./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem18_label05.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_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI --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 d1b880f3deb97bdbbf7c11e97cbf5ecd616b00539f1d96d544b9d037b9f9e706 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:48:19,634 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:48:19,717 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:48:19,722 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:48:19,722 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:48:19,751 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:48:19,751 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:48:19,752 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:48:19,753 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:48:19,753 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:48:19,754 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:48:19,755 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:48:19,756 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:48:19,756 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:48:19,757 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:48:19,758 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:48:19,758 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:48:19,759 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:48:19,759 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:48:19,760 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:48:19,761 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:48:19,761 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:48:19,762 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:48:19,763 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:48:19,763 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:48:19,764 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:48:19,764 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:48:19,765 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:48:19,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:48:19,766 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:48:19,766 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:48:19,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:48:19,767 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:48:19,767 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:48:19,768 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:48:19,768 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:48:19,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:48:19,768 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:48:19,769 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:48:19,769 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:48:19,769 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:48:19,770 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:48:19,770 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_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1b880f3deb97bdbbf7c11e97cbf5ecd616b00539f1d96d544b9d037b9f9e706 [2023-11-24 21:48:20,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:48:20,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:48:20,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:48:20,045 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:48:20,046 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:48:20,048 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem18_label05.c [2023-11-24 21:48:23,333 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:48:23,943 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:48:23,945 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/sv-benchmarks/c/eca-rers2012/Problem18_label05.c [2023-11-24 21:48:23,981 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/data/7cb1be7c9/339edb38edb84c88a26a643d7628f844/FLAGfe18658e1 [2023-11-24 21:48:24,004 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/data/7cb1be7c9/339edb38edb84c88a26a643d7628f844 [2023-11-24 21:48:24,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:48:24,017 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:48:24,019 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:48:24,019 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:48:24,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:48:24,029 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:48:24" (1/1) ... [2023-11-24 21:48:24,030 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc2d8c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:24, skipping insertion in model container [2023-11-24 21:48:24,031 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:48:24" (1/1) ... [2023-11-24 21:48:24,181 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:48:24,488 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_3872e5f4-344c-4f3f-a5b3-196c14fe6568/sv-benchmarks/c/eca-rers2012/Problem18_label05.c[4165,4178] [2023-11-24 21:48:25,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:48:25,379 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:48:25,412 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_3872e5f4-344c-4f3f-a5b3-196c14fe6568/sv-benchmarks/c/eca-rers2012/Problem18_label05.c[4165,4178] [2023-11-24 21:48:25,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:48:25,929 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:48:25,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:25 WrapperNode [2023-11-24 21:48:25,930 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:48:25,946 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:48:25,946 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:48:25,946 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:48:25,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:25" (1/1) ... [2023-11-24 21:48:26,018 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:25" (1/1) ... [2023-11-24 21:48:26,221 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4133 [2023-11-24 21:48:26,222 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:48:26,223 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:48:26,223 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:48:26,223 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:48:26,235 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:25" (1/1) ... [2023-11-24 21:48:26,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:25" (1/1) ... [2023-11-24 21:48:26,261 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:25" (1/1) ... [2023-11-24 21:48:26,390 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]. [2023-11-24 21:48:26,391 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:25" (1/1) ... [2023-11-24 21:48:26,391 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:25" (1/1) ... [2023-11-24 21:48:26,498 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:25" (1/1) ... [2023-11-24 21:48:26,529 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:25" (1/1) ... [2023-11-24 21:48:26,543 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:25" (1/1) ... [2023-11-24 21:48:26,557 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:25" (1/1) ... [2023-11-24 21:48:26,600 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:48:26,602 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:48:26,602 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:48:26,603 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:48:26,604 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:25" (1/1) ... [2023-11-24 21:48:26,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:48:26,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:26,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:48:26,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:48:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:48:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:48:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:48:26,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:48:26,772 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:48:26,775 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:48:30,972 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:48:31,049 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:48:31,051 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:48:31,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:48:31 BoogieIcfgContainer [2023-11-24 21:48:31,052 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:48:31,059 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:48:31,059 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:48:31,062 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:48:31,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:48:24" (1/3) ... [2023-11-24 21:48:31,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1b1863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:48:31, skipping insertion in model container [2023-11-24 21:48:31,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:25" (2/3) ... [2023-11-24 21:48:31,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1b1863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:48:31, skipping insertion in model container [2023-11-24 21:48:31,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:48:31" (3/3) ... [2023-11-24 21:48:31,068 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label05.c [2023-11-24 21:48:31,090 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:48:31,091 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:48:31,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:48:31,203 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;@5d54d02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:48:31,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:48:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 