./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya --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 a5deaf1c7eecf4d76182f6b98ab14efecb2cf3c3c2e7d8162af75087f90c331b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:56:49,568 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:56:49,638 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:56:49,643 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:56:49,643 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:56:49,666 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:56:49,667 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:56:49,667 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:56:49,668 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:56:49,668 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:56:49,669 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:56:49,670 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:56:49,670 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:56:49,671 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:56:49,671 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:56:49,672 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:56:49,673 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:56:49,673 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:56:49,674 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:56:49,674 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:56:49,674 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:56:49,675 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:56:49,675 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:56:49,676 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:56:49,676 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:56:49,677 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:56:49,677 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:56:49,678 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:56:49,678 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:56:49,679 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:56:49,679 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:56:49,679 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:56:49,680 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:56:49,680 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:56:49,680 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:56:49,681 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:56:49,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:56:49,681 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:56:49,682 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:56:49,682 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:56:49,682 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:56:49,682 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:56:49,683 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_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5deaf1c7eecf4d76182f6b98ab14efecb2cf3c3c2e7d8162af75087f90c331b [2023-11-29 01:56:49,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:56:49,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:56:49,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:56:49,956 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:56:49,957 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:56:49,958 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c [2023-11-29 01:56:52,697 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:56:52,885 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:56:52,886 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c [2023-11-29 01:56:52,897 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/data/d1306bf65/880160918d3c4249b6a3fe6ad44f8f6d/FLAG6cc6f8aec [2023-11-29 01:56:52,912 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/data/d1306bf65/880160918d3c4249b6a3fe6ad44f8f6d [2023-11-29 01:56:52,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:56:52,916 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:56:52,917 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:56:52,918 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:56:52,922 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:56:52,923 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:56:52" (1/1) ... [2023-11-29 01:56:52,924 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2243dda6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:52, skipping insertion in model container [2023-11-29 01:56:52,924 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:56:52" (1/1) ... [2023-11-29 01:56:52,956 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:56:53,146 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_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c[6844,6857] [2023-11-29 01:56:53,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:56:53,163 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:56:53,203 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_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c[6844,6857] [2023-11-29 01:56:53,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:56:53,221 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:56:53,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:53 WrapperNode [2023-11-29 01:56:53,222 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:56:53,223 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:56:53,223 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:56:53,224 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:56:53,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:53" (1/1) ... [2023-11-29 01:56:53,239 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:53" (1/1) ... [2023-11-29 01:56:53,267 INFO L138 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 244 [2023-11-29 01:56:53,268 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:56:53,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:56:53,269 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:56:53,269 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:56:53,300 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:53" (1/1) ... [2023-11-29 01:56:53,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:53" (1/1) ... [2023-11-29 01:56:53,309 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:53" (1/1) ... [2023-11-29 01:56:53,333 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]. [2023-11-29 01:56:53,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:53" (1/1) ... [2023-11-29 01:56:53,334 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:53" (1/1) ... [2023-11-29 01:56:53,341 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:53" (1/1) ... [2023-11-29 01:56:53,346 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:53" (1/1) ... [2023-11-29 01:56:53,348 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:53" (1/1) ... [2023-11-29 01:56:53,350 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:53" (1/1) ... [2023-11-29 01:56:53,354 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:56:53,355 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:56:53,355 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:56:53,355 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:56:53,356 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:53" (1/1) ... [2023-11-29 01:56:53,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:56:53,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:53,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:56:53,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:56:53,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:56:53,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:56:53,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:56:53,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:56:53,491 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:56:53,493 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:56:53,780 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:56:53,817 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:56:53,817 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 01:56:53,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:56:53 BoogieIcfgContainer [2023-11-29 01:56:53,818 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:56:53,820 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:56:53,820 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:56:53,823 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:56:53,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:56:52" (1/3) ... [2023-11-29 01:56:53,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3a9819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:56:53, skipping insertion in model container [2023-11-29 01:56:53,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:56:53" (2/3) ... [2023-11-29 01:56:53,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3a9819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:56:53, skipping insertion in model container [2023-11-29 01:56:53,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:56:53" (3/3) ... [2023-11-29 01:56:53,826 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c [2023-11-29 01:56:53,841 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:56:53,841 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:56:53,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:56:53,889 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;@1223a09f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:56:53,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:56:53,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 60 states have (on average 1.7666666666666666) internal successors, (106), 61 states have internal predecessors, (106), 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) [2023-11-29 01:56:53,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 01:56:53,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:53,900 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] [2023-11-29 01:56:53,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:53,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:53,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1479912418, now seen corresponding path program 1 times [2023-11-29 01:56:53,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:53,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085771576] [2023-11-29 01:56:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:53,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:54,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:54,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085771576] [2023-11-29 01:56:54,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085771576] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:54,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:54,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:56:54,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666463078] [2023-11-29 01:56:54,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:54,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:56:54,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:54,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:56:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:56:54,283 INFO L87 Difference]: Start difference. First operand has 62 states, 60 states have (on average 1.7666666666666666) internal successors, (106), 61 states have internal predecessors, (106), 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 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2023-11-29 01:56:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:54,366 INFO L93 Difference]: Finished difference Result 145 states and 243 transitions. [2023-11-29 01:56:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:56:54,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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 [2023-11-29 01:56:54,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:54,378 INFO L225 Difference]: With dead ends: 145 [2023-11-29 01:56:54,378 INFO L226 Difference]: Without dead ends: 99 [2023-11-29 01:56:54,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:56:54,385 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 62 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:54,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 270 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:56:54,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-29 01:56:54,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 60. [2023-11-29 01:56:54,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.423728813559322) internal successors, (84), 59 states have internal predecessors, (84), 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) [2023-11-29 01:56:54,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2023-11-29 01:56:54,425 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 22 [2023-11-29 01:56:54,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:54,426 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2023-11-29 01:56:54,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2023-11-29 01:56:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2023-11-29 01:56:54,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 01:56:54,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:54,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:54,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:56:54,429 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:54,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:54,430 INFO L85 PathProgramCache]: Analyzing trace with hash -781461804, now seen corresponding path program 1 times [2023-11-29 01:56:54,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:54,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156344337] [2023-11-29 01:56:54,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:54,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:54,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:54,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156344337] [2023-11-29 01:56:54,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156344337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:54,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:54,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:56:54,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124552331] [2023-11-29 01:56:54,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:54,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:56:54,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:54,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:56:54,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:56:54,599 INFO L87 Difference]: Start difference. First operand 60 states and 84 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-29 01:56:54,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:54,689 INFO L93 Difference]: Finished difference Result 216 states and 336 transitions. [2023-11-29 01:56:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:56:54,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 38 [2023-11-29 01:56:54,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:54,692 INFO L225 Difference]: With dead ends: 216 [2023-11-29 01:56:54,693 INFO L226 Difference]: Without dead ends: 177 [2023-11-29 01:56:54,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:56:54,695 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 354 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:54,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 311 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:56:54,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-29 01:56:54,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 97. [2023-11-29 01:56:54,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.5) internal successors, (144), 96 states have internal predecessors, (144), 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) [2023-11-29 01:56:54,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 144 transitions. [2023-11-29 01:56:54,714 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 144 transitions. Word has length 38 [2023-11-29 01:56:54,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:54,714 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 144 transitions. [2023-11-29 01:56:54,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2023-11-29 01:56:54,715 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 144 transitions. [2023-11-29 01:56:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 01:56:54,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:54,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:54,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:56:54,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:54,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:54,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1531456910, now seen corresponding path program 1 times [2023-11-29 01:56:54,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:54,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685189729] [2023-11-29 01:56:54,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:54,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:54,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:54,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685189729] [2023-11-29 01:56:54,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685189729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:54,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:54,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:56:54,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118454458] [2023-11-29 01:56:54,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:54,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:56:54,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:54,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:56:54,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:56:54,962 INFO L87 Difference]: Start difference. First operand 97 states and 144 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2023-11-29 01:56:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:54,988 INFO L93 Difference]: Finished difference Result 105 states and 153 transitions. [2023-11-29 01:56:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:56:54,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 39 [2023-11-29 01:56:54,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:54,990 INFO L225 Difference]: With dead ends: 105 [2023-11-29 01:56:54,990 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 01:56:54,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:56:54,992 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 1 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:54,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 233 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:56:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 01:56:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2023-11-29 01:56:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.48) internal successors, (148), 100 states have internal predecessors, (148), 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) [2023-11-29 01:56:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 148 transitions. [2023-11-29 01:56:55,002 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 148 transitions. Word has length 39 [2023-11-29 01:56:55,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:55,003 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 148 transitions. [2023-11-29 01:56:55,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2023-11-29 01:56:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 148 transitions. [2023-11-29 01:56:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 01:56:55,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:55,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:55,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 01:56:55,005 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:55,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash 231554364, now seen corresponding path program 1 times [2023-11-29 01:56:55,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:55,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872648086] [2023-11-29 01:56:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:55,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:55,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:55,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872648086] [2023-11-29 01:56:55,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872648086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:55,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:55,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:56:55,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606554034] [2023-11-29 01:56:55,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:55,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:56:55,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:55,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:56:55,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:56:55,082 INFO L87 Difference]: Start difference. First operand 101 states and 148 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-11-29 01:56:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:55,100 INFO L93 Difference]: Finished difference Result 247 states and 378 transitions. [2023-11-29 01:56:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:56:55,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2023-11-29 01:56:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:55,102 INFO L225 Difference]: With dead ends: 247 [2023-11-29 01:56:55,102 INFO L226 Difference]: Without dead ends: 167 [2023-11-29 01:56:55,103 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 [2023-11-29 01:56:55,105 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 36 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:55,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 140 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:56:55,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-29 01:56:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2023-11-29 01:56:55,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5121951219512195) internal successors, (248), 164 states have internal predecessors, (248), 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) [2023-11-29 01:56:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 248 transitions. [2023-11-29 01:56:55,118 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 248 transitions. Word has length 40 [2023-11-29 01:56:55,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:55,119 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 248 transitions. [2023-11-29 01:56:55,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-11-29 01:56:55,119 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 248 transitions. [2023-11-29 01:56:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 01:56:55,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:55,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:55,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 01:56:55,122 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:55,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:55,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1940057635, now seen corresponding path program 1 times [2023-11-29 01:56:55,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:55,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974894211] [2023-11-29 01:56:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:55,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:55,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:55,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974894211] [2023-11-29 01:56:55,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974894211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:55,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:55,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:56:55,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022317854] [2023-11-29 01:56:55,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:55,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:56:55,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:55,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:56:55,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:56:55,177 INFO L87 Difference]: Start difference. First operand 165 states and 248 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-11-29 01:56:55,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:55,199 INFO L93 Difference]: Finished difference Result 311 states and 477 transitions. [2023-11-29 01:56:55,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:56:55,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2023-11-29 01:56:55,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:55,201 INFO L225 Difference]: With dead ends: 311 [2023-11-29 01:56:55,202 INFO L226 Difference]: Without dead ends: 231 [2023-11-29 01:56:55,202 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 [2023-11-29 01:56:55,204 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 51 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:55,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 181 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:56:55,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-11-29 01:56:55,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2023-11-29 01:56:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.5175438596491229) internal successors, (346), 228 states have internal predecessors, (346), 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) [2023-11-29 01:56:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 346 transitions. [2023-11-29 01:56:55,219 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 346 transitions. Word has length 40 [2023-11-29 01:56:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:55,219 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 346 transitions. [2023-11-29 01:56:55,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-11-29 01:56:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 346 transitions. [2023-11-29 01:56:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 01:56:55,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:55,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:55,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 01:56:55,222 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:55,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:55,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1445773387, now seen corresponding path program 1 times [2023-11-29 01:56:55,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:55,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947700071] [2023-11-29 01:56:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:55,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:55,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:55,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947700071] [2023-11-29 01:56:55,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947700071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:55,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:55,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:56:55,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104945897] [2023-11-29 01:56:55,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:55,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:56:55,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:55,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:56:55,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:56:55,276 INFO L87 Difference]: Start difference. First operand 229 states and 346 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-11-29 01:56:55,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:55,302 INFO L93 Difference]: Finished difference Result 593 states and 908 transitions. [2023-11-29 01:56:55,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:56:55,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2023-11-29 01:56:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:55,306 INFO L225 Difference]: With dead ends: 593 [2023-11-29 01:56:55,306 INFO L226 Difference]: Without dead ends: 387 [2023-11-29 01:56:55,307 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 [2023-11-29 01:56:55,308 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 43 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:55,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 168 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:56:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-11-29 01:56:55,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2023-11-29 01:56:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5052083333333333) internal successors, (578), 384 states have internal predecessors, (578), 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) [2023-11-29 01:56:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 578 transitions. [2023-11-29 01:56:55,327 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 578 transitions. Word has length 41 [2023-11-29 01:56:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:55,327 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 578 transitions. [2023-11-29 01:56:55,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-11-29 01:56:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 578 transitions. [2023-11-29 01:56:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 01:56:55,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:55,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:55,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 01:56:55,330 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:55,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:55,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1919502123, now seen corresponding path program 1 times [2023-11-29 01:56:55,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:55,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582786409] [2023-11-29 01:56:55,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:55,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:55,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:55,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582786409] [2023-11-29 01:56:55,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582786409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:55,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:55,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:56:55,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466423702] [2023-11-29 01:56:55,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:55,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:56:55,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:56:55,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:56:55,400 INFO L87 Difference]: Start difference. First operand 385 states and 578 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-11-29 01:56:55,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:55,433 INFO L93 Difference]: Finished difference Result 1013 states and 1520 transitions. [2023-11-29 01:56:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:56:55,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2023-11-29 01:56:55,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:55,437 INFO L225 Difference]: With dead ends: 1013 [2023-11-29 01:56:55,437 INFO L226 Difference]: Without dead ends: 651 [2023-11-29 01:56:55,439 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 [2023-11-29 01:56:55,440 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 47 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:55,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 181 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:56:55,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2023-11-29 01:56:55,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2023-11-29 01:56:55,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.4691358024691359) internal successors, (952), 648 states have internal predecessors, (952), 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) [2023-11-29 01:56:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 952 transitions. [2023-11-29 01:56:55,465 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 952 transitions. Word has length 41 [2023-11-29 01:56:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:55,465 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 952 transitions. [2023-11-29 01:56:55,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-11-29 01:56:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 952 transitions. [2023-11-29 01:56:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 01:56:55,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:55,469 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:56:55,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 01:56:55,469 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:55,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:55,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1974468253, now seen corresponding path program 1 times [2023-11-29 01:56:55,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:55,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704466273] [2023-11-29 01:56:55,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:55,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:55,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:55,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704466273] [2023-11-29 01:56:55,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704466273] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:55,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:55,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:56:55,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368727770] [2023-11-29 01:56:55,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:55,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:56:55,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:55,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:56:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:56:55,578 INFO L87 Difference]: Start difference. First operand 649 states and 952 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2023-11-29 01:56:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:55,607 INFO L93 Difference]: Finished difference Result 1277 states and 1882 transitions. [2023-11-29 01:56:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:56:55,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2023-11-29 01:56:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:55,611 INFO L225 Difference]: With dead ends: 1277 [2023-11-29 01:56:55,611 INFO L226 Difference]: Without dead ends: 651 [2023-11-29 01:56:55,612 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 [2023-11-29 01:56:55,613 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 41 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:55,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 172 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:56:55,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2023-11-29 01:56:55,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2023-11-29 01:56:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.4506172839506173) internal successors, (940), 648 states have internal predecessors, (940), 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) [2023-11-29 01:56:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 940 transitions. [2023-11-29 01:56:55,634 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 940 transitions. Word has length 58 [2023-11-29 01:56:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:55,634 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 940 transitions. [2023-11-29 01:56:55,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2023-11-29 01:56:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 940 transitions. [2023-11-29 01:56:55,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 01:56:55,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:55,636 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:56:55,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 01:56:55,636 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:55,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:55,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1468182908, now seen corresponding path program 1 times [2023-11-29 01:56:55,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:55,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832068122] [2023-11-29 01:56:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:55,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:55,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:55,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832068122] [2023-11-29 01:56:55,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832068122] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:55,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:55,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:56:55,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210885876] [2023-11-29 01:56:55,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:55,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:56:55,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:56:55,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:56:55,720 INFO L87 Difference]: Start difference. First operand 649 states and 940 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2023-11-29 01:56:55,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:55,742 INFO L93 Difference]: Finished difference Result 965 states and 1400 transitions. [2023-11-29 01:56:55,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:56:55,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2023-11-29 01:56:55,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:55,747 INFO L225 Difference]: With dead ends: 965 [2023-11-29 01:56:55,747 INFO L226 Difference]: Without dead ends: 339 [2023-11-29 01:56:55,747 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 [2023-11-29 01:56:55,748 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 35 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:55,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 153 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:56:55,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-11-29 