./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eb4732ffcc8aec7b756fbc1474109f3a44e8146c5a6c10619dc86e06d247c798 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:13:52,254 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:13:52,325 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:13:52,331 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:13:52,332 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:13:52,360 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:13:52,361 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:13:52,362 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:13:52,363 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:13:52,363 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:13:52,364 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:13:52,364 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:13:52,365 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:13:52,365 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:13:52,366 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:13:52,367 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:13:52,367 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:13:52,368 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:13:52,368 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:13:52,369 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:13:52,369 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:13:52,375 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:13:52,375 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:13:52,376 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:13:52,376 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:13:52,377 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:13:52,377 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:13:52,377 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:13:52,378 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:13:52,378 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:13:52,379 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:13:52,379 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:13:52,379 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:13:52,380 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:13:52,380 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:13:52,380 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:13:52,380 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:13:52,381 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:13:52,381 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:13:52,381 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:13:52,381 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:13:52,382 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:13:52,382 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:13:52,382 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:13:52,382 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:13:52,383 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:13:52,383 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:13:52,383 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_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb4732ffcc8aec7b756fbc1474109f3a44e8146c5a6c10619dc86e06d247c798 [2023-12-02 17:13:52,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:13:52,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:13:52,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:13:52,685 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:13:52,686 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:13:52,687 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2023-12-02 17:13:55,676 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:13:56,077 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:13:56,078 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2023-12-02 17:13:56,107 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh/data/ad044e3c9/149d970fb95c4a36b54384be8c22fef9/FLAG58dcb1b9e [2023-12-02 17:13:56,122 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh/data/ad044e3c9/149d970fb95c4a36b54384be8c22fef9 [2023-12-02 17:13:56,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:13:56,126 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:13:56,127 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:13:56,128 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:13:56,133 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:13:56,134 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:13:56" (1/1) ... [2023-12-02 17:13:56,135 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@242d5079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:13:56, skipping insertion in model container [2023-12-02 17:13:56,135 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:13:56" (1/1) ... [2023-12-02 17:13:56,265 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:13:56,591 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_f1a8a1fb-967e-4d5d-882c-c26c1c377889/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c[8749,8762] [2023-12-02 17:13:56,652 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_f1a8a1fb-967e-4d5d-882c-c26c1c377889/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c[15810,15823] [2023-12-02 17:13:57,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:13:57,473 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:13:57,506 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_f1a8a1fb-967e-4d5d-882c-c26c1c377889/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c[8749,8762] [2023-12-02 17:13:57,520 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_f1a8a1fb-967e-4d5d-882c-c26c1c377889/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c[15810,15823] [2023-12-02 17:13:58,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:13:58,079 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:13:58,080 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:13:58 WrapperNode [2023-12-02 17:13:58,080 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:13:58,081 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:13:58,081 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:13:58,082 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:13:58,089 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:13:58" (1/1) ... [2023-12-02 17:13:58,148 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:13:58" (1/1) ... [2023-12-02 17:13:58,477 INFO L138 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5035 [2023-12-02 17:13:58,478 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:13:58,478 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:13:58,479 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:13:58,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:13:58,488 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:13:58" (1/1) ... [2023-12-02 17:13:58,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:13:58" (1/1) ... [2023-12-02 17:13:58,537 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:13:58" (1/1) ... [2023-12-02 17:13:58,538 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:13:58" (1/1) ... [2023-12-02 17:13:58,683 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:13:58" (1/1) ... [2023-12-02 17:13:58,707 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:13:58" (1/1) ... [2023-12-02 17:13:58,769 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:13:58" (1/1) ... [2023-12-02 17:13:58,784 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:13:58" (1/1) ... [2023-12-02 17:13:58,898 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:13:58,899 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:13:58,899 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:13:58,899 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:13:58,900 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:13:58" (1/1) ... [2023-12-02 17:13:58,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:13:58,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:13:58,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:13:58,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1a8a1fb-967e-4d5d-882c-c26c1c377889/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:13:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:13:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:13:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:13:58,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:13:59,069 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:13:59,071 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:14:03,670 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:16:15,235 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:16:15,235 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 17:16:15,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:16:15 BoogieIcfgContainer [2023-12-02 17:16:15,237 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:16:15,239 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:16:15,239 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:16:15,242 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:16:15,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:13:56" (1/3) ... [2023-12-02 17:16:15,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5157d279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:16:15, skipping insertion in model container [2023-12-02 17:16:15,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:13:58" (2/3) ... [2023-12-02 17:16:15,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5157d279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:16:15, skipping insertion in model container [2023-12-02 17:16:15,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:16:15" (3/3) ... [2023-12-02 17:16:15,244 