695 states, 693 states have (on average 1.9942279942279941) internal successors, (1382), 694 states have internal predecessors, (1382), 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) [2023-11-24 21:48:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-24 21:48:31,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:31,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:31,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:48:31,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:31,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1005544647, now seen corresponding path program 1 times [2023-11-24 21:48:31,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:31,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585082091] [2023-11-24 21:48:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:31,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:31,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:31,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585082091] [2023-11-24 21:48:31,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585082091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:31,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:31,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:48:31,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596013243] [2023-11-24 21:48:31,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:31,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:48:31,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:31,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:48:31,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:48:31,504 INFO L87 Difference]: Start difference. First operand has 695 states, 693 states have (on average 1.9942279942279941) internal successors, (1382), 694 states have internal predecessors, (1382), 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 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2023-11-24 21:48:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:31,633 INFO L93 Difference]: Finished difference Result 1389 states and 2763 transitions. [2023-11-24 21:48:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:48:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2023-11-24 21:48:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:31,658 INFO L225 Difference]: With dead ends: 1389 [2023-11-24 21:48:31,658 INFO L226 Difference]: Without dead ends: 693 [2023-11-24 21:48:31,665 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 [2023-11-24 21:48:31,669 INFO L413 NwaCegarLoop]: 1317 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, 1317 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 [2023-11-24 21:48:31,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1317 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:31,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-11-24 21:48:31,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2023-11-24 21:48:31,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 1.903179190751445) internal successors, (1317), 692 states have internal predecessors, (1317), 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) [2023-11-24 21:48:31,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1317 transitions. [2023-11-24 21:48:31,766 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1317 transitions. Word has length 37 [2023-11-24 21:48:31,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:31,767 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 1317 transitions. [2023-11-24 21:48:31,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2023-11-24 21:48:31,768 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1317 transitions. [2023-11-24 21:48:31,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-24 21:48:31,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:31,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:31,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:48:31,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:48:31,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2010148763, now seen corresponding path program 1 times [2023-11-24 21:48:31,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:31,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536799830] [2023-11-24 21:48:31,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:31,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:32,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:32,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536799830] [2023-11-24 21:48:32,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536799830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:32,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:32,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:32,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622804917] [2023-11-24 21:48:32,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:32,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:48:32,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:32,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:48:32,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:32,070 INFO L87 Difference]: Start difference. First operand 693 states and 1317 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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) [2023-11-24 21:48:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:39,282 INFO L93 Difference]: Finished difference Result 2765 states and 5263 transitions. [2023-11-24 21:48:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:48:39,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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 37 [2023-11-24 21:48:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:39,297 INFO L225 Difference]: With dead ends: 2765 [2023-11-24 21:48:39,298 INFO L226 Difference]: Without dead ends: 2073 [2023-11-24 21:48:39,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:39,302 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 2016 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 5102 mSolverCounterSat, 951 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2016 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 6053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 951 IncrementalHoareTripleChecker+Valid, 5102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:39,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2016 Valid, 640 Invalid, 6053 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [951 Valid, 5102 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-11-24 21:48:39,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2023-11-24 21:48:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 2073. [2023-11-24 21:48:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 1.5535714285714286) internal successors, (3219), 2072 states have internal predecessors, (3219), 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) [2023-11-24 21:48:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3219 transitions. [2023-11-24 21:48:39,377 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3219 transitions. Word has length 37 [2023-11-24 21:48:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:39,378 INFO L495 AbstractCegarLoop]: Abstraction has 2073 states and 3219 transitions. [2023-11-24 21:48:39,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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) [2023-11-24 21:48:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3219 transitions. [2023-11-24 21:48:39,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-24 21:48:39,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:39,383 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:39,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:48:39,384 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:48:39,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:39,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1676713255, now seen corresponding path program 1 times [2023-11-24 21:48:39,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:39,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24560174] [2023-11-24 21:48:39,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:39,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:40,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:40,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24560174] [2023-11-24 21:48:40,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24560174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:40,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:40,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:40,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674610615] [2023-11-24 21:48:40,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:40,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:48:40,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:40,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:48:40,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:40,254 INFO L87 Difference]: Start difference. First operand 2073 states and 3219 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:45,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:45,869 INFO L93 Difference]: Finished difference Result 6215 states and 9539 transitions. [2023-11-24 21:48:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:48:45,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2023-11-24 21:48:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:45,906 INFO L225 Difference]: With dead ends: 6215 [2023-11-24 21:48:45,906 INFO L226 Difference]: Without dead ends: 4143 [2023-11-24 21:48:45,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:45,915 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 