01:56:55,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2023-11-29 01:56:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.4166666666666667) internal successors, (476), 336 states have internal predecessors, (476), 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) [2023-11-29 01:56:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 476 transitions. [2023-11-29 01:56:55,762 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 476 transitions. Word has length 58 [2023-11-29 01:56:55,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:55,762 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 476 transitions. [2023-11-29 01:56:55,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2023-11-29 01:56:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 476 transitions. [2023-11-29 01:56:55,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 01:56:55,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:55,774 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:56:55,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 01:56:55,775 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:55,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:55,775 INFO L85 PathProgramCache]: Analyzing trace with hash 483939365, now seen corresponding path program 1 times [2023-11-29 01:56:55,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:55,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877006781] [2023-11-29 01:56:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:55,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:56:55,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:55,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877006781] [2023-11-29 01:56:55,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877006781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:56:55,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623318001] [2023-11-29 01:56:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:55,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:55,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:55,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:56:55,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:56:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:56,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:56:56,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:56:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:56:56,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:56:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:56:56,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623318001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:56:56,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:56:56,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2023-11-29 01:56:56,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032864167] [2023-11-29 01:56:56,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:56:56,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:56:56,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:56,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:56:56,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:56:56,542 INFO L87 Difference]: Start difference. First operand 337 states and 476 transitions. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 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) [2023-11-29 01:56:56,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:56,613 INFO L93 Difference]: Finished difference Result 953 states and 1372 transitions. [2023-11-29 01:56:56,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:56:56,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 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 58 [2023-11-29 01:56:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:56,618 INFO L225 Difference]: With dead ends: 953 [2023-11-29 01:56:56,618 INFO L226 Difference]: Without dead ends: 735 [2023-11-29 01:56:56,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:56:56,620 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 239 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:56,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 491 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:56:56,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2023-11-29 01:56:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 729. [2023-11-29 01:56:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 1.4230769230769231) internal successors, (1036), 728 states have internal predecessors, (1036), 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) [2023-11-29 01:56:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1036 transitions. [2023-11-29 01:56:56,651 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1036 transitions. Word has length 58 [2023-11-29 01:56:56,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:56,651 INFO L495 AbstractCegarLoop]: Abstraction has 729 states and 1036 transitions. [2023-11-29 01:56:56,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 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) [2023-11-29 01:56:56,651 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1036 transitions. [2023-11-29 01:56:56,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 01:56:56,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:56,652 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:56:56,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-29 01:56:56,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:56:56,853 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:56,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:56,854 INFO L85 PathProgramCache]: Analyzing trace with hash 297441262, now seen corresponding path program 1 times [2023-11-29 01:56:56,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:56,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058258268] [2023-11-29 01:56:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:56,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 01:56:56,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:56,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058258268] [2023-11-29 01:56:56,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058258268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:56,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:56,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:56:56,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563009726] [2023-11-29 01:56:56,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:56,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:56:56,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:56,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:56:56,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:56:56,961 INFO L87 Difference]: Start difference. First operand 729 states and 1036 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2023-11-29 01:56:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:57,059 INFO L93 Difference]: Finished difference Result 1757 states and 2524 transitions. [2023-11-29 01:56:57,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:56:57,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 59 [2023-11-29 01:56:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:57,067 INFO L225 Difference]: With dead ends: 1757 [2023-11-29 01:56:57,067 INFO L226 Difference]: Without dead ends: 1389 [2023-11-29 01:56:57,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:56:57,069 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 221 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:57,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 349 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:56:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2023-11-29 01:56:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1075. [2023-11-29 01:56:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 1.4208566108007448) internal successors, (1526), 1074 states have internal predecessors, (1526), 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) [2023-11-29 01:56:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1526 transitions. [2023-11-29 01:56:57,120 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1526 transitions. Word has length 59 [2023-11-29 01:56:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:57,120 INFO L495 AbstractCegarLoop]: Abstraction has 1075 states and 1526 transitions. [2023-11-29 01:56:57,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2023-11-29 01:56:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1526 transitions. [2023-11-29 01:56:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 01:56:57,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:57,121 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:56:57,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 01:56:57,122 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:57,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:57,122 INFO L85 PathProgramCache]: Analyzing trace with hash 921940976, now seen corresponding path program 1 times [2023-11-29 01:56:57,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:57,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484306804] [2023-11-29 01:56:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:57,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:56:57,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:57,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484306804] [2023-11-29 01:56:57,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484306804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:57,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:57,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:56:57,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837639452] [2023-11-29 01:56:57,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:57,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:56:57,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:57,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:56:57,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:56:57,224 INFO L87 Difference]: Start difference. First operand 1075 states and 1526 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2023-11-29 01:56:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:57,341 INFO L93 Difference]: Finished difference Result 2103 states and 3014 transitions. [2023-11-29 01:56:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:56:57,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 59 [2023-11-29 01:56:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:57,350 INFO L225 Difference]: With dead ends: 2103 [2023-11-29 01:56:57,351 INFO L226 Difference]: Without dead ends: 1735 [2023-11-29 01:56:57,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:56:57,352 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 218 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:57,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 390 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:56:57,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2023-11-29 01:56:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1421. [2023-11-29 01:56:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 1.419718309859155) internal successors, (2016), 1420 states have internal predecessors, (2016), 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) [2023-11-29 01:56:57,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 2016 transitions. [2023-11-29 01:56:57,415 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 2016 transitions. Word has length 59 [2023-11-29 01:56:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:57,415 INFO L495 AbstractCegarLoop]: Abstraction has 1421 states and 2016 transitions. [2023-11-29 01:56:57,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2023-11-29 01:56:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 2016 transitions. [2023-11-29 01:56:57,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 01:56:57,416 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:57,416 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:56:57,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 01:56:57,416 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:57,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:57,417 INFO L85 PathProgramCache]: Analyzing trace with hash -171590031, now seen corresponding path program 1 times [2023-11-29 01:56:57,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:57,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315437500] [2023-11-29 01:56:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:57,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:56:57,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:57,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315437500] [2023-11-29 01:56:57,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315437500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:57,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:57,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:56:57,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399020175] [2023-11-29 01:56:57,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:56:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:57,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:56:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:56:57,514 INFO L87 Difference]: Start difference. First operand 1421 states and 2016 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2023-11-29 01:56:57,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:57,615 INFO L93 Difference]: Finished difference Result 2301 states and 3284 transitions. [2023-11-29 01:56:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:56:57,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 59 [2023-11-29 01:56:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:57,627 INFO L225 Difference]: With dead ends: 2301 [2023-11-29 01:56:57,627 INFO L226 Difference]: Without dead ends: 2027 [2023-11-29 01:56:57,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:56:57,629 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 214 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:57,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 357 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:56:57,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2023-11-29 01:56:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1713. [2023-11-29 01:56:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1712 states have (on average 1.4170560747663552) internal successors, (2426), 1712 states have internal predecessors, (2426), 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) [2023-11-29 01:56:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 2426 transitions. [2023-11-29 01:56:57,702 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 2426 transitions. Word has length 59 [2023-11-29 01:56:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:57,703 INFO L495 AbstractCegarLoop]: Abstraction has 1713 states and 2426 transitions. [2023-11-29 01:56:57,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2023-11-29 01:56:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 2426 transitions. [2023-11-29 01:56:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 01:56:57,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:57,704 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:56:57,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 01:56:57,704 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:57,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:57,705 INFO L85 PathProgramCache]: Analyzing trace with hash -798404966, now seen corresponding path program 1 times [2023-11-29 01:56:57,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:57,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525531837] [2023-11-29 01:56:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:57,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:57,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:57,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525531837] [2023-11-29 01:56:57,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525531837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:57,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:57,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:56:57,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641356532] [2023-11-29 01:56:57,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:57,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:56:57,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:57,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:56:57,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:56:57,806 INFO L87 Difference]: Start difference. First operand 1713 states and 2426 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-11-29 01:56:57,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:57,848 INFO L93 Difference]: Finished difference Result 2448 states and 3457 transitions. [2023-11-29 01:56:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:56:57,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2023-11-29 01:56:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:57,853 INFO L225 Difference]: With dead ends: 2448 [2023-11-29 01:56:57,853 INFO L226 Difference]: Without dead ends: 758 [2023-11-29 01:56:57,855 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 [2023-11-29 01:56:57,855 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 21 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:57,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 143 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:56:57,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2023-11-29 01:56:57,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 731. [2023-11-29 01:56:57,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.384931506849315) internal successors, (1011), 730 states have internal predecessors, (1011), 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) [2023-11-29 01:56:57,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1011 transitions. [2023-11-29 01:56:57,889 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1011 transitions. Word has length 62 [2023-11-29 01:56:57,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:57,890 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 1011 transitions. [2023-11-29 01:56:57,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2023-11-29 01:56:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1011 transitions. [2023-11-29 01:56:57,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 01:56:57,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:57,891 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:56:57,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 01:56:57,891 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:57,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:57,891 INFO L85 PathProgramCache]: Analyzing trace with hash -853694343, now seen corresponding path program 1 times [2023-11-29 01:56:57,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:57,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946825874] [2023-11-29 01:56:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:57,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:56:58,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:58,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946825874] [2023-11-29 