./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label41.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_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/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_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label41.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/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_9b4f931e-f03e-4875-aafe-7508859e3af4/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 50ebe5851919469bd2115fd9df4bc67f7eb85dba2d380b6a5ab23ed124700184 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:01:01,858 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:01:01,964 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:01:01,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:01:01,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:01:01,998 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:01:01,999 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:01:02,000 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:01:02,001 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:01:02,001 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:01:02,002 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:01:02,003 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:01:02,003 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:01:02,004 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:01:02,005 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:01:02,005 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:01:02,006 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:01:02,006 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:01:02,007 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:01:02,007 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:01:02,008 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:01:02,009 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:01:02,009 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:01:02,010 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:01:02,010 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:01:02,011 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:01:02,011 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:01:02,012 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:01:02,012 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:01:02,013 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:01:02,013 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:01:02,014 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:01:02,015 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:01:02,016 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:01:02,016 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:01:02,017 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:01:02,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:01:02,018 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:01:02,018 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:01:02,018 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:01:02,018 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:01:02,019 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:01:02,020 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_9b4f931e-f03e-4875-aafe-7508859e3af4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50ebe5851919469bd2115fd9df4bc67f7eb85dba2d380b6a5ab23ed124700184 [2023-11-24 22:01:02,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:01:02,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:01:02,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:01:02,377 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:01:02,377 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:01:02,378 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem16_label41.c [2023-11-24 22:01:05,595 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:01:06,035 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:01:06,036 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/sv-benchmarks/c/eca-rers2012/Problem16_label41.c [2023-11-24 22:01:06,068 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/data/4376bfda6/5e9333a8039f4d97bcb2e8bf43b72adc/FLAG565e4a45c [2023-11-24 22:01:06,088 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/data/4376bfda6/5e9333a8039f4d97bcb2e8bf43b72adc [2023-11-24 22:01:06,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:01:06,093 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:01:06,095 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:01:06,095 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:01:06,105 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:01:06,106 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:01:06" (1/1) ... [2023-11-24 22:01:06,107 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12169cc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:06, skipping insertion in model container [2023-11-24 22:01:06,108 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:01:06" (1/1) ... [2023-11-24 22:01:06,203 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:01:06,392 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_9b4f931e-f03e-4875-aafe-7508859e3af4/sv-benchmarks/c/eca-rers2012/Problem16_label41.c[2609,2622] [2023-11-24 22:01:06,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:01:06,925 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:01:06,943 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_9b4f931e-f03e-4875-aafe-7508859e3af4/sv-benchmarks/c/eca-rers2012/Problem16_label41.c[2609,2622] [2023-11-24 22:01:07,225 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:01:07,246 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:01:07,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:07 WrapperNode [2023-11-24 22:01:07,247 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:01:07,249 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:01:07,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:01:07,250 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:01:07,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:07" (1/1) ... [2023-11-24 22:01:07,309 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:07" (1/1) ... [2023-11-24 22:01:07,456 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1769 [2023-11-24 22:01:07,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:01:07,458 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:01:07,458 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:01:07,458 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:01:07,469 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:07" (1/1) ... [2023-11-24 22:01:07,469 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:07" (1/1) ... [2023-11-24 22:01:07,482 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:07" (1/1) ... [2023-11-24 22:01:07,596 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 22:01:07,596 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:07" (1/1) ... [2023-11-24 22:01:07,597 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:07" (1/1) ... [2023-11-24 22:01:07,693 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:07" (1/1) ... [2023-11-24 22:01:07,708 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:07" (1/1) ... [2023-11-24 22:01:07,731 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:07" (1/1) ... [2023-11-24 22:01:07,741 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:07" (1/1) ... [2023-11-24 22:01:07,766 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:01:07,768 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:01:07,768 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:01:07,768 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:01:07,769 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:07" (1/1) ... [2023-11-24 22:01:07,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:01:07,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:01:07,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:01:07,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:01:07,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:01:07,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:01:07,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:01:07,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:01:07,945 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:01:07,947 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:01:10,487 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:01:10,537 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:01:10,538 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 22:01:10,539 