1922 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4115 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1922 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 4629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 4115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:45,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1922 Valid, 645 Invalid, 4629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 4115 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-24 21:48:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2023-11-24 21:48:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4143. [2023-11-24 21:48:46,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4143 states, 4142 states have (on average 1.291405118300338) internal successors, (5349), 4142 states have internal predecessors, (5349), 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) [2023-11-24 21:48:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4143 states to 4143 states and 5349 transitions. [2023-11-24 21:48:46,026 INFO L78 Accepts]: Start accepts. Automaton has 4143 states and 5349 transitions. Word has length 130 [2023-11-24 21:48:46,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:46,030 INFO L495 AbstractCegarLoop]: Abstraction has 4143 states and 5349 transitions. [2023-11-24 21:48:46,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4143 states and 5349 transitions. [2023-11-24 21:48:46,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-11-24 21:48:46,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:46,039 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:46,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:48:46,040 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:48:46,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:46,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1273019308, now seen corresponding path program 1 times [2023-11-24 21:48:46,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:46,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395515588] [2023-11-24 21:48:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:46,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:46,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:46,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395515588] [2023-11-24 21:48:46,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395515588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:46,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:46,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:46,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970487175] [2023-11-24 21:48:46,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:46,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:48:46,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:46,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:48:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:48:46,317 INFO L87 Difference]: Start difference. First operand 4143 states and 5349 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2023-11-24 21:48:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:49,676 INFO L93 Difference]: Finished difference Result 8975 states and 12516 transitions. [2023-11-24 21:48:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:48:49,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 219 [2023-11-24 21:48:49,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:49,709 INFO L225 Difference]: With dead ends: 8975 [2023-11-24 21:48:49,709 INFO L226 Difference]: Without dead ends: 5523 [2023-11-24 21:48:49,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:48:49,716 INFO L413 NwaCegarLoop]: 1061 mSDtfsCounter, 678 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 2757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:49,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1067 Invalid, 2757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [885 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-24 21:48:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2023-11-24 21:48:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 5523. [2023-11-24 21:48:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5523 states, 5522 states have (on average 1.3044186888808402) internal successors, (7203), 5522 states have internal predecessors, (7203), 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) [2023-11-24 21:48:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5523 states to 5523 states and 7203 transitions. [2023-11-24 21:48:49,845 INFO L78 Accepts]: Start accepts. Automaton has 5523 states and 7203 transitions. Word has length 219 [2023-11-24 21:48:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:49,846 INFO L495 AbstractCegarLoop]: Abstraction has 5523 states and 7203 transitions. [2023-11-24 21:48:49,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2023-11-24 21:48:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5523 states and 7203 transitions. [2023-11-24 21:48:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-24 21:48:49,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:49,854 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:49,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:48:49,855 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:48:49,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:49,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1677113911, now seen corresponding path program 1 times [2023-11-24 21:48:49,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:49,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477080014] [2023-11-24 21:48:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:49,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:50,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:50,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477080014] [2023-11-24 21:48:50,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477080014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:50,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:50,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:50,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057724313] [2023-11-24 21:48:50,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:50,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:48:50,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:50,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:48:50,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:50,497 INFO L87 Difference]: Start difference. First operand 5523 states and 7203 transitions. Second operand has 4 states, 4 states have (on average 77.5) internal successors, (310), 3 states have internal predecessors, (310), 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) [2023-11-24 21:48:54,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:54,553 INFO L93 Difference]: Finished difference Result 13168 states and 17885 transitions. [2023-11-24 21:48:54,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:48:54,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.5) internal successors, (310), 3 states have internal predecessors, (310), 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 310 [2023-11-24 21:48:54,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:54,595 INFO L225 Difference]: With dead ends: 13168 [2023-11-24 21:48:54,596 INFO L226 Difference]: Without dead ends: 8283 [2023-11-24 21:48:54,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:54,603 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 513 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3038 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 3835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 3038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:54,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 634 Invalid, 3835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 3038 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-24 21:48:54,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8283 states. [2023-11-24 21:48:54,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8283 to 7593. [2023-11-24 21:48:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7593 states, 7592 states have (on average 1.1596417281348788) internal successors, (8804), 7592 states have internal predecessors, (8804), 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) [2023-11-24 21:48:54,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7593 states to 7593 states and 8804 transitions. [2023-11-24 21:48:54,793 INFO L78 Accepts]: Start accepts. Automaton has 7593 states and 8804 transitions. Word has length 310 [2023-11-24 21:48:54,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:54,794 INFO L495 AbstractCegarLoop]: Abstraction has 7593 states and 8804 transitions. [2023-11-24 21:48:54,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.5) internal successors, (310), 3 states have internal predecessors, (310), 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) [2023-11-24 21:48:54,794 INFO L276 IsEmpty]: Start isEmpty. Operand 7593 states and 8804 transitions. [2023-11-24 21:48:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2023-11-24 21:48:54,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:54,829 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:54,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:48:54,830 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:48:54,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:54,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1135562147, now seen corresponding path program 1 times [2023-11-24 21:48:54,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:54,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294934560] [2023-11-24 21:48:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:54,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 107 proven. 