01:56:58,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946825874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:56:58,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826191284] [2023-11-29 01:56:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:58,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:58,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:58,434 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:56:58,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:56:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:58,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 01:56:58,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:57:02,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:57:07,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826191284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:07,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:57:07,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18, 20] total 44 [2023-11-29 01:57:07,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121269612] [2023-11-29 01:57:07,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:07,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 01:57:07,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:07,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 01:57:07,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 01:57:07,480 INFO L87 Difference]: Start difference. First operand 731 states and 1011 transitions. Second operand has 44 states, 44 states have (on average 3.7954545454545454) internal successors, (167), 44 states have internal predecessors, (167), 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) [2023-11-29 01:58:03,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:03,085 INFO L93 Difference]: Finished difference Result 13938 states and 18835 transitions. [2023-11-29 01:58:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2023-11-29 01:58:03,086 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.7954545454545454) internal successors, (167), 44 states have internal predecessors, (167), 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 62 [2023-11-29 01:58:03,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:03,145 INFO L225 Difference]: With dead ends: 13938 [2023-11-29 01:58:03,145 INFO L226 Difference]: Without dead ends: 13232 [2023-11-29 01:58:03,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42402 ImplicationChecksByTransitivity, 53.6s TimeCoverageRelationStatistics Valid=16827, Invalid=76503, Unknown=0, NotChecked=0, Total=93330 [2023-11-29 01:58:03,167 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 5334 mSDsluCounter, 1930 mSDsCounter, 0 mSdLazyCounter, 2552 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5334 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 2903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:03,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5334 Valid, 1998 Invalid, 2903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2552 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-29 01:58:03,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13232 states. [2023-11-29 01:58:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13232 to 9354. [2023-11-29 01:58:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9354 states, 9353 states have (on average 1.3541109804340854) internal successors, (12665), 9353 states have internal predecessors, (12665), 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) [2023-11-29 01:58:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9354 states to 9354 states and 12665 transitions. [2023-11-29 01:58:03,538 INFO L78 Accepts]: Start accepts. Automaton has 9354 states and 12665 transitions. Word has length 62 [2023-11-29 01:58:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:03,539 INFO L495 AbstractCegarLoop]: Abstraction has 9354 states and 12665 transitions. [2023-11-29 01:58:03,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.7954545454545454) internal successors, (167), 44 states have internal predecessors, (167), 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) [2023-11-29 01:58:03,539 INFO L276 IsEmpty]: Start isEmpty. Operand 9354 states and 12665 transitions. [2023-11-29 01:58:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 01:58:03,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:03,540 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:58:03,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:58:03,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:58:03,741 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:03,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:03,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1108568633, now seen corresponding path program 1 times [2023-11-29 01:58:03,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:03,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257379346] [2023-11-29 01:58:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:03,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:03,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:03,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257379346] [2023-11-29 01:58:03,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257379346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:03,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275778188] [2023-11-29 01:58:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:03,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:03,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:03,828 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:03,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:58:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:03,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:58:03,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:04,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:04,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275778188] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:04,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:04,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-29 01:58:04,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63787340] [2023-11-29 01:58:04,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:04,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:58:04,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:04,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:58:04,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:58:04,127 INFO L87 Difference]: Start difference. First operand 9354 states and 12665 transitions. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 10 states have internal predecessors, (106), 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) [2023-11-29 01:58:04,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:04,702 INFO L93 Difference]: Finished difference Result 18358 states and 24894 transitions. [2023-11-29 01:58:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:58:04,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 10 states have internal predecessors, (106), 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 63 [2023-11-29 01:58:04,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:04,741 INFO L225 Difference]: With dead ends: 18358 [2023-11-29 01:58:04,741 INFO L226 Difference]: Without dead ends: 11947 [2023-11-29 01:58:04,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:58:04,749 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 267 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:04,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 248 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:58:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11947 states. [2023-11-29 01:58:05,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11947 to 11039. [2023-11-29 01:58:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11039 states, 11038 states have (on average 1.3299510780938575) internal successors, (14680), 11038 states have internal predecessors, (14680), 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) [2023-11-29 01:58:05,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11039 states to 11039 states and 14680 transitions. [2023-11-29 01:58:05,201 INFO L78 Accepts]: Start accepts. Automaton has 11039 states and 14680 transitions. Word has length 63 [2023-11-29 01:58:05,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:05,201 INFO L495 AbstractCegarLoop]: Abstraction has 11039 states and 14680 transitions. [2023-11-29 01:58:05,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 10 states have internal predecessors, (106), 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) [2023-11-29 01:58:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand 11039 states and 14680 transitions. [2023-11-29 01:58:05,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 01:58:05,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:05,202 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:58:05,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:58:05,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:58:05,403 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:05,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:05,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1533332121, now seen corresponding path program 1 times [2023-11-29 01:58:05,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:05,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349385399] [2023-11-29 01:58:05,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:05,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:05,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:05,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349385399] [2023-11-29 01:58:05,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349385399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:05,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:05,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:58:05,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708446371] [2023-11-29 01:58:05,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:05,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:58:05,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:05,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:58:05,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:58:05,451 INFO L87 Difference]: Start difference. First operand 11039 states and 14680 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-29 01:58:06,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:06,018 INFO L93 Difference]: Finished difference Result 28745 states and 38141 transitions. [2023-11-29 01:58:06,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:58:06,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2023-11-29 01:58:06,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:06,045 INFO L225 Difference]: With dead ends: 28745 [2023-11-29 01:58:06,046 INFO L226 Difference]: Without dead ends: 17988 [2023-11-29 01:58:06,055 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 [2023-11-29 01:58:06,056 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 33 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:06,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 205 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:58:06,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17988 states. [2023-11-29 01:58:06,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17988 to 17341. [2023-11-29 01:58:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17341 states, 17340 states have (on average 1.310322952710496) internal successors, (22721), 17340 states have internal predecessors, (22721), 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) [2023-11-29 01:58:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17341 states to 17341 states and 22721 transitions. [2023-11-29 01:58:06,852 INFO L78 Accepts]: Start accepts. Automaton has 17341 states and 22721 transitions. Word has length 63 [2023-11-29 01:58:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:06,852 INFO L495 AbstractCegarLoop]: Abstraction has 17341 states and 22721 transitions. [2023-11-29 01:58:06,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-29 01:58:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 17341 states and 22721 transitions. [2023-11-29 01:58:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 01:58:06,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:06,854 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:58:06,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 01:58:06,854 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:06,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:06,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1303446791, now seen corresponding path program 1 times [2023-11-29 01:58:06,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:06,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418223999] [2023-11-29 01:58:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:06,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:06,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:06,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418223999] [2023-11-29 01:58:06,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418223999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:06,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:06,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:58:06,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193806928] [2023-11-29 01:58:06,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:06,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:58:06,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:06,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:58:06,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:58:06,888 INFO L87 Difference]: Start difference. First operand 17341 states and 22721 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-29 01:58:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:07,622 INFO L93 Difference]: Finished difference Result 37479 states and 49071 transitions. [2023-11-29 01:58:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:58:07,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2023-11-29 01:58:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:07,648 INFO L225 Difference]: With dead ends: 37479 [2023-11-29 01:58:07,648 INFO L226 Difference]: Without dead ends: 21149 [2023-11-29 01:58:07,659 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 [2023-11-29 01:58:07,659 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 36 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:07,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 180 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:58:07,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21149 states. [2023-11-29 01:58:08,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21149 to 16622. [2023-11-29 01:58:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16622 states, 16621 states have (on average 1.2945069490403707) internal successors, (21516), 16621 states have internal predecessors, (21516), 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) [2023-11-29 01:58:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16622 states to 16622 states and 21516 transitions. [2023-11-29 01:58:08,500 INFO L78 Accepts]: Start accepts. Automaton has 16622 states and 21516 transitions. Word has length 63 [2023-11-29 01:58:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:08,500 INFO L495 AbstractCegarLoop]: Abstraction has 16622 states and 21516 transitions. [2023-11-29 01:58:08,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-29 01:58:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 16622 states and 21516 transitions. [2023-11-29 01:58:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 01:58:08,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:08,504 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:58:08,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 01:58:08,504 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:08,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2133207879, now seen corresponding path program 1 times [2023-11-29 01:58:08,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:08,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270408943] [2023-11-29 01:58:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:08,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:08,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:08,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270408943] [2023-11-29 01:58:08,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270408943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:08,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474587576] [2023-11-29 01:58:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:08,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:08,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:08,630 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:08,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:58:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:08,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:58:08,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:08,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:08,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474587576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:08,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:08,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-29 01:58:08,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577662994] [2023-11-29 01:58:08,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:08,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:58:08,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:08,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:58:08,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:58:08,989 INFO L87 Difference]: Start difference. First operand 16622 states and 21516 transitions. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 10 states have internal predecessors, (106), 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) [2023-11-29 01:58:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:09,789 INFO L93 Difference]: Finished difference Result 22531 states and 29079 transitions. [2023-11-29 01:58:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:58:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 10 states have internal predecessors, (106), 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 63 [2023-11-29 01:58:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:09,803 INFO L225 Difference]: With dead ends: 22531 [2023-11-29 01:58:09,803 INFO L226 Difference]: Without dead ends: 16683 [2023-11-29 01:58:09,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:58:09,809 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 339 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:09,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 298 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:58:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16683 states. [2023-11-29 01:58:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16683 to 16408. [2023-11-29 01:58:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16408 states, 16407 states have (on average 1.2907295666483818) internal successors, (21177), 16407 states have internal predecessors, (21177), 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) [2023-11-29 01:58:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16408 states to 16408 states and 21177 transitions. [2023-11-29 01:58:10,475 INFO L78 Accepts]: Start accepts. Automaton has 16408 states and 21177 transitions. Word has length 63 [2023-11-29 01:58:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:10,475 INFO L495 AbstractCegarLoop]: Abstraction has 16408 states and 21177 transitions. [2023-11-29 01:58:10,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 10 states have internal predecessors, (106), 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) [2023-11-29 01:58:10,476 INFO L276 IsEmpty]: Start isEmpty. Operand 16408 states and 21177 transitions. [2023-11-29 01:58:10,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 01:58:10,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:10,477 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:58:10,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:58:10,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:10,678 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:10,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2096529319, now seen corresponding path program 1 times [2023-11-29 01:58:10,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:10,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341699453] [2023-11-29 01:58:10,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:10,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:10,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:10,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341699453] [2023-11-29 01:58:10,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341699453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:10,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340697381] [2023-11-29 01:58:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:10,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:10,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:10,777 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:10,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:58:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:10,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:58:10,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:11,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:11,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340697381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:11,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:11,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-29 01:58:11,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026231582] [2023-11-29 01:58:11,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:11,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:58:11,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:11,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:58:11,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:58:11,146 INFO L87 Difference]: Start difference. First operand 16408 states and 21177 transitions. Second operand has 11 states, 11 states have (on average 10.090909090909092) internal successors, (111), 10 states have internal predecessors, (111), 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) [2023-11-29 01:58:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:11,943 INFO L93 Difference]: Finished difference Result 24879 states and 32037 transitions. [2023-11-29 01:58:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:58:11,943 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.090909090909092) internal successors, (111), 10 states have internal predecessors, (111), 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 64 [2023-11-29 01:58:11,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:11,957 INFO L225 Difference]: With dead ends: 24879 [2023-11-29 01:58:11,958 INFO L226 Difference]: Without dead ends: 20390 [2023-11-29 01:58:11,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:58:11,963 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 379 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:11,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 215 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:58:11,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20390 states. [2023-11-29 01:58:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20390 to 19347. [2023-11-29 01:58:12,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19347 states, 19346 states have (on average 1.2855370619249458) internal successors, (24870), 19346 states have internal predecessors, (24870), 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) [2023-11-29 01:58:12,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19347 states to 19347 states and 24870 transitions. [2023-11-29 01:58:12,766 INFO L78 Accepts]: Start accepts. Automaton has 19347 states and 24870 transitions. Word has length 64 [2023-11-29 01:58:12,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:12,766 INFO L495 AbstractCegarLoop]: Abstraction has 19347 states and 24870 transitions. [2023-11-29 01:58:12,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.090909090909092) internal successors, (111), 10 states have internal predecessors, (111), 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) [2023-11-29 01:58:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 19347 states and 24870 transitions. [2023-11-29 01:58:12,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-29 01:58:12,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:12,777 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2023-11-29 01:58:12,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 01:58:12,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:12,978 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:12,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:12,978 INFO L85 PathProgramCache]: Analyzing trace with hash -35220252, now seen corresponding path program 1 times [2023-11-29 01:58:12,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:12,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099307200] [2023-11-29 01:58:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:12,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 01:58:13,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:13,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099307200] [2023-11-29 01:58:13,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099307200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:13,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:13,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:58:13,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316982723] [2023-11-29 01:58:13,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:13,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:58:13,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:13,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:58:13,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:58:13,029 INFO L87 Difference]: Start difference. First operand 19347 states and 24870 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2023-11-29 01:58:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:13,812 INFO L93 Difference]: Finished difference Result 24182 states and 30987 transitions. [2023-11-29 01:58:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:58:13,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 100 [2023-11-29 01:58:13,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:13,825 INFO L225 Difference]: With dead ends: 24182 [2023-11-29 01:58:13,825 INFO L226 Difference]: Without dead ends: 16016 [2023-11-29 01:58:13,833 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 [2023-11-29 01:58:13,834 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 40 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:13,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 169 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:58:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16016 states. [2023-11-29 01:58:14,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16016 to 11144. [2023-11-29 01:58:14,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11144 states, 11143 states have (on average 1.266983756618505) internal successors, (14118), 11143 states have internal predecessors, (14118), 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) [2023-11-29 01:58:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 14118 transitions. [2023-11-29 01:58:14,560 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 14118 transitions. Word has length 100 [2023-11-29 01:58:14,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:14,560 INFO L495 AbstractCegarLoop]: Abstraction has 11144 states and 14118 transitions. [2023-11-29 01:58:14,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2023-11-29 01:58:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 14118 transitions. [2023-11-29 01:58:14,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-29 01:58:14,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:14,566 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-11-29 01:58:14,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-29 01:58:14,567 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:14,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:14,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1985593770, now seen corresponding path program 1 times [2023-11-29 01:58:14,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:14,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585626284] [2023-11-29 01:58:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:14,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 01:58:14,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:14,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585626284] [2023-11-29 01:58:14,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585626284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:14,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:14,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:58:14,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385699217] [2023-11-29 01:58:14,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:14,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:58:14,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:14,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:58:14,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:58:14,630 INFO L87 Difference]: Start difference. First operand 11144 states and 14118 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2023-11-29 01:58:15,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:15,055 INFO L93 Difference]: Finished difference Result 14567 states and 18357 transitions. [2023-11-29 01:58:15,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:58:15,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 101 [2023-11-29 01:58:15,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:15,061 INFO L225 Difference]: With dead ends: 14567 [2023-11-29 01:58:15,062 INFO L226 Difference]: Without dead ends: 8163 [2023-11-29 01:58:15,066 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 [2023-11-29 01:58:15,067 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 25 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:15,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 161 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:58:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2023-11-29 01:58:15,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 8161. [2023-11-29 01:58:15,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8161 states, 8160 states have (on average 1.2416666666666667) internal successors, (10132), 8160 states have internal predecessors, (10132), 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) [2023-11-29 01:58:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8161 states to 8161 states and 10132 transitions. [2023-11-29 01:58:15,464 INFO L78 Accepts]: Start accepts. Automaton has 8161 states and 10132 transitions. Word has length 101 [2023-11-29 01:58:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:15,464 INFO L495 AbstractCegarLoop]: Abstraction has 8161 states and 10132 transitions. [2023-11-29 01:58:15,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2023-11-29 01:58:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 8161 states and 10132 transitions. [2023-11-29 01:58:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-29 01:58:15,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:15,468 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-11-29 01:58:15,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-29 01:58:15,468 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:15,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:15,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2140854758, now seen corresponding path program 1 times [2023-11-29 01:58:15,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:15,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99498655] [2023-11-29 01:58:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:15,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 01:58:15,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:15,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99498655] [2023-11-29 01:58:15,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99498655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:15,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:15,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:58:15,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137296431] [2023-11-29 01:58:15,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:15,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:58:15,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:15,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:58:15,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:58:15,518 INFO L87 Difference]: Start difference. First operand 8161 states and 10132 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2023-11-29 01:58:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:16,068 INFO L93 Difference]: Finished difference Result 21124 states and 26046 transitions. [2023-11-29 01:58:16,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:58:16,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 101 [2023-11-29 01:58:16,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:16,078 INFO L225 Difference]: With dead ends: 21124 [2023-11-29 01:58:16,078 INFO L226 Difference]: Without dead ends: 13349 [2023-11-29 01:58:16,084 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 [2023-11-29 01:58:16,084 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 26 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:16,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 198 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:58:16,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13349 states. [2023-11-29 01:58:16,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13349 to 11534. [2023-11-29 01:58:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11534 states, 11533 states have (on average 1.202549206624469) internal successors, (13869), 11533 states have internal predecessors, (13869), 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) [2023-11-29 01:58:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11534 states to 11534 states and 13869 transitions. [2023-11-29 01:58:16,631 INFO L78 Accepts]: Start accepts. Automaton has 11534 states and 13869 transitions. Word has length 101 [2023-11-29 01:58:16,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:16,631 INFO L495 AbstractCegarLoop]: Abstraction has 11534 states and 13869 transitions. [2023-11-29 01:58:16,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2023-11-29 01:58:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 11534 states and 13869 transitions. [2023-11-29 01:58:16,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-29 01:58:16,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:16,635 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-11-29 01:58:16,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-29 01:58:16,635 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:16,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:16,636 INFO L85 PathProgramCache]: Analyzing trace with hash 379930034, now seen corresponding path program 1 times [2023-11-29 01:58:16,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:16,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458545324] [2023-11-29 01:58:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:16,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 29 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 01:58:17,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:17,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458545324] [2023-11-29 01:58:17,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458545324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:17,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464639982] [2023-11-29 01:58:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:17,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:17,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:17,082 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:17,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:58:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:17,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 01:58:17,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:18,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 34 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:20,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464639982] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:20,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:20,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 14] total 31 [2023-11-29 01:58:20,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729939511] [2023-11-29 01:58:20,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:20,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 01:58:20,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:20,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 01:58:20,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2023-11-29 01:58:20,213 INFO L87 Difference]: Start difference. First operand 11534 states and 13869 transitions. Second operand has 31 states, 31 states have (on average 7.709677419354839) internal successors, (239), 31 states have internal predecessors, (239), 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) [2023-11-29 01:58:22,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:22,989 INFO L93 Difference]: Finished difference Result 31377 states and 37732 transitions. [2023-11-29 01:58:22,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 01:58:22,989 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 7.709677419354839) internal successors, (239), 31 states have internal predecessors, (239), 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 101 [2023-11-29 01:58:22,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:23,004 INFO L225 Difference]: With dead ends: 31377 [2023-11-29 01:58:23,005 INFO L226 Difference]: Without dead ends: 21259 [2023-11-29 01:58:23,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=776, Invalid=2530, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 01:58:23,012 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 961 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:23,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 1089 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:58:23,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21259 states. [2023-11-29 01:58:23,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21259 to 16291. [2023-11-29 01:58:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16291 states, 16290 states have (on average 1.1987108655616943) internal successors, (19527), 16290 states have internal predecessors, (19527), 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) [2023-11-29 01:58:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16291 states to 16291 states and 19527 transitions. [2023-11-29 01:58:23,974 INFO L78 Accepts]: Start accepts. Automaton has 16291 states and 19527 transitions. Word has length 101 [2023-11-29 01:58:23,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:23,975 INFO L495 AbstractCegarLoop]: Abstraction has 16291 states and 19527 transitions. [2023-11-29 01:58:23,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.709677419354839) internal successors, (239), 31 states have internal predecessors, (239), 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) [2023-11-29 01:58:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 16291 states and 19527 transitions. [2023-11-29 01:58:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-29 01:58:23,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:23,983 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-11-29 01:58:23,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:58:24,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 01:58:24,183 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:24,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:24,184 INFO L85 PathProgramCache]: Analyzing trace with hash -154721782, now seen corresponding path program 1 times [2023-11-29 01:58:24,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:24,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134451253] [2023-11-29 01:58:24,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:24,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 01:58:24,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:24,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134451253] [2023-11-29 01:58:24,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134451253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:24,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539285807] [2023-11-29 01:58:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:24,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:24,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:24,641 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:24,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:58:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:24,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:58:24,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:25,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:27,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539285807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:27,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:27,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 29 [2023-11-29 01:58:27,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336667865] [2023-11-29 01:58:27,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:27,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 01:58:27,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:27,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 01:58:27,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2023-11-29 01:58:27,783 INFO L87 Difference]: Start difference. First operand 16291 states and 19527 transitions. Second operand has 29 states, 29 states have (on average 8.827586206896552) internal successors, (256), 29 states have internal predecessors, (256), 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) [2023-11-29 01:58:39,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:39,929 INFO L93 Difference]: Finished difference Result 67692 states and 80814 transitions. [2023-11-29 01:58:39,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-11-29 01:58:39,930 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 8.827586206896552) internal successors, (256), 29 states have internal predecessors, (256), 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 102 [2023-11-29 01:58:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:39,971 INFO L225 Difference]: With dead ends: 67692 [2023-11-29 01:58:39,971 INFO L226 Difference]: Without dead ends: 54913 [2023-11-29 01:58:39,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5647 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2986, Invalid=14836, Unknown=0, NotChecked=0, Total=17822 [2023-11-29 01:58:39,983 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 2628 mSDsluCounter, 2488 mSDsCounter, 0 mSdLazyCounter, 2829 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2628 SdHoareTripleChecker+Valid, 2663 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:39,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2628 Valid, 2663 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2829 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 01:58:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54913 states. [2023-11-29 01:58:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54913 to 28539. [2023-11-29 01:58:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28539 states, 28538 states have (on average 1.19731585955568) internal successors, (34169), 28538 states have internal predecessors, (34169), 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) [2023-11-29 01:58:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28539 states to 28539 states and 34169 transitions. [2023-11-29 01:58:41,899 INFO L78 Accepts]: Start accepts. Automaton has 28539 states and 34169 transitions. Word has length 102 [2023-11-29 01:58:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:41,899 INFO L495 AbstractCegarLoop]: Abstraction has 28539 states and 34169 transitions. [2023-11-29 01:58:41,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.827586206896552) internal successors, (256), 29 states have internal predecessors, (256), 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) [2023-11-29 01:58:41,899 INFO L276 IsEmpty]: Start isEmpty. Operand 28539 states and 34169 transitions. [2023-11-29 01:58:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 01:58:41,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:41,905 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-11-29 01:58:41,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 01:58:42,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 01:58:42,105 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:42,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:42,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1140821016, now seen corresponding path program 1 times [2023-11-29 01:58:42,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:42,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447849945] [2023-11-29 01:58:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:42,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 13 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:43,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:43,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447849945] [2023-11-29 01:58:43,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447849945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:43,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683026436] [2023-11-29 01:58:43,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:43,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:43,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:43,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:43,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:58:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:43,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:58:43,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:44,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:47,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683026436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:47,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:47,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 45 [2023-11-29 01:58:47,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708859911] [2023-11-29 01:58:47,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:47,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 01:58:47,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:47,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 01:58:47,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1818, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 01:58:47,062 INFO L87 Difference]: Start difference. First operand 28539 states and 34169 transitions. Second operand has 45 states, 45 states have (on average 6.4) internal successors, (288), 45 states have internal predecessors, (288), 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) [2023-11-29 01:59:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:26,527 INFO L93 Difference]: Finished difference Result 64082 states and 76422 transitions. [2023-11-29 01:59:26,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2023-11-29 01:59:26,528 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.4) internal successors, (288), 45 states have internal predecessors, (288), 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 103 [2023-11-29 01:59:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:26,569 INFO L225 Difference]: With dead ends: 64082 [2023-11-29 01:59:26,569 INFO L226 Difference]: Without dead ends: 51351 [2023-11-29 01:59:26,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19879 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=7552, Invalid=41954, Unknown=0, NotChecked=0, Total=49506 [2023-11-29 01:59:26,582 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 4781 mSDsluCounter, 3883 mSDsCounter, 0 mSdLazyCounter, 4209 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4781 SdHoareTripleChecker+Valid, 3996 SdHoareTripleChecker+Invalid, 4488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 4209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:26,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4781 Valid, 3996 Invalid, 4488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 4209 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-29 01:59:26,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51351 states. [2023-11-29 01:59:29,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51351 to 31194. [2023-11-29 01:59:29,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31194 states, 31193 states have (on average 1.2001410572884943) internal successors, (37436), 31193 states have internal predecessors, (37436), 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) [2023-11-29 01:59:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31194 states to 31194 states and 37436 transitions. [2023-11-29 01:59:29,088 INFO L78 Accepts]: Start accepts. Automaton has 31194 states and 37436 transitions. Word has length 103 [2023-11-29 01:59:29,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:29,089 INFO L495 AbstractCegarLoop]: Abstraction has 31194 states and 37436 transitions. [2023-11-29 01:59:29,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.4) internal successors, (288), 45 states have internal predecessors, (288), 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) [2023-11-29 01:59:29,089 INFO L276 IsEmpty]: Start isEmpty. Operand 31194 states and 37436 transitions. [2023-11-29 01:59:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 01:59:29,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:29,094 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-11-29 01:59:29,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:59:29,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 01:59:29,295 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:59:29,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:29,295 INFO L85 PathProgramCache]: Analyzing trace with hash -812917370, now seen corresponding path program 1 times [2023-11-29 01:59:29,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:29,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476745456] [2023-11-29 01:59:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:29,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 01:59:29,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:29,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476745456] [2023-11-29 01:59:29,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476745456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:59:29,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:59:29,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:59:29,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997427845] [2023-11-29 01:59:29,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:59:29,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:59:29,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:29,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:59:29,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:59:29,355 INFO L87 Difference]: Start difference. First operand 31194 states and 37436 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-11-29 01:59:31,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:31,149 INFO L93 Difference]: Finished difference Result 37140 states and 44435 transitions. [2023-11-29 01:59:31,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:31,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 103 [2023-11-29 01:59:31,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:31,168 INFO L225 Difference]: With dead ends: 37140 [2023-11-29 01:59:31,168 INFO L226 Difference]: Without dead ends: 24519 [2023-11-29 01:59:31,177 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 [2023-11-29 01:59:31,177 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:31,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 180 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:59:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24519 states. [2023-11-29 01:59:32,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24519 to 19449. [2023-11-29 01:59:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19449 states, 19448 states have (on average 1.171740024681201) internal successors, (22788), 19448 states have internal predecessors, (22788), 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) [2023-11-29 01:59:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19449 states to 19449 states and 22788 transitions. [2023-11-29 01:59:32,807 INFO L78 Accepts]: Start accepts. Automaton has 19449 states and 22788 transitions. Word has length 103 [2023-11-29 01:59:32,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:32,807 INFO L495 AbstractCegarLoop]: Abstraction has 19449 states and 22788 transitions. [2023-11-29 01:59:32,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2023-11-29 01:59:32,807 INFO L276 IsEmpty]: Start isEmpty. Operand 19449 states and 22788 transitions. [2023-11-29 01:59:32,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 01:59:32,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:32,811 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-11-29 01:59:32,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-29 01:59:32,812 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:59:32,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:32,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1367174196, now seen corresponding path program 1 times [2023-11-29 01:59:32,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:32,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66315637] [2023-11-29 01:59:32,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:32,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:33,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:33,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66315637] [2023-11-29 01:59:33,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66315637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:33,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242973252] [2023-11-29 01:59:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:33,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:33,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:33,835 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:33,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:59:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:33,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:59:33,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:34,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:36,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242973252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:36,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:59:36,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 41 [2023-11-29 01:59:36,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15969689] [2023-11-29 01:59:36,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:36,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 01:59:36,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 01:59:36,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1496, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 01:59:36,739 INFO L87 Difference]: Start difference. First operand 19449 states and 22788 transitions. Second operand has 41 states, 41 states have (on average 7.0) internal successors, (287), 41 states have internal predecessors, (287), 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) [2023-11-29 01:59:52,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:52,421 INFO L93 Difference]: Finished difference Result 45908 states and 53782 transitions. [2023-11-29 01:59:52,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-11-29 01:59:52,422 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 7.0) internal successors, (287), 41 states have internal predecessors, (287), 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 103 [2023-11-29 01:59:52,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:52,448 INFO L225 Difference]: With dead ends: 45908 [2023-11-29 01:59:52,448 INFO L226 Difference]: Without dead ends: 35017 [2023-11-29 01:59:52,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6778 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=3110, Invalid=17482, Unknown=0, NotChecked=0, Total=20592 [2023-11-29 01:59:52,456 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 2190 mSDsluCounter, 3493 mSDsCounter, 