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:01:10 BoogieIcfgContainer [2023-11-24 22:01:10,539 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:01:10,541 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:01:10,542 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:01:10,545 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:01:10,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:01:06" (1/3) ... [2023-11-24 22:01:10,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c2e7b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:01:10, skipping insertion in model container [2023-11-24 22:01:10,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:01:07" (2/3) ... [2023-11-24 22:01:10,547 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c2e7b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:01:10, skipping insertion in model container [2023-11-24 22:01:10,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:01:10" (3/3) ... [2023-11-24 22:01:10,549 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label41.c [2023-11-24 22:01:10,568 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:01:10,569 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 22:01:10,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:01:10,659 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;@33d26d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:01:10,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 22:01:10,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 334 states, 332 states have (on average 1.9909638554216869) internal successors, (661), 333 states have internal predecessors, (661), 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 22:01:10,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 22:01:10,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:10,673 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] [2023-11-24 22:01:10,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:10,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2089943998, now seen corresponding path program 1 times [2023-11-24 22:01:10,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:10,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516589570] [2023-11-24 22:01:10,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:10,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:10,836 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 22:01:10,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:10,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516589570] [2023-11-24 22:01:10,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516589570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:10,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:10,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:10,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049261967] [2023-11-24 22:01:10,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:10,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 22:01:10,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:10,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 22:01:10,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 22:01:10,879 INFO L87 Difference]: Start difference. First operand has 334 states, 332 states have (on average 1.9909638554216869) internal successors, (661), 333 states have internal predecessors, (661), 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 11.0) internal successors, (22), 2 states have internal predecessors, (22), 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 22:01:10,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:10,942 INFO L93 Difference]: Finished difference Result 667 states and 1321 transitions. [2023-11-24 22:01:10,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 22:01:10,945 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 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 22 [2023-11-24 22:01:10,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:10,959 INFO L225 Difference]: With dead ends: 667 [2023-11-24 22:01:10,960 INFO L226 Difference]: Without dead ends: 332 [2023-11-24 22:01:10,964 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 22:01:10,968 INFO L413 NwaCegarLoop]: 596 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, 596 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 22:01:10,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 596 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:01:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-11-24 22:01:11,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2023-11-24 22:01:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.8006042296072509) internal successors, (596), 331 states have internal predecessors, (596), 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 22:01:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 596 transitions. [2023-11-24 22:01:11,031 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 596 transitions. Word has length 22 [2023-11-24 22:01:11,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:11,031 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 596 transitions. [2023-11-24 22:01:11,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 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 22:01:11,032 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 596 transitions. [2023-11-24 22:01:11,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 22:01:11,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:11,033 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] [2023-11-24 22:01:11,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:01:11,034 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:11,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:11,035 INFO L85 PathProgramCache]: Analyzing trace with hash 590653196, now seen corresponding path program 1 times [2023-11-24 22:01:11,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:11,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159723271] [2023-11-24 22:01:11,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:11,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:11,202 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 22:01:11,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:11,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159723271] [2023-11-24 22:01:11,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159723271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:11,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:11,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:11,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049663386] [2023-11-24 22:01:11,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:11,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:11,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:11,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:11,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:11,206 INFO L87 Difference]: Start difference. First operand 332 states and 596 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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 22:01:13,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:13,481 INFO L93 Difference]: Finished difference Result 992 states and 1785 transitions. [2023-11-24 22:01:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:13,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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 22 [2023-11-24 22:01:13,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:13,488 INFO L225 Difference]: With dead ends: 992 [2023-11-24 22:01:13,489 INFO L226 Difference]: Without dead ends: 661 [2023-11-24 22:01:13,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:13,493 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 327 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:13,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 77 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-24 22:01:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2023-11-24 22:01:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 661. [2023-11-24 22:01:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 1.7015151515151514) internal successors, (1123), 660 states have internal predecessors, (1123), 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 22:01:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1123 transitions. [2023-11-24 22:01:13,539 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1123 transitions. Word has length 22 [2023-11-24 22:01:13,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:13,540 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 1123 transitions. [2023-11-24 22:01:13,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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 22:01:13,541 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1123 transitions. [2023-11-24 22:01:13,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-24 22:01:13,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:13,545 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 22:01:13,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:01:13,545 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:13,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:13,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1542712116, now seen corresponding path program 1 times [2023-11-24 22:01:13,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:13,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813825363] [2023-11-24 22:01:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:13,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:13,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:13,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813825363] [2023-11-24 22:01:13,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813825363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:13,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:13,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:13,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387797552] [2023-11-24 22:01:13,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:13,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:13,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:13,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:13,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:13,830 INFO L87 Difference]: Start difference. First operand 661 states and 1123 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 22:01:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:15,764 INFO L93 Difference]: Finished difference Result 1979 states and 3366 transitions. [2023-11-24 22:01:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:15,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 88 [2023-11-24 22:01:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:15,773 INFO L225 Difference]: With dead ends: 1979 [2023-11-24 22:01:15,773 INFO L226 Difference]: Without dead ends: 1319 [2023-11-24 22:01:15,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:15,779 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 343 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:15,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 75 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-24 22:01:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2023-11-24 22:01:15,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1319. [2023-11-24 22:01:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 1.6206373292867982) internal successors, (2136), 1318 states have internal predecessors, (2136), 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 22:01:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 2136 transitions. [2023-11-24 22:01:15,837 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 2136 transitions. Word has length 88 [2023-11-24 22:01:15,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:15,837 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 2136 transitions. [2023-11-24 22:01:15,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 22:01:15,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 2136 transitions. [2023-11-24 22:01:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-24 22:01:15,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:15,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:15,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:01:15,842 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:15,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:15,843 INFO L85 PathProgramCache]: Analyzing trace with hash 195390710, now seen corresponding path program 1 times [2023-11-24 22:01:15,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:15,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509645415] [2023-11-24 22:01:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:15,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:15,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:15,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509645415] [2023-11-24 22:01:15,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509645415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:15,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:15,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:15,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011774227] [2023-11-24 22:01:15,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:15,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:15,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:15,977 INFO L87 Difference]: Start difference. First operand 1319 states and 2136 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 22:01:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:17,733 INFO L93 Difference]: Finished difference Result 3295 states and 5284 transitions. [2023-11-24 22:01:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:17,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 89 [2023-11-24 22:01:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:17,745 INFO L225 Difference]: With dead ends: 3295 [2023-11-24 22:01:17,746 INFO L226 Difference]: Without dead ends: 1977 [2023-11-24 22:01:17,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:17,749 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 381 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:17,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 153 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-24 22:01:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2023-11-24 22:01:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1977. [2023-11-24 22:01:17,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1976 states have (on average 1.33248987854251) internal successors, (2633), 1976 states have internal predecessors, (2633), 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 22:01:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2633 transitions. [2023-11-24 22:01:17,801 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2633 transitions. Word has length 89 [2023-11-24 22:01:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:17,802 INFO L495 AbstractCegarLoop]: Abstraction has 1977 states and 2633 transitions. [2023-11-24 22:01:17,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 22:01:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2633 transitions. [2023-11-24 22:01:17,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-24 22:01:17,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:17,809 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 22:01:17,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:01:17,810 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:17,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:17,810 INFO L85 PathProgramCache]: Analyzing trace with hash 151747740, now seen corresponding path program 1 times [2023-11-24 22:01:17,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:17,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660868797] [2023-11-24 22:01:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:17,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:18,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:18,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660868797] [2023-11-24 22:01:18,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660868797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:18,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:18,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:01:18,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669025531] [2023-11-24 22:01:18,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:18,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:18,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:18,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:18,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:18,176 INFO L87 Difference]: Start difference. First operand 1977 states and 2633 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 22:01:19,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:19,881 INFO L93 Difference]: Finished difference Result 5927 states and 7896 transitions. [2023-11-24 22:01:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:19,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 181 [2023-11-24 22:01:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:19,942 INFO L225 Difference]: With dead ends: 5927 [2023-11-24 22:01:19,943 INFO L226 Difference]: Without dead ends: 3951 [2023-11-24 22:01:19,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:19,948 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 183 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:19,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 255 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-24 22:01:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2023-11-24 22:01:20,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3951. [2023-11-24 22:01:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3951 states, 3950 states have (on average 1.2172151898734178) internal successors, (4808), 3950 states have internal predecessors, (4808), 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 22:01:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3951 states to 3951 states and 4808 transitions. [2023-11-24 22:01:20,056 INFO L78 Accepts]: Start accepts. Automaton has 3951 states and 4808 transitions. Word has length 181 [2023-11-24 22:01:20,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:20,058 INFO L495 AbstractCegarLoop]: Abstraction has 3951 states and 4808 transitions. [2023-11-24 22:01:20,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 22:01:20,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3951 states and 4808 transitions. [2023-11-24 22:01:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-11-24 22:01:20,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:20,065 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-11-24 22:01:20,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:01:20,066 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:20,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:20,066 INFO L85 PathProgramCache]: Analyzing trace with hash 534834606, now seen corresponding path program 1 times [2023-11-24 22:01:20,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:20,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942936701] [2023-11-24 22:01:20,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:20,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:01:20,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:20,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942936701] [2023-11-24 22:01:20,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942936701] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:01:20,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538934744] [2023-11-24 22:01:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:20,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:01:20,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:01:20,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:01:20,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:01:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:20,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:01:21,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-24 22:01:21,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:21,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538934744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:21,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:01:21,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-24 22:01:21,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231410729] [2023-11-24 22:01:21,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:21,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:21,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:21,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:21,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 22:01:21,431 INFO L87 Difference]: Start difference. First operand 3951 states and 4808 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 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 22:01:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:23,098 INFO L93 Difference]: Finished difference Result 5269 states and 6253 transitions. [2023-11-24 22:01:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:23,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 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 265 [2023-11-24 22:01:23,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:23,128 INFO L225 Difference]: With dead ends: 5269 [2023-11-24 22:01:23,129 INFO L226 Difference]: Without dead ends: 5267 [2023-11-24 22:01:23,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 264 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 22:01:23,132 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 109 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:23,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 156 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-24 22:01:23,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2023-11-24 22:01:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 4609. [2023-11-24 22:01:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4609 states, 4608 states have (on average 1.2013888888888888) internal successors, (5536), 4608 states have internal predecessors, (5536), 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 22:01:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4609 states to 4609 states and 5536 transitions. [2023-11-24 22:01:23,268 INFO L78 Accepts]: Start accepts. Automaton has 4609 states and 5536 transitions. Word has length 265 [2023-11-24 22:01:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:23,269 INFO L495 AbstractCegarLoop]: Abstraction has 4609 states and 5536 transitions. [2023-11-24 22:01:23,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 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 22:01:23,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4609 states and 5536 transitions. [2023-11-24 22:01:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-11-24 22:01:23,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:23,278 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:01:23,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:23,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 22:01:23,484 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:23,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:23,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1219700941, now seen corresponding path program 1 times [2023-11-24 22:01:23,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:23,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321273942] [2023-11-24 22:01:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:23,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 22:01:24,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:24,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321273942] [2023-11-24 22:01:24,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321273942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:24,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:24,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:01:24,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583625357] [2023-11-24 22:01:24,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:24,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:01:24,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:24,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:01:24,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:01:24,364 INFO L87 Difference]: Start difference. First operand 4609 states and 5536 transitions. Second operand has 4 states, 4 states have (on average 88.5) internal successors, (354), 3 states have internal predecessors, (354), 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 22:01:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:26,258 INFO L93 Difference]: Finished difference Result 9559 states and 11425 transitions. [2023-11-24 22:01:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 22:01:26,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.5) internal successors, (354), 3 states have internal predecessors, (354), 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 374 [2023-11-24 22:01:26,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:26,284 INFO L225 Difference]: With dead ends: 9559 [2023-11-24 22:01:26,284 INFO L226 Difference]: Without dead ends: 4951 [2023-11-24 22:01:26,289 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 22:01:26,291 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 173 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:26,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 362 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-24 22:01:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2023-11-24 22:01:26,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 4938. [2023-11-24 22:01:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4938 states, 4937 states have (on average 1.1891837148065627) internal successors, (5871), 4937 states have internal predecessors, (5871), 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 22:01:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 5871 transitions. [2023-11-24 22:01:26,408 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 5871 transitions. Word has length 374 [2023-11-24 22:01:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:26,409 INFO L495 AbstractCegarLoop]: Abstraction has 4938 states and 5871 transitions. [2023-11-24 22:01:26,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.5) internal successors, (354), 3 states have internal predecessors, (354), 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 22:01:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 5871 transitions. [2023-11-24 22:01:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-24 22:01:26,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:26,420 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:01:26,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 22:01:26,422 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:26,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:26,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1512985152, now seen corresponding path program 1 times [2023-11-24 22:01:26,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:26,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921125679] [2023-11-24 22:01:26,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:26,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-11-24 22:01:27,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:27,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921125679] [2023-11-24 22:01:27,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921125679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:27,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:27,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:01:27,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656941576] [2023-11-24 22:01:27,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:27,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:27,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:27,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:27,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:27,082 INFO L87 Difference]: Start difference. First operand 4938 states and 5871 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 22:01:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:28,766 INFO L93 Difference]: Finished difference Result 11849 states and 14301 transitions. [2023-11-24 22:01:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:28,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 436 [2023-11-24 22:01:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:28,799 INFO L225 Difference]: With dead ends: 11849 [2023-11-24 22:01:28,799 INFO L226 Difference]: Without dead ends: 5925 [2023-11-24 22:01:28,807 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 22:01:28,809 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 361 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:28,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 537 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-24 22:01:28,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5925 states. [2023-11-24 22:01:28,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5925 to 5925. [2023-11-24 22:01:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5925 states, 5924 states have (on average 1.061444969615125) internal successors, (6288), 5924 states have internal predecessors, (6288), 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 22:01:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5925 states to 5925 states and 6288 transitions. [2023-11-24 22:01:28,954 INFO L78 Accepts]: Start accepts. Automaton has 5925 states and 6288 transitions. Word has length 436 [2023-11-24 22:01:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:28,957 INFO L495 AbstractCegarLoop]: Abstraction has 5925 states and 6288 transitions. [2023-11-24 22:01:28,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 22:01:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 5925 states and 6288 transitions. [2023-11-24 22:01:28,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2023-11-24 22:01:28,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:28,985 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2023-11-24 22:01:28,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 22:01:28,986 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:28,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:28,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1701785299, now seen corresponding path program 1 times [2023-11-24 22:01:28,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:28,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000153752] [2023-11-24 22:01:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:28,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 836 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-24 22:01:29,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000153752] [2023-11-24 22:01:29,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000153752] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:29,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:29,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:01:29,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169506675] [2023-11-24 22:01:29,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:29,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:29,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:29,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:29,858 INFO L87 Difference]: Start difference. First operand 5925 states and 6288 transitions. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 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 22:01:31,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:31,163 INFO L93 Difference]: Finished difference Result 14481 states and 15473 transitions. [2023-11-24 22:01:31,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:31,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 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 678 [2023-11-24 22:01:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:31,206 INFO L225 Difference]: With dead ends: 14481 [2023-11-24 22:01:31,206 INFO L226 Difference]: Without dead ends: 8886 [2023-11-24 22:01:31,213 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 22:01:31,214 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 219 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:31,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 423 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 22:01:31,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8886 states. [2023-11-24 22:01:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8886 to 8557. [2023-11-24 22:01:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8557 states, 8556 states have (on average 1.0483870967741935) internal successors, (8970), 8556 states have internal predecessors, (8970), 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 22:01:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8557 states to 8557 states and 8970 transitions. [2023-11-24 22:01:31,387 INFO L78 Accepts]: Start accepts. Automaton has 8557 states and 8970 transitions. Word has length 678 [2023-11-24 22:01:31,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:31,388 INFO L495 AbstractCegarLoop]: Abstraction has 8557 states and 8970 transitions. [2023-11-24 22:01:31,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 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 22:01:31,388 INFO L276 IsEmpty]: Start isEmpty. Operand 8557 states and 8970 transitions. [2023-11-24 22:01:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 781 [2023-11-24 22:01:31,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:31,425 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-24 22:01:31,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 22:01:31,425 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:31,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:31,426 INFO L85 PathProgramCache]: Analyzing trace with hash 884448146, now seen corresponding path program 1 times [2023-11-24 22:01:31,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:31,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084992076] [2023-11-24 22:01:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:31,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 803 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-24 22:01:32,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:32,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084992076] [2023-11-24 22:01:32,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084992076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:32,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:32,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:01:32,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18568832] [2023-11-24 22:01:32,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:32,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:32,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:32,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:32,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:32,248 INFO L87 Difference]: Start difference. First operand 8557 states and 8970 transitions. Second operand has 3 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 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 22:01:33,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:33,427 INFO L93 Difference]: Finished difference Result 19416 states and 20483 transitions. [2023-11-24 22:01:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:33,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 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 780 [2023-11-24 22:01:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:33,446 INFO L225 Difference]: With dead ends: 19416 [2023-11-24 22:01:33,446 INFO L226 Difference]: Without dead ends: 11189 [2023-11-24 22:01:33,454 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 22:01:33,455 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 175 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:33,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 411 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 22:01:33,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11189 states. [2023-11-24 22:01:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11189 to 10531. [2023-11-24 22:01:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10531 states, 10530 states have (on average 1.0454890788224123) internal successors, (11009), 10530 states have internal predecessors, (11009), 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 22:01:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10531 states to 10531 states and 11009 transitions. [2023-11-24 22:01:33,630 INFO L78 Accepts]: Start accepts. Automaton has 10531 states and 11009 transitions. Word has length 780 [2023-11-24 22:01:33,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:33,631 INFO L495 AbstractCegarLoop]: Abstraction has 10531 states and 11009 transitions. [2023-11-24 22:01:33,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 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 22:01:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 10531 states and 11009 transitions. [2023-11-24 22:01:33,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1039 [2023-11-24 22:01:33,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:33,656 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:33,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 22:01:33,657 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:33,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:33,658 INFO L85 PathProgramCache]: Analyzing trace with hash -850617526, now seen corresponding path program 1 times [2023-11-24 22:01:33,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:33,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564801454] [2023-11-24 22:01:33,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:33,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 1414 proven. 0 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2023-11-24 22:01:34,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:34,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564801454] [2023-11-24 22:01:34,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564801454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:34,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:34,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:01:34,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875983080] [2023-11-24 22:01:34,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:34,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:34,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:34,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:34,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:34,836 INFO L87 Difference]: Start difference. First operand 10531 states and 11009 transitions. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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 22:01:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:36,133 INFO L93 Difference]: Finished difference Result 23693 states and 24915 transitions. [2023-11-24 22:01:36,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:36,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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 1038 [2023-11-24 22:01:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:36,157 INFO L225 Difference]: With dead ends: 23693 [2023-11-24 22:01:36,157 INFO L226 Difference]: Without dead ends: 13492 [2023-11-24 22:01:36,168 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 22:01:36,169 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 220 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:36,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 430 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 22:01:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13492 states. [2023-11-24 22:01:36,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13492 to 12834. [2023-11-24 22:01:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12834 states, 12833 states have (on average 1.0409101535104808) internal successors, (13358), 12833 states have internal predecessors, (13358), 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 22:01:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12834 states to 12834 states and 13358 transitions. [2023-11-24 22:01:36,378 INFO L78 Accepts]: Start accepts. Automaton has 12834 states and 13358 transitions. Word has length 1038 [2023-11-24 22:01:36,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:36,380 INFO L495 AbstractCegarLoop]: Abstraction has 12834 states and 13358 transitions. [2023-11-24 22:01:36,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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 22:01:36,381 INFO L276 IsEmpty]: Start isEmpty. Operand 12834 states and 13358 transitions. [2023-11-24 22:01:36,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1040 [2023-11-24 22:01:36,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:36,407 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:36,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 22:01:36,409 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:36,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:36,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1369695045, now seen corresponding path program 1 times [2023-11-24 22:01:36,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:36,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110626409] [2023-11-24 22:01:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:36,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 763 proven. 784 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2023-11-24 22:01:38,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:38,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110626409] [2023-11-24 22:01:38,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110626409] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:01:38,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406079176] [2023-11-24 22:01:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:38,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:01:38,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:01:38,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:01:38,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:01:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:39,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 1225 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:01:39,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 1130 proven. 