6 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2023-11-24 21:48:56,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:56,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294934560] [2023-11-24 21:48:56,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294934560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:56,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840880659] [2023-11-24 21:48:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:56,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:56,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:56,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:48:56,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:48:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:57,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:48:57,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-24 21:48:58,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:48:58,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840880659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:58,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:48:58,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-24 21:48:58,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738698493] [2023-11-24 21:48:58,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:58,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:48:58,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:58,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:48:58,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:58,612 INFO L87 Difference]: Start difference. First operand 7593 states and 8804 transitions. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 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) [2023-11-24 21:49:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:01,895 INFO L93 Difference]: Finished difference Result 17255 states and 20819 transitions. [2023-11-24 21:49:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:01,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 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 920 [2023-11-24 21:49:01,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:01,943 INFO L225 Difference]: With dead ends: 17255 [2023-11-24 21:49:01,943 INFO L226 Difference]: Without dead ends: 10353 [2023-11-24 21:49:01,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 919 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:49:01,954 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 226 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 2270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:01,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 387 Invalid, 2270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 1668 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-24 21:49:01,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10353 states. [2023-11-24 21:49:02,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10353 to 9663. [2023-11-24 21:49:02,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9663 states, 9662 states have (on average 1.1434485613744567) internal successors, (11048), 9662 states have internal predecessors, (11048), 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) [2023-11-24 21:49:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9663 states to 9663 states and 11048 transitions. [2023-11-24 21:49:02,151 INFO L78 Accepts]: Start accepts. Automaton has 9663 states and 11048 transitions. Word has length 920 [2023-11-24 21:49:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:02,153 INFO L495 AbstractCegarLoop]: Abstraction has 9663 states and 11048 transitions. [2023-11-24 21:49:02,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 2 states have internal predecessors, (555), 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) [2023-11-24 21:49:02,154 INFO L276 IsEmpty]: Start isEmpty. Operand 9663 states and 11048 transitions. [2023-11-24 21:49:02,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 970 [2023-11-24 21:49:02,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:02,194 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:02,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:02,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3872e5f4-344c-4f3f-a5b3-196c14fe6568/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 21:49:02,412 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:02,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:02,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1763020292, now seen corresponding path program 1 times [2023-11-24 21:49:02,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:02,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102961369] [2023-11-24 21:49:02,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:02,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-11-24 21:49:04,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:04,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102961369] [2023-11-24 21:49:04,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102961369] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:04,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:04,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:49:04,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600865372] [2023-11-24 21:49:04,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:04,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:04,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:04,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:04,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:04,232 INFO L87 Difference]: Start difference. First operand 9663 states and 11048 transitions. Second operand has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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) [2023-11-24 21:49:07,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:07,533 INFO L93 Difference]: Finished difference Result 23465 states and 27254 transitions. [2023-11-24 21:49:07,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:49:07,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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 969 [2023-11-24 21:49:07,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:07,576 INFO L225 Difference]: With dead ends: 23465 [2023-11-24 21:49:07,577 INFO L226 Difference]: Without dead ends: 14493 [2023-11-24 21:49:07,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:07,592 INFO L413 NwaCegarLoop]: 1083 mSDtfsCounter, 574 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 2387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:07,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 1089 Invalid, 2387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-24 21:49:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14493 states. [2023-11-24 21:49:07,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14493 to 13803. [2023-11-24 21:49:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13803 states, 13802 states have (on average 1.1293290827416316) internal successors, (15587), 13802 states have internal predecessors, (15587), 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) [2023-11-24 21:49:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13803 states to 13803 states and 15587 transitions. [2023-11-24 21:49:07,980 INFO L78 Accepts]: Start accepts. Automaton has 13803 states and 15587 transitions. Word has length 969 [2023-11-24 21:49:07,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:07,984 INFO L495 AbstractCegarLoop]: Abstraction has 13803 states and 15587 transitions. [2023-11-24 21:49:07,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 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) [2023-11-24 21:49:07,985 INFO L276 IsEmpty]: Start isEmpty. Operand 13803 states and 15587 transitions. [2023-11-24 21:49:08,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 980 [2023-11-24 21:49:08,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:08,022 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:08,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:49:08,026 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:49:08,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:08,028 INFO L85 PathProgramCache]: Analyzing trace with hash -573049176, now seen corresponding path program 1 times [2023-11-24 21:49:08,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:08,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966161458] [2023-11-24 21:49:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:08,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 349 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2023-11-24 21:49:09,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:09,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966161458] [2023-11-24 21:49:09,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966161458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:49:09,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:49:09,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:49:09,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063387594] [2023-11-24 21:49:09,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:49:09,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:49:09,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:09,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:49:09,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:49:09,130 INFO L87 Difference]: Start difference. First operand 13803 states and 15587 transitions. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 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)