0 mSdLazyCounter, 4017 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2190 SdHoareTripleChecker+Valid, 3604 SdHoareTripleChecker+Invalid, 4152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 4017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:52,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2190 Valid, 3604 Invalid, 4152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 4017 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 01:59:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35017 states. [2023-11-29 01:59:54,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35017 to 23920. [2023-11-29 01:59:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23920 states, 23919 states have (on average 1.1751327396630293) internal successors, (28108), 23919 states have internal predecessors, (28108), 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) [2023-11-29 01:59:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23920 states to 23920 states and 28108 transitions. [2023-11-29 01:59:54,646 INFO L78 Accepts]: Start accepts. Automaton has 23920 states and 28108 transitions. Word has length 103 [2023-11-29 01:59:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:54,646 INFO L495 AbstractCegarLoop]: Abstraction has 23920 states and 28108 transitions. [2023-11-29 01:59:54,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 7.0) internal successors, (287), 41 states have internal predecessors, (287), 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) [2023-11-29 01:59:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 23920 states and 28108 transitions. [2023-11-29 01:59:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-29 01:59:54,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:54,651 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-11-29 01:59:54,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:59:54,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 01:59:54,851 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:59:54,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:54,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1773359352, now seen corresponding path program 1 times [2023-11-29 01:59:54,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:54,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653555508] [2023-11-29 01:59:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:54,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:56,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:56,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653555508] [2023-11-29 01:59:56,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653555508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:56,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459895256] [2023-11-29 01:59:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:56,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:56,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:56,683 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:56,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:59:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:56,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:59:56,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:59:57,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 35 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:00:00,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459895256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:00:00,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:00:00,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 14] total 42 [2023-11-29 02:00:00,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049061183] [2023-11-29 02:00:00,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:00,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 02:00:00,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:00,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 02:00:00,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 02:00:00,299 INFO L87 Difference]: Start difference. First operand 23920 states and 28108 transitions. Second operand has 42 states, 42 states have (on average 7.0) internal successors, (294), 42 states have internal predecessors, (294), 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) [2023-11-29 02:02:36,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:02:36,489 INFO L93 Difference]: Finished difference Result 93141 states and 108960 transitions. [2023-11-29 02:02:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 785 states. [2023-11-29 02:02:36,490 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 7.0) internal successors, (294), 42 states have internal predecessors, (294), 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 104 [2023-11-29 02:02:36,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:02:36,548 INFO L225 Difference]: With dead ends: 93141 [2023-11-29 02:02:36,548 INFO L226 Difference]: Without dead ends: 83173 [2023-11-29 02:02:36,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1006 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 819 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309206 ImplicationChecksByTransitivity, 140.0s TimeCoverageRelationStatistics Valid=52414, Invalid=620806, Unknown=0, NotChecked=0, Total=673220 [2023-11-29 02:02:36,581 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 5928 mSDsluCounter, 8715 mSDsCounter, 0 mSdLazyCounter, 9375 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5928 SdHoareTripleChecker+Valid, 9038 SdHoareTripleChecker+Invalid, 9685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 9375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:02:36,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5928 Valid, 9038 Invalid, 9685 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [310 Valid, 9375 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-11-29 02:02:36,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83173 states. [2023-11-29 02:02:41,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83173 to 45375. [2023-11-29 02:02:41,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45375 states, 45374 states have (on average 1.1762242694053864) internal successors, (53370), 45374 states have internal predecessors, (53370), 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) [2023-11-29 02:02:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45375 states to 45375 states and 53370 transitions. [2023-11-29 02:02:41,762 INFO L78 Accepts]: Start accepts. Automaton has 45375 states and 53370 transitions. Word has length 104 [2023-11-29 02:02:41,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:02:41,762 INFO L495 AbstractCegarLoop]: Abstraction has 45375 states and 53370 transitions. [2023-11-29 02:02:41,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 7.0) internal successors, (294), 42 states have internal predecessors, (294), 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) [2023-11-29 02:02:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 45375 states and 53370 transitions. [2023-11-29 02:02:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-29 02:02:41,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:02:41,767 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-11-29 02:02:41,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:02:41,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 02:02:41,968 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:02:41,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:41,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1029963074, now seen corresponding path program 1 times [2023-11-29 02:02:41,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:02:41,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660942380] [2023-11-29 02:02:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:41,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:02:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:02:42,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:02:42,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660942380] [2023-11-29 02:02:42,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660942380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:02:42,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338521864] [2023-11-29 02:02:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:42,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:02:42,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:02:42,807 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:02:42,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:02:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:42,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 02:02:42,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 45 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:02:44,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:02:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:02:46,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338521864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:02:46,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:02:46,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 42 [2023-11-29 02:02:46,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890749954] [2023-11-29 02:02:46,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:02:46,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 02:02:46,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:02:46,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 02:02:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 02:02:46,380 INFO L87 Difference]: Start difference. First operand 45375 states and 53370 transitions. Second operand has 42 states, 42 states have (on average 6.809523809523809) internal successors, (286), 42 states have internal predecessors, (286), 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) [2023-11-29 02:03:05,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:03:05,391 INFO L93 Difference]: Finished difference Result 93882 states and 110788 transitions. [2023-11-29 02:03:05,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-11-29 02:03:05,392 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.809523809523809) internal successors, (286), 42 states have internal predecessors, (286), 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 104 [2023-11-29 02:03:05,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:03:05,453 INFO L225 Difference]: With dead ends: 93882 [2023-11-29 02:03:05,453 INFO L226 Difference]: Without dead ends: 77770 [2023-11-29 02:03:05,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5941 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3435, Invalid=16871, Unknown=0, NotChecked=0, Total=20306 [2023-11-29 02:03:05,464 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 2135 mSDsluCounter, 6380 mSDsCounter, 0 mSdLazyCounter, 5324 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2135 SdHoareTripleChecker+Valid, 6580 SdHoareTripleChecker+Invalid, 5432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 5324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:03:05,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2135 Valid, 6580 Invalid, 5432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 5324 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-29 02:03:05,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77770 states. [2023-11-29 02:03:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77770 to 42087. [2023-11-29 02:03:10,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42087 states, 42086 states have (on average 1.1744285510621109) internal successors, (49427), 42086 states have internal predecessors, (49427), 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) [2023-11-29 02:03:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42087 states to 42087 states and 49427 transitions. [2023-11-29 02:03:10,455 INFO L78 Accepts]: Start accepts. Automaton has 42087 states and 49427 transitions. Word has length 104 [2023-11-29 02:03:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:03:10,456 INFO L495 AbstractCegarLoop]: Abstraction has 42087 states and 49427 transitions. [2023-11-29 02:03:10,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.809523809523809) internal successors, (286), 42 states have internal predecessors, (286), 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) [2023-11-29 02:03:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 42087 states and 49427 transitions. [2023-11-29 02:03:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-29 02:03:10,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:03:10,460 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-11-29 02:03:10,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 02:03:10,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:03:10,661 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:03:10,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:10,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1542185058, now seen corresponding path program 1 times [2023-11-29 02:03:10,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:10,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605691875] [2023-11-29 02:03:10,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:10,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 23 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:03:11,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:03:11,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605691875] [2023-11-29 02:03:11,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605691875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:03:11,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488626934] [2023-11-29 02:03:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:11,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:03:11,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:03:11,248 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:03:11,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:03:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:11,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:03:11,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:03:12,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:03:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 14 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:03:14,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488626934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:03:14,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:03:14,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 39 [2023-11-29 02:03:14,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416535457] [2023-11-29 02:03:14,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:03:14,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 02:03:14,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:03:14,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 02:03:14,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 02:03:14,175 INFO L87 Difference]: Start difference. First operand 42087 states and 49427 transitions. Second operand has 39 states, 39 states have (on average 7.3076923076923075) internal successors, (285), 39 states have internal predecessors, (285), 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) [2023-11-29 02:03:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:03:33,751 INFO L93 Difference]: Finished difference Result 121006 states and 142359 transitions. [2023-11-29 02:03:33,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-29 02:03:33,752 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 7.3076923076923075) internal successors, (285), 39 states have internal predecessors, (285), 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 104 [2023-11-29 02:03:33,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:03:33,929 INFO L225 Difference]: With dead ends: 121006 [2023-11-29 02:03:33,929 INFO L226 Difference]: Without dead ends: 97141 [2023-11-29 02:03:33,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6547 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3855, Invalid=16737, Unknown=0, NotChecked=0, Total=20592 [2023-11-29 02:03:33,943 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 3006 mSDsluCounter, 3629 mSDsCounter, 0 mSdLazyCounter, 3301 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3006 SdHoareTripleChecker+Valid, 3755 SdHoareTripleChecker+Invalid, 3453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 3301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:03:33,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3006 Valid, 3755 Invalid, 3453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 3301 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 02:03:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97141 states. [2023-11-29 02:03:44,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97141 to 86341. [2023-11-29 02:03:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86341 states, 86340 states have (on average 1.1777507528376188) internal successors, (101687), 86340 states have internal predecessors, (101687), 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) [2023-11-29 02:03:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86341 states to 86341 states and 101687 transitions. [2023-11-29 02:03:44,407 INFO L78 Accepts]: Start accepts. Automaton has 86341 states and 101687 transitions. Word has length 104 [2023-11-29 02:03:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:03:44,408 INFO L495 AbstractCegarLoop]: Abstraction has 86341 states and 101687 transitions. [2023-11-29 02:03:44,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 7.3076923076923075) internal successors, (285), 39 states have internal predecessors, (285), 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) [2023-11-29 02:03:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 86341 states and 101687 transitions. [2023-11-29 02:03:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-29 02:03:44,414 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:03:44,414 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:44,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:03:44,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 02:03:44,615 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:03:44,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:44,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2034008414, now seen corresponding path program 1 times [2023-11-29 02:03:44,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:44,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399882313] [2023-11-29 02:03:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:44,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 02:03:45,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:03:45,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399882313] [2023-11-29 02:03:45,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399882313] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:03:45,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099050684] [2023-11-29 02:03:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:45,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:03:45,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:03:45,244 