0 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2023-11-24 22:01:39,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:01:39,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406079176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:39,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:01:39,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-24 22:01:39,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222161005] [2023-11-24 22:01:39,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:39,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:39,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:39,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:39,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:01:39,635 INFO L87 Difference]: Start difference. First operand 12834 states and 13358 transitions. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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 22:01:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:40,648 INFO L93 Difference]: Finished difference Result 25338 states and 26384 transitions. [2023-11-24 22:01:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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 1039 [2023-11-24 22:01:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:40,672 INFO L225 Difference]: With dead ends: 25338 [2023-11-24 22:01:40,673 INFO L226 Difference]: Without dead ends: 12834 [2023-11-24 22:01:40,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1043 GetRequests, 1039 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:01:40,733 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 117 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:40,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 374 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 22:01:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2023-11-24 22:01:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 12834. [2023-11-24 22:01:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12834 states, 12833 states have (on average 1.0363905555988466) internal successors, (13300), 12833 states have internal predecessors, (13300), 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 22:01:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12834 states to 12834 states and 13300 transitions. [2023-11-24 22:01:40,894 INFO L78 Accepts]: Start accepts. Automaton has 12834 states and 13300 transitions. Word has length 1039 [2023-11-24 22:01:40,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:40,895 INFO L495 AbstractCegarLoop]: Abstraction has 12834 states and 13300 transitions. [2023-11-24 22:01:40,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 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 22:01:40,896 INFO L276 IsEmpty]: Start isEmpty. Operand 12834 states and 13300 transitions. [2023-11-24 22:01:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1211 [2023-11-24 22:01:40,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:40,925 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:40,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:41,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b4f931e-f03e-4875-aafe-7508859e3af4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 22:01:41,132 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:41,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:41,133 INFO L85 PathProgramCache]: Analyzing trace with hash -197659487, now seen corresponding path program 1 times [2023-11-24 22:01:41,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:41,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938535994] [2023-11-24 22:01:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:41,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2754 backedges. 941 proven. 0 refuted. 0 times theorem prover too weak. 1813 trivial. 0 not checked. [2023-11-24 22:01:42,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:42,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938535994] [2023-11-24 22:01:42,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938535994] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:42,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:42,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:01:42,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882331195] [2023-11-24 22:01:42,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:42,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:01:42,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:42,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:01:42,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:01:42,347 INFO L87 Difference]: Start difference. First operand 12834 states and 13300 transitions. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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 22:01:43,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:43,423 INFO L93 Difference]: Finished difference Result 27641 states and 28661 transitions. [2023-11-24 22:01:43,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:01:43,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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 1210 [2023-11-24 22:01:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:43,448 INFO L225 Difference]: With dead ends: 27641 [2023-11-24 22:01:43,448 INFO L226 Difference]: Without dead ends: 13492 [2023-11-24 22:01:43,460 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 22:01:43,461 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 170 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:43,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 409 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 22:01:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13492 states. [2023-11-24 22:01:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13492 to 11518. [2023-11-24 22:01:43,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11518 states, 11517 states have (on average 1.0298688894677432) internal successors, (11861), 11517 states have internal predecessors, (11861), 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 22:01:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11518 states to 11518 states and 11861 transitions. [2023-11-24 22:01:43,712 INFO L78 Accepts]: Start accepts. Automaton has 11518 states and 11861 transitions. Word has length 1210 [2023-11-24 22:01:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:43,714 INFO L495 AbstractCegarLoop]: Abstraction has 11518 states and 11861 transitions. [2023-11-24 22:01:43,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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 22:01:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 11518 states and 11861 transitions. [2023-11-24 22:01:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1537 [2023-11-24 22:01:43,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:43,749 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2023-11-24 22:01:43,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 22:01:43,750 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:01:43,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:43,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1252196106, now seen corresponding path program 1 times [2023-11-24 22:01:43,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:43,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959213539] [2023-11-24 22:01:43,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:43,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4195 backedges. 2950 proven. 0 refuted. 0 times theorem prover too weak. 1245 trivial. 0 not checked. [2023-11-24 22:01:46,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:46,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959213539] [2023-11-24 22:01:46,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959213539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:01:46,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:01:46,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:01:46,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647129507] [2023-11-24 22:01:46,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:01:46,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:01:46,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:46,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:01:46,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:01:46,778 INFO L87 Difference]: Start difference. First operand 11518 states and 11861 transitions. Second operand has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 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)