ends: 1684 [2023-11-26 11:54:38,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:54:38,062 INFO L413 NwaCegarLoop]: 3138 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3138 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:38,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3138 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:54:38,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2023-11-26 11:54:38,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1684. [2023-11-26 11:54:38,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 1.8645276292335116) internal successors, (3138), 1683 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 3138 transitions. [2023-11-26 11:54:38,205 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 3138 transitions. Word has length 26 [2023-11-26 11:54:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:38,205 INFO L495 AbstractCegarLoop]: Abstraction has 1684 states and 3138 transitions. [2023-11-26 11:54:38,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 3138 transitions. [2023-11-26 11:54:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 11:54:38,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:38,207 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] [2023-11-26 11:54:38,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:54:38,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:54:38,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:38,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1147911688, now seen corresponding path program 1 times [2023-11-26 11:54:38,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:38,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122843499] [2023-11-26 11:54:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:38,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:38,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:38,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122843499] [2023-11-26 11:54:38,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122843499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:38,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:38,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:54:38,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076825704] [2023-11-26 11:54:38,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:38,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:54:38,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:38,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:54:38,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:54:38,411 INFO L87 Difference]: Start difference. First operand 1684 states and 3138 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:48,476 INFO L93 Difference]: Finished difference Result 4862 states and 9131 transitions. [2023-11-26 11:54:48,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:54:48,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2023-11-26 11:54:48,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:48,506 INFO L225 Difference]: With dead ends: 4862 [2023-11-26 11:54:48,506 INFO L226 Difference]: Without dead ends: 3179 [2023-11-26 11:54:48,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:54:48,511 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 1621 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 4141 mSolverCounterSat, 2020 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 6161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2020 IncrementalHoareTripleChecker+Valid, 4141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:48,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1621 Valid, 1110 Invalid, 6161 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2020 Valid, 4141 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2023-11-26 11:54:48,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3179 states. [2023-11-26 11:54:48,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3179 to 3121. [2023-11-26 11:54:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3121 states, 3120 states have (on average 1.728525641025641) internal successors, (5393), 3120 states have internal predecessors, (5393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:48,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 5393 transitions. [2023-11-26 11:54:48,621 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 5393 transitions. Word has length 26 [2023-11-26 11:54:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:48,622 INFO L495 AbstractCegarLoop]: Abstraction has 3121 states and 5393 transitions. [2023-11-26 11:54:48,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 5393 transitions. [2023-11-26 11:54:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-26 11:54:48,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:48,628 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:48,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:54:48,628 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:54:48,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:48,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1643074267, now seen corresponding path program 1 times [2023-11-26 11:54:48,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:48,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108804958] [2023-11-26 11:54:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:48,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:48,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:48,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108804958] [2023-11-26 11:54:48,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108804958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:48,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:48,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:54:48,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285759428] [2023-11-26 11:54:48,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:48,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:54:48,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:48,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:54:48,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:54:48,954 INFO L87 Difference]: Start difference. First operand 3121 states and 5393 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 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) [2023-11-26 11:55:00,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:00,539 INFO L93 Difference]: Finished difference Result 9134 states and 15859 transitions. [2023-11-26 11:55:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:55:00,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 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 [2023-11-26 11:55:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:00,579 INFO L225 Difference]: With dead ends: 9134 [2023-11-26 11:55:00,580 INFO L226 Difference]: Without dead ends: 6014 [2023-11-26 11:55:00,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:00,587 INFO L413 NwaCegarLoop]: 719 mSDtfsCounter, 2533 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 5119 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2533 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 5553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:00,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2533 Valid, 990 Invalid, 5553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5119 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2023-11-26 11:55:00,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6014 states. [2023-11-26 11:55:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6014 to 6012. [2023-11-26 11:55:00,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 1.6709366162036268) internal successors, (10044), 6011 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 10044 transitions. [2023-11-26 11:55:00,782 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 10044 transitions. Word has length 94 [2023-11-26 11:55:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:00,785 INFO L495 AbstractCegarLoop]: Abstraction has 6012 states and 10044 transitions. [2023-11-26 11:55:00,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 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) [2023-11-26 11:55:00,786 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 10044 transitions. [2023-11-26 11:55:00,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-26 11:55:00,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:00,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:00,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:55:00,799 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:00,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1096367520, now seen corresponding path program 1 times [2023-11-26 11:55:00,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:00,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517139881] [2023-11-26 11:55:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:00,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:01,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:01,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517139881] [2023-11-26 11:55:01,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517139881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:01,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:01,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:55:01,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22557580] [2023-11-26 11:55:01,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:01,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:55:01,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:01,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:55:01,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:01,102 INFO L87 Difference]: Start difference. First operand 6012 states and 10044 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 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)