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:03:45,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:03:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:45,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 02:03:45,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 02:03:46,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:03:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 02:03:48,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099050684] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:03:48,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:03:48,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 32 [2023-11-29 02:03:48,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896208593] [2023-11-29 02:03:48,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:03:48,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 02:03:48,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:03:48,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 02:03:48,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 02:03:48,395 INFO L87 Difference]: Start difference. First operand 86341 states and 101687 transitions. Second operand has 33 states, 33 states have (on average 6.454545454545454) internal successors, (213), 32 states have internal predecessors, (213), 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) [2023-11-29 02:04:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:04:14,114 INFO L93 Difference]: Finished difference Result 212885 states and 250245 transitions. [2023-11-29 02:04:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 02:04:14,114 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.454545454545454) internal successors, (213), 32 states have internal predecessors, (213), 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 105 [2023-11-29 02:04:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:04:14,314 INFO L225 Difference]: With dead ends: 212885 [2023-11-29 02:04:14,314 INFO L226 Difference]: Without dead ends: 198080 [2023-11-29 02:04:14,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=808, Invalid=3224, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 02:04:14,331 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1196 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:04:14,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1196 Valid, 1670 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:04:14,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198080 states. [2023-11-29 02:04:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198080 to 84432. [2023-11-29 02:04:26,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84432 states, 84431 states have (on average 1.1778967440868875) internal successors, (99451), 84431 states have internal predecessors, (99451), 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) [2023-11-29 02:04:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84432 states to 84432 states and 99451 transitions. [2023-11-29 02:04:26,233 INFO L78 Accepts]: Start accepts. Automaton has 84432 states and 99451 transitions. Word has length 105 [2023-11-29 02:04:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:04:26,234 INFO L495 AbstractCegarLoop]: Abstraction has 84432 states and 99451 transitions. [2023-11-29 02:04:26,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.454545454545454) internal successors, (213), 32 states have internal predecessors, (213), 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) [2023-11-29 02:04:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 84432 states and 99451 transitions. [2023-11-29 02:04:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-29 02:04:26,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:04:26,238 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:04:26,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:04:26,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 02:04:26,439 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:04:26,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:04:26,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2135222748, now seen corresponding path program 1 times [2023-11-29 02:04:26,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:04:26,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637100663] [2023-11-29 02:04:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:26,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:04:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:04:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:04:27,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:04:27,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637100663] [2023-11-29 02:04:27,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637100663] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:04:27,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335943985] [2023-11-29 02:04:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:27,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:04:27,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:04:27,189 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:04:27,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:04:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:04:27,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 02:04:27,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:04:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:04:28,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:04:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 63 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:04:30,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335943985] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:04:30,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:04:30,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 15] total 42 [2023-11-29 02:04:30,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894179469] [2023-11-29 02:04:30,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:04:30,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 02:04:30,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:04:30,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 02:04:30,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 02:04:30,440 INFO L87 Difference]: Start difference. First operand 84432 states and 99451 transitions. Second operand has 43 states, 43 states have (on average 6.883720930232558) internal successors, (296), 42 states have internal predecessors, (296), 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) [2023-11-29 02:04:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:04:42,773 INFO L93 Difference]: Finished difference Result 97997 states and 114955 transitions. [2023-11-29 02:04:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 02:04:42,774 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.883720930232558) internal successors, (296), 42 states have internal predecessors, (296), 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 105 [2023-11-29 02:04:42,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:04:42,843 INFO L225 Difference]: With dead ends: 97997 [2023-11-29 02:04:42,843 INFO L226 Difference]: Without dead ends: 89369 [2023-11-29 02:04:42,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1018, Invalid=4094, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 02:04:42,857 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 1871 mSDsluCounter, 1828 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1871 SdHoareTripleChecker+Valid, 1905 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:04:42,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1871 Valid, 1905 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:04:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89369 states. [2023-11-29 02:04:53,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89369 to 83794. [2023-11-29 02:04:53,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83794 states, 83793 states have (on average 1.1779026887687516) internal successors, (98700), 83793 states have internal predecessors, (98700), 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) [2023-11-29 02:04:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83794 states to 83794 states and 98700 transitions. [2023-11-29 02:04:53,523 INFO L78 Accepts]: Start accepts. Automaton has 83794 states and 98700 transitions. Word has length 105 [2023-11-29 02:04:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:04:53,523 INFO L495 AbstractCegarLoop]: Abstraction has 83794 states and 98700 transitions. [2023-11-29 02:04:53,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.883720930232558) internal successors, (296), 42 states have internal predecessors, (296), 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) [2023-11-29 02:04:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 83794 states and 98700 transitions. [2023-11-29 02:04:53,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-29 02:04:53,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:04:53,528 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:04:53,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:04:53,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 02:04:53,728 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:04:53,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:04:53,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1833929962, now seen corresponding path program 1 times [2023-11-29 02:04:53,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:04:53,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687817569] [2023-11-29 02:04:53,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:53,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:04:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:04:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 13 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:04:55,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:04:55,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687817569] [2023-11-29 02:04:55,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687817569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:04:55,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493896077] [2023-11-29 02:04:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:55,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:04:55,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:04:55,138 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:04:55,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:04:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:04:55,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 02:04:55,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:04:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 23 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:04:57,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 23 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:01,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493896077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:05:01,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:05:01,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 18] total 58 [2023-11-29 02:05:01,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487131573] [2023-11-29 02:05:01,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:01,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-29 02:05:01,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:01,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-29 02:05:01,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 02:05:01,236 INFO L87 Difference]: Start difference. First operand 83794 states and 98700 transitions. Second operand has 58 states, 58 states have (on average 5.155172413793103) internal successors, (299), 58 states have internal predecessors, (299), 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) [2023-11-29 02:05:17,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 02:07:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:08,001 INFO L93 Difference]: Finished difference Result 110566 states and 129481 transitions. [2023-11-29 02:07:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 390 states. [2023-11-29 02:07:08,002 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 5.155172413793103) internal successors, (299), 58 states have internal predecessors, (299), 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 106 [2023-11-29 02:07:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:08,084 INFO L225 Difference]: With dead ends: 110566 [2023-11-29 02:07:08,084 INFO L226 Difference]: Without dead ends: 92383 [2023-11-29 02:07:08,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 441 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78320 ImplicationChecksByTransitivity, 102.4s TimeCoverageRelationStatistics Valid=20940, Invalid=174866, Unknown=0, NotChecked=0, Total=195806 [2023-11-29 02:07:08,107 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 7335 mSDsluCounter, 8610 mSDsCounter, 0 mSdLazyCounter, 10489 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7335 SdHoareTripleChecker+Valid, 8938 SdHoareTripleChecker+Invalid, 10973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 10489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:08,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7335 Valid, 8938 Invalid, 10973 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [484 Valid, 10489 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2023-11-29 02:07:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92383 states. [2023-11-29 02:07:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92383 to 83780. [2023-11-29 02:07:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83780 states, 83779 states have (on average 1.177323672996813) internal successors, (98635), 83779 states have internal predecessors, (98635), 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) [2023-11-29 02:07:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83780 states to 83780 states and 98635 transitions. [2023-11-29 02:07:21,050 INFO L78 Accepts]: Start accepts. Automaton has 83780 states and 98635 transitions. Word has length 106 [2023-11-29 02:07:21,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:21,050 INFO L495 AbstractCegarLoop]: Abstraction has 83780 states and 98635 transitions. [2023-11-29 02:07:21,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 5.155172413793103) internal successors, (299), 58 states have internal predecessors, (299), 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) [2023-11-29 02:07:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 83780 states and 98635 transitions. [2023-11-29 02:07:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-29 02:07:21,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:21,056 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:07:21,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:07:21,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:21,256 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:07:21,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:21,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1624824434, now seen corresponding path program 1 times [2023-11-29 02:07:21,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:21,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494232574] [2023-11-29 02:07:21,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:21,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 23 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:22,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:07:22,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494232574] [2023-11-29 02:07:22,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494232574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:07:22,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802698258] [2023-11-29 02:07:22,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:22,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:22,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:07:22,726 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:07:22,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af4d4ec-3ab2-4347-a999-1fabb1f86b33/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:07:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:22,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 02:07:22,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:07:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:24,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:07:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:28,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802698258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:07:28,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:07:28,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 17] total 54 [2023-11-29 02:07:28,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964227586] [2023-11-29 02:07:28,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:07:28,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 02:07:28,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:28,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 02:07:28,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2657, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 02:07:28,849 INFO L87 Difference]: Start difference. First operand 83780 states and 98635 transitions. Second operand has 54 states, 54 states have (on average 5.37037037037037) internal successors, (290), 54 states have internal predecessors, (290), 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) [2023-11-29 02:10:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:41,584 INFO L93 Difference]: Finished difference Result 162897 states and 190759 transitions. [2023-11-29 02:10:41,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 486 states. [2023-11-29 02:10:41,586 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.37037037037037) internal successors, (290), 54 states have internal predecessors, (290), 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 107 [2023-11-29 02:10:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:41,710 INFO L225 Difference]: With dead ends: 162897 [2023-11-29 02:10:41,710 INFO L226 Difference]: Without dead ends: 127279 [2023-11-29 02:10:41,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 536 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122529 ImplicationChecksByTransitivity, 162.9s TimeCoverageRelationStatistics Valid=28094, Invalid=260812, Unknown=0, NotChecked=0, Total=288906 [2023-11-29 02:10:41,736 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 6485 mSDsluCounter, 7647 mSDsCounter, 0 mSdLazyCounter, 7977 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6485 SdHoareTripleChecker+Valid, 7927 SdHoareTripleChecker+Invalid, 8396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 7977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:41,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6485 Valid, 7927 Invalid, 8396 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [419 Valid, 7977 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2023-11-29 02:10:41,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127279 states.