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label04.c [2023-12-02 17:16:15,260 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:16:15,261 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 17:16:15,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:16:15,309 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;@7a78ee9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:16:15,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 17:16:15,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:16:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 17:16:15,319 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:15,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 17:16:15,320 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:15,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:15,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1048916954, now seen corresponding path program 1 times [2023-12-02 17:16:15,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:15,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984283493] [2023-12-02 17:16:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:15,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:16:15,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:15,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984283493] [2023-12-02 17:16:15,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984283493] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:16:15,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:16:15,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:16:15,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097965327] [2023-12-02 17:16:15,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:16:15,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:16:15,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:15,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:16:15,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:16:15,632 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:16:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:16,628 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2023-12-02 17:16:16,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:16:16,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2023-12-02 17:16:16,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:16,640 INFO L225 Difference]: With dead ends: 47 [2023-12-02 17:16:16,640 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 17:16:16,643 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 [2023-12-02 17:16:16,647 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:16,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 20 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 17:16:16,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 17:16:16,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-12-02 17:16:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:16:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-02 17:16:16,681 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 6 [2023-12-02 17:16:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:16,681 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-02 17:16:16,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:16:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-02 17:16:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 17:16:16,682 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:16,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:16:16,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:16:16,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:16,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:16,684 INFO L85 PathProgramCache]: Analyzing trace with hash -894739634, now seen corresponding path program 1 times [2023-12-02 17:16:16,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:16,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152547481] [2023-12-02 17:16:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:16,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:16:17,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:17,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152547481] [2023-12-02 17:16:17,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152547481] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:16:17,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:16:17,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:16:17,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719467289] [2023-12-02 17:16:17,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:16:17,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:16:17,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:17,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:16:17,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:16:17,532 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:16:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:18,223 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-12-02 17:16:18,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:16:18,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2023-12-02 17:16:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:18,225 INFO L225 Difference]: With dead ends: 42 [2023-12-02 17:16:18,225 INFO L226 Difference]: Without dead ends: 32 [2023-12-02 17:16:18,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:16:18,227 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:18,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 25 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:16:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-02 17:16:18,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2023-12-02 17:16:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:16:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-12-02 17:16:18,235 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 7 [2023-12-02 17:16:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:18,235 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-12-02 17:16:18,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:16:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-12-02 17:16:18,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 17:16:18,236 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:18,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:16:18,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:16:18,237 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:18,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:18,237 INFO L85 PathProgramCache]: Analyzing trace with hash -851663467, now seen corresponding path program 1 times [2023-12-02 17:16:18,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:18,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159843294] [2023-12-02 17:16:18,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:18,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:16:18,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:18,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159843294] [2023-12-02 17:16:18,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159843294] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:16:18,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:16:18,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:16:18,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745095839] [2023-12-02 17:16:18,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:16:18,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:16:18,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:18,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:16:18,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:16:18,477 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:16:19,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:19,093 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2023-12-02 17:16:19,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:16:19,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2023-12-02 17:16:19,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:19,095 INFO L225 Difference]: With dead ends: 42 [2023-12-02 17:16:19,095 INFO L226 Difference]: Without dead ends: 32 [2023-12-02 17:16:19,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:16:19,097 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:19,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 30 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:16:19,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-02 17:16:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2023-12-02 17:16:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:16:19,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-12-02 17:16:19,105 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 9 [2023-12-02 17:16:19,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:19,105 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-12-02 17:16:19,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:16:19,106 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-12-02 17:16:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 17:16:19,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:19,106 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 17:16:19,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:16:19,107 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:19,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:19,107 INFO L85 PathProgramCache]: Analyzing trace with hash -710647130, now seen corresponding path program 1 times [2023-12-02 17:16:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:19,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901959791] [2023-12-02 17:16:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:19,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat